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import qemu-kvm-6.2.0-32.module+el8.8.0+18361+9f407f6e

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CentOS Sources 2023-05-16 06:05:48 +00:00 committed by Stepan Oksanichenko
parent bb332c3e0a
commit 9cf15efa74
93 changed files with 11860 additions and 122 deletions
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82
SOURCES/kvm-KVM-keep-track-of-running-ioctls.patch Normal file
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@ -0,0 +1,82 @@
From 9bacf8c4104ff3cff2e0e2c2179ec4fda633167f Mon Sep 17 00:00:00 2001
From: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Date: Mon, 16 Jan 2023 07:51:08 -0500
Subject: [PATCH 05/11] KVM: keep track of running ioctls
RH-Author: Emanuele Giuseppe Esposito <eesposit@redhat.com>
RH-MergeRequest: 247: accel: introduce accelerator blocker API
RH-Bugzilla: 2161188
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Acked-by: Vitaly Kuznetsov <vkuznets@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [2/3] 357508389e2a0fd996206b406e9e235e50b5f0b6
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2161188
commit a27dd2de68f37ba96fe164a42121daa5f0750afc
Author: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Date: Fri Nov 11 10:47:57 2022 -0500
KVM: keep track of running ioctls
Using the new accel-blocker API, mark where ioctls are being called
in KVM. Next, we will implement the critical section that will take
care of performing memslots modifications atomically, therefore
preventing any new ioctl from running and allowing the running ones
to finish.
Signed-off-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-Id: <20221111154758.1372674-3-eesposit@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
---
accel/kvm/kvm-all.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 8f2a53438f..221aadfda7 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -2337,6 +2337,7 @@ static int kvm_init(MachineState *ms)
assert(TARGET_PAGE_SIZE <= qemu_real_host_page_size);
s->sigmask_len = 8;
+ accel_blocker_init();
#ifdef KVM_CAP_SET_GUEST_DEBUG
QTAILQ_INIT(&s->kvm_sw_breakpoints);
@@ -3018,7 +3019,9 @@ int kvm_vm_ioctl(KVMState *s, int type, ...)
va_end(ap);
trace_kvm_vm_ioctl(type, arg);
+ accel_ioctl_begin();
ret = ioctl(s->vmfd, type, arg);
+ accel_ioctl_end();
if (ret == -1) {
ret = -errno;
}
@@ -3036,7 +3039,9 @@ int kvm_vcpu_ioctl(CPUState *cpu, int type, ...)
va_end(ap);
trace_kvm_vcpu_ioctl(cpu->cpu_index, type, arg);
+ accel_cpu_ioctl_begin(cpu);
ret = ioctl(cpu->kvm_fd, type, arg);
+ accel_cpu_ioctl_end(cpu);
if (ret == -1) {
ret = -errno;
}
@@ -3054,7 +3059,9 @@ int kvm_device_ioctl(int fd, int type, ...)
va_end(ap);
trace_kvm_device_ioctl(fd, type, arg);
+ accel_ioctl_begin();
ret = ioctl(fd, type, arg);
+ accel_ioctl_end();
if (ret == -1) {
ret = -errno;
}
--
2.37.3

171
SOURCES/kvm-Update-linux-headers-to-v6.0-rc4.patch Normal file
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@ -0,0 +1,171 @@
From 10fc28b61a6fba1e6dc44fd544cf31c7f313c622 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= <clg@redhat.com>
Date: Fri, 28 Oct 2022 17:48:00 +0100
Subject: [PATCH 05/42] Update linux headers to v6.0-rc4
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [5/41] ca55f497d1bf1e72179330f8f613781bf999d898
Based on upstream commit d525f73f9186a5bc641b8caf0b2c9bb94e5aa963
("Update linux headers to v6.0-rc4"), but this is focusing only on the
ZPCI and protected dump changes.
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
linux-headers/linux/kvm.h | 87 +++++++++++++++++++++++++++++++++
linux-headers/linux/vfio_zdev.h | 7 +++
2 files changed, 94 insertions(+)
diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h
index 0d05d02ee4..c65930288c 100644
--- a/linux-headers/linux/kvm.h
+++ b/linux-headers/linux/kvm.h
@@ -1150,6 +1150,9 @@ struct kvm_ppc_resize_hpt {
#define KVM_CAP_DISABLE_QUIRKS2 213
/* #define KVM_CAP_VM_TSC_CONTROL 214 */
#define KVM_CAP_SYSTEM_EVENT_DATA 215
+#define KVM_CAP_S390_PROTECTED_DUMP 217
+#define KVM_CAP_S390_ZPCI_OP 221
+#define KVM_CAP_S390_CPU_TOPOLOGY 222
#ifdef KVM_CAP_IRQ_ROUTING
@@ -1651,6 +1654,55 @@ struct kvm_s390_pv_unp {
__u64 tweak;
};
+enum pv_cmd_dmp_id {
+ KVM_PV_DUMP_INIT,
+ KVM_PV_DUMP_CONFIG_STOR_STATE,
+ KVM_PV_DUMP_COMPLETE,
+ KVM_PV_DUMP_CPU,
+};
+
+struct kvm_s390_pv_dmp {
+ __u64 subcmd;
+ __u64 buff_addr;
+ __u64 buff_len;
+ __u64 gaddr; /* For dump storage state */
+ __u64 reserved[4];
+};
+
+enum pv_cmd_info_id {
+ KVM_PV_INFO_VM,
+ KVM_PV_INFO_DUMP,
+};
+
+struct kvm_s390_pv_info_dump {
+ __u64 dump_cpu_buffer_len;
+ __u64 dump_config_mem_buffer_per_1m;
+ __u64 dump_config_finalize_len;
+};
+
+struct kvm_s390_pv_info_vm {
+ __u64 inst_calls_list[4];
+ __u64 max_cpus;
+ __u64 max_guests;
+ __u64 max_guest_addr;
+ __u64 feature_indication;
+};
+
+struct kvm_s390_pv_info_header {
+ __u32 id;
+ __u32 len_max;
+ __u32 len_written;
+ __u32 reserved;
+};
+
+struct kvm_s390_pv_info {
+ struct kvm_s390_pv_info_header header;
+ union {
+ struct kvm_s390_pv_info_dump dump;
+ struct kvm_s390_pv_info_vm vm;
+ };
+};
+
enum pv_cmd_id {
KVM_PV_ENABLE,
KVM_PV_DISABLE,
@@ -1659,6 +1711,8 @@ enum pv_cmd_id {
KVM_PV_VERIFY,
KVM_PV_PREP_RESET,
KVM_PV_UNSHARE_ALL,
+ KVM_PV_INFO,
+ KVM_PV_DUMP,
};
struct kvm_pv_cmd {
@@ -2066,4 +2120,37 @@ struct kvm_stats_desc {
/* Available with KVM_CAP_XSAVE2 */
#define KVM_GET_XSAVE2 _IOR(KVMIO, 0xcf, struct kvm_xsave)
+/* Available with KVM_CAP_S390_PROTECTED_DUMP */
+#define KVM_S390_PV_CPU_COMMAND _IOWR(KVMIO, 0xd0, struct kvm_pv_cmd)
+
+/* Available with KVM_CAP_S390_ZPCI_OP */
+#define KVM_S390_ZPCI_OP _IOW(KVMIO, 0xd1, struct kvm_s390_zpci_op)
+
+struct kvm_s390_zpci_op {
+ /* in */
+ __u32 fh; /* target device */
+ __u8 op; /* operation to perform */
+ __u8 pad[3];
+ union {
+ /* for KVM_S390_ZPCIOP_REG_AEN */
+ struct {
+ __u64 ibv; /* Guest addr of interrupt bit vector */
+ __u64 sb; /* Guest addr of summary bit */
+ __u32 flags;
+ __u32 noi; /* Number of interrupts */
+ __u8 isc; /* Guest interrupt subclass */
+ __u8 sbo; /* Offset of guest summary bit vector */
+ __u16 pad;
+ } reg_aen;
+ __u64 reserved[8];
+ } u;
+};
+
+/* types for kvm_s390_zpci_op->op */
+#define KVM_S390_ZPCIOP_REG_AEN 0
+#define KVM_S390_ZPCIOP_DEREG_AEN 1
+
+/* flags for kvm_s390_zpci_op->u.reg_aen.flags */
+#define KVM_S390_ZPCIOP_REGAEN_HOST (1 << 0)
+
#endif /* __LINUX_KVM_H */
diff --git a/linux-headers/linux/vfio_zdev.h b/linux-headers/linux/vfio_zdev.h
index b4309397b6..77f2aff1f2 100644
--- a/linux-headers/linux/vfio_zdev.h
+++ b/linux-headers/linux/vfio_zdev.h
@@ -29,6 +29,9 @@ struct vfio_device_info_cap_zpci_base {
__u16 fmb_length; /* Measurement Block Length (in bytes) */
__u8 pft; /* PCI Function Type */
__u8 gid; /* PCI function group ID */
+ /* End of version 1 */
+ __u32 fh; /* PCI function handle */
+ /* End of version 2 */
};
/**
@@ -47,6 +50,10 @@ struct vfio_device_info_cap_zpci_group {
__u16 noi; /* Maximum number of MSIs */
__u16 maxstbl; /* Maximum Store Block Length */
__u8 version; /* Supported PCI Version */
+ /* End of version 1 */
+ __u8 reserved;
+ __u16 imaxstbl; /* Maximum Interpreted Store Block Length */
+ /* End of version 2 */
};
/**
--
2.37.3

349
SOURCES/kvm-accel-introduce-accelerator-blocker-API.patch Normal file
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@ -0,0 +1,349 @@
From a5e7bb1f7a88efb5574266a76e80fd7604d19921 Mon Sep 17 00:00:00 2001
From: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Date: Mon, 16 Jan 2023 07:49:59 -0500
Subject: [PATCH 04/11] accel: introduce accelerator blocker API
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Emanuele Giuseppe Esposito <eesposit@redhat.com>
RH-MergeRequest: 247: accel: introduce accelerator blocker API
RH-Bugzilla: 2161188
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Acked-by: Vitaly Kuznetsov <vkuznets@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [1/3] 9d3d7f9554974a79042c915763288cce07aef135
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2161188
commit bd688fc93120fb3e28aa70e3dfdf567ccc1e0bc1
Author: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Date: Fri Nov 11 10:47:56 2022 -0500
accel: introduce accelerator blocker API
This API allows the accelerators to prevent vcpus from issuing
new ioctls while execting a critical section marked with the
accel_ioctl_inhibit_begin/end functions.
Note that all functions submitting ioctls must mark where the
ioctl is being called with accel_{cpu_}ioctl_begin/end().
This API requires the caller to always hold the BQL.
API documentation is in sysemu/accel-blocker.h
Internally, it uses a QemuLockCnt together with a per-CPU QemuLockCnt
(to minimize cache line bouncing) to keep avoid that new ioctls
run when the critical section starts, and a QemuEvent to wait
that all running ioctls finish.
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221111154758.1372674-2-eesposit@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Conflicts:
util/meson.build: files are missing in rhel 8.8.0
namely int128.c, memalign.c and interval-tree.c
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
---
accel/accel-blocker.c | 154 +++++++++++++++++++++++++++++++++
accel/meson.build | 2 +-
hw/core/cpu-common.c | 2 +
include/hw/core/cpu.h | 3 +
include/sysemu/accel-blocker.h | 56 ++++++++++++
util/meson.build | 2 +-
6 files changed, 217 insertions(+), 2 deletions(-)
create mode 100644 accel/accel-blocker.c
create mode 100644 include/sysemu/accel-blocker.h
diff --git a/accel/accel-blocker.c b/accel/accel-blocker.c
new file mode 100644
index 0000000000..1e7f423462
--- /dev/null
+++ b/accel/accel-blocker.c
@@ -0,0 +1,154 @@
+/*
+ * Lock to inhibit accelerator ioctls
+ *
+ * Copyright (c) 2022 Red Hat Inc.
+ *
+ * Author: Emanuele Giuseppe Esposito <eesposit@redhat.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/thread.h"
+#include "qemu/main-loop.h"
+#include "hw/core/cpu.h"
+#include "sysemu/accel-blocker.h"
+
+static QemuLockCnt accel_in_ioctl_lock;
+static QemuEvent accel_in_ioctl_event;
+
+void accel_blocker_init(void)
+{
+ qemu_lockcnt_init(&accel_in_ioctl_lock);
+ qemu_event_init(&accel_in_ioctl_event, false);
+}
+
+void accel_ioctl_begin(void)
+{
+ if (likely(qemu_mutex_iothread_locked())) {
+ return;
+ }
+
+ /* block if lock is taken in kvm_ioctl_inhibit_begin() */
+ qemu_lockcnt_inc(&accel_in_ioctl_lock);
+}
+
+void accel_ioctl_end(void)
+{
+ if (likely(qemu_mutex_iothread_locked())) {
+ return;
+ }
+
+ qemu_lockcnt_dec(&accel_in_ioctl_lock);
+ /* change event to SET. If event was BUSY, wake up all waiters */
+ qemu_event_set(&accel_in_ioctl_event);
+}
+
+void accel_cpu_ioctl_begin(CPUState *cpu)
+{
+ if (unlikely(qemu_mutex_iothread_locked())) {
+ return;
+ }
+
+ /* block if lock is taken in kvm_ioctl_inhibit_begin() */
+ qemu_lockcnt_inc(&cpu->in_ioctl_lock);
+}
+
+void accel_cpu_ioctl_end(CPUState *cpu)
+{
+ if (unlikely(qemu_mutex_iothread_locked())) {
+ return;
+ }
+
+ qemu_lockcnt_dec(&cpu->in_ioctl_lock);
+ /* change event to SET. If event was BUSY, wake up all waiters */
+ qemu_event_set(&accel_in_ioctl_event);
+}
+
+static bool accel_has_to_wait(void)
+{
+ CPUState *cpu;
+ bool needs_to_wait = false;
+
+ CPU_FOREACH(cpu) {
+ if (qemu_lockcnt_count(&cpu->in_ioctl_lock)) {
+ /* exit the ioctl, if vcpu is running it */
+ qemu_cpu_kick(cpu);
+ needs_to_wait = true;
+ }
+ }
+
+ return needs_to_wait || qemu_lockcnt_count(&accel_in_ioctl_lock);
+}
+
+void accel_ioctl_inhibit_begin(void)
+{
+ CPUState *cpu;
+
+ /*
+ * We allow to inhibit only when holding the BQL, so we can identify
+ * when an inhibitor wants to issue an ioctl easily.
+ */
+ g_assert(qemu_mutex_iothread_locked());
+
+ /* Block further invocations of the ioctls outside the BQL. */
+ CPU_FOREACH(cpu) {
+ qemu_lockcnt_lock(&cpu->in_ioctl_lock);
+ }
+ qemu_lockcnt_lock(&accel_in_ioctl_lock);
+
+ /* Keep waiting until there are running ioctls */
+ while (true) {
+
+ /* Reset event to FREE. */
+ qemu_event_reset(&accel_in_ioctl_event);
+
+ if (accel_has_to_wait()) {
+ /*
+ * If event is still FREE, and there are ioctls still in progress,
+ * wait.
+ *
+ * If an ioctl finishes before qemu_event_wait(), it will change
+ * the event state to SET. This will prevent qemu_event_wait() from
+ * blocking, but it's not a problem because if other ioctls are
+ * still running the loop will iterate once more and reset the event
+ * status to FREE so that it can wait properly.
+ *
+ * If an ioctls finishes while qemu_event_wait() is blocking, then
+ * it will be waken up, but also here the while loop makes sure
+ * to re-enter the wait if there are other running ioctls.
+ */
+ qemu_event_wait(&accel_in_ioctl_event);
+ } else {
+ /* No ioctl is running */
+ return;
+ }
+ }
+}
+
+void accel_ioctl_inhibit_end(void)
+{
+ CPUState *cpu;
+
+ qemu_lockcnt_unlock(&accel_in_ioctl_lock);
+ CPU_FOREACH(cpu) {
+ qemu_lockcnt_unlock(&cpu->in_ioctl_lock);
+ }
+}
+
diff --git a/accel/meson.build b/accel/meson.build
index dfd808d2c8..801b4d44e8 100644
--- a/accel/meson.build
+++ b/accel/meson.build
@@ -1,4 +1,4 @@
-specific_ss.add(files('accel-common.c'))
+specific_ss.add(files('accel-common.c', 'accel-blocker.c'))
softmmu_ss.add(files('accel-softmmu.c'))
user_ss.add(files('accel-user.c'))
diff --git a/hw/core/cpu-common.c b/hw/core/cpu-common.c
index 9e3241b430..b6e83acf0a 100644
--- a/hw/core/cpu-common.c
+++ b/hw/core/cpu-common.c
@@ -238,6 +238,7 @@ static void cpu_common_initfn(Object *obj)
cpu->nr_threads = 1;
qemu_mutex_init(&cpu->work_mutex);
+ qemu_lockcnt_init(&cpu->in_ioctl_lock);
QSIMPLEQ_INIT(&cpu->work_list);
QTAILQ_INIT(&cpu->breakpoints);
QTAILQ_INIT(&cpu->watchpoints);
@@ -249,6 +250,7 @@ static void cpu_common_finalize(Object *obj)
{
CPUState *cpu = CPU(obj);
+ qemu_lockcnt_destroy(&cpu->in_ioctl_lock);
qemu_mutex_destroy(&cpu->work_mutex);
}
diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h
index e948e81f1a..49d9c73f97 100644
--- a/include/hw/core/cpu.h
+++ b/include/hw/core/cpu.h
@@ -383,6 +383,9 @@ struct CPUState {
uint32_t kvm_fetch_index;
uint64_t dirty_pages;
+ /* Use by accel-block: CPU is executing an ioctl() */
+ QemuLockCnt in_ioctl_lock;
+
/* Used for events with 'vcpu' and *without* the 'disabled' properties */
DECLARE_BITMAP(trace_dstate_delayed, CPU_TRACE_DSTATE_MAX_EVENTS);
DECLARE_BITMAP(trace_dstate, CPU_TRACE_DSTATE_MAX_EVENTS);
diff --git a/include/sysemu/accel-blocker.h b/include/sysemu/accel-blocker.h
new file mode 100644
index 0000000000..72020529ef
--- /dev/null
+++ b/include/sysemu/accel-blocker.h
@@ -0,0 +1,56 @@
+/*
+ * Accelerator blocking API, to prevent new ioctls from starting and wait the
+ * running ones finish.
+ * This mechanism differs from pause/resume_all_vcpus() in that it does not
+ * release the BQL.
+ *
+ * Copyright (c) 2022 Red Hat Inc.
+ *
+ * Author: Emanuele Giuseppe Esposito <eesposit@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+#ifndef ACCEL_BLOCKER_H
+#define ACCEL_BLOCKER_H
+
+#include "qemu/osdep.h"
+#include "sysemu/cpus.h"
+
+extern void accel_blocker_init(void);
+
+/*
+ * accel_{cpu_}ioctl_begin/end:
+ * Mark when ioctl is about to run or just finished.
+ *
+ * accel_{cpu_}ioctl_begin will block after accel_ioctl_inhibit_begin() is
+ * called, preventing new ioctls to run. They will continue only after
+ * accel_ioctl_inibith_end().
+ */
+extern void accel_ioctl_begin(void);
+extern void accel_ioctl_end(void);
+extern void accel_cpu_ioctl_begin(CPUState *cpu);
+extern void accel_cpu_ioctl_end(CPUState *cpu);
+
+/*
+ * accel_ioctl_inhibit_begin: start critical section
+ *
+ * This function makes sure that:
+ * 1) incoming accel_{cpu_}ioctl_begin() calls block
+ * 2) wait that all ioctls that were already running reach
+ * accel_{cpu_}ioctl_end(), kicking vcpus if necessary.
+ *
+ * This allows the caller to access shared data or perform operations without
+ * worrying of concurrent vcpus accesses.
+ */
+extern void accel_ioctl_inhibit_begin(void);
+
+/*
+ * accel_ioctl_inhibit_end: end critical section started by
+ * accel_ioctl_inhibit_begin()
+ *
+ * This function allows blocked accel_{cpu_}ioctl_begin() to continue.
+ */
+extern void accel_ioctl_inhibit_end(void);
+
+#endif /* ACCEL_BLOCKER_H */
diff --git a/util/meson.build b/util/meson.build
index 05b593055a..b5f153b0e8 100644
--- a/util/meson.build
+++ b/util/meson.build
@@ -48,6 +48,7 @@ util_ss.add(files('transactions.c'))
util_ss.add(when: 'CONFIG_POSIX', if_true: files('drm.c'))
util_ss.add(files('guest-random.c'))
util_ss.add(files('yank.c'))
+util_ss.add(files('lockcnt.c'))
if have_user
util_ss.add(files('selfmap.c'))
@@ -69,7 +70,6 @@ if have_block
util_ss.add(files('hexdump.c'))
util_ss.add(files('iova-tree.c'))
util_ss.add(files('iov.c', 'qemu-sockets.c', 'uri.c'))
- util_ss.add(files('lockcnt.c'))
util_ss.add(files('main-loop.c'))
util_ss.add(files('nvdimm-utils.c'))
util_ss.add(files('qemu-coroutine.c', 'qemu-coroutine-lock.c', 'qemu-coroutine-io.c'))
--
2.37.3

50
SOURCES/kvm-aio-wait-switch-to-smp_mb__after_rmw.patch Normal file
View File

@ -0,0 +1,50 @@
From 953c5c0982b61b0a3f8f03452844b5487eb22fc7 Mon Sep 17 00:00:00 2001
From: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Date: Thu, 9 Mar 2023 08:13:17 -0500
Subject: [PATCH 06/13] aio-wait: switch to smp_mb__after_rmw()
RH-Author: Emanuele Giuseppe Esposito <eesposit@redhat.com>
RH-MergeRequest: 263: qatomic: add smp_mb__before/after_rmw()
RH-Bugzilla: 2168472
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Eric Auger <eric.auger@redhat.com>
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Commit: [6/10] 9f30f97754139ffd18d36b2350f9ed4e59ac496e
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2168472
commit b532526a07ef3b903ead2e055fe6cc87b41057a3
Author: Paolo Bonzini <pbonzini@redhat.com>
Date: Fri Mar 3 11:03:52 2023 +0100
aio-wait: switch to smp_mb__after_rmw()
The barrier comes after an atomic increment, so it is enough to use
smp_mb__after_rmw(); this avoids a double barrier on x86 systems.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
---
include/block/aio-wait.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/block/aio-wait.h b/include/block/aio-wait.h
index 54840f8622..03b6394c78 100644
--- a/include/block/aio-wait.h
+++ b/include/block/aio-wait.h
@@ -82,7 +82,7 @@ extern AioWait global_aio_wait;
/* Increment wait_->num_waiters before evaluating cond. */ \
qatomic_inc(&wait_->num_waiters); \
/* Paired with smp_mb in aio_wait_kick(). */ \
- smp_mb(); \
+ smp_mb__after_rmw(); \
if (ctx_ && in_aio_context_home_thread(ctx_)) { \
while ((cond)) { \
aio_poll(ctx_, true); \
--
2.37.3

86
SOURCES/kvm-aio_wait_kick-add-missing-memory-barrier.patch Normal file
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@ -0,0 +1,86 @@
From d7eae0ff4c7f7f7bf10f10272adf7c6971c0db9b Mon Sep 17 00:00:00 2001
From: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Date: Thu, 9 Mar 2023 09:26:35 -0500
Subject: [PATCH 01/13] aio_wait_kick: add missing memory barrier
RH-Author: Emanuele Giuseppe Esposito <eesposit@redhat.com>
RH-MergeRequest: 263: qatomic: add smp_mb__before/after_rmw()
RH-Bugzilla: 2168472
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Eric Auger <eric.auger@redhat.com>
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Commit: [1/10] eb774aee79864052e14e706d931e52e7bd1162c8
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2168472
commit 7455ff1aa01564cc175db5b2373e610503ad4411
Author: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Date: Tue May 24 13:30:54 2022 -0400
aio_wait_kick: add missing memory barrier
It seems that aio_wait_kick always required a memory barrier
or atomic operation in the caller, but nobody actually
took care of doing it.
Let's put the barrier in the function instead, and pair it
with another one in AIO_WAIT_WHILE. Read aio_wait_kick()
comment for further explanation.
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-Id: <20220524173054.12651-1-eesposit@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
---
include/block/aio-wait.h | 2 ++
util/aio-wait.c | 16 +++++++++++++++-
2 files changed, 17 insertions(+), 1 deletion(-)
diff --git a/include/block/aio-wait.h b/include/block/aio-wait.h
index b39eefb38d..54840f8622 100644
--- a/include/block/aio-wait.h
+++ b/include/block/aio-wait.h
@@ -81,6 +81,8 @@ extern AioWait global_aio_wait;
AioContext *ctx_ = (ctx); \
/* Increment wait_->num_waiters before evaluating cond. */ \
qatomic_inc(&wait_->num_waiters); \
+ /* Paired with smp_mb in aio_wait_kick(). */ \
+ smp_mb(); \
if (ctx_ && in_aio_context_home_thread(ctx_)) { \
while ((cond)) { \
aio_poll(ctx_, true); \
diff --git a/util/aio-wait.c b/util/aio-wait.c
index bdb3d3af22..98c5accd29 100644
--- a/util/aio-wait.c
+++ b/util/aio-wait.c
@@ -35,7 +35,21 @@ static void dummy_bh_cb(void *opaque)
void aio_wait_kick(void)
{
- /* The barrier (or an atomic op) is in the caller. */
+ /*
+ * Paired with smp_mb in AIO_WAIT_WHILE. Here we have:
+ * write(condition);
+ * aio_wait_kick() {
+ * smp_mb();
+ * read(num_waiters);
+ * }
+ *
+ * And in AIO_WAIT_WHILE:
+ * write(num_waiters);
+ * smp_mb();
+ * read(condition);
+ */
+ smp_mb();
+
if (qatomic_read(&global_aio_wait.num_waiters)) {
aio_bh_schedule_oneshot(qemu_get_aio_context(), dummy_bh_cb, NULL);
}
--
2.37.3

66
SOURCES/kvm-async-clarify-usage-of-barriers-in-the-polling-case.patch Normal file
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@ -0,0 +1,66 @@
From 187eb7a418af93375e42298d06e231e2bec3cf00 Mon Sep 17 00:00:00 2001
From: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Date: Thu, 9 Mar 2023 08:15:42 -0500
Subject: [PATCH 10/13] async: clarify usage of barriers in the polling case
RH-Author: Emanuele Giuseppe Esposito <eesposit@redhat.com>
RH-MergeRequest: 263: qatomic: add smp_mb__before/after_rmw()
RH-Bugzilla: 2168472
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Eric Auger <eric.auger@redhat.com>
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Commit: [10/10] 3be07ccc6137a0336becfe63a818d9cbadb38e9c
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2168472
commit 6229438cca037d42f44a96d38feb15cb102a444f
Author: Paolo Bonzini <pbonzini@redhat.com>
Date: Mon Mar 6 10:43:52 2023 +0100
async: clarify usage of barriers in the polling case
Explain that aio_context_notifier_poll() relies on
aio_notify_accept() to catch all the memory writes that were
done before ctx->notified was set to true.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
---
util/async.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/util/async.c b/util/async.c
index 795fe699b6..2a63bf90f2 100644
--- a/util/async.c
+++ b/util/async.c
@@ -463,8 +463,9 @@ void aio_notify_accept(AioContext *ctx)
qatomic_set(&ctx->notified, false);
/*
- * Write ctx->notified before reading e.g. bh->flags. Pairs with smp_wmb
- * in aio_notify.
+ * Order reads of ctx->notified (in aio_context_notifier_poll()) and the
+ * above clearing of ctx->notified before reads of e.g. bh->flags. Pairs
+ * with smp_wmb() in aio_notify.
*/
smp_mb();
}
@@ -487,6 +488,11 @@ static bool aio_context_notifier_poll(void *opaque)
EventNotifier *e = opaque;
AioContext *ctx = container_of(e, AioContext, notifier);
+ /*
+ * No need for load-acquire because we just want to kick the
+ * event loop. aio_notify_accept() takes care of synchronizing
+ * the event loop with the producers.
+ */
return qatomic_read(&ctx->notified);
}
--
2.37.3

111
SOURCES/kvm-async-update-documentation-of-the-memory-barriers.patch Normal file
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@ -0,0 +1,111 @@
From ea3856bb545d19499602830cdc3076d83a981e7a Mon Sep 17 00:00:00 2001
From: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Date: Thu, 9 Mar 2023 08:15:36 -0500
Subject: [PATCH 09/13] async: update documentation of the memory barriers
RH-Author: Emanuele Giuseppe Esposito <eesposit@redhat.com>
RH-MergeRequest: 263: qatomic: add smp_mb__before/after_rmw()
RH-Bugzilla: 2168472
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Eric Auger <eric.auger@redhat.com>
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Commit: [9/10] d471da2acf7a107cf75f3327c5e8d7456307160e
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2168472
commit 8dd48650b43dfde4ebea34191ac267e474bcc29e
Author: Paolo Bonzini <pbonzini@redhat.com>
Date: Mon Mar 6 10:15:06 2023 +0100
async: update documentation of the memory barriers
Ever since commit 8c6b0356b539 ("util/async: make bh_aio_poll() O(1)",
2020-02-22), synchronization between qemu_bh_schedule() and aio_bh_poll()
is happening when the bottom half is enqueued in the bh_list; not
when the flags are set. Update the documentation to match.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
---
util/async.c | 33 +++++++++++++++++++--------------
1 file changed, 19 insertions(+), 14 deletions(-)
diff --git a/util/async.c b/util/async.c
index 6f6717a34b..795fe699b6 100644
--- a/util/async.c
+++ b/util/async.c
@@ -71,14 +71,21 @@ static void aio_bh_enqueue(QEMUBH *bh, unsigned new_flags)
unsigned old_flags;
/*
- * The memory barrier implicit in qatomic_fetch_or makes sure that:
- * 1. idle & any writes needed by the callback are done before the
- * locations are read in the aio_bh_poll.
- * 2. ctx is loaded before the callback has a chance to execute and bh
- * could be freed.
+ * Synchronizes with atomic_fetch_and() in aio_bh_dequeue(), ensuring that
+ * insertion starts after BH_PENDING is set.
*/
old_flags = qatomic_fetch_or(&bh->flags, BH_PENDING | new_flags);
+
if (!(old_flags & BH_PENDING)) {
+ /*
+ * At this point the bottom half becomes visible to aio_bh_poll().
+ * This insertion thus synchronizes with QSLIST_MOVE_ATOMIC in
+ * aio_bh_poll(), ensuring that:
+ * 1. any writes needed by the callback are visible from the callback
+ * after aio_bh_dequeue() returns bh.
+ * 2. ctx is loaded before the callback has a chance to execute and bh
+ * could be freed.
+ */
QSLIST_INSERT_HEAD_ATOMIC(&ctx->bh_list, bh, next);
}
@@ -97,11 +104,8 @@ static QEMUBH *aio_bh_dequeue(BHList *head, unsigned *flags)
QSLIST_REMOVE_HEAD(head, next);
/*
- * The qatomic_and is paired with aio_bh_enqueue(). The implicit memory
- * barrier ensures that the callback sees all writes done by the scheduling
- * thread. It also ensures that the scheduling thread sees the cleared
- * flag before bh->cb has run, and thus will call aio_notify again if
- * necessary.
+ * Synchronizes with qatomic_fetch_or() in aio_bh_enqueue(), ensuring that
+ * the removal finishes before BH_PENDING is reset.
*/
*flags = qatomic_fetch_and(&bh->flags,
~(BH_PENDING | BH_SCHEDULED | BH_IDLE));
@@ -148,6 +152,7 @@ int aio_bh_poll(AioContext *ctx)
BHListSlice *s;
int ret = 0;
+ /* Synchronizes with QSLIST_INSERT_HEAD_ATOMIC in aio_bh_enqueue(). */
QSLIST_MOVE_ATOMIC(&slice.bh_list, &ctx->bh_list);
QSIMPLEQ_INSERT_TAIL(&ctx->bh_slice_list, &slice, next);
@@ -437,15 +442,15 @@ LuringState *aio_get_linux_io_uring(AioContext *ctx)
void aio_notify(AioContext *ctx)
{
/*
- * Write e.g. bh->flags before writing ctx->notified. Pairs with smp_mb in
- * aio_notify_accept.
+ * Write e.g. ctx->bh_list before writing ctx->notified. Pairs with
+ * smp_mb() in aio_notify_accept().
*/
smp_wmb();
qatomic_set(&ctx->notified, true);
/*
- * Write ctx->notified before reading ctx->notify_me. Pairs
- * with smp_mb in aio_ctx_prepare or aio_poll.
+ * Write ctx->notified (and also ctx->bh_list) before reading ctx->notify_me.
+ * Pairs with smp_mb() in aio_ctx_prepare or aio_poll.
*/
smp_mb();
if (qatomic_read(&ctx->notify_me)) {
--
2.37.3

71
SOURCES/kvm-backends-hostmem-Fix-support-of-memory-backend-memfd.patch Normal file
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@ -0,0 +1,71 @@
From 60da56e3685969493ae483c3cc2c66af13d00baf Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Wed, 10 Aug 2022 14:57:18 +0200
Subject: [PATCH 1/3] backends/hostmem: Fix support of memory-backend-memfd in
qemu_maxrampagesize()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <None>
RH-MergeRequest: 221: backends/hostmem: Fix support of memory-backend-memfd in qemu_maxrampagesize()
RH-Bugzilla: 2117149
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Commit: [1/1] b5a1047750af32c0a261b8385ea0e819eb16681a
It is currently not possible yet to use "memory-backend-memfd" on s390x
with hugepages enabled. This problem is caused by qemu_maxrampagesize()
not taking memory-backend-memfd objects into account yet, so the code
in s390_memory_init() fails to enable the huge page support there via
s390_set_max_pagesize(). Fix it by generalizing the code, so that it
looks at qemu_ram_pagesize(memdev->mr.ram_block) instead of re-trying
to get the information from the filesystem.
Suggested-by: David Hildenbrand <david@redhat.com>
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=2116496
Message-Id: <20220810125720.3849835-2-thuth@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit 8be934b70e923104da883b990dee18f02552d40e)
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2117149
[clg: Resolved conflict on qemu_real_host_page_size() ]
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
backends/hostmem.c | 14 ++------------
1 file changed, 2 insertions(+), 12 deletions(-)
diff --git a/backends/hostmem.c b/backends/hostmem.c
index 4c05862ed5..0c4654ea85 100644
--- a/backends/hostmem.c
+++ b/backends/hostmem.c
@@ -305,22 +305,12 @@ bool host_memory_backend_is_mapped(HostMemoryBackend *backend)
return backend->is_mapped;
}
-#ifdef __linux__
size_t host_memory_backend_pagesize(HostMemoryBackend *memdev)
{
- Object *obj = OBJECT(memdev);
- char *path = object_property_get_str(obj, "mem-path", NULL);
- size_t pagesize = qemu_mempath_getpagesize(path);
-
- g_free(path);
+ size_t pagesize = qemu_ram_pagesize(memdev->mr.ram_block);
+ g_assert(pagesize >= qemu_real_host_page_size);
return pagesize;
}
-#else
-size_t host_memory_backend_pagesize(HostMemoryBackend *memdev)
-{
- return qemu_real_host_page_size;
-}
-#endif
static void
host_memory_backend_memory_complete(UserCreatable *uc, Error **errp)
--
2.35.3

153
SOURCES/kvm-block-mirror-Do-not-wait-for-active-writes.patch Normal file
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@ -0,0 +1,153 @@
From 192f956f2b0761f270070555f8feb1f0544e5558 Mon Sep 17 00:00:00 2001
From: Hanna Reitz <hreitz@redhat.com>
Date: Wed, 9 Nov 2022 17:54:48 +0100
Subject: [PATCH 01/11] block/mirror: Do not wait for active writes
RH-Author: Hanna Czenczek <hreitz@redhat.com>
RH-MergeRequest: 246: block/mirror: Make active mirror progress even under full load
RH-Bugzilla: 2125119
RH-Acked-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
RH-Commit: [1/3] 652d1e55b954f13eaec2c86f58735d4942837e16
Waiting for all active writes to settle before daring to create a
background copying operation means that we will never do background
operations while the guest does anything (in write-blocking mode), and
therefore cannot converge. Yes, we also will not diverge, but actually
converging would be even nicer.
It is unclear why we did decide to wait for all active writes to settle
before creating a background operation, but it just does not seem
necessary. Active writes will put themselves into the in_flight bitmap
and thus properly block actually conflicting background requests.
It is important for active requests to wait on overlapping background
requests, which we do in active_write_prepare(). However, so far it was
not documented why it is important. Add such documentation now, and
also to the other call of mirror_wait_on_conflicts(), so that it becomes
more clear why and when requests need to actively wait for other
requests to settle.
Another thing to note is that of course we need to ensure that there are
no active requests when the job completes, but that is done by virtue of
the BDS being drained anyway, so there cannot be any active requests at
that point.
With this change, we will need to explicitly keep track of how many
bytes are in flight in active requests so that
job_progress_set_remaining() in mirror_run() can set the correct number
of remaining bytes.
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=2123297
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20221109165452.67927-2-hreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit d69a879bdf1aed586478eaa161ee064fe1b92f1a)
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
---
block/mirror.c | 37 ++++++++++++++++++++++++++++++-------
1 file changed, 30 insertions(+), 7 deletions(-)
diff --git a/block/mirror.c b/block/mirror.c
index efec2c7674..282f428cb7 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -81,6 +81,7 @@ typedef struct MirrorBlockJob {
int max_iov;
bool initial_zeroing_ongoing;
int in_active_write_counter;
+ int64_t active_write_bytes_in_flight;
bool prepared;
bool in_drain;
} MirrorBlockJob;
@@ -493,6 +494,13 @@ static uint64_t coroutine_fn mirror_iteration(MirrorBlockJob *s)
}
bdrv_dirty_bitmap_unlock(s->dirty_bitmap);
+ /*
+ * Wait for concurrent requests to @offset. The next loop will limit the
+ * copied area based on in_flight_bitmap so we only copy an area that does
+ * not overlap with concurrent in-flight requests. Still, we would like to
+ * copy something, so wait until there are at least no more requests to the
+ * very beginning of the area.
+ */
mirror_wait_on_conflicts(NULL, s, offset, 1);
job_pause_point(&s->common.job);
@@ -993,12 +1001,6 @@ static int coroutine_fn mirror_run(Job *job, Error **errp)
int64_t cnt, delta;
bool should_complete;
- /* Do not start passive operations while there are active
- * writes in progress */
- while (s->in_active_write_counter) {
- mirror_wait_for_any_operation(s, true);
- }
-
if (s->ret < 0) {
ret = s->ret;
goto immediate_exit;
@@ -1015,7 +1017,9 @@ static int coroutine_fn mirror_run(Job *job, Error **errp)
/* cnt is the number of dirty bytes remaining and s->bytes_in_flight is
* the number of bytes currently being processed; together those are
* the current remaining operation length */
- job_progress_set_remaining(&s->common.job, s->bytes_in_flight + cnt);
+ job_progress_set_remaining(&s->common.job,
+ s->bytes_in_flight + cnt +
+ s->active_write_bytes_in_flight);
/* Note that even when no rate limit is applied we need to yield
* periodically with no pending I/O so that bdrv_drain_all() returns.
@@ -1073,6 +1077,10 @@ static int coroutine_fn mirror_run(Job *job, Error **errp)
s->in_drain = true;
bdrv_drained_begin(bs);
+
+ /* Must be zero because we are drained */
+ assert(s->in_active_write_counter == 0);
+
cnt = bdrv_get_dirty_count(s->dirty_bitmap);
if (cnt > 0 || mirror_flush(s) < 0) {
bdrv_drained_end(bs);
@@ -1306,6 +1314,7 @@ do_sync_target_write(MirrorBlockJob *job, MirrorMethod method,
}
job_progress_increase_remaining(&job->common.job, bytes);
+ job->active_write_bytes_in_flight += bytes;
switch (method) {
case MIRROR_METHOD_COPY:
@@ -1327,6 +1336,7 @@ do_sync_target_write(MirrorBlockJob *job, MirrorMethod method,
abort();
}
+ job->active_write_bytes_in_flight -= bytes;
if (ret >= 0) {
job_progress_update(&job->common.job, bytes);
} else {
@@ -1375,6 +1385,19 @@ static MirrorOp *coroutine_fn active_write_prepare(MirrorBlockJob *s,
s->in_active_write_counter++;
+ /*
+ * Wait for concurrent requests affecting the area. If there are already
+ * running requests that are copying off now-to-be stale data in the area,
+ * we must wait for them to finish before we begin writing fresh data to the
+ * target so that the write operations appear in the correct order.
+ * Note that background requests (see mirror_iteration()) in contrast only
+ * wait for conflicting requests at the start of the dirty area, and then
+ * (based on the in_flight_bitmap) truncate the area to copy so it will not
+ * conflict with any requests beyond that. For active writes, however, we
+ * cannot truncate that area. The request from our parent must be blocked
+ * until the area is copied in full. Therefore, we must wait for the whole
+ * area to become free of concurrent requests.
+ */
mirror_wait_on_conflicts(op, s, offset, bytes);
bitmap_set(s->in_flight_bitmap, start_chunk, end_chunk - start_chunk);
--
2.37.3

76
SOURCES/kvm-block-mirror-Drop-mirror_wait_for_any_operation.patch Normal file
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@ -0,0 +1,76 @@
From 57c79ed20cb73aa9aa4dd7487379b85ea3f936f6 Mon Sep 17 00:00:00 2001
From: Hanna Reitz <hreitz@redhat.com>
Date: Wed, 9 Nov 2022 17:54:49 +0100
Subject: [PATCH 02/11] block/mirror: Drop mirror_wait_for_any_operation()
RH-Author: Hanna Czenczek <hreitz@redhat.com>
RH-MergeRequest: 246: block/mirror: Make active mirror progress even under full load
RH-Bugzilla: 2125119
RH-Acked-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
RH-Commit: [2/3] dec37883bcc491441ae08d9592d1ec26a47765c0
mirror_wait_for_free_in_flight_slot() is the only remaining user of
mirror_wait_for_any_operation(), so inline the latter into the former.
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20221109165452.67927-3-hreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit eb994912993077f178ccb43b20e422ecf9ae4ac7)
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
---
block/mirror.c | 21 ++++++++-------------
1 file changed, 8 insertions(+), 13 deletions(-)
diff --git a/block/mirror.c b/block/mirror.c
index 282f428cb7..6b02555ad7 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -304,19 +304,21 @@ static int mirror_cow_align(MirrorBlockJob *s, int64_t *offset,
}
static inline void coroutine_fn
-mirror_wait_for_any_operation(MirrorBlockJob *s, bool active)
+mirror_wait_for_free_in_flight_slot(MirrorBlockJob *s)
{
MirrorOp *op;
QTAILQ_FOREACH(op, &s->ops_in_flight, next) {
- /* Do not wait on pseudo ops, because it may in turn wait on
+ /*
+ * Do not wait on pseudo ops, because it may in turn wait on
* some other operation to start, which may in fact be the
* caller of this function. Since there is only one pseudo op
* at any given time, we will always find some real operation
- * to wait on. */
- if (!op->is_pseudo_op && op->is_in_flight &&
- op->is_active_write == active)
- {
+ * to wait on.
+ * Also, do not wait on active operations, because they do not
+ * use up in-flight slots.
+ */
+ if (!op->is_pseudo_op && op->is_in_flight && !op->is_active_write) {
qemu_co_queue_wait(&op->waiting_requests, NULL);
return;
}
@@ -324,13 +326,6 @@ mirror_wait_for_any_operation(MirrorBlockJob *s, bool active)
abort();
}
-static inline void coroutine_fn
-mirror_wait_for_free_in_flight_slot(MirrorBlockJob *s)
-{
- /* Only non-active operations use up in-flight slots */
- mirror_wait_for_any_operation(s, false);
-}
-
/* Perform a mirror copy operation.
*
* *op->bytes_handled is set to the number of bytes copied after and
--
2.37.3

75
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@ -0,0 +1,75 @@
From b1f5aa5a342a25dc558ee9d435fed0643fe5155f Mon Sep 17 00:00:00 2001
From: Hanna Reitz <hreitz@redhat.com>
Date: Wed, 9 Nov 2022 17:54:50 +0100
Subject: [PATCH 03/11] block/mirror: Fix NULL s->job in active writes
RH-Author: Hanna Czenczek <hreitz@redhat.com>
RH-MergeRequest: 246: block/mirror: Make active mirror progress even under full load
RH-Bugzilla: 2125119
RH-Acked-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
RH-Commit: [3/3] 49d7ebd15667151a6e14228a8260cfdd0aa27a78
There is a small gap in mirror_start_job() before putting the mirror
filter node into the block graph (bdrv_append() call) and the actual job
being created. Before the job is created, MirrorBDSOpaque.job is NULL.
It is possible that requests come in when bdrv_drained_end() is called,
and those requests would see MirrorBDSOpaque.job == NULL. Have our
filter node handle that case gracefully.
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20221109165452.67927-4-hreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit da93d5c84e56e6b4e84aa8e98b6b984c9b6bb528)
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
---
block/mirror.c | 20 ++++++++++++--------
1 file changed, 12 insertions(+), 8 deletions(-)
diff --git a/block/mirror.c b/block/mirror.c
index 6b02555ad7..50289fca49 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -1438,11 +1438,13 @@ static int coroutine_fn bdrv_mirror_top_do_write(BlockDriverState *bs,
MirrorOp *op = NULL;
MirrorBDSOpaque *s = bs->opaque;
int ret = 0;
- bool copy_to_target;
+ bool copy_to_target = false;
- copy_to_target = s->job->ret >= 0 &&
- !job_is_cancelled(&s->job->common.job) &&
- s->job->copy_mode == MIRROR_COPY_MODE_WRITE_BLOCKING;
+ if (s->job) {
+ copy_to_target = s->job->ret >= 0 &&
+ !job_is_cancelled(&s->job->common.job) &&
+ s->job->copy_mode == MIRROR_COPY_MODE_WRITE_BLOCKING;
+ }
if (copy_to_target) {
op = active_write_prepare(s->job, offset, bytes);
@@ -1487,11 +1489,13 @@ static int coroutine_fn bdrv_mirror_top_pwritev(BlockDriverState *bs,
QEMUIOVector bounce_qiov;
void *bounce_buf;
int ret = 0;
- bool copy_to_target;
+ bool copy_to_target = false;
- copy_to_target = s->job->ret >= 0 &&
- !job_is_cancelled(&s->job->common.job) &&
- s->job->copy_mode == MIRROR_COPY_MODE_WRITE_BLOCKING;
+ if (s->job) {
+ copy_to_target = s->job->ret >= 0 &&
+ !job_is_cancelled(&s->job->common.job) &&
+ s->job->copy_mode == MIRROR_COPY_MODE_WRITE_BLOCKING;
+ }
if (copy_to_target) {
/* The guest might concurrently modify the data to write; but
--
2.37.3

127
SOURCES/kvm-dma-helpers-prevent-dma_blk_cb-vs-dma_aio_cancel-rac.patch Normal file
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@ -0,0 +1,127 @@
From 103608465b8bd2edf7f9aaef5c3c93309ccf9ec2 Mon Sep 17 00:00:00 2001
From: Stefan Hajnoczi <stefanha@redhat.com>
Date: Tue, 21 Feb 2023 16:22:17 -0500
Subject: [PATCH 12/13] dma-helpers: prevent dma_blk_cb() vs dma_aio_cancel()
race
RH-Author: Stefan Hajnoczi <stefanha@redhat.com>
RH-MergeRequest: 264: scsi: protect req->aiocb with AioContext lock
RH-Bugzilla: 2090990
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
RH-Commit: [2/3] 14f5835093ba8c5111f3ada2fe87730371aca733
dma_blk_cb() only takes the AioContext lock around ->io_func(). That
means the rest of dma_blk_cb() is not protected. In particular, the
DMAAIOCB field accesses happen outside the lock.
There is a race when the main loop thread holds the AioContext lock and
invokes scsi_device_purge_requests() -> bdrv_aio_cancel() ->
dma_aio_cancel() while an IOThread executes dma_blk_cb(). The dbs->acb
field determines how cancellation proceeds. If dma_aio_cancel() sees
dbs->acb == NULL while dma_blk_cb() is still running, the request can be
completed twice (-ECANCELED and the actual return value).
The following assertion can occur with virtio-scsi when an IOThread is
used:
../hw/scsi/scsi-disk.c:368: scsi_dma_complete: Assertion `r->req.aiocb != NULL' failed.
Fix the race by holding the AioContext across dma_blk_cb(). Now
dma_aio_cancel() under the AioContext lock will not see
inconsistent/intermediate states.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20230221212218.1378734-3-stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit abfcd2760b3e70727bbc0792221b8b98a733dc32)
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
hw/scsi/scsi-disk.c | 4 +---
softmmu/dma-helpers.c | 12 +++++++-----
2 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
index 179ce22c4a..c8109a673e 100644
--- a/hw/scsi/scsi-disk.c
+++ b/hw/scsi/scsi-disk.c
@@ -351,13 +351,12 @@ done:
scsi_req_unref(&r->req);
}
+/* Called with AioContext lock held */
static void scsi_dma_complete(void *opaque, int ret)
{
SCSIDiskReq *r = (SCSIDiskReq *)opaque;
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
- aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
-
assert(r->req.aiocb != NULL);
r->req.aiocb = NULL;
@@ -367,7 +366,6 @@ static void scsi_dma_complete(void *opaque, int ret)
block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct);
}
scsi_dma_complete_noio(r, ret);
- aio_context_release(blk_get_aio_context(s->qdev.conf.blk));
}
static void scsi_read_complete_noio(SCSIDiskReq *r, int ret)
diff --git a/softmmu/dma-helpers.c b/softmmu/dma-helpers.c
index 7d766a5e89..42af18719a 100644
--- a/softmmu/dma-helpers.c
+++ b/softmmu/dma-helpers.c
@@ -127,17 +127,19 @@ static void dma_complete(DMAAIOCB *dbs, int ret)
static void dma_blk_cb(void *opaque, int ret)
{
DMAAIOCB *dbs = (DMAAIOCB *)opaque;
+ AioContext *ctx = dbs->ctx;
dma_addr_t cur_addr, cur_len;
void *mem;
trace_dma_blk_cb(dbs, ret);
+ aio_context_acquire(ctx);
dbs->acb = NULL;
dbs->offset += dbs->iov.size;
if (dbs->sg_cur_index == dbs->sg->nsg || ret < 0) {
dma_complete(dbs, ret);
- return;
+ goto out;
}
dma_blk_unmap(dbs);
@@ -177,9 +179,9 @@ static void dma_blk_cb(void *opaque, int ret)
if (dbs->iov.size == 0) {
trace_dma_map_wait(dbs);
- dbs->bh = aio_bh_new(dbs->ctx, reschedule_dma, dbs);
+ dbs->bh = aio_bh_new(ctx, reschedule_dma, dbs);
cpu_register_map_client(dbs->bh);
- return;
+ goto out;
}
if (!QEMU_IS_ALIGNED(dbs->iov.size, dbs->align)) {
@@ -187,11 +189,11 @@ static void dma_blk_cb(void *opaque, int ret)
QEMU_ALIGN_DOWN(dbs->iov.size, dbs->align));
}
- aio_context_acquire(dbs->ctx);
dbs->acb = dbs->io_func(dbs->offset, &dbs->iov,
dma_blk_cb, dbs, dbs->io_func_opaque);
- aio_context_release(dbs->ctx);
assert(dbs->acb);
+out:
+ aio_context_release(ctx);
}
static void dma_aio_cancel(BlockAIOCB *acb)
--
2.37.3

70
SOURCES/kvm-docs-system-s390x-Document-the-loadparm-machine-prop.patch Normal file
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@ -0,0 +1,70 @@
From 407e23d7f0c9020404247afe7d4df98505222bbb Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Mon, 14 Nov 2022 14:25:02 +0100
Subject: [PATCH 1/3] docs/system/s390x: Document the "loadparm" machine
property
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Thomas Huth <thuth@redhat.com>
RH-MergeRequest: 233: s390x: Document the "loadparm" machine property
RH-Bugzilla: 2128225
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Cédric Le Goater <clg@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [1/2] e9589ea32d2a8f82971476b644e1063fa14cf822
The "loadparm" machine property is useful for selecting alternative
kernels on the disk of the guest, but so far we do not tell the users
yet how to use it. Add some documentation to fill this gap.
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=2128235
Message-Id: <20221114132502.110213-1-thuth@redhat.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit be5df2edb5d69ff3107c5616aa035a9ba8d0422e)
---
docs/system/s390x/bootdevices.rst | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/docs/system/s390x/bootdevices.rst b/docs/system/s390x/bootdevices.rst
index 9e591cb9dc..d4bf3b9f0b 100644
--- a/docs/system/s390x/bootdevices.rst
+++ b/docs/system/s390x/bootdevices.rst
@@ -53,6 +53,32 @@ recommended to specify a CD-ROM device via ``-device scsi-cd`` (as mentioned
above) instead.
+Selecting kernels with the ``loadparm`` property
+------------------------------------------------
+
+The ``s390-ccw-virtio`` machine supports the so-called ``loadparm`` parameter
+which can be used to select the kernel on the disk of the guest that the
+s390-ccw bios should boot. When starting QEMU, it can be specified like this::
+
+ qemu-system-s390x -machine s390-ccw-virtio,loadparm=<string>
+
+The first way to use this parameter is to use the word ``PROMPT`` as the
+``<string>`` here. In that case the s390-ccw bios will show a list of
+installed kernels on the disk of the guest and ask the user to enter a number
+to chose which kernel should be booted -- similar to what can be achieved by
+specifying the ``-boot menu=on`` option when starting QEMU. Note that the menu
+list will only show the names of the installed kernels when using a DASD-like
+disk image with 4k byte sectors. On normal SCSI-style disks with 512-byte
+sectors, there is not enough space for the zipl loader on the disk to store
+the kernel names, so you only get a list without names here.
+
+The second way to use this parameter is to use a number in the range from 0
+to 31. The numbers that can be used here correspond to the numbers that are
+shown when using the ``PROMPT`` option, and the s390-ccw bios will then try
+to automatically boot the kernel that is associated with the given number.
+Note that ``0`` can be used to boot the default entry.
+
+
Booting from a network device
-----------------------------
--
2.37.3

356
SOURCES/kvm-dump-Add-architecture-section-and-section-string-tab.patch Normal file
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@ -0,0 +1,356 @@
From f2f3efff83dddd38a97699cd2701f46f61a732e3 Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Mon, 17 Oct 2022 11:32:10 +0000
Subject: [PATCH 36/42] dump: Add architecture section and section string table
support
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [36/41] 83b98ff185e93e62703f686b65546d60c783d783
Add hooks which architectures can use to add arbitrary data to custom
sections.
Also add a section name string table in order to identify section
contents
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20221017113210.41674-1-frankja@linux.ibm.com>
(cherry picked from commit 9b72224f44612ddd5b434a1bccf79346946d11da)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
dump/dump.c | 186 +++++++++++++++++++++++++++++++------
include/sysemu/dump-arch.h | 3 +
include/sysemu/dump.h | 3 +
3 files changed, 166 insertions(+), 26 deletions(-)
diff --git a/dump/dump.c b/dump/dump.c
index 7a42401790..4aa8fb64d2 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -104,6 +104,7 @@ static int dump_cleanup(DumpState *s)
memory_mapping_list_free(&s->list);
close(s->fd);
g_free(s->guest_note);
+ g_array_unref(s->string_table_buf);
s->guest_note = NULL;
if (s->resume) {
if (s->detached) {
@@ -153,11 +154,10 @@ static void prepare_elf64_header(DumpState *s, Elf64_Ehdr *elf_header)
elf_header->e_phoff = cpu_to_dump64(s, s->phdr_offset);
elf_header->e_phentsize = cpu_to_dump16(s, sizeof(Elf64_Phdr));
elf_header->e_phnum = cpu_to_dump16(s, phnum);
- if (s->shdr_num) {
- elf_header->e_shoff = cpu_to_dump64(s, s->shdr_offset);
- elf_header->e_shentsize = cpu_to_dump16(s, sizeof(Elf64_Shdr));
- elf_header->e_shnum = cpu_to_dump16(s, s->shdr_num);
- }
+ elf_header->e_shoff = cpu_to_dump64(s, s->shdr_offset);
+ elf_header->e_shentsize = cpu_to_dump16(s, sizeof(Elf64_Shdr));
+ elf_header->e_shnum = cpu_to_dump16(s, s->shdr_num);
+ elf_header->e_shstrndx = cpu_to_dump16(s, s->shdr_num - 1);
}
static void prepare_elf32_header(DumpState *s, Elf32_Ehdr *elf_header)
@@ -181,11 +181,10 @@ static void prepare_elf32_header(DumpState *s, Elf32_Ehdr *elf_header)
elf_header->e_phoff = cpu_to_dump32(s, s->phdr_offset);
elf_header->e_phentsize = cpu_to_dump16(s, sizeof(Elf32_Phdr));
elf_header->e_phnum = cpu_to_dump16(s, phnum);
- if (s->shdr_num) {
- elf_header->e_shoff = cpu_to_dump32(s, s->shdr_offset);
- elf_header->e_shentsize = cpu_to_dump16(s, sizeof(Elf32_Shdr));
- elf_header->e_shnum = cpu_to_dump16(s, s->shdr_num);
- }
+ elf_header->e_shoff = cpu_to_dump32(s, s->shdr_offset);
+ elf_header->e_shentsize = cpu_to_dump16(s, sizeof(Elf32_Shdr));
+ elf_header->e_shnum = cpu_to_dump16(s, s->shdr_num);
+ elf_header->e_shstrndx = cpu_to_dump16(s, s->shdr_num - 1);
}
static void write_elf_header(DumpState *s, Error **errp)
@@ -196,6 +195,8 @@ static void write_elf_header(DumpState *s, Error **errp)
void *header_ptr;
int ret;
+ /* The NULL header and the shstrtab are always defined */
+ assert(s->shdr_num >= 2);
if (dump_is_64bit(s)) {
prepare_elf64_header(s, &elf64_header);
header_size = sizeof(elf64_header);
@@ -394,17 +395,49 @@ static void prepare_elf_section_hdr_zero(DumpState *s)
}
}
-static void prepare_elf_section_hdrs(DumpState *s)
+static void prepare_elf_section_hdr_string(DumpState *s, void *buff)
+{
+ uint64_t index = s->string_table_buf->len;
+ const char strtab[] = ".shstrtab";
+ Elf32_Shdr shdr32 = {};
+ Elf64_Shdr shdr64 = {};
+ int shdr_size;
+ void *shdr;
+
+ g_array_append_vals(s->string_table_buf, strtab, sizeof(strtab));
+ if (dump_is_64bit(s)) {
+ shdr_size = sizeof(Elf64_Shdr);
+ shdr64.sh_type = SHT_STRTAB;
+ shdr64.sh_offset = s->section_offset + s->elf_section_data_size;
+ shdr64.sh_name = index;
+ shdr64.sh_size = s->string_table_buf->len;
+ shdr = &shdr64;
+ } else {
+ shdr_size = sizeof(Elf32_Shdr);
+ shdr32.sh_type = SHT_STRTAB;
+ shdr32.sh_offset = s->section_offset + s->elf_section_data_size;
+ shdr32.sh_name = index;
+ shdr32.sh_size = s->string_table_buf->len;
+ shdr = &shdr32;
+ }
+ memcpy(buff, shdr, shdr_size);
+}
+
+static bool prepare_elf_section_hdrs(DumpState *s, Error **errp)
{
size_t len, sizeof_shdr;
+ void *buff_hdr;
/*
* Section ordering:
* - HDR zero
+ * - Arch section hdrs
+ * - String table hdr
*/
sizeof_shdr = dump_is_64bit(s) ? sizeof(Elf64_Shdr) : sizeof(Elf32_Shdr);
len = sizeof_shdr * s->shdr_num;
s->elf_section_hdrs = g_malloc0(len);
+ buff_hdr = s->elf_section_hdrs;
/*
* The first section header is ALWAYS a special initial section
@@ -420,6 +453,26 @@ static void prepare_elf_section_hdrs(DumpState *s)
if (s->phdr_num >= PN_XNUM) {
prepare_elf_section_hdr_zero(s);
}
+ buff_hdr += sizeof_shdr;
+
+ /* Add architecture defined section headers */
+ if (s->dump_info.arch_sections_write_hdr_fn
+ && s->shdr_num > 2) {
+ buff_hdr += s->dump_info.arch_sections_write_hdr_fn(s, buff_hdr);
+
+ if (s->shdr_num >= SHN_LORESERVE) {
+ error_setg_errno(errp, EINVAL,
+ "dump: too many architecture defined sections");
+ return false;
+ }
+ }
+
+ /*
+ * String table is the last section since strings are added via
+ * arch_sections_write_hdr().
+ */
+ prepare_elf_section_hdr_string(s, buff_hdr);
+ return true;
}
static void write_elf_section_headers(DumpState *s, Error **errp)
@@ -427,7 +480,9 @@ static void write_elf_section_headers(DumpState *s, Error **errp)
size_t sizeof_shdr = dump_is_64bit(s) ? sizeof(Elf64_Shdr) : sizeof(Elf32_Shdr);
int ret;
- prepare_elf_section_hdrs(s);
+ if (!prepare_elf_section_hdrs(s, errp)) {
+ return;
+ }
ret = fd_write_vmcore(s->elf_section_hdrs, s->shdr_num * sizeof_shdr, s);
if (ret < 0) {
@@ -437,6 +492,29 @@ static void write_elf_section_headers(DumpState *s, Error **errp)
g_free(s->elf_section_hdrs);
}
+static void write_elf_sections(DumpState *s, Error **errp)
+{
+ int ret;
+
+ if (s->elf_section_data_size) {
+ /* Write architecture section data */
+ ret = fd_write_vmcore(s->elf_section_data,
+ s->elf_section_data_size, s);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret,
+ "dump: failed to write architecture section data");
+ return;
+ }
+ }
+
+ /* Write string table */
+ ret = fd_write_vmcore(s->string_table_buf->data,
+ s->string_table_buf->len, s);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret, "dump: failed to write string table data");
+ }
+}
+
static void write_data(DumpState *s, void *buf, int length, Error **errp)
{
int ret;
@@ -693,6 +771,31 @@ static void dump_iterate(DumpState *s, Error **errp)
}
}
+static void dump_end(DumpState *s, Error **errp)
+{
+ int rc;
+ ERRP_GUARD();
+
+ if (s->elf_section_data_size) {
+ s->elf_section_data = g_malloc0(s->elf_section_data_size);
+ }
+
+ /* Adds the architecture defined section data to s->elf_section_data */
+ if (s->dump_info.arch_sections_write_fn &&
+ s->elf_section_data_size) {
+ rc = s->dump_info.arch_sections_write_fn(s, s->elf_section_data);
+ if (rc) {
+ error_setg_errno(errp, rc,
+ "dump: failed to get arch section data");
+ g_free(s->elf_section_data);
+ return;
+ }
+ }
+
+ /* write sections to vmcore */
+ write_elf_sections(s, errp);
+}
+
static void create_vmcore(DumpState *s, Error **errp)
{
ERRP_GUARD();
@@ -702,7 +805,14 @@ static void create_vmcore(DumpState *s, Error **errp)
return;
}
+ /* Iterate over memory and dump it to file */
dump_iterate(s, errp);
+ if (*errp) {
+ return;
+ }
+
+ /* Write the section data */
+ dump_end(s, errp);
}
static int write_start_flat_header(int fd)
@@ -1720,6 +1830,14 @@ static void dump_init(DumpState *s, int fd, bool has_format,
s->filter_area_begin = begin;
s->filter_area_length = length;
+ /* First index is 0, it's the special null name */
+ s->string_table_buf = g_array_new(FALSE, TRUE, 1);
+ /*
+ * Allocate the null name, due to the clearing option set to true
+ * it will be 0.
+ */
+ g_array_set_size(s->string_table_buf, 1);
+
memory_mapping_list_init(&s->list);
guest_phys_blocks_init(&s->guest_phys_blocks);
@@ -1856,26 +1974,42 @@ static void dump_init(DumpState *s, int fd, bool has_format,
}
/*
- * calculate phdr_num
+ * The first section header is always a special one in which most
+ * fields are 0. The section header string table is also always
+ * set.
+ */
+ s->shdr_num = 2;
+
+ /*
+ * Adds the number of architecture sections to shdr_num and sets
+ * elf_section_data_size so we know the offsets and sizes of all
+ * parts.
+ */
+ if (s->dump_info.arch_sections_add_fn) {
+ s->dump_info.arch_sections_add_fn(s);
+ }
+
+ /*
+ * calculate shdr_num so we know the offsets and sizes of all
+ * parts.
+ * Calculate phdr_num
*
- * the type of ehdr->e_phnum is uint16_t, so we should avoid overflow
+ * The absolute maximum amount of phdrs is UINT32_MAX - 1 as
+ * sh_info is 32 bit. There's special handling once we go over
+ * UINT16_MAX - 1 but that is handled in the ehdr and section
+ * code.
*/
- s->phdr_num = 1; /* PT_NOTE */
- if (s->list.num < UINT16_MAX - 2) {
- s->shdr_num = 0;
+ s->phdr_num = 1; /* Reserve PT_NOTE */
+ if (s->list.num <= UINT32_MAX - 1) {
s->phdr_num += s->list.num;
} else {
- /* sh_info of section 0 holds the real number of phdrs */
- s->shdr_num = 1;
-
- /* the type of shdr->sh_info is uint32_t, so we should avoid overflow */
- if (s->list.num <= UINT32_MAX - 1) {
- s->phdr_num += s->list.num;
- } else {
- s->phdr_num = UINT32_MAX;
- }
+ s->phdr_num = UINT32_MAX;
}
+ /*
+ * Now that the number of section and program headers is known we
+ * can calculate the offsets of the headers and data.
+ */
if (dump_is_64bit(s)) {
s->shdr_offset = sizeof(Elf64_Ehdr);
s->phdr_offset = s->shdr_offset + sizeof(Elf64_Shdr) * s->shdr_num;
diff --git a/include/sysemu/dump-arch.h b/include/sysemu/dump-arch.h
index e25b02e990..59bbc9be38 100644
--- a/include/sysemu/dump-arch.h
+++ b/include/sysemu/dump-arch.h
@@ -21,6 +21,9 @@ typedef struct ArchDumpInfo {
uint32_t page_size; /* The target's page size. If it's variable and
* unknown, then this should be the maximum. */
uint64_t phys_base; /* The target's physmem base. */
+ void (*arch_sections_add_fn)(DumpState *s);
+ uint64_t (*arch_sections_write_hdr_fn)(DumpState *s, uint8_t *buff);
+ int (*arch_sections_write_fn)(DumpState *s, uint8_t *buff);
} ArchDumpInfo;
struct GuestPhysBlockList; /* memory_mapping.h */
diff --git a/include/sysemu/dump.h b/include/sysemu/dump.h
index 9ed811b313..38ccac7190 100644
--- a/include/sysemu/dump.h
+++ b/include/sysemu/dump.h
@@ -180,6 +180,9 @@ typedef struct DumpState {
hwaddr note_offset;
void *elf_section_hdrs; /* Pointer to section header buffer */
+ void *elf_section_data; /* Pointer to section data buffer */
+ uint64_t elf_section_data_size; /* Size of section data */
+ GArray *string_table_buf; /* String table data buffer */
uint8_t *note_buf; /* buffer for notes */
size_t note_buf_offset; /* the writing place in note_buf */
--
2.37.3

138
SOURCES/kvm-dump-Add-more-offset-variables.patch Normal file
View File

@ -0,0 +1,138 @@
From bee31226b87d0b05faae84e88cce3af1b8dabbfd Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Wed, 30 Mar 2022 12:35:59 +0000
Subject: [PATCH 17/42] dump: Add more offset variables
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [17/41] fbe629e1476e8a0e039f989af6e1f4707075ba01
Offset calculations are easy enough to get wrong. Let's add a few
variables to make moving around elf headers and data sections easier.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220330123603.107120-6-frankja@linux.ibm.com>
(cherry picked from commit e71d353360bb09a8e784e35d78370c691f6ea185)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
dump/dump.c | 35 +++++++++++++++--------------------
include/sysemu/dump.h | 4 ++++
2 files changed, 19 insertions(+), 20 deletions(-)
diff --git a/dump/dump.c b/dump/dump.c
index 5cc2322325..85a402b38c 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -142,13 +142,11 @@ static void write_elf64_header(DumpState *s, Error **errp)
elf_header.e_machine = cpu_to_dump16(s, s->dump_info.d_machine);
elf_header.e_version = cpu_to_dump32(s, EV_CURRENT);
elf_header.e_ehsize = cpu_to_dump16(s, sizeof(elf_header));
- elf_header.e_phoff = cpu_to_dump64(s, sizeof(Elf64_Ehdr));
+ elf_header.e_phoff = cpu_to_dump64(s, s->phdr_offset);
elf_header.e_phentsize = cpu_to_dump16(s, sizeof(Elf64_Phdr));
elf_header.e_phnum = cpu_to_dump16(s, phnum);
if (s->shdr_num) {
- uint64_t shoff = sizeof(Elf64_Ehdr) + sizeof(Elf64_Phdr) * s->phdr_num;
-
- elf_header.e_shoff = cpu_to_dump64(s, shoff);
+ elf_header.e_shoff = cpu_to_dump64(s, s->shdr_offset);
elf_header.e_shentsize = cpu_to_dump16(s, sizeof(Elf64_Shdr));
elf_header.e_shnum = cpu_to_dump16(s, s->shdr_num);
}
@@ -179,13 +177,11 @@ static void write_elf32_header(DumpState *s, Error **errp)
elf_header.e_machine = cpu_to_dump16(s, s->dump_info.d_machine);
elf_header.e_version = cpu_to_dump32(s, EV_CURRENT);
elf_header.e_ehsize = cpu_to_dump16(s, sizeof(elf_header));
- elf_header.e_phoff = cpu_to_dump32(s, sizeof(Elf32_Ehdr));
+ elf_header.e_phoff = cpu_to_dump32(s, s->phdr_offset);
elf_header.e_phentsize = cpu_to_dump16(s, sizeof(Elf32_Phdr));
elf_header.e_phnum = cpu_to_dump16(s, phnum);
if (s->shdr_num) {
- uint32_t shoff = sizeof(Elf32_Ehdr) + sizeof(Elf32_Phdr) * s->phdr_num;
-
- elf_header.e_shoff = cpu_to_dump32(s, shoff);
+ elf_header.e_shoff = cpu_to_dump32(s, s->shdr_offset);
elf_header.e_shentsize = cpu_to_dump16(s, sizeof(Elf32_Shdr));
elf_header.e_shnum = cpu_to_dump16(s, s->shdr_num);
}
@@ -248,12 +244,11 @@ static void write_elf32_load(DumpState *s, MemoryMapping *memory_mapping,
static void write_elf64_note(DumpState *s, Error **errp)
{
Elf64_Phdr phdr;
- hwaddr begin = s->memory_offset - s->note_size;
int ret;
memset(&phdr, 0, sizeof(Elf64_Phdr));
phdr.p_type = cpu_to_dump32(s, PT_NOTE);
- phdr.p_offset = cpu_to_dump64(s, begin);
+ phdr.p_offset = cpu_to_dump64(s, s->note_offset);
phdr.p_paddr = 0;
phdr.p_filesz = cpu_to_dump64(s, s->note_size);
phdr.p_memsz = cpu_to_dump64(s, s->note_size);
@@ -313,13 +308,12 @@ static void write_elf64_notes(WriteCoreDumpFunction f, DumpState *s,
static void write_elf32_note(DumpState *s, Error **errp)
{
- hwaddr begin = s->memory_offset - s->note_size;
Elf32_Phdr phdr;
int ret;
memset(&phdr, 0, sizeof(Elf32_Phdr));
phdr.p_type = cpu_to_dump32(s, PT_NOTE);
- phdr.p_offset = cpu_to_dump32(s, begin);
+ phdr.p_offset = cpu_to_dump32(s, s->note_offset);
phdr.p_paddr = 0;
phdr.p_filesz = cpu_to_dump32(s, s->note_size);
phdr.p_memsz = cpu_to_dump32(s, s->note_size);
@@ -1826,15 +1820,16 @@ static void dump_init(DumpState *s, int fd, bool has_format,
}
if (s->dump_info.d_class == ELFCLASS64) {
- s->memory_offset = sizeof(Elf64_Ehdr) +
- sizeof(Elf64_Phdr) * s->phdr_num +
- sizeof(Elf64_Shdr) * s->shdr_num +
- s->note_size;
+ s->phdr_offset = sizeof(Elf64_Ehdr);
+ s->shdr_offset = s->phdr_offset + sizeof(Elf64_Phdr) * s->phdr_num;
+ s->note_offset = s->shdr_offset + sizeof(Elf64_Shdr) * s->shdr_num;
+ s->memory_offset = s->note_offset + s->note_size;
} else {
- s->memory_offset = sizeof(Elf32_Ehdr) +
- sizeof(Elf32_Phdr) * s->phdr_num +
- sizeof(Elf32_Shdr) * s->shdr_num +
- s->note_size;
+
+ s->phdr_offset = sizeof(Elf32_Ehdr);
+ s->shdr_offset = s->phdr_offset + sizeof(Elf32_Phdr) * s->phdr_num;
+ s->note_offset = s->shdr_offset + sizeof(Elf32_Shdr) * s->shdr_num;
+ s->memory_offset = s->note_offset + s->note_size;
}
return;
diff --git a/include/sysemu/dump.h b/include/sysemu/dump.h
index 19458bffbd..ffc2ea1072 100644
--- a/include/sysemu/dump.h
+++ b/include/sysemu/dump.h
@@ -159,6 +159,10 @@ typedef struct DumpState {
bool resume;
bool detached;
ssize_t note_size;
+ hwaddr shdr_offset;
+ hwaddr phdr_offset;
+ hwaddr section_offset;
+ hwaddr note_offset;
hwaddr memory_offset;
int fd;
--
2.37.3

94
SOURCES/kvm-dump-Cleanup-dump_begin-write-functions.patch Normal file
View File

@ -0,0 +1,94 @@
From cbb653d73e32513ccd46b293a52384eed6a5f84f Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Wed, 30 Mar 2022 12:36:02 +0000
Subject: [PATCH 20/42] dump: Cleanup dump_begin write functions
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [20/41] 18ea1457a3e54fd368e556d96c3be50c6ad0a6bd
There's no need to have a gigantic if in there let's move the elf
32/64 bit logic into the section, segment or note code.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220330123603.107120-9-frankja@linux.ibm.com>
(cherry picked from commit 5ff2e5a3e1e67930e523486e39549a33fcf97227)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
dump/dump.c | 42 +++++++++++-------------------------------
1 file changed, 11 insertions(+), 31 deletions(-)
diff --git a/dump/dump.c b/dump/dump.c
index 823ca32883..88abde355a 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -565,46 +565,26 @@ static void dump_begin(DumpState *s, Error **errp)
return;
}
- if (dump_is_64bit(s)) {
- /* write all PT_LOAD to vmcore */
- write_elf_loads(s, errp);
+ /* write all PT_LOAD to vmcore */
+ write_elf_loads(s, errp);
+ if (*errp) {
+ return;
+ }
+
+ /* write section to vmcore */
+ if (s->shdr_num) {
+ write_elf_section(s, 1, errp);
if (*errp) {
return;
}
+ }
- /* write section to vmcore */
- if (s->shdr_num) {
- write_elf_section(s, 1, errp);
- if (*errp) {
- return;
- }
- }
-
+ if (dump_is_64bit(s)) {
/* write notes to vmcore */
write_elf64_notes(fd_write_vmcore, s, errp);
- if (*errp) {
- return;
- }
} else {
- /* write all PT_LOAD to vmcore */
- write_elf_loads(s, errp);
- if (*errp) {
- return;
- }
-
- /* write section to vmcore */
- if (s->shdr_num) {
- write_elf_section(s, 0, errp);
- if (*errp) {
- return;
- }
- }
-
/* write notes to vmcore */
write_elf32_notes(fd_write_vmcore, s, errp);
- if (*errp) {
- return;
- }
}
}
--
2.37.3

67
SOURCES/kvm-dump-Consolidate-elf-note-function.patch Normal file
View File

@ -0,0 +1,67 @@
From 0547599cf507930f91943f22d5f917ebacf69484 Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Wed, 30 Mar 2022 12:36:03 +0000
Subject: [PATCH 21/42] dump: Consolidate elf note function
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [21/41] 52298c098c116aea75ad15894731ff412c2c4e73
Just like with the other write functions let's move the 32/64 bit elf
handling to a function to improve readability.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220330123603.107120-10-frankja@linux.ibm.com>
(cherry picked from commit c68124738bc29017e4254c898bc40be7be477af7)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
dump/dump.c | 18 +++++++++++-------
1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/dump/dump.c b/dump/dump.c
index 88abde355a..a451abc590 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -520,6 +520,15 @@ static void write_elf_loads(DumpState *s, Error **errp)
}
}
+static void write_elf_notes(DumpState *s, Error **errp)
+{
+ if (dump_is_64bit(s)) {
+ write_elf64_notes(fd_write_vmcore, s, errp);
+ } else {
+ write_elf32_notes(fd_write_vmcore, s, errp);
+ }
+}
+
/* write elf header, PT_NOTE and elf note to vmcore. */
static void dump_begin(DumpState *s, Error **errp)
{
@@ -579,13 +588,8 @@ static void dump_begin(DumpState *s, Error **errp)
}
}
- if (dump_is_64bit(s)) {
- /* write notes to vmcore */
- write_elf64_notes(fd_write_vmcore, s, errp);
- } else {
- /* write notes to vmcore */
- write_elf32_notes(fd_write_vmcore, s, errp);
- }
+ /* write notes to vmcore */
+ write_elf_notes(s, errp);
}
static int get_next_block(DumpState *s, GuestPhysBlock *block)
--
2.37.3

169
SOURCES/kvm-dump-Consolidate-phdr-note-writes.patch Normal file
View File

@ -0,0 +1,169 @@
From f87abe1ef14e80731249ebe9fe1bea569a68e9b4 Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Wed, 30 Mar 2022 12:36:01 +0000
Subject: [PATCH 19/42] dump: Consolidate phdr note writes
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [19/41] 180c4c0ab4941a0bf366dc7f32ee035e03daa6c0
There's no need to have two write functions. Let's rather have two
functions that set the data for elf 32/64 and then write it in a
common function.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220330123603.107120-8-frankja@linux.ibm.com>
(cherry picked from commit bc7d558017e6700f9a05c61b0b638a8994945f0d)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
dump/dump.c | 94 +++++++++++++++++++++++++++--------------------------
1 file changed, 48 insertions(+), 46 deletions(-)
diff --git a/dump/dump.c b/dump/dump.c
index 6394e94023..823ca32883 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -246,24 +246,15 @@ static void write_elf32_load(DumpState *s, MemoryMapping *memory_mapping,
}
}
-static void write_elf64_note(DumpState *s, Error **errp)
+static void write_elf64_phdr_note(DumpState *s, Elf64_Phdr *phdr)
{
- Elf64_Phdr phdr;
- int ret;
-
- memset(&phdr, 0, sizeof(Elf64_Phdr));
- phdr.p_type = cpu_to_dump32(s, PT_NOTE);
- phdr.p_offset = cpu_to_dump64(s, s->note_offset);
- phdr.p_paddr = 0;
- phdr.p_filesz = cpu_to_dump64(s, s->note_size);
- phdr.p_memsz = cpu_to_dump64(s, s->note_size);
- phdr.p_vaddr = 0;
-
- ret = fd_write_vmcore(&phdr, sizeof(Elf64_Phdr), s);
- if (ret < 0) {
- error_setg_errno(errp, -ret,
- "dump: failed to write program header table");
- }
+ memset(phdr, 0, sizeof(*phdr));
+ phdr->p_type = cpu_to_dump32(s, PT_NOTE);
+ phdr->p_offset = cpu_to_dump64(s, s->note_offset);
+ phdr->p_paddr = 0;
+ phdr->p_filesz = cpu_to_dump64(s, s->note_size);
+ phdr->p_memsz = cpu_to_dump64(s, s->note_size);
+ phdr->p_vaddr = 0;
}
static inline int cpu_index(CPUState *cpu)
@@ -311,24 +302,15 @@ static void write_elf64_notes(WriteCoreDumpFunction f, DumpState *s,
write_guest_note(f, s, errp);
}
-static void write_elf32_note(DumpState *s, Error **errp)
+static void write_elf32_phdr_note(DumpState *s, Elf32_Phdr *phdr)
{
- Elf32_Phdr phdr;
- int ret;
-
- memset(&phdr, 0, sizeof(Elf32_Phdr));
- phdr.p_type = cpu_to_dump32(s, PT_NOTE);
- phdr.p_offset = cpu_to_dump32(s, s->note_offset);
- phdr.p_paddr = 0;
- phdr.p_filesz = cpu_to_dump32(s, s->note_size);
- phdr.p_memsz = cpu_to_dump32(s, s->note_size);
- phdr.p_vaddr = 0;
-
- ret = fd_write_vmcore(&phdr, sizeof(Elf32_Phdr), s);
- if (ret < 0) {
- error_setg_errno(errp, -ret,
- "dump: failed to write program header table");
- }
+ memset(phdr, 0, sizeof(*phdr));
+ phdr->p_type = cpu_to_dump32(s, PT_NOTE);
+ phdr->p_offset = cpu_to_dump32(s, s->note_offset);
+ phdr->p_paddr = 0;
+ phdr->p_filesz = cpu_to_dump32(s, s->note_size);
+ phdr->p_memsz = cpu_to_dump32(s, s->note_size);
+ phdr->p_vaddr = 0;
}
static void write_elf32_notes(WriteCoreDumpFunction f, DumpState *s,
@@ -358,6 +340,32 @@ static void write_elf32_notes(WriteCoreDumpFunction f, DumpState *s,
write_guest_note(f, s, errp);
}
+static void write_elf_phdr_note(DumpState *s, Error **errp)
+{
+ ERRP_GUARD();
+ Elf32_Phdr phdr32;
+ Elf64_Phdr phdr64;
+ void *phdr;
+ size_t size;
+ int ret;
+
+ if (dump_is_64bit(s)) {
+ write_elf64_phdr_note(s, &phdr64);
+ size = sizeof(phdr64);
+ phdr = &phdr64;
+ } else {
+ write_elf32_phdr_note(s, &phdr32);
+ size = sizeof(phdr32);
+ phdr = &phdr32;
+ }
+
+ ret = fd_write_vmcore(phdr, size, s);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret,
+ "dump: failed to write program header table");
+ }
+}
+
static void write_elf_section(DumpState *s, int type, Error **errp)
{
Elf32_Shdr shdr32;
@@ -551,13 +559,13 @@ static void dump_begin(DumpState *s, Error **errp)
return;
}
- if (dump_is_64bit(s)) {
- /* write PT_NOTE to vmcore */
- write_elf64_note(s, errp);
- if (*errp) {
- return;
- }
+ /* write PT_NOTE to vmcore */
+ write_elf_phdr_note(s, errp);
+ if (*errp) {
+ return;
+ }
+ if (dump_is_64bit(s)) {
/* write all PT_LOAD to vmcore */
write_elf_loads(s, errp);
if (*errp) {
@@ -578,12 +586,6 @@ static void dump_begin(DumpState *s, Error **errp)
return;
}
} else {
- /* write PT_NOTE to vmcore */
- write_elf32_note(s, errp);
- if (*errp) {
- return;
- }
-
/* write all PT_LOAD to vmcore */
write_elf_loads(s, errp);
if (*errp) {
--
2.37.3

118
SOURCES/kvm-dump-Introduce-dump_is_64bit-helper-function.patch Normal file
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@ -0,0 +1,118 @@
From c851676d202b5b76962529f3b6d433936becbd8a Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Wed, 30 Mar 2022 12:36:00 +0000
Subject: [PATCH 18/42] dump: Introduce dump_is_64bit() helper function
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [18/41] a0fd2d1985c61b8e50d4a7ca26bc0ee6fcaa6196
Checking d_class in dump_info leads to lengthy conditionals so let's
shorten things a bit by introducing a helper function.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220330123603.107120-7-frankja@linux.ibm.com>
(cherry picked from commit 05bbaa5040ccb3419e8b93af8040485430e2db42)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
dump/dump.c | 25 +++++++++++++++----------
1 file changed, 15 insertions(+), 10 deletions(-)
diff --git a/dump/dump.c b/dump/dump.c
index 85a402b38c..6394e94023 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -55,6 +55,11 @@ static Error *dump_migration_blocker;
DIV_ROUND_UP((name_size), 4) + \
DIV_ROUND_UP((desc_size), 4)) * 4)
+static inline bool dump_is_64bit(DumpState *s)
+{
+ return s->dump_info.d_class == ELFCLASS64;
+}
+
uint16_t cpu_to_dump16(DumpState *s, uint16_t val)
{
if (s->dump_info.d_endian == ELFDATA2LSB) {
@@ -489,7 +494,7 @@ static void write_elf_loads(DumpState *s, Error **errp)
get_offset_range(memory_mapping->phys_addr,
memory_mapping->length,
s, &offset, &filesz);
- if (s->dump_info.d_class == ELFCLASS64) {
+ if (dump_is_64bit(s)) {
write_elf64_load(s, memory_mapping, phdr_index++, offset,
filesz, errp);
} else {
@@ -537,7 +542,7 @@ static void dump_begin(DumpState *s, Error **errp)
*/
/* write elf header to vmcore */
- if (s->dump_info.d_class == ELFCLASS64) {
+ if (dump_is_64bit(s)) {
write_elf64_header(s, errp);
} else {
write_elf32_header(s, errp);
@@ -546,7 +551,7 @@ static void dump_begin(DumpState *s, Error **errp)
return;
}
- if (s->dump_info.d_class == ELFCLASS64) {
+ if (dump_is_64bit(s)) {
/* write PT_NOTE to vmcore */
write_elf64_note(s, errp);
if (*errp) {
@@ -757,7 +762,7 @@ static void get_note_sizes(DumpState *s, const void *note,
uint64_t name_sz;
uint64_t desc_sz;
- if (s->dump_info.d_class == ELFCLASS64) {
+ if (dump_is_64bit(s)) {
const Elf64_Nhdr *hdr = note;
note_head_sz = sizeof(Elf64_Nhdr);
name_sz = tswap64(hdr->n_namesz);
@@ -1017,10 +1022,10 @@ out:
static void write_dump_header(DumpState *s, Error **errp)
{
- if (s->dump_info.d_class == ELFCLASS32) {
- create_header32(s, errp);
- } else {
+ if (dump_is_64bit(s)) {
create_header64(s, errp);
+ } else {
+ create_header32(s, errp);
}
}
@@ -1715,8 +1720,8 @@ static void dump_init(DumpState *s, int fd, bool has_format,
uint32_t size;
uint16_t format;
- note_head_size = s->dump_info.d_class == ELFCLASS32 ?
- sizeof(Elf32_Nhdr) : sizeof(Elf64_Nhdr);
+ note_head_size = dump_is_64bit(s) ?
+ sizeof(Elf64_Nhdr) : sizeof(Elf32_Nhdr);
format = le16_to_cpu(vmci->vmcoreinfo.guest_format);
size = le32_to_cpu(vmci->vmcoreinfo.size);
@@ -1819,7 +1824,7 @@ static void dump_init(DumpState *s, int fd, bool has_format,
}
}
- if (s->dump_info.d_class == ELFCLASS64) {
+ if (dump_is_64bit(s)) {
s->phdr_offset = sizeof(Elf64_Ehdr);
s->shdr_offset = s->phdr_offset + sizeof(Elf64_Phdr) * s->phdr_num;
s->note_offset = s->shdr_offset + sizeof(Elf64_Shdr) * s->shdr_num;
--
2.37.3

136
SOURCES/kvm-dump-Introduce-shdr_num-to-decrease-complexity.patch Normal file
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@ -0,0 +1,136 @@
From 255722667a4fa4d522bb0b7e0825cbbe635abb8d Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Wed, 30 Mar 2022 12:35:57 +0000
Subject: [PATCH 15/42] dump: Introduce shdr_num to decrease complexity
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [15/41] b0215ea5d381ef7f6abfe3f3bafea51ce933da56
Let's move from a boolean to a int variable which will later enable us
to store the number of sections that are in the dump file.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220330123603.107120-4-frankja@linux.ibm.com>
(cherry picked from commit 862a395858e5a302ed5921487777acdc95a3a31b)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
dump/dump.c | 24 ++++++++++++------------
include/sysemu/dump.h | 2 +-
2 files changed, 13 insertions(+), 13 deletions(-)
diff --git a/dump/dump.c b/dump/dump.c
index 7236b167cc..972e28b089 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -145,12 +145,12 @@ static void write_elf64_header(DumpState *s, Error **errp)
elf_header.e_phoff = cpu_to_dump64(s, sizeof(Elf64_Ehdr));
elf_header.e_phentsize = cpu_to_dump16(s, sizeof(Elf64_Phdr));
elf_header.e_phnum = cpu_to_dump16(s, phnum);
- if (s->have_section) {
+ if (s->shdr_num) {
uint64_t shoff = sizeof(Elf64_Ehdr) + sizeof(Elf64_Phdr) * s->phdr_num;
elf_header.e_shoff = cpu_to_dump64(s, shoff);
elf_header.e_shentsize = cpu_to_dump16(s, sizeof(Elf64_Shdr));
- elf_header.e_shnum = cpu_to_dump16(s, 1);
+ elf_header.e_shnum = cpu_to_dump16(s, s->shdr_num);
}
ret = fd_write_vmcore(&elf_header, sizeof(elf_header), s);
@@ -182,12 +182,12 @@ static void write_elf32_header(DumpState *s, Error **errp)
elf_header.e_phoff = cpu_to_dump32(s, sizeof(Elf32_Ehdr));
elf_header.e_phentsize = cpu_to_dump16(s, sizeof(Elf32_Phdr));
elf_header.e_phnum = cpu_to_dump16(s, phnum);
- if (s->have_section) {
+ if (s->shdr_num) {
uint32_t shoff = sizeof(Elf32_Ehdr) + sizeof(Elf32_Phdr) * s->phdr_num;
elf_header.e_shoff = cpu_to_dump32(s, shoff);
elf_header.e_shentsize = cpu_to_dump16(s, sizeof(Elf32_Shdr));
- elf_header.e_shnum = cpu_to_dump16(s, 1);
+ elf_header.e_shnum = cpu_to_dump16(s, s->shdr_num);
}
ret = fd_write_vmcore(&elf_header, sizeof(elf_header), s);
@@ -566,7 +566,7 @@ static void dump_begin(DumpState *s, Error **errp)
}
/* write section to vmcore */
- if (s->have_section) {
+ if (s->shdr_num) {
write_elf_section(s, 1, errp);
if (*errp) {
return;
@@ -592,7 +592,7 @@ static void dump_begin(DumpState *s, Error **errp)
}
/* write section to vmcore */
- if (s->have_section) {
+ if (s->shdr_num) {
write_elf_section(s, 0, errp);
if (*errp) {
return;
@@ -1811,11 +1811,11 @@ static void dump_init(DumpState *s, int fd, bool has_format,
*/
s->phdr_num = 1; /* PT_NOTE */
if (s->list.num < UINT16_MAX - 2) {
+ s->shdr_num = 0;
s->phdr_num += s->list.num;
- s->have_section = false;
} else {
/* sh_info of section 0 holds the real number of phdrs */
- s->have_section = true;
+ s->shdr_num = 1;
/* the type of shdr->sh_info is uint32_t, so we should avoid overflow */
if (s->list.num <= UINT32_MAX - 1) {
@@ -1826,19 +1826,19 @@ static void dump_init(DumpState *s, int fd, bool has_format,
}
if (s->dump_info.d_class == ELFCLASS64) {
- if (s->have_section) {
+ if (s->shdr_num) {
s->memory_offset = sizeof(Elf64_Ehdr) +
sizeof(Elf64_Phdr) * s->phdr_num +
- sizeof(Elf64_Shdr) + s->note_size;
+ sizeof(Elf64_Shdr) * s->shdr_num + s->note_size;
} else {
s->memory_offset = sizeof(Elf64_Ehdr) +
sizeof(Elf64_Phdr) * s->phdr_num + s->note_size;
}
} else {
- if (s->have_section) {
+ if (s->shdr_num) {
s->memory_offset = sizeof(Elf32_Ehdr) +
sizeof(Elf32_Phdr) * s->phdr_num +
- sizeof(Elf32_Shdr) + s->note_size;
+ sizeof(Elf32_Shdr) * s->shdr_num + s->note_size;
} else {
s->memory_offset = sizeof(Elf32_Ehdr) +
sizeof(Elf32_Phdr) * s->phdr_num + s->note_size;
diff --git a/include/sysemu/dump.h b/include/sysemu/dump.h
index b463fc9c02..19458bffbd 100644
--- a/include/sysemu/dump.h
+++ b/include/sysemu/dump.h
@@ -155,7 +155,7 @@ typedef struct DumpState {
ArchDumpInfo dump_info;
MemoryMappingList list;
uint32_t phdr_num;
- bool have_section;
+ uint32_t shdr_num;
bool resume;
bool detached;
ssize_t note_size;
--
2.37.3

142
SOURCES/kvm-dump-Refactor-dump_iterate-and-introduce-dump_filter.patch Normal file
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@ -0,0 +1,142 @@
From a18ba2fbaf132724e81be92da42b36d8f365e66c Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Thu, 11 Aug 2022 12:10:56 +0000
Subject: [PATCH 24/42] dump: Refactor dump_iterate and introduce
dump_filter_memblock_*()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [24/41] 74ef470f24d9d98093c4d63730a99474587033fd
The iteration over the memblocks in dump_iterate() is hard to
understand so it's about time to clean it up. Instead of manually
grabbing the next memblock we can use QTAILQ_FOREACH to iterate over
all memblocks.
Additionally we move the calculation of the offset and length out by
introducing and using the dump_filter_memblock_*() functions. These
functions will later be used to cleanup other parts of dump.c.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220811121111.9878-4-frankja@linux.ibm.com>
(cherry picked from commit 1e8113032f5b1efc5da66382470ce4809c76f8f2)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
dump/dump.c | 74 ++++++++++++++++++++++++++++++-----------------------
1 file changed, 42 insertions(+), 32 deletions(-)
diff --git a/dump/dump.c b/dump/dump.c
index fa787f379f..d981e843dd 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -592,31 +592,43 @@ static void dump_begin(DumpState *s, Error **errp)
write_elf_notes(s, errp);
}
-static int get_next_block(DumpState *s, GuestPhysBlock *block)
+static int64_t dump_filtered_memblock_size(GuestPhysBlock *block,
+ int64_t filter_area_start,
+ int64_t filter_area_length)
{
- while (1) {
- block = QTAILQ_NEXT(block, next);
- if (!block) {
- /* no more block */
- return 1;
- }
+ int64_t size, left, right;
- s->start = 0;
- s->next_block = block;
- if (s->has_filter) {
- if (block->target_start >= s->begin + s->length ||
- block->target_end <= s->begin) {
- /* This block is out of the range */
- continue;
- }
+ /* No filter, return full size */
+ if (!filter_area_length) {
+ return block->target_end - block->target_start;
+ }
- if (s->begin > block->target_start) {
- s->start = s->begin - block->target_start;
- }
+ /* calculate the overlapped region. */
+ left = MAX(filter_area_start, block->target_start);
+ right = MIN(filter_area_start + filter_area_length, block->target_end);
+ size = right - left;
+ size = size > 0 ? size : 0;
+
+ return size;
+}
+
+static int64_t dump_filtered_memblock_start(GuestPhysBlock *block,
+ int64_t filter_area_start,
+ int64_t filter_area_length)
+{
+ if (filter_area_length) {
+ /* return -1 if the block is not within filter area */
+ if (block->target_start >= filter_area_start + filter_area_length ||
+ block->target_end <= filter_area_start) {
+ return -1;
}
- return 0;
+ if (filter_area_start > block->target_start) {
+ return filter_area_start - block->target_start;
+ }
}
+
+ return 0;
}
/* write all memory to vmcore */
@@ -624,24 +636,22 @@ static void dump_iterate(DumpState *s, Error **errp)
{
ERRP_GUARD();
GuestPhysBlock *block;
- int64_t size;
-
- do {
- block = s->next_block;
+ int64_t memblock_size, memblock_start;
- size = block->target_end - block->target_start;
- if (s->has_filter) {
- size -= s->start;
- if (s->begin + s->length < block->target_end) {
- size -= block->target_end - (s->begin + s->length);
- }
+ QTAILQ_FOREACH(block, &s->guest_phys_blocks.head, next) {
+ memblock_start = dump_filtered_memblock_start(block, s->begin, s->length);
+ if (memblock_start == -1) {
+ continue;
}
- write_memory(s, block, s->start, size, errp);
+
+ memblock_size = dump_filtered_memblock_size(block, s->begin, s->length);
+
+ /* Write the memory to file */
+ write_memory(s, block, memblock_start, memblock_size, errp);
if (*errp) {
return;
}
-
- } while (!get_next_block(s, block));
+ }
}
static void create_vmcore(DumpState *s, Error **errp)
--
2.37.3

45
SOURCES/kvm-dump-Reintroduce-memory_offset-and-section_offset.patch Normal file
View File

@ -0,0 +1,45 @@
From 6932fe3afbec443bbf6acff5b707536254e1bc37 Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Mon, 17 Oct 2022 08:38:16 +0000
Subject: [PATCH 35/42] dump: Reintroduce memory_offset and section_offset
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [35/41] e60c0d066aeeedb42e724712bc3aa7b7591c6c79
section_offset will later be used to store the offset to the section
data which will be stored last. For now memory_offset is only needed
to make section_offset look nicer.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20221017083822.43118-5-frankja@linux.ibm.com>
(cherry picked from commit 13fd417ddc81a1685c6a8f4e1c80bbfe7150f164)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
dump/dump.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/dump/dump.c b/dump/dump.c
index d17537d4e9..7a42401790 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -1885,6 +1885,8 @@ static void dump_init(DumpState *s, int fd, bool has_format,
s->phdr_offset = s->shdr_offset + sizeof(Elf32_Shdr) * s->shdr_num;
s->note_offset = s->phdr_offset + sizeof(Elf32_Phdr) * s->phdr_num;
}
+ s->memory_offset = s->note_offset + s->note_size;
+ s->section_offset = s->memory_offset + s->total_size;
return;
--
2.37.3

70
SOURCES/kvm-dump-Remove-the-section-if-when-calculating-the-memo.patch Normal file
View File

@ -0,0 +1,70 @@
From a8eeab6936a2bd27b33b63aed7e2ef96034f7772 Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Wed, 30 Mar 2022 12:35:58 +0000
Subject: [PATCH 16/42] dump: Remove the section if when calculating the memory
offset
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [16/41] ff214d2c23b9cb16fd49d22d976829267df43133
When s->shdr_num is 0 we'll add 0 bytes of section headers which is
equivalent to not adding section headers but with the multiplication
we can remove a if/else.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220330123603.107120-5-frankja@linux.ibm.com>
(cherry picked from commit 344107e07bd81546474a54ab83800158ca953059)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
dump/dump.c | 24 ++++++++----------------
1 file changed, 8 insertions(+), 16 deletions(-)
diff --git a/dump/dump.c b/dump/dump.c
index 972e28b089..5cc2322325 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -1826,23 +1826,15 @@ static void dump_init(DumpState *s, int fd, bool has_format,
}
if (s->dump_info.d_class == ELFCLASS64) {
- if (s->shdr_num) {
- s->memory_offset = sizeof(Elf64_Ehdr) +
- sizeof(Elf64_Phdr) * s->phdr_num +
- sizeof(Elf64_Shdr) * s->shdr_num + s->note_size;
- } else {
- s->memory_offset = sizeof(Elf64_Ehdr) +
- sizeof(Elf64_Phdr) * s->phdr_num + s->note_size;
- }
+ s->memory_offset = sizeof(Elf64_Ehdr) +
+ sizeof(Elf64_Phdr) * s->phdr_num +
+ sizeof(Elf64_Shdr) * s->shdr_num +
+ s->note_size;
} else {
- if (s->shdr_num) {
- s->memory_offset = sizeof(Elf32_Ehdr) +
- sizeof(Elf32_Phdr) * s->phdr_num +
- sizeof(Elf32_Shdr) * s->shdr_num + s->note_size;
- } else {
- s->memory_offset = sizeof(Elf32_Ehdr) +
- sizeof(Elf32_Phdr) * s->phdr_num + s->note_size;
- }
+ s->memory_offset = sizeof(Elf32_Ehdr) +
+ sizeof(Elf32_Phdr) * s->phdr_num +
+ sizeof(Elf32_Shdr) * s->shdr_num +
+ s->note_size;
}
return;
--
2.37.3

176
SOURCES/kvm-dump-Remove-the-sh_info-variable.patch Normal file
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@ -0,0 +1,176 @@
From eb763bec53d6b9aea7a6b60b0cf8c5d8b5f1b35c Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Thu, 7 Apr 2022 09:48:24 +0000
Subject: [PATCH 14/42] dump: Remove the sh_info variable
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [14/41] 24af12b78c8f5a02cf85df2f6b1d64249f9499c9
There's no need to have phdr_num and sh_info at the same time. We can
make phdr_num 32 bit and set PN_XNUM when we write the header if
phdr_num >= PN_XNUM.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220407094824.5074-1-frankja@linux.ibm.com>
(cherry picked from commit 046bc4160bc780eaacc2d702a2589f1a7a01188d)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
dump/dump.c | 44 +++++++++++++++++++++++--------------------
include/sysemu/dump.h | 3 +--
2 files changed, 25 insertions(+), 22 deletions(-)
diff --git a/dump/dump.c b/dump/dump.c
index 9876123f2e..7236b167cc 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -124,6 +124,12 @@ static int fd_write_vmcore(const void *buf, size_t size, void *opaque)
static void write_elf64_header(DumpState *s, Error **errp)
{
+ /*
+ * phnum in the elf header is 16 bit, if we have more segments we
+ * set phnum to PN_XNUM and write the real number of segments to a
+ * special section.
+ */
+ uint16_t phnum = MIN(s->phdr_num, PN_XNUM);
Elf64_Ehdr elf_header;
int ret;
@@ -138,9 +144,9 @@ static void write_elf64_header(DumpState *s, Error **errp)
elf_header.e_ehsize = cpu_to_dump16(s, sizeof(elf_header));
elf_header.e_phoff = cpu_to_dump64(s, sizeof(Elf64_Ehdr));
elf_header.e_phentsize = cpu_to_dump16(s, sizeof(Elf64_Phdr));
- elf_header.e_phnum = cpu_to_dump16(s, s->phdr_num);
+ elf_header.e_phnum = cpu_to_dump16(s, phnum);
if (s->have_section) {
- uint64_t shoff = sizeof(Elf64_Ehdr) + sizeof(Elf64_Phdr) * s->sh_info;
+ uint64_t shoff = sizeof(Elf64_Ehdr) + sizeof(Elf64_Phdr) * s->phdr_num;
elf_header.e_shoff = cpu_to_dump64(s, shoff);
elf_header.e_shentsize = cpu_to_dump16(s, sizeof(Elf64_Shdr));
@@ -155,6 +161,12 @@ static void write_elf64_header(DumpState *s, Error **errp)
static void write_elf32_header(DumpState *s, Error **errp)
{
+ /*
+ * phnum in the elf header is 16 bit, if we have more segments we
+ * set phnum to PN_XNUM and write the real number of segments to a
+ * special section.
+ */
+ uint16_t phnum = MIN(s->phdr_num, PN_XNUM);
Elf32_Ehdr elf_header;
int ret;
@@ -169,9 +181,9 @@ static void write_elf32_header(DumpState *s, Error **errp)
elf_header.e_ehsize = cpu_to_dump16(s, sizeof(elf_header));
elf_header.e_phoff = cpu_to_dump32(s, sizeof(Elf32_Ehdr));
elf_header.e_phentsize = cpu_to_dump16(s, sizeof(Elf32_Phdr));
- elf_header.e_phnum = cpu_to_dump16(s, s->phdr_num);
+ elf_header.e_phnum = cpu_to_dump16(s, phnum);
if (s->have_section) {
- uint32_t shoff = sizeof(Elf32_Ehdr) + sizeof(Elf32_Phdr) * s->sh_info;
+ uint32_t shoff = sizeof(Elf32_Ehdr) + sizeof(Elf32_Phdr) * s->phdr_num;
elf_header.e_shoff = cpu_to_dump32(s, shoff);
elf_header.e_shentsize = cpu_to_dump16(s, sizeof(Elf32_Shdr));
@@ -358,12 +370,12 @@ static void write_elf_section(DumpState *s, int type, Error **errp)
if (type == 0) {
shdr_size = sizeof(Elf32_Shdr);
memset(&shdr32, 0, shdr_size);
- shdr32.sh_info = cpu_to_dump32(s, s->sh_info);
+ shdr32.sh_info = cpu_to_dump32(s, s->phdr_num);
shdr = &shdr32;
} else {
shdr_size = sizeof(Elf64_Shdr);
memset(&shdr64, 0, shdr_size);
- shdr64.sh_info = cpu_to_dump32(s, s->sh_info);
+ shdr64.sh_info = cpu_to_dump32(s, s->phdr_num);
shdr = &shdr64;
}
@@ -478,13 +490,6 @@ static void write_elf_loads(DumpState *s, Error **errp)
hwaddr offset, filesz;
MemoryMapping *memory_mapping;
uint32_t phdr_index = 1;
- uint32_t max_index;
-
- if (s->have_section) {
- max_index = s->sh_info;
- } else {
- max_index = s->phdr_num;
- }
QTAILQ_FOREACH(memory_mapping, &s->list.head, next) {
get_offset_range(memory_mapping->phys_addr,
@@ -502,7 +507,7 @@ static void write_elf_loads(DumpState *s, Error **errp)
return;
}
- if (phdr_index >= max_index) {
+ if (phdr_index >= s->phdr_num) {
break;
}
}
@@ -1809,22 +1814,21 @@ static void dump_init(DumpState *s, int fd, bool has_format,
s->phdr_num += s->list.num;
s->have_section = false;
} else {
+ /* sh_info of section 0 holds the real number of phdrs */
s->have_section = true;
- s->phdr_num = PN_XNUM;
- s->sh_info = 1; /* PT_NOTE */
/* the type of shdr->sh_info is uint32_t, so we should avoid overflow */
if (s->list.num <= UINT32_MAX - 1) {
- s->sh_info += s->list.num;
+ s->phdr_num += s->list.num;
} else {
- s->sh_info = UINT32_MAX;
+ s->phdr_num = UINT32_MAX;
}
}
if (s->dump_info.d_class == ELFCLASS64) {
if (s->have_section) {
s->memory_offset = sizeof(Elf64_Ehdr) +
- sizeof(Elf64_Phdr) * s->sh_info +
+ sizeof(Elf64_Phdr) * s->phdr_num +
sizeof(Elf64_Shdr) + s->note_size;
} else {
s->memory_offset = sizeof(Elf64_Ehdr) +
@@ -1833,7 +1837,7 @@ static void dump_init(DumpState *s, int fd, bool has_format,
} else {
if (s->have_section) {
s->memory_offset = sizeof(Elf32_Ehdr) +
- sizeof(Elf32_Phdr) * s->sh_info +
+ sizeof(Elf32_Phdr) * s->phdr_num +
sizeof(Elf32_Shdr) + s->note_size;
} else {
s->memory_offset = sizeof(Elf32_Ehdr) +
diff --git a/include/sysemu/dump.h b/include/sysemu/dump.h
index 250143cb5a..b463fc9c02 100644
--- a/include/sysemu/dump.h
+++ b/include/sysemu/dump.h
@@ -154,8 +154,7 @@ typedef struct DumpState {
GuestPhysBlockList guest_phys_blocks;
ArchDumpInfo dump_info;
MemoryMappingList list;
- uint16_t phdr_num;
- uint32_t sh_info;
+ uint32_t phdr_num;
bool have_section;
bool resume;
bool detached;
--
2.37.3

69
SOURCES/kvm-dump-Rename-write_elf-_phdr_note-to-prepare_elf-_phd.patch Normal file
View File

@ -0,0 +1,69 @@
From 18fef7f02801d51207d67b8f8ec5f0d828889c78 Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Thu, 11 Aug 2022 12:11:01 +0000
Subject: [PATCH 29/42] dump: Rename write_elf*_phdr_note to
prepare_elf*_phdr_note
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [29/41] 876cea6f6e51be8df2763f56d0daef99d11fdd49
The functions in question do not actually write to the file descriptor
they set up a buffer which is later written to the fd.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220811121111.9878-9-frankja@linux.ibm.com>
(cherry picked from commit 2341a94d3a0a8a93a5a977e642da1807b8edaab8)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
dump/dump.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/dump/dump.c b/dump/dump.c
index 8d5226f861..c2c1341ad7 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -261,7 +261,7 @@ static void write_elf32_load(DumpState *s, MemoryMapping *memory_mapping,
}
}
-static void write_elf64_phdr_note(DumpState *s, Elf64_Phdr *phdr)
+static void prepare_elf64_phdr_note(DumpState *s, Elf64_Phdr *phdr)
{
memset(phdr, 0, sizeof(*phdr));
phdr->p_type = cpu_to_dump32(s, PT_NOTE);
@@ -317,7 +317,7 @@ static void write_elf64_notes(WriteCoreDumpFunction f, DumpState *s,
write_guest_note(f, s, errp);
}
-static void write_elf32_phdr_note(DumpState *s, Elf32_Phdr *phdr)
+static void prepare_elf32_phdr_note(DumpState *s, Elf32_Phdr *phdr)
{
memset(phdr, 0, sizeof(*phdr));
phdr->p_type = cpu_to_dump32(s, PT_NOTE);
@@ -365,11 +365,11 @@ static void write_elf_phdr_note(DumpState *s, Error **errp)
int ret;
if (dump_is_64bit(s)) {
- write_elf64_phdr_note(s, &phdr64);
+ prepare_elf64_phdr_note(s, &phdr64);
size = sizeof(phdr64);
phdr = &phdr64;
} else {
- write_elf32_phdr_note(s, &phdr32);
+ prepare_elf32_phdr_note(s, &phdr32);
size = sizeof(phdr32);
phdr = &phdr32;
}
--
2.37.3

57
SOURCES/kvm-dump-Rename-write_elf_loads-to-write_elf_phdr_loads.patch Normal file
View File

@ -0,0 +1,57 @@
From 04d4947a22fe3192384ff486d0a979d799ded98e Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Thu, 11 Aug 2022 12:10:55 +0000
Subject: [PATCH 23/42] dump: Rename write_elf_loads to write_elf_phdr_loads
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [23/41] 18e3ef70b97c525b7c43cf12143204bdb1060e4f
Let's make it a bit clearer that we write the program headers of the
PT_LOAD type.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Reviewed-by: Steffen Eiden <seiden@ibm.linux.com>
Message-Id: <20220811121111.9878-3-frankja@linux.ibm.com>
(cherry picked from commit afae6056ea79e2d89fd90867de3a01732eae724f)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
dump/dump.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/dump/dump.c b/dump/dump.c
index a451abc590..fa787f379f 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -491,7 +491,7 @@ static void get_offset_range(hwaddr phys_addr,
}
}
-static void write_elf_loads(DumpState *s, Error **errp)
+static void write_elf_phdr_loads(DumpState *s, Error **errp)
{
ERRP_GUARD();
hwaddr offset, filesz;
@@ -574,8 +574,8 @@ static void dump_begin(DumpState *s, Error **errp)
return;
}
- /* write all PT_LOAD to vmcore */
- write_elf_loads(s, errp);
+ /* write all PT_LOADs to vmcore */
+ write_elf_phdr_loads(s, errp);
if (*errp) {
return;
}
--
2.37.3

68
SOURCES/kvm-dump-Reorder-struct-DumpState.patch Normal file
View File

@ -0,0 +1,68 @@
From 7e8d6290099b33f88621b45e62652a97704c9573 Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Mon, 17 Oct 2022 08:38:15 +0000
Subject: [PATCH 34/42] dump: Reorder struct DumpState
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [34/41] 8d44e5e8c86ea5b33644eba141046cd657d0071e
Let's move ELF related members into one block and guest memory related
ones into another to improve readability.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20221017083822.43118-4-frankja@linux.ibm.com>
(cherry picked from commit 8384b73c46fd474847d7e74d121318e344edc3c4)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
include/sysemu/dump.h | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/include/sysemu/dump.h b/include/sysemu/dump.h
index 9995f65dc8..9ed811b313 100644
--- a/include/sysemu/dump.h
+++ b/include/sysemu/dump.h
@@ -154,15 +154,8 @@ typedef struct DumpState {
GuestPhysBlockList guest_phys_blocks;
ArchDumpInfo dump_info;
MemoryMappingList list;
- uint32_t phdr_num;
- uint32_t shdr_num;
bool resume;
bool detached;
- ssize_t note_size;
- hwaddr shdr_offset;
- hwaddr phdr_offset;
- hwaddr section_offset;
- hwaddr note_offset;
hwaddr memory_offset;
int fd;
@@ -177,6 +170,15 @@ typedef struct DumpState {
int64_t filter_area_begin; /* Start address of partial guest memory area */
int64_t filter_area_length; /* Length of partial guest memory area */
+ /* Elf dump related data */
+ uint32_t phdr_num;
+ uint32_t shdr_num;
+ ssize_t note_size;
+ hwaddr shdr_offset;
+ hwaddr phdr_offset;
+ hwaddr section_offset;
+ hwaddr note_offset;
+
void *elf_section_hdrs; /* Pointer to section header buffer */
uint8_t *note_buf; /* buffer for notes */
--
2.37.3

467
SOURCES/kvm-dump-Replace-opaque-DumpState-pointer-with-a-typed-o.patch Normal file
View File

@ -0,0 +1,467 @@
From 8f674e0e12e4b88fc035948612a0b0949e0ad892 Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Thu, 11 Aug 2022 12:10:54 +0000
Subject: [PATCH 22/42] dump: Replace opaque DumpState pointer with a typed one
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [22/41] 5f071d7ef441ae6f5da70eb56018c4657deee3d7
It's always better to convey the type of a pointer if at all
possible. So let's add the DumpState typedef to typedefs.h and move
the dump note functions from the opaque pointers to DumpState
pointers.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
CC: Peter Maydell <peter.maydell@linaro.org>
CC: Cédric Le Goater <clg@kaod.org>
CC: Daniel Henrique Barboza <danielhb413@gmail.com>
CC: David Gibson <david@gibson.dropbear.id.au>
CC: Greg Kurz <groug@kaod.org>
CC: Palmer Dabbelt <palmer@dabbelt.com>
CC: Alistair Francis <alistair.francis@wdc.com>
CC: Bin Meng <bin.meng@windriver.com>
CC: Cornelia Huck <cohuck@redhat.com>
CC: Thomas Huth <thuth@redhat.com>
CC: Richard Henderson <richard.henderson@linaro.org>
CC: David Hildenbrand <david@redhat.com>
Acked-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220811121111.9878-2-frankja@linux.ibm.com>
(cherry picked from commit 1af0006ab959864dfa2f59e9136c5fb93000b61f)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
include/hw/core/sysemu-cpu-ops.h | 8 ++++----
include/qemu/typedefs.h | 1 +
target/arm/arch_dump.c | 6 ++----
target/arm/cpu.h | 4 ++--
target/i386/arch_dump.c | 30 +++++++++++++++---------------
target/i386/cpu.h | 8 ++++----
target/ppc/arch_dump.c | 18 +++++++++---------
target/ppc/cpu.h | 4 ++--
target/riscv/arch_dump.c | 6 ++----
target/riscv/cpu.h | 4 ++--
target/s390x/arch_dump.c | 10 +++++-----
target/s390x/s390x-internal.h | 2 +-
12 files changed, 49 insertions(+), 52 deletions(-)
diff --git a/include/hw/core/sysemu-cpu-ops.h b/include/hw/core/sysemu-cpu-ops.h
index a9ba39e5f2..ee169b872c 100644
--- a/include/hw/core/sysemu-cpu-ops.h
+++ b/include/hw/core/sysemu-cpu-ops.h
@@ -53,25 +53,25 @@ typedef struct SysemuCPUOps {
* 32-bit VM coredump.
*/
int (*write_elf32_note)(WriteCoreDumpFunction f, CPUState *cpu,
- int cpuid, void *opaque);
+ int cpuid, DumpState *s);
/**
* @write_elf64_note: Callback for writing a CPU-specific ELF note to a
* 64-bit VM coredump.
*/
int (*write_elf64_note)(WriteCoreDumpFunction f, CPUState *cpu,
- int cpuid, void *opaque);
+ int cpuid, DumpState *s);
/**
* @write_elf32_qemunote: Callback for writing a CPU- and QEMU-specific ELF
* note to a 32-bit VM coredump.
*/
int (*write_elf32_qemunote)(WriteCoreDumpFunction f, CPUState *cpu,
- void *opaque);
+ DumpState *s);
/**
* @write_elf64_qemunote: Callback for writing a CPU- and QEMU-specific ELF
* note to a 64-bit VM coredump.
*/
int (*write_elf64_qemunote)(WriteCoreDumpFunction f, CPUState *cpu,
- void *opaque);
+ DumpState *s);
/**
* @virtio_is_big_endian: Callback to return %true if a CPU which supports
* runtime configurable endianness is currently big-endian.
diff --git a/include/qemu/typedefs.h b/include/qemu/typedefs.h
index ee60eb3de4..ac9d031be6 100644
--- a/include/qemu/typedefs.h
+++ b/include/qemu/typedefs.h
@@ -125,6 +125,7 @@ typedef struct VirtIODevice VirtIODevice;
typedef struct Visitor Visitor;
typedef struct VMChangeStateEntry VMChangeStateEntry;
typedef struct VMStateDescription VMStateDescription;
+typedef struct DumpState DumpState;
/*
* Pointer types
diff --git a/target/arm/arch_dump.c b/target/arm/arch_dump.c
index 0184845310..3a824e0aa6 100644
--- a/target/arm/arch_dump.c
+++ b/target/arm/arch_dump.c
@@ -232,12 +232,11 @@ static int aarch64_write_elf64_sve(WriteCoreDumpFunction f,
#endif
int arm_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
- int cpuid, void *opaque)
+ int cpuid, DumpState *s)
{
struct aarch64_note note;
ARMCPU *cpu = ARM_CPU(cs);
CPUARMState *env = &cpu->env;
- DumpState *s = opaque;
uint64_t pstate, sp;
int ret, i;
@@ -360,12 +359,11 @@ static int arm_write_elf32_vfp(WriteCoreDumpFunction f, CPUARMState *env,
}
int arm_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cs,
- int cpuid, void *opaque)
+ int cpuid, DumpState *s)
{
struct arm_note note;
ARMCPU *cpu = ARM_CPU(cs);
CPUARMState *env = &cpu->env;
- DumpState *s = opaque;
int ret, i;
bool fpvalid = cpu_isar_feature(aa32_vfp_simd, cpu);
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index e33f37b70a..8d2f496ef9 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -1065,9 +1065,9 @@ int arm_gen_dynamic_svereg_xml(CPUState *cpu, int base_reg);
const char *arm_gdb_get_dynamic_xml(CPUState *cpu, const char *xmlname);
int arm_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
- int cpuid, void *opaque);
+ int cpuid, DumpState *s);
int arm_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cs,
- int cpuid, void *opaque);
+ int cpuid, DumpState *s);
#ifdef TARGET_AARCH64
int aarch64_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg);
diff --git a/target/i386/arch_dump.c b/target/i386/arch_dump.c
index 004141fc04..c290910a04 100644
--- a/target/i386/arch_dump.c
+++ b/target/i386/arch_dump.c
@@ -42,7 +42,7 @@ typedef struct {
static int x86_64_write_elf64_note(WriteCoreDumpFunction f,
CPUX86State *env, int id,
- void *opaque)
+ DumpState *s)
{
x86_64_user_regs_struct regs;
Elf64_Nhdr *note;
@@ -94,7 +94,7 @@ static int x86_64_write_elf64_note(WriteCoreDumpFunction f,
buf += descsz - sizeof(x86_64_user_regs_struct)-sizeof(target_ulong);
memcpy(buf, &regs, sizeof(x86_64_user_regs_struct));
- ret = f(note, note_size, opaque);
+ ret = f(note, note_size, s);
g_free(note);
if (ret < 0) {
return -1;
@@ -148,7 +148,7 @@ static void x86_fill_elf_prstatus(x86_elf_prstatus *prstatus, CPUX86State *env,
}
static int x86_write_elf64_note(WriteCoreDumpFunction f, CPUX86State *env,
- int id, void *opaque)
+ int id, DumpState *s)
{
x86_elf_prstatus prstatus;
Elf64_Nhdr *note;
@@ -170,7 +170,7 @@ static int x86_write_elf64_note(WriteCoreDumpFunction f, CPUX86State *env,
buf += ROUND_UP(name_size, 4);
memcpy(buf, &prstatus, sizeof(prstatus));
- ret = f(note, note_size, opaque);
+ ret = f(note, note_size, s);
g_free(note);
if (ret < 0) {
return -1;
@@ -180,7 +180,7 @@ static int x86_write_elf64_note(WriteCoreDumpFunction f, CPUX86State *env,
}
int x86_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
- int cpuid, void *opaque)
+ int cpuid, DumpState *s)
{
X86CPU *cpu = X86_CPU(cs);
int ret;
@@ -189,10 +189,10 @@ int x86_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
bool lma = !!(first_x86_cpu->env.hflags & HF_LMA_MASK);
if (lma) {
- ret = x86_64_write_elf64_note(f, &cpu->env, cpuid, opaque);
+ ret = x86_64_write_elf64_note(f, &cpu->env, cpuid, s);
} else {
#endif
- ret = x86_write_elf64_note(f, &cpu->env, cpuid, opaque);
+ ret = x86_write_elf64_note(f, &cpu->env, cpuid, s);
#ifdef TARGET_X86_64
}
#endif
@@ -201,7 +201,7 @@ int x86_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
}
int x86_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cs,
- int cpuid, void *opaque)
+ int cpuid, DumpState *s)
{
X86CPU *cpu = X86_CPU(cs);
x86_elf_prstatus prstatus;
@@ -224,7 +224,7 @@ int x86_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cs,
buf += ROUND_UP(name_size, 4);
memcpy(buf, &prstatus, sizeof(prstatus));
- ret = f(note, note_size, opaque);
+ ret = f(note, note_size, s);
g_free(note);
if (ret < 0) {
return -1;
@@ -329,7 +329,7 @@ static void qemu_get_cpustate(QEMUCPUState *s, CPUX86State *env)
static inline int cpu_write_qemu_note(WriteCoreDumpFunction f,
CPUX86State *env,
- void *opaque,
+ DumpState *s,
int type)
{
QEMUCPUState state;
@@ -369,7 +369,7 @@ static inline int cpu_write_qemu_note(WriteCoreDumpFunction f,
buf += ROUND_UP(name_size, 4);
memcpy(buf, &state, sizeof(state));
- ret = f(note, note_size, opaque);
+ ret = f(note, note_size, s);
g_free(note);
if (ret < 0) {
return -1;
@@ -379,19 +379,19 @@ static inline int cpu_write_qemu_note(WriteCoreDumpFunction f,
}
int x86_cpu_write_elf64_qemunote(WriteCoreDumpFunction f, CPUState *cs,
- void *opaque)
+ DumpState *s)
{
X86CPU *cpu = X86_CPU(cs);
- return cpu_write_qemu_note(f, &cpu->env, opaque, 1);
+ return cpu_write_qemu_note(f, &cpu->env, s, 1);
}
int x86_cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cs,
- void *opaque)
+ DumpState *s)
{
X86CPU *cpu = X86_CPU(cs);
- return cpu_write_qemu_note(f, &cpu->env, opaque, 0);
+ return cpu_write_qemu_note(f, &cpu->env, s, 0);
}
int cpu_get_dump_info(ArchDumpInfo *info,
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 006b735fe4..5d2ddd81b9 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -1887,13 +1887,13 @@ extern const VMStateDescription vmstate_x86_cpu;
int x86_cpu_pending_interrupt(CPUState *cs, int interrupt_request);
int x86_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cpu,
- int cpuid, void *opaque);
+ int cpuid, DumpState *s);
int x86_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cpu,
- int cpuid, void *opaque);
+ int cpuid, DumpState *s);
int x86_cpu_write_elf64_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
- void *opaque);
+ DumpState *s);
int x86_cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
- void *opaque);
+ DumpState *s);
void x86_cpu_get_memory_mapping(CPUState *cpu, MemoryMappingList *list,
Error **errp);
diff --git a/target/ppc/arch_dump.c b/target/ppc/arch_dump.c
index bb392f6d88..e9f512bcd4 100644
--- a/target/ppc/arch_dump.c
+++ b/target/ppc/arch_dump.c
@@ -270,23 +270,23 @@ ssize_t cpu_get_note_size(int class, int machine, int nr_cpus)
static int ppc_write_all_elf_notes(const char *note_name,
WriteCoreDumpFunction f,
PowerPCCPU *cpu, int id,
- void *opaque)
+ DumpState *s)
{
- NoteFuncArg arg = { .state = opaque };
+ NoteFuncArg arg = { .state = s };
int ret = -1;
int note_size;
const NoteFuncDesc *nf;
for (nf = note_func; nf->note_contents_func; nf++) {
- arg.note.hdr.n_namesz = cpu_to_dump32(opaque, sizeof(arg.note.name));
- arg.note.hdr.n_descsz = cpu_to_dump32(opaque, nf->contents_size);
+ arg.note.hdr.n_namesz = cpu_to_dump32(s, sizeof(arg.note.name));
+ arg.note.hdr.n_descsz = cpu_to_dump32(s, nf->contents_size);
strncpy(arg.note.name, note_name, sizeof(arg.note.name));
(*nf->note_contents_func)(&arg, cpu);
note_size =
sizeof(arg.note) - sizeof(arg.note.contents) + nf->contents_size;
- ret = f(&arg.note, note_size, opaque);
+ ret = f(&arg.note, note_size, s);
if (ret < 0) {
return -1;
}
@@ -295,15 +295,15 @@ static int ppc_write_all_elf_notes(const char *note_name,
}
int ppc64_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
- int cpuid, void *opaque)
+ int cpuid, DumpState *s)
{
PowerPCCPU *cpu = POWERPC_CPU(cs);
- return ppc_write_all_elf_notes("CORE", f, cpu, cpuid, opaque);
+ return ppc_write_all_elf_notes("CORE", f, cpu, cpuid, s);
}
int ppc32_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cs,
- int cpuid, void *opaque)
+ int cpuid, DumpState *s)
{
PowerPCCPU *cpu = POWERPC_CPU(cs);
- return ppc_write_all_elf_notes("CORE", f, cpu, cpuid, opaque);
+ return ppc_write_all_elf_notes("CORE", f, cpu, cpuid, s);
}
diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h
index 23e8b76c85..f5fb284706 100644
--- a/target/ppc/cpu.h
+++ b/target/ppc/cpu.h
@@ -1289,9 +1289,9 @@ void ppc_gdb_gen_spr_xml(PowerPCCPU *cpu);
const char *ppc_gdb_get_dynamic_xml(CPUState *cs, const char *xml_name);
#endif
int ppc64_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
- int cpuid, void *opaque);
+ int cpuid, DumpState *s);
int ppc32_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cs,
- int cpuid, void *opaque);
+ int cpuid, DumpState *s);
#ifndef CONFIG_USER_ONLY
void ppc_cpu_do_interrupt(CPUState *cpu);
bool ppc_cpu_exec_interrupt(CPUState *cpu, int int_req);
diff --git a/target/riscv/arch_dump.c b/target/riscv/arch_dump.c
index 709f621d82..736a232956 100644
--- a/target/riscv/arch_dump.c
+++ b/target/riscv/arch_dump.c
@@ -64,12 +64,11 @@ static void riscv64_note_init(struct riscv64_note *note, DumpState *s,
}
int riscv_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
- int cpuid, void *opaque)
+ int cpuid, DumpState *s)
{
struct riscv64_note note;
RISCVCPU *cpu = RISCV_CPU(cs);
CPURISCVState *env = &cpu->env;
- DumpState *s = opaque;
int ret, i = 0;
const char name[] = "CORE";
@@ -134,12 +133,11 @@ static void riscv32_note_init(struct riscv32_note *note, DumpState *s,
}
int riscv_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cs,
- int cpuid, void *opaque)
+ int cpuid, DumpState *s)
{
struct riscv32_note note;
RISCVCPU *cpu = RISCV_CPU(cs);
CPURISCVState *env = &cpu->env;
- DumpState *s = opaque;
int ret, i;
const char name[] = "CORE";
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 0760c0af93..4cce524b2c 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -344,9 +344,9 @@ extern const char * const riscv_fpr_regnames[];
const char *riscv_cpu_get_trap_name(target_ulong cause, bool async);
void riscv_cpu_do_interrupt(CPUState *cpu);
int riscv_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
- int cpuid, void *opaque);
+ int cpuid, DumpState *s);
int riscv_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cs,
- int cpuid, void *opaque);
+ int cpuid, DumpState *s);
int riscv_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg);
int riscv_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
bool riscv_cpu_fp_enabled(CPURISCVState *env);
diff --git a/target/s390x/arch_dump.c b/target/s390x/arch_dump.c
index 08daf93ae1..f60a14920d 100644
--- a/target/s390x/arch_dump.c
+++ b/target/s390x/arch_dump.c
@@ -204,7 +204,7 @@ static const NoteFuncDesc note_linux[] = {
static int s390x_write_elf64_notes(const char *note_name,
WriteCoreDumpFunction f,
S390CPU *cpu, int id,
- void *opaque,
+ DumpState *s,
const NoteFuncDesc *funcs)
{
Note note;
@@ -222,7 +222,7 @@ static int s390x_write_elf64_notes(const char *note_name,
(*nf->note_contents_func)(&note, cpu, id);
note_size = sizeof(note) - sizeof(note.contents) + nf->contents_size;
- ret = f(&note, note_size, opaque);
+ ret = f(&note, note_size, s);
if (ret < 0) {
return -1;
@@ -235,16 +235,16 @@ static int s390x_write_elf64_notes(const char *note_name,
int s390_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
- int cpuid, void *opaque)
+ int cpuid, DumpState *s)
{
S390CPU *cpu = S390_CPU(cs);
int r;
- r = s390x_write_elf64_notes("CORE", f, cpu, cpuid, opaque, note_core);
+ r = s390x_write_elf64_notes("CORE", f, cpu, cpuid, s, note_core);
if (r) {
return r;
}
- return s390x_write_elf64_notes("LINUX", f, cpu, cpuid, opaque, note_linux);
+ return s390x_write_elf64_notes("LINUX", f, cpu, cpuid, s, note_linux);
}
int cpu_get_dump_info(ArchDumpInfo *info,
diff --git a/target/s390x/s390x-internal.h b/target/s390x/s390x-internal.h
index 1a178aed41..02cf6c3f43 100644
--- a/target/s390x/s390x-internal.h
+++ b/target/s390x/s390x-internal.h
@@ -228,7 +228,7 @@ static inline hwaddr decode_basedisp_s(CPUS390XState *env, uint32_t ipb,
/* arch_dump.c */
int s390_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
- int cpuid, void *opaque);
+ int cpuid, DumpState *s);
/* cc_helper.c */
--
2.37.3

73
SOURCES/kvm-dump-Rework-dump_calculate_size-function.patch Normal file
View File

@ -0,0 +1,73 @@
From 1f7cb73592a1922b3a981eb3232098281e07679f Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Thu, 11 Aug 2022 12:10:59 +0000
Subject: [PATCH 27/42] dump: Rework dump_calculate_size function
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [27/41] eaa05c39109b57a119752ad3df66f4c2ace2cbe4
dump_calculate_size() sums up all the sizes of the guest memory
blocks. Since we already have a function that calculates the size of a
single memory block (dump_get_memblock_size()) we can simply iterate
over the blocks and use the function instead of calculating the size
ourselves.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Message-Id: <20220811121111.9878-7-frankja@linux.ibm.com>
(cherry picked from commit c370d5300f9ac1f90f8158082d22262b904fe30e)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
dump/dump.c | 22 ++++++++--------------
1 file changed, 8 insertions(+), 14 deletions(-)
diff --git a/dump/dump.c b/dump/dump.c
index f6fe13e258..902a85ef8e 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -1557,25 +1557,19 @@ bool dump_in_progress(void)
return (qatomic_read(&state->status) == DUMP_STATUS_ACTIVE);
}
-/* calculate total size of memory to be dumped (taking filter into
- * acoount.) */
+/*
+ * calculate total size of memory to be dumped (taking filter into
+ * account.)
+ */
static int64_t dump_calculate_size(DumpState *s)
{
GuestPhysBlock *block;
- int64_t size = 0, total = 0, left = 0, right = 0;
+ int64_t total = 0;
QTAILQ_FOREACH(block, &s->guest_phys_blocks.head, next) {
- if (dump_has_filter(s)) {
- /* calculate the overlapped region. */
- left = MAX(s->filter_area_begin, block->target_start);
- right = MIN(s->filter_area_begin + s->filter_area_length, block->target_end);
- size = right - left;
- size = size > 0 ? size : 0;
- } else {
- /* count the whole region in */
- size = (block->target_end - block->target_start);
- }
- total += size;
+ total += dump_filtered_memblock_size(block,
+ s->filter_area_begin,
+ s->filter_area_length);
}
return total;
--
2.37.3

187
SOURCES/kvm-dump-Rework-filter-area-variables.patch Normal file
View File

@ -0,0 +1,187 @@
From 411f5354b809f6b783946e58d7655135814fb809 Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Thu, 11 Aug 2022 12:10:58 +0000
Subject: [PATCH 26/42] dump: Rework filter area variables
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [26/41] f10a5523dfd2724f7a8637fca3ed68ba6df659a5
While the DumpState begin and length variables directly mirror the API
variable names they are not very descriptive. So let's add a
"filter_area_" prefix and make has_filter a function checking length > 0.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220811121111.9878-6-frankja@linux.ibm.com>
(cherry picked from commit dddf725f70bfe7f5adb41fa31dbd06e767271bda)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
dump/dump.c | 53 +++++++++++++++++++++++++------------------
include/sysemu/dump.h | 13 ++++++++---
2 files changed, 41 insertions(+), 25 deletions(-)
diff --git a/dump/dump.c b/dump/dump.c
index e6aa037f59..f6fe13e258 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -60,6 +60,11 @@ static inline bool dump_is_64bit(DumpState *s)
return s->dump_info.d_class == ELFCLASS64;
}
+static inline bool dump_has_filter(DumpState *s)
+{
+ return s->filter_area_length > 0;
+}
+
uint16_t cpu_to_dump16(DumpState *s, uint16_t val)
{
if (s->dump_info.d_endian == ELFDATA2LSB) {
@@ -444,29 +449,30 @@ static void get_offset_range(hwaddr phys_addr,
*p_offset = -1;
*p_filesz = 0;
- if (s->has_filter) {
- if (phys_addr < s->begin || phys_addr >= s->begin + s->length) {
+ if (dump_has_filter(s)) {
+ if (phys_addr < s->filter_area_begin ||
+ phys_addr >= s->filter_area_begin + s->filter_area_length) {
return;
}
}
QTAILQ_FOREACH(block, &s->guest_phys_blocks.head, next) {
- if (s->has_filter) {
- if (block->target_start >= s->begin + s->length ||
- block->target_end <= s->begin) {
+ if (dump_has_filter(s)) {
+ if (block->target_start >= s->filter_area_begin + s->filter_area_length ||
+ block->target_end <= s->filter_area_begin) {
/* This block is out of the range */
continue;
}
- if (s->begin <= block->target_start) {
+ if (s->filter_area_begin <= block->target_start) {
start = block->target_start;
} else {
- start = s->begin;
+ start = s->filter_area_begin;
}
size_in_block = block->target_end - start;
- if (s->begin + s->length < block->target_end) {
- size_in_block -= block->target_end - (s->begin + s->length);
+ if (s->filter_area_begin + s->filter_area_length < block->target_end) {
+ size_in_block -= block->target_end - (s->filter_area_begin + s->filter_area_length);
}
} else {
start = block->target_start;
@@ -639,12 +645,12 @@ static void dump_iterate(DumpState *s, Error **errp)
int64_t memblock_size, memblock_start;
QTAILQ_FOREACH(block, &s->guest_phys_blocks.head, next) {
- memblock_start = dump_filtered_memblock_start(block, s->begin, s->length);
+ memblock_start = dump_filtered_memblock_start(block, s->filter_area_begin, s->filter_area_length);
if (memblock_start == -1) {
continue;
}
- memblock_size = dump_filtered_memblock_size(block, s->begin, s->length);
+ memblock_size = dump_filtered_memblock_size(block, s->filter_area_begin, s->filter_area_length);
/* Write the memory to file */
write_memory(s, block, memblock_start, memblock_size, errp);
@@ -1513,14 +1519,14 @@ static int validate_start_block(DumpState *s)
{
GuestPhysBlock *block;
- if (!s->has_filter) {
+ if (!dump_has_filter(s)) {
return 0;
}
QTAILQ_FOREACH(block, &s->guest_phys_blocks.head, next) {
/* This block is out of the range */
- if (block->target_start >= s->begin + s->length ||
- block->target_end <= s->begin) {
+ if (block->target_start >= s->filter_area_begin + s->filter_area_length ||
+ block->target_end <= s->filter_area_begin) {
continue;
}
return 0;
@@ -1559,10 +1565,10 @@ static int64_t dump_calculate_size(DumpState *s)
int64_t size = 0, total = 0, left = 0, right = 0;
QTAILQ_FOREACH(block, &s->guest_phys_blocks.head, next) {
- if (s->has_filter) {
+ if (dump_has_filter(s)) {
/* calculate the overlapped region. */
- left = MAX(s->begin, block->target_start);
- right = MIN(s->begin + s->length, block->target_end);
+ left = MAX(s->filter_area_begin, block->target_start);
+ right = MIN(s->filter_area_begin + s->filter_area_length, block->target_end);
size = right - left;
size = size > 0 ? size : 0;
} else {
@@ -1652,9 +1658,12 @@ static void dump_init(DumpState *s, int fd, bool has_format,
}
s->fd = fd;
- s->has_filter = has_filter;
- s->begin = begin;
- s->length = length;
+ if (has_filter && !length) {
+ error_setg(errp, QERR_INVALID_PARAMETER, "length");
+ goto cleanup;
+ }
+ s->filter_area_begin = begin;
+ s->filter_area_length = length;
memory_mapping_list_init(&s->list);
@@ -1787,8 +1796,8 @@ static void dump_init(DumpState *s, int fd, bool has_format,
return;
}
- if (s->has_filter) {
- memory_mapping_filter(&s->list, s->begin, s->length);
+ if (dump_has_filter(s)) {
+ memory_mapping_filter(&s->list, s->filter_area_begin, s->filter_area_length);
}
/*
diff --git a/include/sysemu/dump.h b/include/sysemu/dump.h
index 7fce1d4af6..b62513d87d 100644
--- a/include/sysemu/dump.h
+++ b/include/sysemu/dump.h
@@ -166,9 +166,16 @@ typedef struct DumpState {
hwaddr memory_offset;
int fd;
- bool has_filter;
- int64_t begin;
- int64_t length;
+ /*
+ * Dump filter area variables
+ *
+ * A filtered dump only contains the guest memory designated by
+ * the start address and length variables defined below.
+ *
+ * If length is 0, no filtering is applied.
+ */
+ int64_t filter_area_begin; /* Start address of partial guest memory area */
+ int64_t filter_area_length; /* Length of partial guest memory area */
uint8_t *note_buf; /* buffer for notes */
size_t note_buf_offset; /* the writing place in note_buf */
--
2.37.3

102
SOURCES/kvm-dump-Rework-get_start_block.patch Normal file
View File

@ -0,0 +1,102 @@
From b56c362132baef40cc25d910c1e0d217d83cfe44 Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Thu, 11 Aug 2022 12:10:57 +0000
Subject: [PATCH 25/42] dump: Rework get_start_block
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [25/41] c93842a1aaeadcc11e91c194452fcd05d163b3ca
get_start_block() returns the start address of the first memory block
or -1.
With the GuestPhysBlock iterator conversion we don't need to set the
start address and can therefore remove that code and the "start"
DumpState struct member. The only functionality left is the validation
of the start block so it only makes sense to re-name the function to
validate_start_block()
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Message-Id: <20220811121111.9878-5-frankja@linux.ibm.com>
(cherry picked from commit 0c2994ac9009577b967529ce18e269da5b280351)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
dump/dump.c | 20 ++++++--------------
include/sysemu/dump.h | 2 --
2 files changed, 6 insertions(+), 16 deletions(-)
diff --git a/dump/dump.c b/dump/dump.c
index d981e843dd..e6aa037f59 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -1509,30 +1509,22 @@ static void create_kdump_vmcore(DumpState *s, Error **errp)
}
}
-static ram_addr_t get_start_block(DumpState *s)
+static int validate_start_block(DumpState *s)
{
GuestPhysBlock *block;
if (!s->has_filter) {
- s->next_block = QTAILQ_FIRST(&s->guest_phys_blocks.head);
return 0;
}
QTAILQ_FOREACH(block, &s->guest_phys_blocks.head, next) {
+ /* This block is out of the range */
if (block->target_start >= s->begin + s->length ||
block->target_end <= s->begin) {
- /* This block is out of the range */
continue;
}
-
- s->next_block = block;
- if (s->begin > block->target_start) {
- s->start = s->begin - block->target_start;
- } else {
- s->start = 0;
- }
- return s->start;
- }
+ return 0;
+ }
return -1;
}
@@ -1679,8 +1671,8 @@ static void dump_init(DumpState *s, int fd, bool has_format,
goto cleanup;
}
- s->start = get_start_block(s);
- if (s->start == -1) {
+ /* Is the filter filtering everything? */
+ if (validate_start_block(s) == -1) {
error_setg(errp, QERR_INVALID_PARAMETER, "begin");
goto cleanup;
}
diff --git a/include/sysemu/dump.h b/include/sysemu/dump.h
index ffc2ea1072..7fce1d4af6 100644
--- a/include/sysemu/dump.h
+++ b/include/sysemu/dump.h
@@ -166,8 +166,6 @@ typedef struct DumpState {
hwaddr memory_offset;
int fd;
- GuestPhysBlock *next_block;
- ram_addr_t start;
bool has_filter;
int64_t begin;
int64_t length;
--
2.37.3

173
SOURCES/kvm-dump-Split-elf-header-functions-into-prepare-and-wri.patch Normal file
View File

@ -0,0 +1,173 @@
From d1e147a3133d4d31d4b0c02c05916366fadd9c30 Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Thu, 11 Aug 2022 12:11:00 +0000
Subject: [PATCH 28/42] dump: Split elf header functions into prepare and write
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [28/41] f70a13ad443835e7f46b7c5e176e372d370ac797
Let's split the write from the modification of the elf header so we
can consolidate the write of the data in one function.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220811121111.9878-8-frankja@linux.ibm.com>
(cherry picked from commit 670e76998a61ca171200fcded3865b294a2d1243)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
dump/dump.c | 100 ++++++++++++++++++++++++++++------------------------
1 file changed, 53 insertions(+), 47 deletions(-)
diff --git a/dump/dump.c b/dump/dump.c
index 902a85ef8e..8d5226f861 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -132,7 +132,7 @@ static int fd_write_vmcore(const void *buf, size_t size, void *opaque)
return 0;
}
-static void write_elf64_header(DumpState *s, Error **errp)
+static void prepare_elf64_header(DumpState *s, Elf64_Ehdr *elf_header)
{
/*
* phnum in the elf header is 16 bit, if we have more segments we
@@ -140,34 +140,27 @@ static void write_elf64_header(DumpState *s, Error **errp)
* special section.
*/
uint16_t phnum = MIN(s->phdr_num, PN_XNUM);
- Elf64_Ehdr elf_header;
- int ret;
- memset(&elf_header, 0, sizeof(Elf64_Ehdr));
- memcpy(&elf_header, ELFMAG, SELFMAG);
- elf_header.e_ident[EI_CLASS] = ELFCLASS64;
- elf_header.e_ident[EI_DATA] = s->dump_info.d_endian;
- elf_header.e_ident[EI_VERSION] = EV_CURRENT;
- elf_header.e_type = cpu_to_dump16(s, ET_CORE);
- elf_header.e_machine = cpu_to_dump16(s, s->dump_info.d_machine);
- elf_header.e_version = cpu_to_dump32(s, EV_CURRENT);
- elf_header.e_ehsize = cpu_to_dump16(s, sizeof(elf_header));
- elf_header.e_phoff = cpu_to_dump64(s, s->phdr_offset);
- elf_header.e_phentsize = cpu_to_dump16(s, sizeof(Elf64_Phdr));
- elf_header.e_phnum = cpu_to_dump16(s, phnum);
+ memset(elf_header, 0, sizeof(Elf64_Ehdr));
+ memcpy(elf_header, ELFMAG, SELFMAG);
+ elf_header->e_ident[EI_CLASS] = ELFCLASS64;
+ elf_header->e_ident[EI_DATA] = s->dump_info.d_endian;
+ elf_header->e_ident[EI_VERSION] = EV_CURRENT;
+ elf_header->e_type = cpu_to_dump16(s, ET_CORE);
+ elf_header->e_machine = cpu_to_dump16(s, s->dump_info.d_machine);
+ elf_header->e_version = cpu_to_dump32(s, EV_CURRENT);
+ elf_header->e_ehsize = cpu_to_dump16(s, sizeof(elf_header));
+ elf_header->e_phoff = cpu_to_dump64(s, s->phdr_offset);
+ elf_header->e_phentsize = cpu_to_dump16(s, sizeof(Elf64_Phdr));
+ elf_header->e_phnum = cpu_to_dump16(s, phnum);
if (s->shdr_num) {
- elf_header.e_shoff = cpu_to_dump64(s, s->shdr_offset);
- elf_header.e_shentsize = cpu_to_dump16(s, sizeof(Elf64_Shdr));
- elf_header.e_shnum = cpu_to_dump16(s, s->shdr_num);
- }
-
- ret = fd_write_vmcore(&elf_header, sizeof(elf_header), s);
- if (ret < 0) {
- error_setg_errno(errp, -ret, "dump: failed to write elf header");
+ elf_header->e_shoff = cpu_to_dump64(s, s->shdr_offset);
+ elf_header->e_shentsize = cpu_to_dump16(s, sizeof(Elf64_Shdr));
+ elf_header->e_shnum = cpu_to_dump16(s, s->shdr_num);
}
}
-static void write_elf32_header(DumpState *s, Error **errp)
+static void prepare_elf32_header(DumpState *s, Elf32_Ehdr *elf_header)
{
/*
* phnum in the elf header is 16 bit, if we have more segments we
@@ -175,28 +168,45 @@ static void write_elf32_header(DumpState *s, Error **errp)
* special section.
*/
uint16_t phnum = MIN(s->phdr_num, PN_XNUM);
- Elf32_Ehdr elf_header;
- int ret;
- memset(&elf_header, 0, sizeof(Elf32_Ehdr));
- memcpy(&elf_header, ELFMAG, SELFMAG);
- elf_header.e_ident[EI_CLASS] = ELFCLASS32;
- elf_header.e_ident[EI_DATA] = s->dump_info.d_endian;
- elf_header.e_ident[EI_VERSION] = EV_CURRENT;
- elf_header.e_type = cpu_to_dump16(s, ET_CORE);
- elf_header.e_machine = cpu_to_dump16(s, s->dump_info.d_machine);
- elf_header.e_version = cpu_to_dump32(s, EV_CURRENT);
- elf_header.e_ehsize = cpu_to_dump16(s, sizeof(elf_header));
- elf_header.e_phoff = cpu_to_dump32(s, s->phdr_offset);
- elf_header.e_phentsize = cpu_to_dump16(s, sizeof(Elf32_Phdr));
- elf_header.e_phnum = cpu_to_dump16(s, phnum);
+ memset(elf_header, 0, sizeof(Elf32_Ehdr));
+ memcpy(elf_header, ELFMAG, SELFMAG);
+ elf_header->e_ident[EI_CLASS] = ELFCLASS32;
+ elf_header->e_ident[EI_DATA] = s->dump_info.d_endian;
+ elf_header->e_ident[EI_VERSION] = EV_CURRENT;
+ elf_header->e_type = cpu_to_dump16(s, ET_CORE);
+ elf_header->e_machine = cpu_to_dump16(s, s->dump_info.d_machine);
+ elf_header->e_version = cpu_to_dump32(s, EV_CURRENT);
+ elf_header->e_ehsize = cpu_to_dump16(s, sizeof(elf_header));
+ elf_header->e_phoff = cpu_to_dump32(s, s->phdr_offset);
+ elf_header->e_phentsize = cpu_to_dump16(s, sizeof(Elf32_Phdr));
+ elf_header->e_phnum = cpu_to_dump16(s, phnum);
if (s->shdr_num) {
- elf_header.e_shoff = cpu_to_dump32(s, s->shdr_offset);
- elf_header.e_shentsize = cpu_to_dump16(s, sizeof(Elf32_Shdr));
- elf_header.e_shnum = cpu_to_dump16(s, s->shdr_num);
+ elf_header->e_shoff = cpu_to_dump32(s, s->shdr_offset);
+ elf_header->e_shentsize = cpu_to_dump16(s, sizeof(Elf32_Shdr));
+ elf_header->e_shnum = cpu_to_dump16(s, s->shdr_num);
}
+}
- ret = fd_write_vmcore(&elf_header, sizeof(elf_header), s);
+static void write_elf_header(DumpState *s, Error **errp)
+{
+ Elf32_Ehdr elf32_header;
+ Elf64_Ehdr elf64_header;
+ size_t header_size;
+ void *header_ptr;
+ int ret;
+
+ if (dump_is_64bit(s)) {
+ prepare_elf64_header(s, &elf64_header);
+ header_size = sizeof(elf64_header);
+ header_ptr = &elf64_header;
+ } else {
+ prepare_elf32_header(s, &elf32_header);
+ header_size = sizeof(elf32_header);
+ header_ptr = &elf32_header;
+ }
+
+ ret = fd_write_vmcore(header_ptr, header_size, s);
if (ret < 0) {
error_setg_errno(errp, -ret, "dump: failed to write elf header");
}
@@ -565,11 +575,7 @@ static void dump_begin(DumpState *s, Error **errp)
*/
/* write elf header to vmcore */
- if (dump_is_64bit(s)) {
- write_elf64_header(s, errp);
- } else {
- write_elf32_header(s, errp);
- }
+ write_elf_header(s, errp);
if (*errp) {
return;
}
--
2.37.3

420
SOURCES/kvm-dump-Use-ERRP_GUARD.patch Normal file
View File

@ -0,0 +1,420 @@
From 4ca61efe246d62d420eb332655c0c8ead4cc762b Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Wed, 30 Mar 2022 12:35:55 +0000
Subject: [PATCH 13/42] dump: Use ERRP_GUARD()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [13/41] f735cd1dab0230000cfadd878765fdf4647b239c
Let's move to the new way of handling errors before changing the dump
code. This patch has mostly been generated by the coccinelle script
scripts/coccinelle/errp-guard.cocci.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220330123603.107120-2-frankja@linux.ibm.com>
(cherry picked from commit 86a518bba4f4d7c9016fc5b104fe1e58b00ad756)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
dump/dump.c | 144 ++++++++++++++++++++++------------------------------
1 file changed, 61 insertions(+), 83 deletions(-)
diff --git a/dump/dump.c b/dump/dump.c
index 662d0a62cd..9876123f2e 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -390,23 +390,21 @@ static void write_data(DumpState *s, void *buf, int length, Error **errp)
static void write_memory(DumpState *s, GuestPhysBlock *block, ram_addr_t start,
int64_t size, Error **errp)
{
+ ERRP_GUARD();
int64_t i;
- Error *local_err = NULL;
for (i = 0; i < size / s->dump_info.page_size; i++) {
write_data(s, block->host_addr + start + i * s->dump_info.page_size,
- s->dump_info.page_size, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ s->dump_info.page_size, errp);
+ if (*errp) {
return;
}
}
if ((size % s->dump_info.page_size) != 0) {
write_data(s, block->host_addr + start + i * s->dump_info.page_size,
- size % s->dump_info.page_size, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ size % s->dump_info.page_size, errp);
+ if (*errp) {
return;
}
}
@@ -476,11 +474,11 @@ static void get_offset_range(hwaddr phys_addr,
static void write_elf_loads(DumpState *s, Error **errp)
{
+ ERRP_GUARD();
hwaddr offset, filesz;
MemoryMapping *memory_mapping;
uint32_t phdr_index = 1;
uint32_t max_index;
- Error *local_err = NULL;
if (s->have_section) {
max_index = s->sh_info;
@@ -494,14 +492,13 @@ static void write_elf_loads(DumpState *s, Error **errp)
s, &offset, &filesz);
if (s->dump_info.d_class == ELFCLASS64) {
write_elf64_load(s, memory_mapping, phdr_index++, offset,
- filesz, &local_err);
+ filesz, errp);
} else {
write_elf32_load(s, memory_mapping, phdr_index++, offset,
- filesz, &local_err);
+ filesz, errp);
}
- if (local_err) {
- error_propagate(errp, local_err);
+ if (*errp) {
return;
}
@@ -514,7 +511,7 @@ static void write_elf_loads(DumpState *s, Error **errp)
/* write elf header, PT_NOTE and elf note to vmcore. */
static void dump_begin(DumpState *s, Error **errp)
{
- Error *local_err = NULL;
+ ERRP_GUARD();
/*
* the vmcore's format is:
@@ -542,73 +539,64 @@ static void dump_begin(DumpState *s, Error **errp)
/* write elf header to vmcore */
if (s->dump_info.d_class == ELFCLASS64) {
- write_elf64_header(s, &local_err);
+ write_elf64_header(s, errp);
} else {
- write_elf32_header(s, &local_err);
+ write_elf32_header(s, errp);
}
- if (local_err) {
- error_propagate(errp, local_err);
+ if (*errp) {
return;
}
if (s->dump_info.d_class == ELFCLASS64) {
/* write PT_NOTE to vmcore */
- write_elf64_note(s, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ write_elf64_note(s, errp);
+ if (*errp) {
return;
}
/* write all PT_LOAD to vmcore */
- write_elf_loads(s, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ write_elf_loads(s, errp);
+ if (*errp) {
return;
}
/* write section to vmcore */
if (s->have_section) {
- write_elf_section(s, 1, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ write_elf_section(s, 1, errp);
+ if (*errp) {
return;
}
}
/* write notes to vmcore */
- write_elf64_notes(fd_write_vmcore, s, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ write_elf64_notes(fd_write_vmcore, s, errp);
+ if (*errp) {
return;
}
} else {
/* write PT_NOTE to vmcore */
- write_elf32_note(s, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ write_elf32_note(s, errp);
+ if (*errp) {
return;
}
/* write all PT_LOAD to vmcore */
- write_elf_loads(s, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ write_elf_loads(s, errp);
+ if (*errp) {
return;
}
/* write section to vmcore */
if (s->have_section) {
- write_elf_section(s, 0, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ write_elf_section(s, 0, errp);
+ if (*errp) {
return;
}
}
/* write notes to vmcore */
- write_elf32_notes(fd_write_vmcore, s, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ write_elf32_notes(fd_write_vmcore, s, errp);
+ if (*errp) {
return;
}
}
@@ -644,9 +632,9 @@ static int get_next_block(DumpState *s, GuestPhysBlock *block)
/* write all memory to vmcore */
static void dump_iterate(DumpState *s, Error **errp)
{
+ ERRP_GUARD();
GuestPhysBlock *block;
int64_t size;
- Error *local_err = NULL;
do {
block = s->next_block;
@@ -658,9 +646,8 @@ static void dump_iterate(DumpState *s, Error **errp)
size -= block->target_end - (s->begin + s->length);
}
}
- write_memory(s, block, s->start, size, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ write_memory(s, block, s->start, size, errp);
+ if (*errp) {
return;
}
@@ -669,11 +656,10 @@ static void dump_iterate(DumpState *s, Error **errp)
static void create_vmcore(DumpState *s, Error **errp)
{
- Error *local_err = NULL;
+ ERRP_GUARD();
- dump_begin(s, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ dump_begin(s, errp);
+ if (*errp) {
return;
}
@@ -810,6 +796,7 @@ static bool note_name_equal(DumpState *s,
/* write common header, sub header and elf note to vmcore */
static void create_header32(DumpState *s, Error **errp)
{
+ ERRP_GUARD();
DiskDumpHeader32 *dh = NULL;
KdumpSubHeader32 *kh = NULL;
size_t size;
@@ -818,7 +805,6 @@ static void create_header32(DumpState *s, Error **errp)
uint32_t bitmap_blocks;
uint32_t status = 0;
uint64_t offset_note;
- Error *local_err = NULL;
/* write common header, the version of kdump-compressed format is 6th */
size = sizeof(DiskDumpHeader32);
@@ -894,9 +880,8 @@ static void create_header32(DumpState *s, Error **errp)
s->note_buf_offset = 0;
/* use s->note_buf to store notes temporarily */
- write_elf32_notes(buf_write_note, s, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ write_elf32_notes(buf_write_note, s, errp);
+ if (*errp) {
goto out;
}
if (write_buffer(s->fd, offset_note, s->note_buf,
@@ -922,6 +907,7 @@ out:
/* write common header, sub header and elf note to vmcore */
static void create_header64(DumpState *s, Error **errp)
{
+ ERRP_GUARD();
DiskDumpHeader64 *dh = NULL;
KdumpSubHeader64 *kh = NULL;
size_t size;
@@ -930,7 +916,6 @@ static void create_header64(DumpState *s, Error **errp)
uint32_t bitmap_blocks;
uint32_t status = 0;
uint64_t offset_note;
- Error *local_err = NULL;
/* write common header, the version of kdump-compressed format is 6th */
size = sizeof(DiskDumpHeader64);
@@ -1006,9 +991,8 @@ static void create_header64(DumpState *s, Error **errp)
s->note_buf_offset = 0;
/* use s->note_buf to store notes temporarily */
- write_elf64_notes(buf_write_note, s, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ write_elf64_notes(buf_write_note, s, errp);
+ if (*errp) {
goto out;
}
@@ -1472,8 +1456,8 @@ out:
static void create_kdump_vmcore(DumpState *s, Error **errp)
{
+ ERRP_GUARD();
int ret;
- Error *local_err = NULL;
/*
* the kdump-compressed format is:
@@ -1503,21 +1487,18 @@ static void create_kdump_vmcore(DumpState *s, Error **errp)
return;
}
- write_dump_header(s, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ write_dump_header(s, errp);
+ if (*errp) {
return;
}
- write_dump_bitmap(s, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ write_dump_bitmap(s, errp);
+ if (*errp) {
return;
}
- write_dump_pages(s, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ write_dump_pages(s, errp);
+ if (*errp) {
return;
}
@@ -1647,10 +1628,10 @@ static void dump_init(DumpState *s, int fd, bool has_format,
DumpGuestMemoryFormat format, bool paging, bool has_filter,
int64_t begin, int64_t length, Error **errp)
{
+ ERRP_GUARD();
VMCoreInfoState *vmci = vmcoreinfo_find();
CPUState *cpu;
int nr_cpus;
- Error *err = NULL;
int ret;
s->has_format = has_format;
@@ -1769,9 +1750,8 @@ static void dump_init(DumpState *s, int fd, bool has_format,
/* get memory mapping */
if (paging) {
- qemu_get_guest_memory_mapping(&s->list, &s->guest_phys_blocks, &err);
- if (err != NULL) {
- error_propagate(errp, err);
+ qemu_get_guest_memory_mapping(&s->list, &s->guest_phys_blocks, errp);
+ if (*errp) {
goto cleanup;
}
} else {
@@ -1870,33 +1850,32 @@ cleanup:
/* this operation might be time consuming. */
static void dump_process(DumpState *s, Error **errp)
{
- Error *local_err = NULL;
+ ERRP_GUARD();
DumpQueryResult *result = NULL;
if (s->has_format && s->format == DUMP_GUEST_MEMORY_FORMAT_WIN_DMP) {
#ifdef TARGET_X86_64
- create_win_dump(s, &local_err);
+ create_win_dump(s, errp);
#endif
} else if (s->has_format && s->format != DUMP_GUEST_MEMORY_FORMAT_ELF) {
- create_kdump_vmcore(s, &local_err);
+ create_kdump_vmcore(s, errp);
} else {
- create_vmcore(s, &local_err);
+ create_vmcore(s, errp);
}
/* make sure status is written after written_size updates */
smp_wmb();
qatomic_set(&s->status,
- (local_err ? DUMP_STATUS_FAILED : DUMP_STATUS_COMPLETED));
+ (*errp ? DUMP_STATUS_FAILED : DUMP_STATUS_COMPLETED));
/* send DUMP_COMPLETED message (unconditionally) */
result = qmp_query_dump(NULL);
/* should never fail */
assert(result);
- qapi_event_send_dump_completed(result, !!local_err, (local_err ?
- error_get_pretty(local_err) : NULL));
+ qapi_event_send_dump_completed(result, !!*errp, (*errp ?
+ error_get_pretty(*errp) : NULL));
qapi_free_DumpQueryResult(result);
- error_propagate(errp, local_err);
dump_cleanup(s);
}
@@ -1925,10 +1904,10 @@ void qmp_dump_guest_memory(bool paging, const char *file,
int64_t length, bool has_format,
DumpGuestMemoryFormat format, Error **errp)
{
+ ERRP_GUARD();
const char *p;
int fd = -1;
DumpState *s;
- Error *local_err = NULL;
bool detach_p = false;
if (runstate_check(RUN_STATE_INMIGRATE)) {
@@ -2028,9 +2007,8 @@ void qmp_dump_guest_memory(bool paging, const char *file,
dump_state_prepare(s);
dump_init(s, fd, has_format, format, paging, has_begin,
- begin, length, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ begin, length, errp);
+ if (*errp) {
qatomic_set(&s->status, DUMP_STATUS_FAILED);
return;
}
--
2.37.3

150
SOURCES/kvm-dump-Use-a-buffer-for-ELF-section-data-and-headers.patch Normal file
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@ -0,0 +1,150 @@
From a918c7305ec7c68e8bc37b449f71e75d84124cd0 Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Mon, 17 Oct 2022 08:38:13 +0000
Subject: [PATCH 32/42] dump: Use a buffer for ELF section data and headers
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [32/41] e1a03e202e67764581e486f37e13e479200e5846
Currently we're writing the NULL section header if we overflow the
physical header number in the ELF header. But in the future we'll add
custom section headers AND section data.
To facilitate this we need to rearange section handling a bit. As with
the other ELF headers we split the code into a prepare and a write
step.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20221017083822.43118-2-frankja@linux.ibm.com>
(cherry picked from commit e41ed29bcee5cb16715317bcf290f6b5c196eb0a)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
dump/dump.c | 75 +++++++++++++++++++++++++++++--------------
include/sysemu/dump.h | 2 ++
2 files changed, 53 insertions(+), 24 deletions(-)
diff --git a/dump/dump.c b/dump/dump.c
index 88177fa886..4142b4cc0c 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -381,31 +381,60 @@ static void write_elf_phdr_note(DumpState *s, Error **errp)
}
}
-static void write_elf_section(DumpState *s, int type, Error **errp)
+static void prepare_elf_section_hdr_zero(DumpState *s)
{
- Elf32_Shdr shdr32;
- Elf64_Shdr shdr64;
- int shdr_size;
- void *shdr;
- int ret;
+ if (dump_is_64bit(s)) {
+ Elf64_Shdr *shdr64 = s->elf_section_hdrs;
- if (type == 0) {
- shdr_size = sizeof(Elf32_Shdr);
- memset(&shdr32, 0, shdr_size);
- shdr32.sh_info = cpu_to_dump32(s, s->phdr_num);
- shdr = &shdr32;
+ shdr64->sh_info = cpu_to_dump32(s, s->phdr_num);
} else {
- shdr_size = sizeof(Elf64_Shdr);
- memset(&shdr64, 0, shdr_size);
- shdr64.sh_info = cpu_to_dump32(s, s->phdr_num);
- shdr = &shdr64;
+ Elf32_Shdr *shdr32 = s->elf_section_hdrs;
+
+ shdr32->sh_info = cpu_to_dump32(s, s->phdr_num);
+ }
+}
+
+static void prepare_elf_section_hdrs(DumpState *s)
+{
+ size_t len, sizeof_shdr;
+
+ /*
+ * Section ordering:
+ * - HDR zero
+ */
+ sizeof_shdr = dump_is_64bit(s) ? sizeof(Elf64_Shdr) : sizeof(Elf32_Shdr);
+ len = sizeof_shdr * s->shdr_num;
+ s->elf_section_hdrs = g_malloc0(len);
+
+ /*
+ * The first section header is ALWAYS a special initial section
+ * header.
+ *
+ * The header should be 0 with one exception being that if
+ * phdr_num is PN_XNUM then the sh_info field contains the real
+ * number of segment entries.
+ *
+ * As we zero allocate the buffer we will only need to modify
+ * sh_info for the PN_XNUM case.
+ */
+ if (s->phdr_num >= PN_XNUM) {
+ prepare_elf_section_hdr_zero(s);
}
+}
- ret = fd_write_vmcore(shdr, shdr_size, s);
+static void write_elf_section_headers(DumpState *s, Error **errp)
+{
+ size_t sizeof_shdr = dump_is_64bit(s) ? sizeof(Elf64_Shdr) : sizeof(Elf32_Shdr);
+ int ret;
+
+ prepare_elf_section_hdrs(s);
+
+ ret = fd_write_vmcore(s->elf_section_hdrs, s->shdr_num * sizeof_shdr, s);
if (ret < 0) {
- error_setg_errno(errp, -ret,
- "dump: failed to write section header table");
+ error_setg_errno(errp, -ret, "dump: failed to write section headers");
}
+
+ g_free(s->elf_section_hdrs);
}
static void write_data(DumpState *s, void *buf, int length, Error **errp)
@@ -592,12 +621,10 @@ static void dump_begin(DumpState *s, Error **errp)
return;
}
- /* write section to vmcore */
- if (s->shdr_num) {
- write_elf_section(s, 1, errp);
- if (*errp) {
- return;
- }
+ /* write section headers to vmcore */
+ write_elf_section_headers(s, errp);
+ if (*errp) {
+ return;
}
/* write notes to vmcore */
diff --git a/include/sysemu/dump.h b/include/sysemu/dump.h
index b62513d87d..9995f65dc8 100644
--- a/include/sysemu/dump.h
+++ b/include/sysemu/dump.h
@@ -177,6 +177,8 @@ typedef struct DumpState {
int64_t filter_area_begin; /* Start address of partial guest memory area */
int64_t filter_area_length; /* Length of partial guest memory area */
+ void *elf_section_hdrs; /* Pointer to section header buffer */
+
uint8_t *note_buf; /* buffer for notes */
size_t note_buf_offset; /* the writing place in note_buf */
uint32_t nr_cpus; /* number of guest's cpu */
--
2.37.3

104
SOURCES/kvm-dump-Write-ELF-section-headers-right-after-ELF-heade.patch Normal file
View File

@ -0,0 +1,104 @@
From 987ede93fa4e3d058acddc19874e467faa116ede Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Mon, 17 Oct 2022 08:38:14 +0000
Subject: [PATCH 33/42] dump: Write ELF section headers right after ELF header
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [33/41] e956040753533ac376e9763145192de1e216027d
Let's start bundling the writes of the headers and of the data so we
have a clear ordering between them. Since the ELF header uses offsets
to the headers we can freely order them.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20221017083822.43118-3-frankja@linux.ibm.com>
(cherry picked from commit cb415fd61e48d52f81dcf38956e3f913651cff1c)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
dump/dump.c | 31 ++++++++++++++-----------------
1 file changed, 14 insertions(+), 17 deletions(-)
diff --git a/dump/dump.c b/dump/dump.c
index 4142b4cc0c..d17537d4e9 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -584,6 +584,8 @@ static void dump_begin(DumpState *s, Error **errp)
* --------------
* | elf header |
* --------------
+ * | sctn_hdr |
+ * --------------
* | PT_NOTE |
* --------------
* | PT_LOAD |
@@ -592,8 +594,6 @@ static void dump_begin(DumpState *s, Error **errp)
* --------------
* | PT_LOAD |
* --------------
- * | sec_hdr |
- * --------------
* | elf note |
* --------------
* | memory |
@@ -609,20 +609,20 @@ static void dump_begin(DumpState *s, Error **errp)
return;
}
- /* write PT_NOTE to vmcore */
- write_elf_phdr_note(s, errp);
+ /* write section headers to vmcore */
+ write_elf_section_headers(s, errp);
if (*errp) {
return;
}
- /* write all PT_LOADs to vmcore */
- write_elf_phdr_loads(s, errp);
+ /* write PT_NOTE to vmcore */
+ write_elf_phdr_note(s, errp);
if (*errp) {
return;
}
- /* write section headers to vmcore */
- write_elf_section_headers(s, errp);
+ /* write all PT_LOADs to vmcore */
+ write_elf_phdr_loads(s, errp);
if (*errp) {
return;
}
@@ -1877,16 +1877,13 @@ static void dump_init(DumpState *s, int fd, bool has_format,
}
if (dump_is_64bit(s)) {
- s->phdr_offset = sizeof(Elf64_Ehdr);
- s->shdr_offset = s->phdr_offset + sizeof(Elf64_Phdr) * s->phdr_num;
- s->note_offset = s->shdr_offset + sizeof(Elf64_Shdr) * s->shdr_num;
- s->memory_offset = s->note_offset + s->note_size;
+ s->shdr_offset = sizeof(Elf64_Ehdr);
+ s->phdr_offset = s->shdr_offset + sizeof(Elf64_Shdr) * s->shdr_num;
+ s->note_offset = s->phdr_offset + sizeof(Elf64_Phdr) * s->phdr_num;
} else {
-
- s->phdr_offset = sizeof(Elf32_Ehdr);
- s->shdr_offset = s->phdr_offset + sizeof(Elf32_Phdr) * s->phdr_num;
- s->note_offset = s->shdr_offset + sizeof(Elf32_Shdr) * s->shdr_num;
- s->memory_offset = s->note_offset + s->note_size;
+ s->shdr_offset = sizeof(Elf32_Ehdr);
+ s->phdr_offset = s->shdr_offset + sizeof(Elf32_Shdr) * s->shdr_num;
+ s->note_offset = s->phdr_offset + sizeof(Elf32_Phdr) * s->phdr_num;
}
return;
--
2.37.3

173
SOURCES/kvm-dump-fix-kdump-to-work-over-non-aligned-blocks.patch Normal file
View File

@ -0,0 +1,173 @@
From deaf4e0f5e90d227b7b9f3e5d1dff7fd0bc0206a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= <marcandre.lureau@redhat.com>
Date: Mon, 5 Sep 2022 16:06:21 +0400
Subject: [PATCH 31/42] dump: fix kdump to work over non-aligned blocks
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [31/41] b307bdce4a4791fc30160fa2a1678bd238f2432e
Rewrite get_next_page() to work over non-aligned blocks. When it
encounters non aligned addresses, it will try to fill a page provided by
the caller.
This solves a kdump crash with "tpm-crb-cmd" RAM memory region,
qemu-kvm: ../dump/dump.c:1162: _Bool get_next_page(GuestPhysBlock **,
uint64_t *, uint8_t **, DumpState *): Assertion `(block->target_start &
~target_page_mask) == 0' failed.
because:
guest_phys_block_add_section: target_start=00000000fed40080 target_end=00000000fed41000: added (count: 4)
Fixes:
https://bugzilla.redhat.com/show_bug.cgi?id=2120480
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Acked-by: David Hildenbrand <david@redhat.com>
(cherry picked from commit 94d788408d2d5a6474c99b2c9cf06913b9db7c58)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
dump/dump.c | 79 +++++++++++++++++++++++++++++++++++++----------------
1 file changed, 56 insertions(+), 23 deletions(-)
diff --git a/dump/dump.c b/dump/dump.c
index 1c49232390..88177fa886 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -1117,50 +1117,81 @@ static uint64_t dump_pfn_to_paddr(DumpState *s, uint64_t pfn)
}
/*
- * exam every page and return the page frame number and the address of the page.
- * bufptr can be NULL. note: the blocks here is supposed to reflect guest-phys
- * blocks, so block->target_start and block->target_end should be interal
- * multiples of the target page size.
+ * Return the page frame number and the page content in *bufptr. bufptr can be
+ * NULL. If not NULL, *bufptr must contains a target page size of pre-allocated
+ * memory. This is not necessarily the memory returned.
*/
static bool get_next_page(GuestPhysBlock **blockptr, uint64_t *pfnptr,
uint8_t **bufptr, DumpState *s)
{
GuestPhysBlock *block = *blockptr;
- hwaddr addr, target_page_mask = ~((hwaddr)s->dump_info.page_size - 1);
- uint8_t *buf;
+ uint32_t page_size = s->dump_info.page_size;
+ uint8_t *buf = NULL, *hbuf;
+ hwaddr addr;
/* block == NULL means the start of the iteration */
if (!block) {
block = QTAILQ_FIRST(&s->guest_phys_blocks.head);
*blockptr = block;
addr = block->target_start;
+ *pfnptr = dump_paddr_to_pfn(s, addr);
} else {
- addr = dump_pfn_to_paddr(s, *pfnptr + 1);
+ *pfnptr += 1;
+ addr = dump_pfn_to_paddr(s, *pfnptr);
}
assert(block != NULL);
- if ((addr >= block->target_start) &&
- (addr + s->dump_info.page_size <= block->target_end)) {
- buf = block->host_addr + (addr - block->target_start);
- } else {
- /* the next page is in the next block */
- block = QTAILQ_NEXT(block, next);
- *blockptr = block;
- if (!block) {
- return false;
+ while (1) {
+ if (addr >= block->target_start && addr < block->target_end) {
+ size_t n = MIN(block->target_end - addr, page_size - addr % page_size);
+ hbuf = block->host_addr + (addr - block->target_start);
+ if (!buf) {
+ if (n == page_size) {
+ /* this is a whole target page, go for it */
+ assert(addr % page_size == 0);
+ buf = hbuf;
+ break;
+ } else if (bufptr) {
+ assert(*bufptr);
+ buf = *bufptr;
+ memset(buf, 0, page_size);
+ } else {
+ return true;
+ }
+ }
+
+ memcpy(buf + addr % page_size, hbuf, n);
+ addr += n;
+ if (addr % page_size == 0) {
+ /* we filled up the page */
+ break;
+ }
+ } else {
+ /* the next page is in the next block */
+ *blockptr = block = QTAILQ_NEXT(block, next);
+ if (!block) {
+ break;
+ }
+
+ addr = block->target_start;
+ /* are we still in the same page? */
+ if (dump_paddr_to_pfn(s, addr) != *pfnptr) {
+ if (buf) {
+ /* no, but we already filled something earlier, return it */
+ break;
+ } else {
+ /* else continue from there */
+ *pfnptr = dump_paddr_to_pfn(s, addr);
+ }
+ }
}
- addr = block->target_start;
- buf = block->host_addr;
}
- assert((block->target_start & ~target_page_mask) == 0);
- assert((block->target_end & ~target_page_mask) == 0);
- *pfnptr = dump_paddr_to_pfn(s, addr);
if (bufptr) {
*bufptr = buf;
}
- return true;
+ return buf != NULL;
}
static void write_dump_bitmap(DumpState *s, Error **errp)
@@ -1306,6 +1337,7 @@ static void write_dump_pages(DumpState *s, Error **errp)
uint8_t *buf;
GuestPhysBlock *block_iter = NULL;
uint64_t pfn_iter;
+ g_autofree uint8_t *page = NULL;
/* get offset of page_desc and page_data in dump file */
offset_desc = s->offset_page;
@@ -1341,12 +1373,13 @@ static void write_dump_pages(DumpState *s, Error **errp)
}
offset_data += s->dump_info.page_size;
+ page = g_malloc(s->dump_info.page_size);
/*
* dump memory to vmcore page by page. zero page will all be resided in the
* first page of page section
*/
- while (get_next_page(&block_iter, &pfn_iter, &buf, s)) {
+ for (buf = page; get_next_page(&block_iter, &pfn_iter, &buf, s); buf = page) {
/* check zero page */
if (is_zero_page(buf, s->dump_info.page_size)) {
ret = write_cache(&page_desc, &pd_zero, sizeof(PageDescriptor),
--
2.37.3

75
SOURCES/kvm-dump-simplify-a-bit-kdump-get_next_page.patch Normal file
View File

@ -0,0 +1,75 @@
From bb55fde4d8ca587e2ef52ce58a0c22e4d66a08dc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= <marcandre.lureau@redhat.com>
Date: Thu, 25 Aug 2022 12:40:12 +0400
Subject: [PATCH 30/42] dump: simplify a bit kdump get_next_page()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [30/41] 417ac19fa96036e0242f40121ac6e87a9f3f70ba
This should be functionally equivalent, but slightly easier to read,
with simplified paths and checks at the end of the function.
The following patch is a major rewrite to get rid of the assert().
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
(cherry picked from commit 08df343874fcddd260021a04ce3c5a34f2c48164)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
dump/dump.c | 21 ++++++++-------------
1 file changed, 8 insertions(+), 13 deletions(-)
diff --git a/dump/dump.c b/dump/dump.c
index c2c1341ad7..1c49232390 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -1133,17 +1133,11 @@ static bool get_next_page(GuestPhysBlock **blockptr, uint64_t *pfnptr,
if (!block) {
block = QTAILQ_FIRST(&s->guest_phys_blocks.head);
*blockptr = block;
- assert((block->target_start & ~target_page_mask) == 0);
- assert((block->target_end & ~target_page_mask) == 0);
- *pfnptr = dump_paddr_to_pfn(s, block->target_start);
- if (bufptr) {
- *bufptr = block->host_addr;
- }
- return true;
+ addr = block->target_start;
+ } else {
+ addr = dump_pfn_to_paddr(s, *pfnptr + 1);
}
-
- *pfnptr = *pfnptr + 1;
- addr = dump_pfn_to_paddr(s, *pfnptr);
+ assert(block != NULL);
if ((addr >= block->target_start) &&
(addr + s->dump_info.page_size <= block->target_end)) {
@@ -1155,12 +1149,13 @@ static bool get_next_page(GuestPhysBlock **blockptr, uint64_t *pfnptr,
if (!block) {
return false;
}
- assert((block->target_start & ~target_page_mask) == 0);
- assert((block->target_end & ~target_page_mask) == 0);
- *pfnptr = dump_paddr_to_pfn(s, block->target_start);
+ addr = block->target_start;
buf = block->host_addr;
}
+ assert((block->target_start & ~target_page_mask) == 0);
+ assert((block->target_end & ~target_page_mask) == 0);
+ *pfnptr = dump_paddr_to_pfn(s, addr);
if (bufptr) {
*bufptr = buf;
}
--
2.37.3

61
SOURCES/kvm-edu-add-smp_mb__after_rmw.patch Normal file
View File

@ -0,0 +1,61 @@
From 7693449b235bbab6d32a1b87fa1d0e101c786f3b Mon Sep 17 00:00:00 2001
From: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Date: Thu, 9 Mar 2023 08:11:14 -0500
Subject: [PATCH 05/13] edu: add smp_mb__after_rmw()
RH-Author: Emanuele Giuseppe Esposito <eesposit@redhat.com>
RH-MergeRequest: 263: qatomic: add smp_mb__before/after_rmw()
RH-Bugzilla: 2168472
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Eric Auger <eric.auger@redhat.com>
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Commit: [5/10] 300901290e08b253b1278eedc39cd07c1e202b96
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2168472
commit 2482aeea4195ad84cf3d4e5b15b28ec5b420ed5a
Author: Paolo Bonzini <pbonzini@redhat.com>
Date: Thu Mar 2 11:16:13 2023 +0100
edu: add smp_mb__after_rmw()
Ensure ordering between clearing the COMPUTING flag and checking
IRQFACT, and between setting the IRQFACT flag and checking
COMPUTING. This ensures that no wakeups are lost.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
---
hw/misc/edu.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/hw/misc/edu.c b/hw/misc/edu.c
index e935c418d4..a1f8bc77e7 100644
--- a/hw/misc/edu.c
+++ b/hw/misc/edu.c
@@ -267,6 +267,8 @@ static void edu_mmio_write(void *opaque, hwaddr addr, uint64_t val,
case 0x20:
if (val & EDU_STATUS_IRQFACT) {
qatomic_or(&edu->status, EDU_STATUS_IRQFACT);
+ /* Order check of the COMPUTING flag after setting IRQFACT. */
+ smp_mb__after_rmw();
} else {
qatomic_and(&edu->status, ~EDU_STATUS_IRQFACT);
}
@@ -349,6 +351,9 @@ static void *edu_fact_thread(void *opaque)
qemu_mutex_unlock(&edu->thr_mutex);
qatomic_and(&edu->status, ~EDU_STATUS_COMPUTING);
+ /* Clear COMPUTING flag before checking IRQFACT. */
+ smp_mb__after_rmw();
+
if (qatomic_read(&edu->status) & EDU_STATUS_IRQFACT) {
qemu_mutex_lock_iothread();
edu_raise_irq(edu, FACT_IRQ);
--
2.37.3

81
SOURCES/kvm-hw-acpi-Add-ospm_status-hook-implementation-for-acpi.patch Normal file
View File

@ -0,0 +1,81 @@
From edead46187b1e55ad5e238332780aef19f1bc214 Mon Sep 17 00:00:00 2001
From: Jon Maloy <jmaloy@redhat.com>
Date: Wed, 9 Nov 2022 18:41:18 -0500
Subject: [PATCH 1/2] hw/acpi: Add ospm_status hook implementation for acpi-ged
RH-Author: Jon Maloy <jmaloy@redhat.com>
RH-MergeRequest: 228: qemu-kvm: backport some aarch64 fixes
RH-Bugzilla: 2132609
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Igor Mammedov <imammedo@redhat.com>
RH-Acked-by: Eric Auger <eric.auger@redhat.com>
RH-Acked-by: Gavin Shan <gshan@redhat.com>
RH-Commit: [1/2] 99730b1a27666ca745dc28d90751c938d43f1682 (jmaloy/qemu-kvm)
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=2132609
Upstream: Merged
commit d4424bebceaa8ffbc23060ce45e52a9bb817e3c9
Author: Keqian Zhu <zhukeqian1@huawei.com>
Date: Tue Aug 16 17:49:57 2022 +0800
hw/acpi: Add ospm_status hook implementation for acpi-ged
Setup an ARM virtual machine of machine virt and execute qmp "query-acpi-ospm-status"
causes segmentation fault with following dumpstack:
#1 0x0000aaaaab64235c in qmp_query_acpi_ospm_status (errp=errp@entry=0xfffffffff030) at ../monitor/qmp-cmds.c:312
#2 0x0000aaaaabfc4e20 in qmp_marshal_query_acpi_ospm_status (args=<optimized out>, ret=0xffffea4ffe90, errp=0xffffea4ffe88) at qapi/qapi-commands-acpi.c:63
#3 0x0000aaaaabff8ba0 in do_qmp_dispatch_bh (opaque=0xffffea4ffe98) at ../qapi/qmp-dispatch.c:128
#4 0x0000aaaaac02e594 in aio_bh_call (bh=0xffffe0004d80) at ../util/async.c:150
#5 aio_bh_poll (ctx=ctx@entry=0xaaaaad0f6040) at ../util/async.c:178
#6 0x0000aaaaac00bd40 in aio_dispatch (ctx=ctx@entry=0xaaaaad0f6040) at ../util/aio-posix.c:421
#7 0x0000aaaaac02e010 in aio_ctx_dispatch (source=0xaaaaad0f6040, callback=<optimized out>, user_data=<optimized out>) at ../util/async.c:320
#8 0x0000fffff76f6884 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
#9 0x0000aaaaac0452d4 in glib_pollfds_poll () at ../util/main-loop.c:297
#10 os_host_main_loop_wait (timeout=0) at ../util/main-loop.c:320
#11 main_loop_wait (nonblocking=nonblocking@entry=0) at ../util/main-loop.c:596
#12 0x0000aaaaab5c9e50 in qemu_main_loop () at ../softmmu/runstate.c:734
#13 0x0000aaaaab185370 in qemu_main (argc=argc@entry=47, argv=argv@entry=0xfffffffff518, envp=envp@entry=0x0) at ../softmmu/main.c:38
#14 0x0000aaaaab16f99c in main (argc=47, argv=0xfffffffff518) at ../softmmu/main.c:47
Fixes: ebb62075021a ("hw/acpi: Add ACPI Generic Event Device Support")
Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-id: 20220816094957.31700-1-zhukeqian1@huawei.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
(cherry picked from commit d4424bebceaa8ffbc23060ce45e52a9bb817e3c9)
Signed-off-by: Jon Maloy <jmaloy@redhat.com>
---
hw/acpi/generic_event_device.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/hw/acpi/generic_event_device.c b/hw/acpi/generic_event_device.c
index e28457a7d1..a3d31631fe 100644
--- a/hw/acpi/generic_event_device.c
+++ b/hw/acpi/generic_event_device.c
@@ -267,6 +267,13 @@ static void acpi_ged_unplug_cb(HotplugHandler *hotplug_dev,
}
}
+static void acpi_ged_ospm_status(AcpiDeviceIf *adev, ACPIOSTInfoList ***list)
+{
+ AcpiGedState *s = ACPI_GED(adev);
+
+ acpi_memory_ospm_status(&s->memhp_state, list);
+}
+
static void acpi_ged_send_event(AcpiDeviceIf *adev, AcpiEventStatusBits ev)
{
AcpiGedState *s = ACPI_GED(adev);
@@ -409,6 +416,7 @@ static void acpi_ged_class_init(ObjectClass *class, void *data)
hc->unplug_request = acpi_ged_unplug_request_cb;
hc->unplug = acpi_ged_unplug_cb;
+ adevc->ospm_status = acpi_ged_ospm_status;
adevc->send_event = acpi_ged_send_event;
}
--
2.37.3

14
SOURCES/kvm-hw-display-qxl-Assert-memory-slot-fits-in-preallocat.patch
View File

@ -1,21 +1,21 @@
From a77c0c98570dbfcd0376d115733393b3658ffff9 Mon Sep 17 00:00:00 2001
From 100f33ff8a1d55986e43b99ba8726abc29ee8d26 Mon Sep 17 00:00:00 2001
From: Jon Maloy <jmaloy@redhat.com>
Date: Mon, 5 Dec 2022 15:32:55 -0500
Subject: [PATCH 6/6] hw/display/qxl: Assert memory slot fits in preallocated
Subject: [PATCH 5/5] hw/display/qxl: Assert memory slot fits in preallocated
MemoryRegion
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Jon Maloy <jmaloy@redhat.com>
RH-MergeRequest: 242: hw/display/qxl: Have qxl_log_command Return early if no log_cmd handler
RH-Bugzilla: 2152085
RH-MergeRequest: 240: hw/display/qxl: Have qxl_log_command Return early if no log_cmd handler
RH-Bugzilla: 2148545
RH-Acked-by: Gerd Hoffmann <kraxel@redhat.com>
RH-Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Commit: [5/5] 90eb0289592bedb0c9c087190083c85b042f8908 (jmaloy/jons-qemu-kvm)
RH-Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
RH-Commit: [5/5] f809ce48e7989dd6547b7c8bf1a5efc3fdcacbac (jmaloy/jons-qemu-kvm)
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=2152085
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=2148545
CVE: CVE-2022-4144
Upstream: Merged

14
SOURCES/kvm-hw-display-qxl-Avoid-buffer-overrun-in-qxl_phys2virt.patch
View File

@ -1,21 +1,21 @@
From e3fcb7370760b801f52907ae5bb385cebe2e2e1c Mon Sep 17 00:00:00 2001
From 4e1bfbe3a0a113fe3cf39336a9d7da4e8c2a21ea Mon Sep 17 00:00:00 2001
From: Jon Maloy <jmaloy@redhat.com>
Date: Mon, 5 Dec 2022 15:32:55 -0500
Subject: [PATCH 5/6] hw/display/qxl: Avoid buffer overrun in qxl_phys2virt
Subject: [PATCH 4/5] hw/display/qxl: Avoid buffer overrun in qxl_phys2virt
(CVE-2022-4144)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Jon Maloy <jmaloy@redhat.com>
RH-MergeRequest: 242: hw/display/qxl: Have qxl_log_command Return early if no log_cmd handler
RH-Bugzilla: 2152085
RH-MergeRequest: 240: hw/display/qxl: Have qxl_log_command Return early if no log_cmd handler
RH-Bugzilla: 2148545
RH-Acked-by: Gerd Hoffmann <kraxel@redhat.com>
RH-Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Commit: [4/5] 50e06fe6db196d327a68c7d7f35239404fbb39ee (jmaloy/jons-qemu-kvm)
RH-Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
RH-Commit: [4/5] afe53f8d9b31c6fd8211fe172173151f3255e67c (jmaloy/jons-qemu-kvm)
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=2152085
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=2148545
CVE: CVE-2022-4144
Upstream: Merged

14
SOURCES/kvm-hw-display-qxl-Document-qxl_phys2virt.patch
View File

@ -1,20 +1,20 @@
From ef0563a3c3f32680e0584821eccd9a205e371b34 Mon Sep 17 00:00:00 2001
From 068c531fb968ec04509b85f524d0745e6acf5449 Mon Sep 17 00:00:00 2001
From: Jon Maloy <jmaloy@redhat.com>
Date: Mon, 5 Dec 2022 15:32:55 -0500
Subject: [PATCH 3/6] hw/display/qxl: Document qxl_phys2virt()
Subject: [PATCH 2/5] hw/display/qxl: Document qxl_phys2virt()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Jon Maloy <jmaloy@redhat.com>
RH-MergeRequest: 242: hw/display/qxl: Have qxl_log_command Return early if no log_cmd handler
RH-Bugzilla: 2152085
RH-MergeRequest: 240: hw/display/qxl: Have qxl_log_command Return early if no log_cmd handler
RH-Bugzilla: 2148545
RH-Acked-by: Gerd Hoffmann <kraxel@redhat.com>
RH-Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Commit: [2/5] 8d1045449270a3aef4bc4b39c61da1592b83259a (jmaloy/jons-qemu-kvm)
RH-Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
RH-Commit: [2/5] f84c0b379022c527fc2508a242443d86454944c0 (jmaloy/jons-qemu-kvm)
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=2152085
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=2148545
CVE: CVE-2022-4144
Upstream: Merged

14
SOURCES/kvm-hw-display-qxl-Have-qxl_log_command-Return-early-if-.patch
View File

@ -1,21 +1,21 @@
From d5a0396f7b836603a409ab265798de010694815b Mon Sep 17 00:00:00 2001
From 5ec8d909d40fa04ef2c3572e01509a1866786070 Mon Sep 17 00:00:00 2001
From: Jon Maloy <jmaloy@redhat.com>
Date: Mon, 5 Dec 2022 15:32:55 -0500
Subject: [PATCH 2/6] hw/display/qxl: Have qxl_log_command Return early if no
Subject: [PATCH 1/5] hw/display/qxl: Have qxl_log_command Return early if no
log_cmd handler
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Jon Maloy <jmaloy@redhat.com>
RH-MergeRequest: 242: hw/display/qxl: Have qxl_log_command Return early if no log_cmd handler
RH-Bugzilla: 2152085
RH-MergeRequest: 240: hw/display/qxl: Have qxl_log_command Return early if no log_cmd handler
RH-Bugzilla: 2148545
RH-Acked-by: Gerd Hoffmann <kraxel@redhat.com>
RH-Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Commit: [1/5] 1016976223d919605be9b0ae8a5a71613d9fc19b (jmaloy/jons-qemu-kvm)
RH-Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
RH-Commit: [1/5] 33d94f40c46cccbc32d108d1035365917bf90356 (jmaloy/jons-qemu-kvm)
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=2152085
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=2148545
CVE: CVE-2022-4144
Upstream: Merged

14
SOURCES/kvm-hw-display-qxl-Pass-requested-buffer-size-to-qxl_phy.patch
View File

@ -1,21 +1,21 @@
From ac90823eccd05943a2ece5f7a8a9892d0c44e2a7 Mon Sep 17 00:00:00 2001
From 0e6bd3911c4971f575aac7e9cd726467b52fe544 Mon Sep 17 00:00:00 2001
From: Jon Maloy <jmaloy@redhat.com>
Date: Mon, 5 Dec 2022 15:32:55 -0500
Subject: [PATCH 4/6] hw/display/qxl: Pass requested buffer size to
Subject: [PATCH 3/5] hw/display/qxl: Pass requested buffer size to
qxl_phys2virt()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Jon Maloy <jmaloy@redhat.com>
RH-MergeRequest: 242: hw/display/qxl: Have qxl_log_command Return early if no log_cmd handler
RH-Bugzilla: 2152085
RH-MergeRequest: 240: hw/display/qxl: Have qxl_log_command Return early if no log_cmd handler
RH-Bugzilla: 2148545
RH-Acked-by: Gerd Hoffmann <kraxel@redhat.com>
RH-Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Commit: [3/5] 89de533fc1f5cc142cfa0ffd213d8683d009ac54 (jmaloy/jons-qemu-kvm)
RH-Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
RH-Commit: [3/5] 8e362d67fe7fef9eb457cfb15d75b298fed725c3 (jmaloy/jons-qemu-kvm)
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=2152085
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=2148545
CVE: CVE-2022-4144
Upstream: Merged

19
SOURCES/kvm-i386-do-kvm_put_msr_feature_control-first-thing-when.patch
View File

@ -1,16 +1,15 @@
From 1bd939d374ec2e994ff47c84e16fa3bc1323a0fd Mon Sep 17 00:00:00 2001
From f96220d64a31a4a52b2d132a503048579946f982 Mon Sep 17 00:00:00 2001
From: Vitaly Kuznetsov <vkuznets@redhat.com>
Date: Thu, 18 Aug 2022 17:01:13 +0200
Subject: [PATCH 2/2] i386: do kvm_put_msr_feature_control() first thing when
Subject: [PATCH 3/3] i386: do kvm_put_msr_feature_control() first thing when
vCPU is reset
RH-Author: Vitaly Kuznetsov <vkuznets@redhat.com>
RH-MergeRequest: 216: i386: fix 'system_reset' when the VM is in VMX root operation
RH-Bugzilla: 2116743
RH-Acked-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: Peter Xu <peterx@redhat.com>
RH-Commit: [2/2] f838a57f74487eb394794de00006d5d2b9e84344
RH-Author: Miroslav Rezanina <mrezanin@redhat.com>
RH-MergeRequest: 219: Synchronize qemu-6.2.0-20.el8.1 build from RHEL 8.7 to RHEL 8.8
RH-Bugzilla: 2125271
RH-Acked-by: Vitaly Kuznetsov <vkuznets@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [2/2] 08e1e67db96801e4a35aa6b60a93b2c2f1641220
kvm_put_sregs2() fails to reset 'locked' CR4/CR0 bits upon vCPU reset when
it is in VMX root operation. Do kvm_put_msr_feature_control() before
@ -64,5 +63,5 @@ index 81d729dc40..a06221d3e5 100644
if (level == KVM_PUT_FULL_STATE) {
--
2.31.1
2.35.3

19
SOURCES/kvm-i386-reset-KVM-nested-state-upon-CPU-reset.patch
View File

@ -1,15 +1,14 @@
From 4ad00e318f8afbee0e455cfbb6bc693c808d87f3 Mon Sep 17 00:00:00 2001
From 46e54544c3480658111d6f111d6c265dcea2e19b Mon Sep 17 00:00:00 2001
From: Vitaly Kuznetsov <vkuznets@redhat.com>
Date: Thu, 18 Aug 2022 17:01:12 +0200
Subject: [PATCH 1/2] i386: reset KVM nested state upon CPU reset
Subject: [PATCH 2/3] i386: reset KVM nested state upon CPU reset
RH-Author: Vitaly Kuznetsov <vkuznets@redhat.com>
RH-MergeRequest: 216: i386: fix 'system_reset' when the VM is in VMX root operation
RH-Bugzilla: 2116743
RH-Acked-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: Peter Xu <peterx@redhat.com>
RH-Commit: [1/2] 20d2dabeda74b8cd5135228980a2414e66dc64f3
RH-Author: Miroslav Rezanina <mrezanin@redhat.com>
RH-MergeRequest: 219: Synchronize qemu-6.2.0-20.el8.1 build from RHEL 8.7 to RHEL 8.8
RH-Bugzilla: 2125271
RH-Acked-by: Vitaly Kuznetsov <vkuznets@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [1/2] de4db7bceb6baaf69aec8b0ae9aa8887aa869e15
Make sure env->nested_state is cleaned up when a vCPU is reset, it may
be stale after an incoming migration, kvm_arch_put_registers() may
@ -91,5 +90,5 @@ index bd439e56ad..81d729dc40 100644
}
--
2.31.1
2.35.3

43
SOURCES/kvm-include-elf.h-add-s390x-note-types.patch Normal file
View File

@ -0,0 +1,43 @@
From 3fceb3b60a60c5008eecf99e45e269b757042b5a Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Mon, 17 Oct 2022 08:38:20 +0000
Subject: [PATCH 39/42] include/elf.h: add s390x note types
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [39/41] ebf0873744905abbe9cfc423a56c6d1b4f2ae936
Adding two s390x note types
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20221017083822.43118-9-frankja@linux.ibm.com>
(cherry picked from commit 5433669c7a1884cc0394c360148965edf7519884)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
include/elf.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/elf.h b/include/elf.h
index 811bf4a1cb..4edab8e5a2 100644
--- a/include/elf.h
+++ b/include/elf.h
@@ -1647,6 +1647,8 @@ typedef struct elf64_shdr {
#define NT_TASKSTRUCT 4
#define NT_AUXV 6
#define NT_PRXFPREG 0x46e62b7f /* copied from gdb5.1/include/elf/common.h */
+#define NT_S390_PV_CPU_DATA 0x30e /* s390 protvirt cpu dump data */
+#define NT_S390_RI_CB 0x30d /* s390 runtime instrumentation */
#define NT_S390_GS_CB 0x30b /* s390 guarded storage registers */
#define NT_S390_VXRS_HIGH 0x30a /* s390 vector registers 16-31 */
#define NT_S390_VXRS_LOW 0x309 /* s390 vector registers 0-15 (lower half) */
--
2.37.3

367
SOURCES/kvm-io-Add-support-for-MSG_PEEK-for-socket-channel.patch Normal file
View File

@ -0,0 +1,367 @@
From 88b5e059462a72ca758d84c0d4d0895a03baac50 Mon Sep 17 00:00:00 2001
From: "manish.mishra" <manish.mishra@nutanix.com>
Date: Tue, 20 Dec 2022 18:44:17 +0000
Subject: [PATCH 1/3] io: Add support for MSG_PEEK for socket channel
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Peter Xu <peterx@redhat.com>
RH-MergeRequest: 258: migration: Fix multifd crash due to channel disorder
RH-Bugzilla: 2137740
RH-Acked-by: quintela1 <quintela@redhat.com>
RH-Acked-by: Leonardo Brás <leobras@redhat.com>
RH-Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
RH-Commit: [1/2] 04fc6fae358599b8509f5355469d2e8720f01903
Conflicts:
io/channel-null.c
migration/channel-block.c
Because these two files do not exist in rhel8.8 tree, dropping the
changes.
MSG_PEEK peeks at the channel, The data is treated as unread and
the next read shall still return this data. This support is
currently added only for socket class. Extra parameter 'flags'
is added to io_readv calls to pass extra read flags like MSG_PEEK.
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Suggested-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: manish.mishra <manish.mishra@nutanix.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
(cherry picked from commit 84615a19ddf2bfb38d7b3a0d487d2397ee55e4f3)
Signed-off-by: Peter Xu <peterx@redhat.com>
---
chardev/char-socket.c | 4 ++--
include/io/channel.h | 6 ++++++
io/channel-buffer.c | 1 +
io/channel-command.c | 1 +
io/channel-file.c | 1 +
io/channel-socket.c | 19 ++++++++++++++++++-
io/channel-tls.c | 1 +
io/channel-websock.c | 1 +
io/channel.c | 16 ++++++++++++----
migration/rdma.c | 1 +
scsi/qemu-pr-helper.c | 2 +-
tests/qtest/tpm-emu.c | 2 +-
tests/unit/test-io-channel-socket.c | 1 +
util/vhost-user-server.c | 2 +-
14 files changed, 48 insertions(+), 10 deletions(-)
diff --git a/chardev/char-socket.c b/chardev/char-socket.c
index 836cfa0bc2..4cdf79e0c2 100644
--- a/chardev/char-socket.c
+++ b/chardev/char-socket.c
@@ -339,11 +339,11 @@ static ssize_t tcp_chr_recv(Chardev *chr, char *buf, size_t len)
if (qio_channel_has_feature(s->ioc, QIO_CHANNEL_FEATURE_FD_PASS)) {
ret = qio_channel_readv_full(s->ioc, &iov, 1,
&msgfds, &msgfds_num,
- NULL);
+ 0, NULL);
} else {
ret = qio_channel_readv_full(s->ioc, &iov, 1,
NULL, NULL,
- NULL);
+ 0, NULL);
}
if (ret == QIO_CHANNEL_ERR_BLOCK) {
diff --git a/include/io/channel.h b/include/io/channel.h
index c680ee7480..716235d496 100644
--- a/include/io/channel.h
+++ b/include/io/channel.h
@@ -34,6 +34,8 @@ OBJECT_DECLARE_TYPE(QIOChannel, QIOChannelClass,
#define QIO_CHANNEL_WRITE_FLAG_ZERO_COPY 0x1
+#define QIO_CHANNEL_READ_FLAG_MSG_PEEK 0x1
+
typedef enum QIOChannelFeature QIOChannelFeature;
enum QIOChannelFeature {
@@ -41,6 +43,7 @@ enum QIOChannelFeature {
QIO_CHANNEL_FEATURE_SHUTDOWN,
QIO_CHANNEL_FEATURE_LISTEN,
QIO_CHANNEL_FEATURE_WRITE_ZERO_COPY,
+ QIO_CHANNEL_FEATURE_READ_MSG_PEEK,
};
@@ -114,6 +117,7 @@ struct QIOChannelClass {
size_t niov,
int **fds,
size_t *nfds,
+ int flags,
Error **errp);
int (*io_close)(QIOChannel *ioc,
Error **errp);
@@ -188,6 +192,7 @@ void qio_channel_set_name(QIOChannel *ioc,
* @niov: the length of the @iov array
* @fds: pointer to an array that will received file handles
* @nfds: pointer filled with number of elements in @fds on return
+ * @flags: read flags (QIO_CHANNEL_READ_FLAG_*)
* @errp: pointer to a NULL-initialized error object
*
* Read data from the IO channel, storing it in the
@@ -224,6 +229,7 @@ ssize_t qio_channel_readv_full(QIOChannel *ioc,
size_t niov,
int **fds,
size_t *nfds,
+ int flags,
Error **errp);
diff --git a/io/channel-buffer.c b/io/channel-buffer.c
index bf52011be2..8096180f85 100644
--- a/io/channel-buffer.c
+++ b/io/channel-buffer.c
@@ -54,6 +54,7 @@ static ssize_t qio_channel_buffer_readv(QIOChannel *ioc,
size_t niov,
int **fds,
size_t *nfds,
+ int flags,
Error **errp)
{
QIOChannelBuffer *bioc = QIO_CHANNEL_BUFFER(ioc);
diff --git a/io/channel-command.c b/io/channel-command.c
index 5ff1691bad..2834413b3a 100644
--- a/io/channel-command.c
+++ b/io/channel-command.c
@@ -230,6 +230,7 @@ static ssize_t qio_channel_command_readv(QIOChannel *ioc,
size_t niov,
int **fds,
size_t *nfds,
+ int flags,
Error **errp)
{
QIOChannelCommand *cioc = QIO_CHANNEL_COMMAND(ioc);
diff --git a/io/channel-file.c b/io/channel-file.c
index 348a48545e..490f0e5d84 100644
--- a/io/channel-file.c
+++ b/io/channel-file.c
@@ -86,6 +86,7 @@ static ssize_t qio_channel_file_readv(QIOChannel *ioc,
size_t niov,
int **fds,
size_t *nfds,
+ int flags,
Error **errp)
{
QIOChannelFile *fioc = QIO_CHANNEL_FILE(ioc);
diff --git a/io/channel-socket.c b/io/channel-socket.c
index 6010ad7017..ca8b180b69 100644
--- a/io/channel-socket.c
+++ b/io/channel-socket.c
@@ -174,6 +174,9 @@ int qio_channel_socket_connect_sync(QIOChannelSocket *ioc,
}
#endif
+ qio_channel_set_feature(QIO_CHANNEL(ioc),
+ QIO_CHANNEL_FEATURE_READ_MSG_PEEK);
+
return 0;
}
@@ -407,6 +410,9 @@ qio_channel_socket_accept(QIOChannelSocket *ioc,
}
#endif /* WIN32 */
+ qio_channel_set_feature(QIO_CHANNEL(cioc),
+ QIO_CHANNEL_FEATURE_READ_MSG_PEEK);
+
trace_qio_channel_socket_accept_complete(ioc, cioc, cioc->fd);
return cioc;
@@ -497,6 +503,7 @@ static ssize_t qio_channel_socket_readv(QIOChannel *ioc,
size_t niov,
int **fds,
size_t *nfds,
+ int flags,
Error **errp)
{
QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
@@ -518,6 +525,10 @@ static ssize_t qio_channel_socket_readv(QIOChannel *ioc,
}
+ if (flags & QIO_CHANNEL_READ_FLAG_MSG_PEEK) {
+ sflags |= MSG_PEEK;
+ }
+
retry:
ret = recvmsg(sioc->fd, &msg, sflags);
if (ret < 0) {
@@ -625,11 +636,17 @@ static ssize_t qio_channel_socket_readv(QIOChannel *ioc,
size_t niov,
int **fds,
size_t *nfds,
+ int flags,
Error **errp)
{
QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
ssize_t done = 0;
ssize_t i;
+ int sflags = 0;
+
+ if (flags & QIO_CHANNEL_READ_FLAG_MSG_PEEK) {
+ sflags |= MSG_PEEK;
+ }
for (i = 0; i < niov; i++) {
ssize_t ret;
@@ -637,7 +654,7 @@ static ssize_t qio_channel_socket_readv(QIOChannel *ioc,
ret = recv(sioc->fd,
iov[i].iov_base,
iov[i].iov_len,
- 0);
+ sflags);
if (ret < 0) {
if (errno == EAGAIN) {
if (done) {
diff --git a/io/channel-tls.c b/io/channel-tls.c
index 4ce890a538..c730cb8ec5 100644
--- a/io/channel-tls.c
+++ b/io/channel-tls.c
@@ -260,6 +260,7 @@ static ssize_t qio_channel_tls_readv(QIOChannel *ioc,
size_t niov,
int **fds,
size_t *nfds,
+ int flags,
Error **errp)
{
QIOChannelTLS *tioc = QIO_CHANNEL_TLS(ioc);
diff --git a/io/channel-websock.c b/io/channel-websock.c
index 035dd6075b..13c94f2afe 100644
--- a/io/channel-websock.c
+++ b/io/channel-websock.c
@@ -1081,6 +1081,7 @@ static ssize_t qio_channel_websock_readv(QIOChannel *ioc,
size_t niov,
int **fds,
size_t *nfds,
+ int flags,
Error **errp)
{
QIOChannelWebsock *wioc = QIO_CHANNEL_WEBSOCK(ioc);
diff --git a/io/channel.c b/io/channel.c
index 0640941ac5..a8c7f11649 100644
--- a/io/channel.c
+++ b/io/channel.c
@@ -52,6 +52,7 @@ ssize_t qio_channel_readv_full(QIOChannel *ioc,
size_t niov,
int **fds,
size_t *nfds,
+ int flags,
Error **errp)
{
QIOChannelClass *klass = QIO_CHANNEL_GET_CLASS(ioc);
@@ -63,7 +64,14 @@ ssize_t qio_channel_readv_full(QIOChannel *ioc,
return -1;
}
- return klass->io_readv(ioc, iov, niov, fds, nfds, errp);
+ if ((flags & QIO_CHANNEL_READ_FLAG_MSG_PEEK) &&
+ !qio_channel_has_feature(ioc, QIO_CHANNEL_FEATURE_READ_MSG_PEEK)) {
+ error_setg_errno(errp, EINVAL,
+ "Channel does not support peek read");
+ return -1;
+ }
+
+ return klass->io_readv(ioc, iov, niov, fds, nfds, flags, errp);
}
@@ -146,7 +154,7 @@ int qio_channel_readv_full_all_eof(QIOChannel *ioc,
while ((nlocal_iov > 0) || local_fds) {
ssize_t len;
len = qio_channel_readv_full(ioc, local_iov, nlocal_iov, local_fds,
- local_nfds, errp);
+ local_nfds, 0, errp);
if (len == QIO_CHANNEL_ERR_BLOCK) {
if (qemu_in_coroutine()) {
qio_channel_yield(ioc, G_IO_IN);
@@ -284,7 +292,7 @@ ssize_t qio_channel_readv(QIOChannel *ioc,
size_t niov,
Error **errp)
{
- return qio_channel_readv_full(ioc, iov, niov, NULL, NULL, errp);
+ return qio_channel_readv_full(ioc, iov, niov, NULL, NULL, 0, errp);
}
@@ -303,7 +311,7 @@ ssize_t qio_channel_read(QIOChannel *ioc,
Error **errp)
{
struct iovec iov = { .iov_base = buf, .iov_len = buflen };
- return qio_channel_readv_full(ioc, &iov, 1, NULL, NULL, errp);
+ return qio_channel_readv_full(ioc, &iov, 1, NULL, NULL, 0, errp);
}
diff --git a/migration/rdma.c b/migration/rdma.c
index 54acd2000e..dcf98bd7f8 100644
--- a/migration/rdma.c
+++ b/migration/rdma.c
@@ -2917,6 +2917,7 @@ static ssize_t qio_channel_rdma_readv(QIOChannel *ioc,
size_t niov,
int **fds,
size_t *nfds,
+ int flags,
Error **errp)
{
QIOChannelRDMA *rioc = QIO_CHANNEL_RDMA(ioc);
diff --git a/scsi/qemu-pr-helper.c b/scsi/qemu-pr-helper.c
index f281daeced..12ec8e9368 100644
--- a/scsi/qemu-pr-helper.c
+++ b/scsi/qemu-pr-helper.c
@@ -612,7 +612,7 @@ static int coroutine_fn prh_read(PRHelperClient *client, void *buf, int sz,
iov.iov_base = buf;
iov.iov_len = sz;
n_read = qio_channel_readv_full(QIO_CHANNEL(client->ioc), &iov, 1,
- &fds, &nfds, errp);
+ &fds, &nfds, 0, errp);
if (n_read == QIO_CHANNEL_ERR_BLOCK) {
qio_channel_yield(QIO_CHANNEL(client->ioc), G_IO_IN);
diff --git a/tests/qtest/tpm-emu.c b/tests/qtest/tpm-emu.c
index 2994d1cf42..3cf1acaf7d 100644
--- a/tests/qtest/tpm-emu.c
+++ b/tests/qtest/tpm-emu.c
@@ -106,7 +106,7 @@ void *tpm_emu_ctrl_thread(void *data)
int *pfd = NULL;
size_t nfd = 0;
- qio_channel_readv_full(ioc, &iov, 1, &pfd, &nfd, &error_abort);
+ qio_channel_readv_full(ioc, &iov, 1, &pfd, &nfd, 0, &error_abort);
cmd = be32_to_cpu(cmd);
g_assert_cmpint(cmd, ==, CMD_SET_DATAFD);
g_assert_cmpint(nfd, ==, 1);
diff --git a/tests/unit/test-io-channel-socket.c b/tests/unit/test-io-channel-socket.c
index 6713886d02..de2930f203 100644
--- a/tests/unit/test-io-channel-socket.c
+++ b/tests/unit/test-io-channel-socket.c
@@ -452,6 +452,7 @@ static void test_io_channel_unix_fd_pass(void)
G_N_ELEMENTS(iorecv),
&fdrecv,
&nfdrecv,
+ 0,
&error_abort);
g_assert(nfdrecv == G_N_ELEMENTS(fdsend));
diff --git a/util/vhost-user-server.c b/util/vhost-user-server.c
index 783d847a6d..e6a9ef72b7 100644
--- a/util/vhost-user-server.c
+++ b/util/vhost-user-server.c
@@ -102,7 +102,7 @@ vu_message_read(VuDev *vu_dev, int conn_fd, VhostUserMsg *vmsg)
* qio_channel_readv_full may have short reads, keeping calling it
* until getting VHOST_USER_HDR_SIZE or 0 bytes in total
*/
- rc = qio_channel_readv_full(ioc, &iov, 1, &fds, &nfds, &local_err);
+ rc = qio_channel_readv_full(ioc, &iov, 1, &fds, &nfds, 0, &local_err);
if (rc < 0) {
if (rc == QIO_CHANNEL_ERR_BLOCK) {
assert(local_err == NULL);
--
2.37.3

290
SOURCES/kvm-kvm-Atomic-memslot-updates.patch Normal file
View File

@ -0,0 +1,290 @@
From 93ec857c46911b95ed8e3abc6a9d432ae847c084 Mon Sep 17 00:00:00 2001
From: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Date: Mon, 16 Jan 2023 07:51:56 -0500
Subject: [PATCH 06/11] kvm: Atomic memslot updates
RH-Author: Emanuele Giuseppe Esposito <eesposit@redhat.com>
RH-MergeRequest: 247: accel: introduce accelerator blocker API
RH-Bugzilla: 2161188
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Acked-by: Vitaly Kuznetsov <vkuznets@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [3/3] 520e41c0f58066a7381a5f6b32b81bc01cce51c0
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2161188
commit f39b7d2b96e3e73c01bb678cd096f7baf0b9ab39
Author: David Hildenbrand <david@redhat.com>
Date: Fri Nov 11 10:47:58 2022 -0500
kvm: Atomic memslot updates
If we update an existing memslot (e.g., resize, split), we temporarily
remove the memslot to re-add it immediately afterwards. These updates
are not atomic, especially not for KVM VCPU threads, such that we can
get spurious faults.
Let's inhibit most KVM ioctls while performing relevant updates, such
that we can perform the update just as if it would happen atomically
without additional kernel support.
We capture the add/del changes and apply them in the notifier commit
stage instead. There, we can check for overlaps and perform the ioctl
inhibiting only if really required (-> overlap).
To keep things simple we don't perform additional checks that wouldn't
actually result in an overlap -- such as !RAM memory regions in some
cases (see kvm_set_phys_mem()).
To minimize cache-line bouncing, use a separate indicator
(in_ioctl_lock) per CPU. Also, make sure to hold the kvm_slots_lock
while performing both actions (removing+re-adding).
We have to wait until all IOCTLs were exited and block new ones from
getting executed.
This approach cannot result in a deadlock as long as the inhibitor does
not hold any locks that might hinder an IOCTL from getting finished and
exited - something fairly unusual. The inhibitor will always hold the BQL.
AFAIKs, one possible candidate would be userfaultfd. If a page cannot be
placed (e.g., during postcopy), because we're waiting for a lock, or if the
userfaultfd thread cannot process a fault, because it is waiting for a
lock, there could be a deadlock. However, the BQL is not applicable here,
because any other guest memory access while holding the BQL would already
result in a deadlock.
Nothing else in the kernel should block forever and wait for userspace
intervention.
Note: pause_all_vcpus()/resume_all_vcpus() or
start_exclusive()/end_exclusive() cannot be used, as they either drop
the BQL or require to be called without the BQL - something inhibitors
cannot handle. We need a low-level locking mechanism that is
deadlock-free even when not releasing the BQL.
Signed-off-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Tested-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-Id: <20221111154758.1372674-4-eesposit@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Conflicts:
accel/kvm/kvm-all.c: include "sysemu/dirtylimit.h" is missing in
rhel 8.8.0
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
---
accel/kvm/kvm-all.c | 101 ++++++++++++++++++++++++++++++++++-----
include/sysemu/kvm_int.h | 8 ++++
2 files changed, 98 insertions(+), 11 deletions(-)
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 221aadfda7..3b7bc39823 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -31,6 +31,7 @@
#include "sysemu/kvm_int.h"
#include "sysemu/runstate.h"
#include "sysemu/cpus.h"
+#include "sysemu/accel-blocker.h"
#include "qemu/bswap.h"
#include "exec/memory.h"
#include "exec/ram_addr.h"
@@ -45,6 +46,7 @@
#include "qemu/guest-random.h"
#include "sysemu/hw_accel.h"
#include "kvm-cpus.h"
+#include "qemu/range.h"
#include "hw/boards.h"
@@ -1334,6 +1336,7 @@ void kvm_set_max_memslot_size(hwaddr max_slot_size)
kvm_max_slot_size = max_slot_size;
}
+/* Called with KVMMemoryListener.slots_lock held */
static void kvm_set_phys_mem(KVMMemoryListener *kml,
MemoryRegionSection *section, bool add)
{
@@ -1368,14 +1371,12 @@ static void kvm_set_phys_mem(KVMMemoryListener *kml,
ram = memory_region_get_ram_ptr(mr) + mr_offset;
ram_start_offset = memory_region_get_ram_addr(mr) + mr_offset;
- kvm_slots_lock();
-
if (!add) {
do {
slot_size = MIN(kvm_max_slot_size, size);
mem = kvm_lookup_matching_slot(kml, start_addr, slot_size);
if (!mem) {
- goto out;
+ return;
}
if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) {
/*
@@ -1413,7 +1414,7 @@ static void kvm_set_phys_mem(KVMMemoryListener *kml,
start_addr += slot_size;
size -= slot_size;
} while (size);
- goto out;
+ return;
}
/* register the new slot */
@@ -1438,9 +1439,6 @@ static void kvm_set_phys_mem(KVMMemoryListener *kml,
ram += slot_size;
size -= slot_size;
} while (size);
-
-out:
- kvm_slots_unlock();
}
static void *kvm_dirty_ring_reaper_thread(void *data)
@@ -1492,18 +1490,95 @@ static void kvm_region_add(MemoryListener *listener,
MemoryRegionSection *section)
{
KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener);
+ KVMMemoryUpdate *update;
+
+ update = g_new0(KVMMemoryUpdate, 1);
+ update->section = *section;
- memory_region_ref(section->mr);
- kvm_set_phys_mem(kml, section, true);
+ QSIMPLEQ_INSERT_TAIL(&kml->transaction_add, update, next);
}
static void kvm_region_del(MemoryListener *listener,
MemoryRegionSection *section)
{
KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener);
+ KVMMemoryUpdate *update;
+
+ update = g_new0(KVMMemoryUpdate, 1);
+ update->section = *section;
+
+ QSIMPLEQ_INSERT_TAIL(&kml->transaction_del, update, next);
+}
+
+static void kvm_region_commit(MemoryListener *listener)
+{
+ KVMMemoryListener *kml = container_of(listener, KVMMemoryListener,
+ listener);
+ KVMMemoryUpdate *u1, *u2;
+ bool need_inhibit = false;
+
+ if (QSIMPLEQ_EMPTY(&kml->transaction_add) &&
+ QSIMPLEQ_EMPTY(&kml->transaction_del)) {
+ return;
+ }
+
+ /*
+ * We have to be careful when regions to add overlap with ranges to remove.
+ * We have to simulate atomic KVM memslot updates by making sure no ioctl()
+ * is currently active.
+ *
+ * The lists are order by addresses, so it's easy to find overlaps.
+ */
+ u1 = QSIMPLEQ_FIRST(&kml->transaction_del);
+ u2 = QSIMPLEQ_FIRST(&kml->transaction_add);
+ while (u1 && u2) {
+ Range r1, r2;
+
+ range_init_nofail(&r1, u1->section.offset_within_address_space,
+ int128_get64(u1->section.size));
+ range_init_nofail(&r2, u2->section.offset_within_address_space,
+ int128_get64(u2->section.size));
+
+ if (range_overlaps_range(&r1, &r2)) {
+ need_inhibit = true;
+ break;
+ }
+ if (range_lob(&r1) < range_lob(&r2)) {
+ u1 = QSIMPLEQ_NEXT(u1, next);
+ } else {
+ u2 = QSIMPLEQ_NEXT(u2, next);
+ }
+ }
+
+ kvm_slots_lock();
+ if (need_inhibit) {
+ accel_ioctl_inhibit_begin();
+ }
+
+ /* Remove all memslots before adding the new ones. */
+ while (!QSIMPLEQ_EMPTY(&kml->transaction_del)) {
+ u1 = QSIMPLEQ_FIRST(&kml->transaction_del);
+ QSIMPLEQ_REMOVE_HEAD(&kml->transaction_del, next);
- kvm_set_phys_mem(kml, section, false);
- memory_region_unref(section->mr);
+ kvm_set_phys_mem(kml, &u1->section, false);
+ memory_region_unref(u1->section.mr);
+
+ g_free(u1);
+ }
+ while (!QSIMPLEQ_EMPTY(&kml->transaction_add)) {
+ u1 = QSIMPLEQ_FIRST(&kml->transaction_add);
+ QSIMPLEQ_REMOVE_HEAD(&kml->transaction_add, next);
+
+ memory_region_ref(u1->section.mr);
+ kvm_set_phys_mem(kml, &u1->section, true);
+
+ g_free(u1);
+ }
+
+ if (need_inhibit) {
+ accel_ioctl_inhibit_end();
+ }
+ kvm_slots_unlock();
}
static void kvm_log_sync(MemoryListener *listener,
@@ -1647,8 +1722,12 @@ void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml,
kml->slots[i].slot = i;
}
+ QSIMPLEQ_INIT(&kml->transaction_add);
+ QSIMPLEQ_INIT(&kml->transaction_del);
+
kml->listener.region_add = kvm_region_add;
kml->listener.region_del = kvm_region_del;
+ kml->listener.commit = kvm_region_commit;
kml->listener.log_start = kvm_log_start;
kml->listener.log_stop = kvm_log_stop;
kml->listener.priority = 10;
diff --git a/include/sysemu/kvm_int.h b/include/sysemu/kvm_int.h
index 1f5487d9b7..7e18c0a3c0 100644
--- a/include/sysemu/kvm_int.h
+++ b/include/sysemu/kvm_int.h
@@ -11,6 +11,7 @@
#include "exec/memory.h"
#include "qemu/accel.h"
+#include "qemu/queue.h"
#include "sysemu/kvm.h"
typedef struct KVMSlot
@@ -30,10 +31,17 @@ typedef struct KVMSlot
ram_addr_t ram_start_offset;
} KVMSlot;
+typedef struct KVMMemoryUpdate {
+ QSIMPLEQ_ENTRY(KVMMemoryUpdate) next;
+ MemoryRegionSection section;
+} KVMMemoryUpdate;
+
typedef struct KVMMemoryListener {
MemoryListener listener;
KVMSlot *slots;
int as_id;
+ QSIMPLEQ_HEAD(, KVMMemoryUpdate) transaction_add;
+ QSIMPLEQ_HEAD(, KVMMemoryUpdate) transaction_del;
} KVMMemoryListener;
void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml,
--
2.37.3

13
SOURCES/kvm-migration-Read-state-once.patch
View File

@ -1,15 +1,16 @@
From 70d9e1e5940c9680f574124fe8cc02e4ce97f790 Mon Sep 17 00:00:00 2001
From 34eae2d7ef928a7e0e10cc30fe76839c005998eb Mon Sep 17 00:00:00 2001
From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Date: Wed, 13 Apr 2022 12:33:29 +0100
Subject: [PATCH] migration: Read state once
Subject: [PATCH 07/11] migration: Read state once
RH-Author: Dr. David Alan Gilbert <dgilbert@redhat.com>
RH-MergeRequest: 252: migration: Read state once
RH-Bugzilla: 2168217
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
RH-MergeRequest: 249: migration: Read state once
RH-Bugzilla: 2074205
RH-Acked-by: Peter Xu <peterx@redhat.com>
RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Acked-by: quintela1 <quintela@redhat.com>
RH-Commit: [1/1] 3f707ccf62e5ac2973f7e8816c50cc48e0bd646c
RH-Commit: [1/1] 9aa47b492a646fce4e66ebd9b7d7a85286d16051
The 'status' field for the migration is updated normally using
an atomic operation from the migration thread.

296
SOURCES/kvm-migration-check-magic-value-for-deciding-the-mapping.patch Normal file
View File

@ -0,0 +1,296 @@
From f21a343af4b4d0c6e5181ae0abd0f6280dc8296c Mon Sep 17 00:00:00 2001
From: "manish.mishra" <manish.mishra@nutanix.com>
Date: Tue, 20 Dec 2022 18:44:18 +0000
Subject: [PATCH 2/3] migration: check magic value for deciding the mapping of
channels
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Peter Xu <peterx@redhat.com>
RH-MergeRequest: 258: migration: Fix multifd crash due to channel disorder
RH-Bugzilla: 2137740
RH-Acked-by: quintela1 <quintela@redhat.com>
RH-Acked-by: Leonardo Brás <leobras@redhat.com>
RH-Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
RH-Commit: [2/2] f97bebef3d3e372cfd660e5ddb6cffba791840d2
Conflicts:
migration/migration.c
migration/multifd.c
migration/postcopy-ram.c
migration/postcopy-ram.h
There're a bunch of conflicts due to missing upstream patches on
e.g. on qemufile reworks, postcopy preempt. We don't plan to have
preempt in rhel8 at all, probably the same as the rest.
Current logic assumes that channel connections on the destination side are
always established in the same order as the source and the first one will
always be the main channel followed by the multifid or post-copy
preemption channel. This may not be always true, as even if a channel has a
connection established on the source side it can be in the pending state on
the destination side and a newer connection can be established first.
Basically causing out of order mapping of channels on the destination side.
Currently, all channels except post-copy preempt send a magic number, this
patch uses that magic number to decide the type of channel. This logic is
applicable only for precopy(multifd) live migration, as mentioned, the
post-copy preempt channel does not send any magic number. Also, tls live
migrations already does tls handshake before creating other channels, so
this issue is not possible with tls, hence this logic is avoided for tls
live migrations. This patch uses read peek to check the magic number of
channels so that current data/control stream management remains
un-effected.
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Suggested-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: manish.mishra <manish.mishra@nutanix.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
(cherry picked from commit 6720c2b32725e6ac404f22851a0ecd0a71d0cbe2)
Signed-off-by: Peter Xu <peterx@redhat.com>
---
migration/channel.c | 45 ++++++++++++++++++++++++++++++++++++++
migration/channel.h | 5 +++++
migration/migration.c | 51 +++++++++++++++++++++++++++++++------------
migration/multifd.c | 19 ++++++++--------
migration/multifd.h | 2 +-
5 files changed, 98 insertions(+), 24 deletions(-)
diff --git a/migration/channel.c b/migration/channel.c
index 086b5c0d8b..ee308fef23 100644
--- a/migration/channel.c
+++ b/migration/channel.c
@@ -98,3 +98,48 @@ void migration_channel_connect(MigrationState *s,
g_free(s->hostname);
error_free(error);
}
+
+
+/**
+ * @migration_channel_read_peek - Peek at migration channel, without
+ * actually removing it from channel buffer.
+ *
+ * @ioc: the channel object
+ * @buf: the memory region to read data into
+ * @buflen: the number of bytes to read in @buf
+ * @errp: pointer to a NULL-initialized error object
+ *
+ * Returns 0 if successful, returns -1 and sets @errp if fails.
+ */
+int migration_channel_read_peek(QIOChannel *ioc,
+ const char *buf,
+ const size_t buflen,
+ Error **errp)
+{
+ ssize_t len = 0;
+ struct iovec iov = { .iov_base = (char *)buf, .iov_len = buflen };
+
+ while (true) {
+ len = qio_channel_readv_full(ioc, &iov, 1, NULL, NULL,
+ QIO_CHANNEL_READ_FLAG_MSG_PEEK, errp);
+
+ if (len <= 0 && len != QIO_CHANNEL_ERR_BLOCK) {
+ error_setg(errp,
+ "Failed to peek at channel");
+ return -1;
+ }
+
+ if (len == buflen) {
+ break;
+ }
+
+ /* 1ms sleep. */
+ if (qemu_in_coroutine()) {
+ qemu_co_sleep_ns(QEMU_CLOCK_REALTIME, 1000000);
+ } else {
+ g_usleep(1000);
+ }
+ }
+
+ return 0;
+}
diff --git a/migration/channel.h b/migration/channel.h
index 67a461c28a..5bdb8208a7 100644
--- a/migration/channel.h
+++ b/migration/channel.h
@@ -24,4 +24,9 @@ void migration_channel_connect(MigrationState *s,
QIOChannel *ioc,
const char *hostname,
Error *error_in);
+
+int migration_channel_read_peek(QIOChannel *ioc,
+ const char *buf,
+ const size_t buflen,
+ Error **errp);
#endif
diff --git a/migration/migration.c b/migration/migration.c
index d8b24a2c91..0885549de0 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -32,6 +32,7 @@
#include "savevm.h"
#include "qemu-file-channel.h"
#include "qemu-file.h"
+#include "channel.h"
#include "migration/vmstate.h"
#include "block/block.h"
#include "qapi/error.h"
@@ -637,10 +638,6 @@ static bool migration_incoming_setup(QEMUFile *f, Error **errp)
{
MigrationIncomingState *mis = migration_incoming_get_current();
- if (multifd_load_setup(errp) != 0) {
- return false;
- }
-
if (!mis->from_src_file) {
mis->from_src_file = f;
}
@@ -701,10 +698,42 @@ void migration_fd_process_incoming(QEMUFile *f, Error **errp)
void migration_ioc_process_incoming(QIOChannel *ioc, Error **errp)
{
MigrationIncomingState *mis = migration_incoming_get_current();
+ bool default_channel = true;
+ uint32_t channel_magic = 0;
Error *local_err = NULL;
- bool start_migration;
+ int ret = 0;
- if (!mis->from_src_file) {
+ if (migrate_use_multifd() && !migrate_postcopy_ram() &&
+ qio_channel_has_feature(ioc, QIO_CHANNEL_FEATURE_READ_MSG_PEEK)) {
+ /*
+ * With multiple channels, it is possible that we receive channels
+ * out of order on destination side, causing incorrect mapping of
+ * source channels on destination side. Check channel MAGIC to
+ * decide type of channel. Please note this is best effort, postcopy
+ * preempt channel does not send any magic number so avoid it for
+ * postcopy live migration. Also tls live migration already does
+ * tls handshake while initializing main channel so with tls this
+ * issue is not possible.
+ */
+ ret = migration_channel_read_peek(ioc, (void *)&channel_magic,
+ sizeof(channel_magic), &local_err);
+
+ if (ret != 0) {
+ error_propagate(errp, local_err);
+ return;
+ }
+
+ default_channel = (channel_magic == cpu_to_be32(QEMU_VM_FILE_MAGIC));
+ } else {
+ default_channel = !mis->from_src_file;
+ }
+
+ if (multifd_load_setup(errp) != 0) {
+ error_setg(errp, "Failed to setup multifd channels");
+ return;
+ }
+
+ if (default_channel) {
/* The first connection (multifd may have multiple) */
QEMUFile *f = qemu_fopen_channel_input(ioc);
@@ -716,23 +745,17 @@ void migration_ioc_process_incoming(QIOChannel *ioc, Error **errp)
if (!migration_incoming_setup(f, errp)) {
return;
}
-
- /*
- * Common migration only needs one channel, so we can start
- * right now. Multifd needs more than one channel, we wait.
- */
- start_migration = !migrate_use_multifd();
} else {
/* Multiple connections */
assert(migrate_use_multifd());
- start_migration = multifd_recv_new_channel(ioc, &local_err);
+ multifd_recv_new_channel(ioc, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
}
- if (start_migration) {
+ if (migration_has_all_channels()) {
migration_incoming_process();
}
}
diff --git a/migration/multifd.c b/migration/multifd.c
index 7c16523e6b..75ac052d2f 100644
--- a/migration/multifd.c
+++ b/migration/multifd.c
@@ -1183,9 +1183,14 @@ int multifd_load_setup(Error **errp)
uint32_t page_count = MULTIFD_PACKET_SIZE / qemu_target_page_size();
uint8_t i;
- if (!migrate_use_multifd()) {
+ /*
+ * Return successfully if multiFD recv state is already initialised
+ * or multiFD is not enabled.
+ */
+ if (multifd_recv_state || !migrate_use_multifd()) {
return 0;
}
+
if (!migrate_multifd_is_allowed()) {
error_setg(errp, "multifd is not supported by current protocol");
return -1;
@@ -1244,11 +1249,9 @@ bool multifd_recv_all_channels_created(void)
/*
* Try to receive all multifd channels to get ready for the migration.
- * - Return true and do not set @errp when correctly receiving all channels;
- * - Return false and do not set @errp when correctly receiving the current one;
- * - Return false and set @errp when failing to receive the current channel.
+ * Sets @errp when failing to receive the current channel.
*/
-bool multifd_recv_new_channel(QIOChannel *ioc, Error **errp)
+void multifd_recv_new_channel(QIOChannel *ioc, Error **errp)
{
MultiFDRecvParams *p;
Error *local_err = NULL;
@@ -1261,7 +1264,7 @@ bool multifd_recv_new_channel(QIOChannel *ioc, Error **errp)
"failed to receive packet"
" via multifd channel %d: ",
qatomic_read(&multifd_recv_state->count));
- return false;
+ return;
}
trace_multifd_recv_new_channel(id);
@@ -1271,7 +1274,7 @@ bool multifd_recv_new_channel(QIOChannel *ioc, Error **errp)
id);
multifd_recv_terminate_threads(local_err);
error_propagate(errp, local_err);
- return false;
+ return;
}
p->c = ioc;
object_ref(OBJECT(ioc));
@@ -1282,6 +1285,4 @@ bool multifd_recv_new_channel(QIOChannel *ioc, Error **errp)
qemu_thread_create(&p->thread, p->name, multifd_recv_thread, p,
QEMU_THREAD_JOINABLE);
qatomic_inc(&multifd_recv_state->count);
- return qatomic_read(&multifd_recv_state->count) ==
- migrate_multifd_channels();
}
diff --git a/migration/multifd.h b/migration/multifd.h
index 11d5e273e6..9c0a2a0701 100644
--- a/migration/multifd.h
+++ b/migration/multifd.h
@@ -20,7 +20,7 @@ void multifd_save_cleanup(void);
int multifd_load_setup(Error **errp);
int multifd_load_cleanup(Error **errp);
bool multifd_recv_all_channels_created(void);
-bool multifd_recv_new_channel(QIOChannel *ioc, Error **errp);
+void multifd_recv_new_channel(QIOChannel *ioc, Error **errp);
void multifd_recv_sync_main(void);
int multifd_send_sync_main(QEMUFile *f);
int multifd_queue_page(QEMUFile *f, RAMBlock *block, ram_addr_t offset);
--
2.37.3

55
SOURCES/kvm-physmem-add-missing-memory-barrier.patch Normal file
View File

@ -0,0 +1,55 @@
From 01c09f31978154f0d2fd699621ae958a8c3ea2a5 Mon Sep 17 00:00:00 2001
From: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Date: Thu, 9 Mar 2023 08:15:24 -0500
Subject: [PATCH 08/13] physmem: add missing memory barrier
RH-Author: Emanuele Giuseppe Esposito <eesposit@redhat.com>
RH-MergeRequest: 263: qatomic: add smp_mb__before/after_rmw()
RH-Bugzilla: 2168472
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Eric Auger <eric.auger@redhat.com>
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Commit: [8/10] f6a9659f7cf40b78de6e85e4a7c06842273aa770
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2168472
commit 33828ca11da08436e1b32f3e79dabce3061a0427
Author: Paolo Bonzini <pbonzini@redhat.com>
Date: Fri Mar 3 14:36:32 2023 +0100
physmem: add missing memory barrier
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
---
softmmu/physmem.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/softmmu/physmem.c b/softmmu/physmem.c
index 4d0ef5f92f..2b96fad302 100644
--- a/softmmu/physmem.c
+++ b/softmmu/physmem.c
@@ -3087,6 +3087,8 @@ void cpu_register_map_client(QEMUBH *bh)
qemu_mutex_lock(&map_client_list_lock);
client->bh = bh;
QLIST_INSERT_HEAD(&map_client_list, client, link);
+ /* Write map_client_list before reading in_use. */
+ smp_mb();
if (!qatomic_read(&bounce.in_use)) {
cpu_notify_map_clients_locked();
}
@@ -3279,6 +3281,7 @@ void address_space_unmap(AddressSpace *as, void *buffer, hwaddr len,
qemu_vfree(bounce.buffer);
bounce.buffer = NULL;
memory_region_unref(bounce.mr);
+ /* Clear in_use before reading map_client_list. */
qatomic_mb_set(&bounce.in_use, false);
cpu_notify_map_clients();
}
--
2.37.3

177
SOURCES/kvm-qatomic-add-smp_mb__before-after_rmw.patch Normal file
View File

@ -0,0 +1,177 @@
From e7d0e29d1962092af58d0445439671a6e1d91f71 Mon Sep 17 00:00:00 2001
From: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Date: Thu, 9 Mar 2023 08:10:33 -0500
Subject: [PATCH 02/13] qatomic: add smp_mb__before/after_rmw()
RH-Author: Emanuele Giuseppe Esposito <eesposit@redhat.com>
RH-MergeRequest: 263: qatomic: add smp_mb__before/after_rmw()
RH-Bugzilla: 2168472
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Eric Auger <eric.auger@redhat.com>
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Commit: [2/10] 1f87eb3157abcf23f020881cedce42f76497f348
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2168472
commit ff00bed1897c3d27adc5b0cec6f6eeb5a7d13176
Author: Paolo Bonzini <pbonzini@redhat.com>
Date: Thu Mar 2 11:10:56 2023 +0100
qatomic: add smp_mb__before/after_rmw()
On ARM, seqcst loads and stores (which QEMU does not use) are compiled
respectively as LDAR and STLR instructions. Even though LDAR is
also used for load-acquire operations, it also waits for all STLRs to
leave the store buffer. Thus, LDAR and STLR alone are load-acquire
and store-release operations, but LDAR also provides store-against-load
ordering as long as the previous store is a STLR.
Compare this to ARMv7, where store-release is DMB+STR and load-acquire
is LDR+DMB, but an additional DMB is needed between store-seqcst and
load-seqcst (e.g. DMB+STR+DMB+LDR+DMB); or with x86, where MOV provides
load-acquire and store-release semantics and the two can be reordered.
Likewise, on ARM sequentially consistent read-modify-write operations only
need to use LDAXR and STLXR respectively for the load and the store, while
on x86 they need to use the stronger LOCK prefix.
In a strange twist of events, however, the _stronger_ semantics
of the ARM instructions can end up causing bugs on ARM, not on x86.
The problems occur when seqcst atomics are mixed with relaxed atomics.
QEMU's atomics try to bridge the Linux API (that most of the developers
are familiar with) and the C11 API, and the two have a substantial
difference:
- in Linux, strongly-ordered atomics such as atomic_add_return() affect
the global ordering of _all_ memory operations, including for example
READ_ONCE()/WRITE_ONCE()
- in C11, sequentially consistent atomics (except for seq-cst fences)
only affect the ordering of sequentially consistent operations.
In particular, since relaxed loads are done with LDR on ARM, they are
not ordered against seqcst stores (which are done with STLR).
QEMU implements high-level synchronization primitives with the idea that
the primitives contain the necessary memory barriers, and the callers can
use relaxed atomics (qatomic_read/qatomic_set) or even regular accesses.
This is very much incompatible with the C11 view that seqcst accesses
are only ordered against other seqcst accesses, and requires using seqcst
fences as in the following example:
qatomic_set(&y, 1); qatomic_set(&x, 1);
smp_mb(); smp_mb();
... qatomic_read(&x) ... ... qatomic_read(&y) ...
When a qatomic_*() read-modify write operation is used instead of one
or both stores, developers that are more familiar with the Linux API may
be tempted to omit the smp_mb(), which will work on x86 but not on ARM.
This nasty difference between Linux and C11 read-modify-write operations
has already caused issues in util/async.c and more are being found.
Provide something similar to Linux smp_mb__before/after_atomic(); this
has the double function of documenting clearly why there is a memory
barrier, and avoiding a double barrier on x86 and s390x systems.
The new macro can already be put to use in qatomic_mb_set().
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
---
docs/devel/atomics.rst | 26 +++++++++++++++++++++-----
include/qemu/atomic.h | 17 ++++++++++++++++-
2 files changed, 37 insertions(+), 6 deletions(-)
diff --git a/docs/devel/atomics.rst b/docs/devel/atomics.rst
index 52baa0736d..10fbfc58bb 100644
--- a/docs/devel/atomics.rst
+++ b/docs/devel/atomics.rst
@@ -25,7 +25,8 @@ provides macros that fall in three camps:
- weak atomic access and manual memory barriers: ``qatomic_read()``,
``qatomic_set()``, ``smp_rmb()``, ``smp_wmb()``, ``smp_mb()``,
- ``smp_mb_acquire()``, ``smp_mb_release()``, ``smp_read_barrier_depends()``;
+ ``smp_mb_acquire()``, ``smp_mb_release()``, ``smp_read_barrier_depends()``,
+ ``smp_mb__before_rmw()``, ``smp_mb__after_rmw()``;
- sequentially consistent atomic access: everything else.
@@ -470,7 +471,7 @@ and memory barriers, and the equivalents in QEMU:
sequential consistency.
- in QEMU, ``qatomic_read()`` and ``qatomic_set()`` do not participate in
- the total ordering enforced by sequentially-consistent operations.
+ the ordering enforced by read-modify-write operations.
This is because QEMU uses the C11 memory model. The following example
is correct in Linux but not in QEMU:
@@ -486,9 +487,24 @@ and memory barriers, and the equivalents in QEMU:
because the read of ``y`` can be moved (by either the processor or the
compiler) before the write of ``x``.
- Fixing this requires an ``smp_mb()`` memory barrier between the write
- of ``x`` and the read of ``y``. In the common case where only one thread
- writes ``x``, it is also possible to write it like this:
+ Fixing this requires a full memory barrier between the write of ``x`` and
+ the read of ``y``. QEMU provides ``smp_mb__before_rmw()`` and
+ ``smp_mb__after_rmw()``; they act both as an optimization,
+ avoiding the memory barrier on processors where it is unnecessary,
+ and as a clarification of this corner case of the C11 memory model:
+
+ +--------------------------------+
+ | QEMU (correct) |
+ +================================+
+ | :: |
+ | |
+ | a = qatomic_fetch_add(&x, 2);|
+ | smp_mb__after_rmw(); |
+ | b = qatomic_read(&y); |
+ +--------------------------------+
+
+ In the common case where only one thread writes ``x``, it is also possible
+ to write it like this:
+--------------------------------+
| QEMU (correct) |
diff --git a/include/qemu/atomic.h b/include/qemu/atomic.h
index 112a29910b..7855443cab 100644
--- a/include/qemu/atomic.h
+++ b/include/qemu/atomic.h
@@ -243,6 +243,20 @@
#define smp_wmb() smp_mb_release()
#define smp_rmb() smp_mb_acquire()
+/*
+ * SEQ_CST is weaker than the older __sync_* builtins and Linux
+ * kernel read-modify-write atomics. Provide a macro to obtain
+ * the same semantics.
+ */
+#if !defined(QEMU_SANITIZE_THREAD) && \
+ (defined(__i386__) || defined(__x86_64__) || defined(__s390x__))
+# define smp_mb__before_rmw() signal_barrier()
+# define smp_mb__after_rmw() signal_barrier()
+#else
+# define smp_mb__before_rmw() smp_mb()
+# define smp_mb__after_rmw() smp_mb()
+#endif
+
/* qatomic_mb_read/set semantics map Java volatile variables. They are
* less expensive on some platforms (notably POWER) than fully
* sequentially consistent operations.
@@ -257,7 +271,8 @@
#if !defined(__SANITIZE_THREAD__) && \
(defined(__i386__) || defined(__x86_64__) || defined(__s390x__))
/* This is more efficient than a store plus a fence. */
-# define qatomic_mb_set(ptr, i) ((void)qatomic_xchg(ptr, i))
+# define qatomic_mb_set(ptr, i) \
+ ({ (void)qatomic_xchg(ptr, i); smp_mb__after_rmw(); })
#else
# define qatomic_mb_set(ptr, i) \
({ qatomic_store_release(ptr, i); smp_mb(); })
--
2.37.3

67
SOURCES/kvm-qcow2-Fix-theoretical-corruption-in-store_bitmap-err.patch Normal file
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@ -0,0 +1,67 @@
From 06c73c4b57dd1f47f819d719a63eb39fbe799304 Mon Sep 17 00:00:00 2001
From: Kevin Wolf <kwolf@redhat.com>
Date: Thu, 12 Jan 2023 20:14:51 +0100
Subject: [PATCH 1/4] qcow2: Fix theoretical corruption in store_bitmap() error
path
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Kevin Wolf <kwolf@redhat.com>
RH-MergeRequest: 251: qemu-img: Fix exit code for errors closing the image
RH-Bugzilla: 2147617
RH-Acked-by: Hanna Czenczek <hreitz@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
RH-Commit: [1/4] d0a26bed7b16db41e7baee1f8f2b3ae54e52dd52
In order to write the bitmap table to the image file, it is converted to
big endian. If the write fails, it is passed to clear_bitmap_table() to
free all of the clusters it had allocated before. However, if we don't
convert it back to native endianness first, we'll free things at a wrong
offset.
In practical terms, the offsets will be so high that we won't actually
free any allocated clusters, but just run into an error, but in theory
this can cause image corruption.
Cc: qemu-stable@nongnu.org
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230112191454.169353-2-kwolf@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit b03dd9613bcf8fe948581b2b3585510cb525c382)
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
block/qcow2-bitmap.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/block/qcow2-bitmap.c b/block/qcow2-bitmap.c
index 8fb4731551..869069415c 100644
--- a/block/qcow2-bitmap.c
+++ b/block/qcow2-bitmap.c
@@ -115,7 +115,7 @@ static int update_header_sync(BlockDriverState *bs)
return bdrv_flush(bs->file->bs);
}
-static inline void bitmap_table_to_be(uint64_t *bitmap_table, size_t size)
+static inline void bitmap_table_bswap_be(uint64_t *bitmap_table, size_t size)
{
size_t i;
@@ -1401,9 +1401,10 @@ static int store_bitmap(BlockDriverState *bs, Qcow2Bitmap *bm, Error **errp)
goto fail;
}
- bitmap_table_to_be(tb, tb_size);
+ bitmap_table_bswap_be(tb, tb_size);
ret = bdrv_pwrite(bs->file, tb_offset, tb, tb_size * sizeof(tb[0]));
if (ret < 0) {
+ bitmap_table_bswap_be(tb, tb_size);
error_setg_errno(errp, -ret, "Failed to write bitmap '%s' to file",
bm_name);
goto fail;
--
2.37.3

75
SOURCES/kvm-qemu-coroutine-lock-add-smp_mb__after_rmw.patch Normal file
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@ -0,0 +1,75 @@
From 2f03293910f3ac559f37d45c95325ae29638003a Mon Sep 17 00:00:00 2001
From: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Date: Thu, 9 Mar 2023 08:15:14 -0500
Subject: [PATCH 07/13] qemu-coroutine-lock: add smp_mb__after_rmw()
RH-Author: Emanuele Giuseppe Esposito <eesposit@redhat.com>
RH-MergeRequest: 263: qatomic: add smp_mb__before/after_rmw()
RH-Bugzilla: 2168472
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Eric Auger <eric.auger@redhat.com>
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Commit: [7/10] 9cf1b6d3b0dd154489e75ad54a3000ea58983960
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2168472
commit e3a3b6ec8169eab2feb241b4982585001512cd55
Author: Paolo Bonzini <pbonzini@redhat.com>
Date: Fri Mar 3 10:52:59 2023 +0100
qemu-coroutine-lock: add smp_mb__after_rmw()
mutex->from_push and mutex->handoff in qemu-coroutine-lock implement
the familiar pattern:
write a write b
smp_mb() smp_mb()
read b read a
The memory barrier is required by the C memory model even after a
SEQ_CST read-modify-write operation such as QSLIST_INSERT_HEAD_ATOMIC.
Add it and avoid the unclear qatomic_mb_read() operation.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
---
util/qemu-coroutine-lock.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/util/qemu-coroutine-lock.c b/util/qemu-coroutine-lock.c
index 2669403839..a03ed0e664 100644
--- a/util/qemu-coroutine-lock.c
+++ b/util/qemu-coroutine-lock.c
@@ -206,10 +206,16 @@ static void coroutine_fn qemu_co_mutex_lock_slowpath(AioContext *ctx,
trace_qemu_co_mutex_lock_entry(mutex, self);
push_waiter(mutex, &w);
+ /*
+ * Add waiter before reading mutex->handoff. Pairs with qatomic_mb_set
+ * in qemu_co_mutex_unlock.
+ */
+ smp_mb__after_rmw();
+
/* This is the "Responsibility Hand-Off" protocol; a lock() picks from
* a concurrent unlock() the responsibility of waking somebody up.
*/
- old_handoff = qatomic_mb_read(&mutex->handoff);
+ old_handoff = qatomic_read(&mutex->handoff);
if (old_handoff &&
has_waiters(mutex) &&
qatomic_cmpxchg(&mutex->handoff, old_handoff, 0) == old_handoff) {
@@ -308,6 +314,7 @@ void coroutine_fn qemu_co_mutex_unlock(CoMutex *mutex)
}
our_handoff = mutex->sequence;
+ /* Set handoff before checking for waiters. */
qatomic_mb_set(&mutex->handoff, our_handoff);
if (!has_waiters(mutex)) {
/* The concurrent lock has not added itself yet, so it
--
2.37.3

70
SOURCES/kvm-qemu-img-bitmap-Report-errors-while-closing-the-imag.patch Normal file
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@ -0,0 +1,70 @@
From 648193b48d8aeaded90fd657e3610d8040f505fc Mon Sep 17 00:00:00 2001
From: Kevin Wolf <kwolf@redhat.com>
Date: Thu, 12 Jan 2023 20:14:53 +0100
Subject: [PATCH 3/4] qemu-img bitmap: Report errors while closing the image
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Kevin Wolf <kwolf@redhat.com>
RH-MergeRequest: 251: qemu-img: Fix exit code for errors closing the image
RH-Bugzilla: 2147617
RH-Acked-by: Hanna Czenczek <hreitz@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
RH-Commit: [3/4] 8e13e09564718a0badd03af84f036246a46a0eba
blk_unref() can't report any errors that happen while closing the image.
For example, if qcow2 hits an -ENOSPC error while writing out dirty
bitmaps when it's closed, it prints error messages to stderr, but
'qemu-img bitmap' won't see any error return value and will therefore
look successful with exit code 0.
In order to fix this, manually inactivate the image first before calling
blk_unref(). This already performs the operations that would be most
likely to fail while closing the image, but it can still return errors.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1330
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230112191454.169353-4-kwolf@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit c5e477110dcb8ef4642dce399777c3dee68fa96c)
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
qemu-img.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/qemu-img.c b/qemu-img.c
index 18833f7d69..7d035c0c7f 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -4622,6 +4622,7 @@ static int img_bitmap(int argc, char **argv)
QSIMPLEQ_HEAD(, ImgBitmapAction) actions;
ImgBitmapAction *act, *act_next;
const char *op;
+ int inactivate_ret;
QSIMPLEQ_INIT(&actions);
@@ -4806,6 +4807,16 @@ static int img_bitmap(int argc, char **argv)
ret = 0;
out:
+ /*
+ * Manually inactivate the images first because this way we can know whether
+ * an error occurred. blk_unref() doesn't tell us about failures.
+ */
+ inactivate_ret = bdrv_inactivate_all();
+ if (inactivate_ret < 0) {
+ error_report("Error while closing the image: %s", strerror(-inactivate_ret));
+ ret = 1;
+ }
+
blk_unref(src);
blk_unref(blk);
qemu_opts_del(opts);
--
2.37.3

67
SOURCES/kvm-qemu-img-commit-Report-errors-while-closing-the-imag.patch Normal file
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@ -0,0 +1,67 @@
From 2396df7fe527567e8e78761ef24ea1057ef6fa48 Mon Sep 17 00:00:00 2001
From: Kevin Wolf <kwolf@redhat.com>
Date: Thu, 12 Jan 2023 20:14:52 +0100
Subject: [PATCH 2/4] qemu-img commit: Report errors while closing the image
RH-Author: Kevin Wolf <kwolf@redhat.com>
RH-MergeRequest: 251: qemu-img: Fix exit code for errors closing the image
RH-Bugzilla: 2147617
RH-Acked-by: Hanna Czenczek <hreitz@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
RH-Commit: [2/4] 28f95bf76d1d63e2b0bed0c2ba5206bd3e5ea4f8
blk_unref() can't report any errors that happen while closing the image.
For example, if qcow2 hits an -ENOSPC error while writing out dirty
bitmaps when it's closed, it prints error messages to stderr, but
'qemu-img commit' won't see any error return value and will therefore
look successful with exit code 0.
In order to fix this, manually inactivate the image first before calling
blk_unref(). This already performs the operations that would be most
likely to fail while closing the image, but it can still return errors.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230112191454.169353-3-kwolf@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit 44efba2d713aca076c411594d0c1a2b99155eeb3)
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
qemu-img.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/qemu-img.c b/qemu-img.c
index f036a1d428..18833f7d69 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -443,6 +443,11 @@ static BlockBackend *img_open(bool image_opts,
blk = img_open_file(filename, NULL, fmt, flags, writethrough, quiet,
force_share);
}
+
+ if (blk) {
+ blk_set_force_allow_inactivate(blk);
+ }
+
return blk;
}
@@ -1110,6 +1115,14 @@ unref_backing:
done:
qemu_progress_end();
+ /*
+ * Manually inactivate the image first because this way we can know whether
+ * an error occurred. blk_unref() doesn't tell us about failures.
+ */
+ ret = bdrv_inactivate_all();
+ if (ret < 0 && !local_err) {
+ error_setg_errno(&local_err, -ret, "Error while closing the image");
+ }
blk_unref(blk);
if (local_err) {
--
2.37.3

166
SOURCES/kvm-qemu-iotests-Test-qemu-img-bitmap-commit-exit-code-o.patch Normal file
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@ -0,0 +1,166 @@
From 7c6faae20638f58681df223e0ca44e0a6cb60d2d Mon Sep 17 00:00:00 2001
From: Kevin Wolf <kwolf@redhat.com>
Date: Thu, 12 Jan 2023 20:14:54 +0100
Subject: [PATCH 4/4] qemu-iotests: Test qemu-img bitmap/commit exit code on
error
RH-Author: Kevin Wolf <kwolf@redhat.com>
RH-MergeRequest: 251: qemu-img: Fix exit code for errors closing the image
RH-Bugzilla: 2147617
RH-Acked-by: Hanna Czenczek <hreitz@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
RH-Commit: [4/4] fb2f9de98ddd2ee1d745119e4f15272ef44e0aae
This tests that when an error happens while writing back bitmaps to the
image file in qcow2_inactivate(), 'qemu-img bitmap/commit' actually
return an error value in their exit code instead of making the operation
look successful to scripts.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230112191454.169353-5-kwolf@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit 07a4e1f8e5418f36424cd57d5d061b090a238c65)
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
.../qemu-iotests/tests/qemu-img-close-errors | 96 +++++++++++++++++++
.../tests/qemu-img-close-errors.out | 23 +++++
2 files changed, 119 insertions(+)
create mode 100755 tests/qemu-iotests/tests/qemu-img-close-errors
create mode 100644 tests/qemu-iotests/tests/qemu-img-close-errors.out
diff --git a/tests/qemu-iotests/tests/qemu-img-close-errors b/tests/qemu-iotests/tests/qemu-img-close-errors
new file mode 100755
index 0000000000..50bfb6cfa2
--- /dev/null
+++ b/tests/qemu-iotests/tests/qemu-img-close-errors
@@ -0,0 +1,96 @@
+#!/usr/bin/env bash
+# group: rw auto quick
+#
+# Check that errors while closing the image, in particular writing back dirty
+# bitmaps, is correctly reported with a failing qemu-img exit code.
+#
+# Copyright (C) 2023 Red Hat, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+
+# creator
+owner=kwolf@redhat.com
+
+seq="$(basename $0)"
+echo "QA output created by $seq"
+
+status=1 # failure is the default!
+
+_cleanup()
+{
+ _cleanup_test_img
+}
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+cd ..
+. ./common.rc
+. ./common.filter
+
+_supported_fmt qcow2
+_supported_proto file
+_supported_os Linux
+
+size=1G
+
+# The error we are going to use is ENOSPC. Depending on how many bitmaps we
+# create in the backing file (and therefore increase the used up space), we get
+# failures in different places. With a low number, only merging the bitmap
+# fails, whereas with a higher number, already 'qemu-img commit' fails.
+for max_bitmap in 6 7; do
+ echo
+ echo "=== Test with $max_bitmap bitmaps ==="
+
+ TEST_IMG="$TEST_IMG.base" _make_test_img -q $size
+ for i in $(seq 1 $max_bitmap); do
+ $QEMU_IMG bitmap --add "$TEST_IMG.base" "stale-bitmap-$i"
+ done
+
+ # Simulate a block device of 128 MB by resizing the image file accordingly
+ # and then enforcing the size with the raw driver
+ $QEMU_IO -f raw -c "truncate 128M" "$TEST_IMG.base"
+ BASE_JSON='json:{
+ "driver": "qcow2",
+ "file": {
+ "driver": "raw",
+ "size": 134217728,
+ "file": {
+ "driver": "file",
+ "filename":"'"$TEST_IMG.base"'"
+ }
+ }
+ }'
+
+ _make_test_img -q -b "$BASE_JSON" -F $IMGFMT
+ $QEMU_IMG bitmap --add "$TEST_IMG" "good-bitmap"
+
+ $QEMU_IO -c 'write 0 126m' "$TEST_IMG" | _filter_qemu_io
+
+ $QEMU_IMG commit -d "$TEST_IMG" 2>&1 | _filter_generated_node_ids
+ echo "qemu-img commit exit code: ${PIPESTATUS[0]}"
+
+ $QEMU_IMG bitmap --add "$BASE_JSON" "good-bitmap"
+ echo "qemu-img bitmap --add exit code: $?"
+
+ $QEMU_IMG bitmap --merge "good-bitmap" -b "$TEST_IMG" "$BASE_JSON" \
+ "good-bitmap" 2>&1 | _filter_generated_node_ids
+ echo "qemu-img bitmap --merge exit code: ${PIPESTATUS[0]}"
+done
+
+# success, all done
+echo "*** done"
+rm -f $seq.full
+status=0
+
diff --git a/tests/qemu-iotests/tests/qemu-img-close-errors.out b/tests/qemu-iotests/tests/qemu-img-close-errors.out
new file mode 100644
index 0000000000..1bfe88f176
--- /dev/null
+++ b/tests/qemu-iotests/tests/qemu-img-close-errors.out
@@ -0,0 +1,23 @@
+QA output created by qemu-img-close-errors
+
+=== Test with 6 bitmaps ===
+wrote 132120576/132120576 bytes at offset 0
+126 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+Image committed.
+qemu-img commit exit code: 0
+qemu-img bitmap --add exit code: 0
+qemu-img: Lost persistent bitmaps during inactivation of node 'NODE_NAME': Failed to write bitmap 'good-bitmap' to file: No space left on device
+qemu-img: Error while closing the image: Invalid argument
+qemu-img: Lost persistent bitmaps during inactivation of node 'NODE_NAME': Failed to write bitmap 'good-bitmap' to file: No space left on device
+qemu-img bitmap --merge exit code: 1
+
+=== Test with 7 bitmaps ===
+wrote 132120576/132120576 bytes at offset 0
+126 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+qemu-img: Lost persistent bitmaps during inactivation of node 'NODE_NAME': Failed to write bitmap 'stale-bitmap-7' to file: No space left on device
+qemu-img: Lost persistent bitmaps during inactivation of node 'NODE_NAME': Failed to write bitmap 'stale-bitmap-7' to file: No space left on device
+qemu-img: Error while closing the image: Invalid argument
+qemu-img commit exit code: 1
+qemu-img bitmap --add exit code: 0
+qemu-img bitmap --merge exit code: 0
+*** done
--
2.37.3

146
SOURCES/kvm-qemu-thread-posix-cleanup-fix-document-QemuEvent.patch Normal file
View File

@ -0,0 +1,146 @@
From d46ca52c3f42add549bd3790a41d06594821334e Mon Sep 17 00:00:00 2001
From: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Date: Thu, 9 Mar 2023 08:10:57 -0500
Subject: [PATCH 03/13] qemu-thread-posix: cleanup, fix, document QemuEvent
RH-Author: Emanuele Giuseppe Esposito <eesposit@redhat.com>
RH-MergeRequest: 263: qatomic: add smp_mb__before/after_rmw()
RH-Bugzilla: 2168472
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Eric Auger <eric.auger@redhat.com>
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Commit: [3/10] 746070c4d78c7f0a9ac4456d9aee69475acb8964
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2168472
commit 9586a1329f5dce6c1d7f4de53cf0536644d7e593
Author: Paolo Bonzini <pbonzini@redhat.com>
Date: Thu Mar 2 11:19:52 2023 +0100
qemu-thread-posix: cleanup, fix, document QemuEvent
QemuEvent is currently broken on ARM due to missing memory barriers
after qatomic_*(). Apart from adding the memory barrier, a closer look
reveals some unpaired memory barriers too. Document more clearly what
is going on.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
---
util/qemu-thread-posix.c | 69 ++++++++++++++++++++++++++++------------
1 file changed, 49 insertions(+), 20 deletions(-)
diff --git a/util/qemu-thread-posix.c b/util/qemu-thread-posix.c
index e1225b63bd..dd3b6d4670 100644
--- a/util/qemu-thread-posix.c
+++ b/util/qemu-thread-posix.c
@@ -430,13 +430,21 @@ void qemu_event_destroy(QemuEvent *ev)
void qemu_event_set(QemuEvent *ev)
{
- /* qemu_event_set has release semantics, but because it *loads*
+ assert(ev->initialized);
+
+ /*
+ * Pairs with both qemu_event_reset() and qemu_event_wait().
+ *
+ * qemu_event_set has release semantics, but because it *loads*
* ev->value we need a full memory barrier here.
*/
- assert(ev->initialized);
smp_mb();
if (qatomic_read(&ev->value) != EV_SET) {
- if (qatomic_xchg(&ev->value, EV_SET) == EV_BUSY) {
+ int old = qatomic_xchg(&ev->value, EV_SET);
+
+ /* Pairs with memory barrier in kernel futex_wait system call. */
+ smp_mb__after_rmw();
+ if (old == EV_BUSY) {
/* There were waiters, wake them up. */
qemu_futex_wake(ev, INT_MAX);
}
@@ -445,18 +453,19 @@ void qemu_event_set(QemuEvent *ev)
void qemu_event_reset(QemuEvent *ev)
{
- unsigned value;
-
assert(ev->initialized);
- value = qatomic_read(&ev->value);
- smp_mb_acquire();
- if (value == EV_SET) {
- /*
- * If there was a concurrent reset (or even reset+wait),
- * do nothing. Otherwise change EV_SET->EV_FREE.
- */
- qatomic_or(&ev->value, EV_FREE);
- }
+
+ /*
+ * If there was a concurrent reset (or even reset+wait),
+ * do nothing. Otherwise change EV_SET->EV_FREE.
+ */
+ qatomic_or(&ev->value, EV_FREE);
+
+ /*
+ * Order reset before checking the condition in the caller.
+ * Pairs with the first memory barrier in qemu_event_set().
+ */
+ smp_mb__after_rmw();
}
void qemu_event_wait(QemuEvent *ev)
@@ -464,20 +473,40 @@ void qemu_event_wait(QemuEvent *ev)
unsigned value;
assert(ev->initialized);
- value = qatomic_read(&ev->value);
- smp_mb_acquire();
+
+ /*
+ * qemu_event_wait must synchronize with qemu_event_set even if it does
+ * not go down the slow path, so this load-acquire is needed that
+ * synchronizes with the first memory barrier in qemu_event_set().
+ *
+ * If we do go down the slow path, there is no requirement at all: we
+ * might miss a qemu_event_set() here but ultimately the memory barrier in
+ * qemu_futex_wait() will ensure the check is done correctly.
+ */
+ value = qatomic_load_acquire(&ev->value);
if (value != EV_SET) {
if (value == EV_FREE) {
/*
- * Leave the event reset and tell qemu_event_set that there
- * are waiters. No need to retry, because there cannot be
- * a concurrent busy->free transition. After the CAS, the
- * event will be either set or busy.
+ * Leave the event reset and tell qemu_event_set that there are
+ * waiters. No need to retry, because there cannot be a concurrent
+ * busy->free transition. After the CAS, the event will be either
+ * set or busy.
+ *
+ * This cmpxchg doesn't have particular ordering requirements if it
+ * succeeds (moving the store earlier can only cause qemu_event_set()
+ * to issue _more_ wakeups), the failing case needs acquire semantics
+ * like the load above.
*/
if (qatomic_cmpxchg(&ev->value, EV_FREE, EV_BUSY) == EV_SET) {
return;
}
}
+
+ /*
+ * This is the final check for a concurrent set, so it does need
+ * a smp_mb() pairing with the second barrier of qemu_event_set().
+ * The barrier is inside the FUTEX_WAIT system call.
+ */
qemu_futex_wait(ev, EV_BUSY);
}
}
--
2.37.3

162
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@ -0,0 +1,162 @@
From fa730378c42567e77eaf3e70983108f31f9001b9 Mon Sep 17 00:00:00 2001
From: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Date: Thu, 9 Mar 2023 08:11:05 -0500
Subject: [PATCH 04/13] qemu-thread-win32: cleanup, fix, document QemuEvent
RH-Author: Emanuele Giuseppe Esposito <eesposit@redhat.com>
RH-MergeRequest: 263: qatomic: add smp_mb__before/after_rmw()
RH-Bugzilla: 2168472
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Eric Auger <eric.auger@redhat.com>
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Commit: [4/10] 43d5bd903b460d4c3c5793a456820e8c5c8521d9
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2168472
commit 6c5df4b48f0c52a61342ecb307a43f4c2a3565c4
Author: Paolo Bonzini <pbonzini@redhat.com>
Date: Thu Mar 2 11:22:50 2023 +0100
qemu-thread-win32: cleanup, fix, document QemuEvent
QemuEvent is currently broken on ARM due to missing memory barriers
after qatomic_*(). Apart from adding the memory barrier, a closer look
reveals some unpaired memory barriers that are not really needed and
complicated the functions unnecessarily. Also, it is relying on
a memory barrier in ResetEvent(); the barrier _ought_ to be there
but there is really no documentation about it, so make it explicit.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
---
util/qemu-thread-win32.c | 82 +++++++++++++++++++++++++++-------------
1 file changed, 56 insertions(+), 26 deletions(-)
diff --git a/util/qemu-thread-win32.c b/util/qemu-thread-win32.c
index 52eb19f351..c10249bc2e 100644
--- a/util/qemu-thread-win32.c
+++ b/util/qemu-thread-win32.c
@@ -246,12 +246,20 @@ void qemu_event_destroy(QemuEvent *ev)
void qemu_event_set(QemuEvent *ev)
{
assert(ev->initialized);
- /* qemu_event_set has release semantics, but because it *loads*
+
+ /*
+ * Pairs with both qemu_event_reset() and qemu_event_wait().
+ *
+ * qemu_event_set has release semantics, but because it *loads*
* ev->value we need a full memory barrier here.
*/
smp_mb();
if (qatomic_read(&ev->value) != EV_SET) {
- if (qatomic_xchg(&ev->value, EV_SET) == EV_BUSY) {
+ int old = qatomic_xchg(&ev->value, EV_SET);
+
+ /* Pairs with memory barrier after ResetEvent. */
+ smp_mb__after_rmw();
+ if (old == EV_BUSY) {
/* There were waiters, wake them up. */
SetEvent(ev->event);
}
@@ -260,17 +268,19 @@ void qemu_event_set(QemuEvent *ev)
void qemu_event_reset(QemuEvent *ev)
{
- unsigned value;
-
assert(ev->initialized);
- value = qatomic_read(&ev->value);
- smp_mb_acquire();
- if (value == EV_SET) {
- /* If there was a concurrent reset (or even reset+wait),
- * do nothing. Otherwise change EV_SET->EV_FREE.
- */
- qatomic_or(&ev->value, EV_FREE);
- }
+
+ /*
+ * If there was a concurrent reset (or even reset+wait),
+ * do nothing. Otherwise change EV_SET->EV_FREE.
+ */
+ qatomic_or(&ev->value, EV_FREE);
+
+ /*
+ * Order reset before checking the condition in the caller.
+ * Pairs with the first memory barrier in qemu_event_set().
+ */
+ smp_mb__after_rmw();
}
void qemu_event_wait(QemuEvent *ev)
@@ -278,29 +288,49 @@ void qemu_event_wait(QemuEvent *ev)
unsigned value;
assert(ev->initialized);
- value = qatomic_read(&ev->value);
- smp_mb_acquire();
+
+ /*
+ * qemu_event_wait must synchronize with qemu_event_set even if it does
+ * not go down the slow path, so this load-acquire is needed that
+ * synchronizes with the first memory barrier in qemu_event_set().
+ *
+ * If we do go down the slow path, there is no requirement at all: we
+ * might miss a qemu_event_set() here but ultimately the memory barrier in
+ * qemu_futex_wait() will ensure the check is done correctly.
+ */
+ value = qatomic_load_acquire(&ev->value);
if (value != EV_SET) {
if (value == EV_FREE) {
- /* qemu_event_set is not yet going to call SetEvent, but we are
- * going to do another check for EV_SET below when setting EV_BUSY.
- * At that point it is safe to call WaitForSingleObject.
+ /*
+ * Here the underlying kernel event is reset, but qemu_event_set is
+ * not yet going to call SetEvent. However, there will be another
+ * check for EV_SET below when setting EV_BUSY. At that point it
+ * is safe to call WaitForSingleObject.
*/
ResetEvent(ev->event);
- /* Tell qemu_event_set that there are waiters. No need to retry
- * because there cannot be a concurrent busy->free transition.
- * After the CAS, the event will be either set or busy.
+ /*
+ * It is not clear whether ResetEvent provides this barrier; kernel
+ * APIs (KeResetEvent/KeClearEvent) do not. Better safe than sorry!
+ */
+ smp_mb();
+
+ /*
+ * Leave the event reset and tell qemu_event_set that there are
+ * waiters. No need to retry, because there cannot be a concurrent
+ * busy->free transition. After the CAS, the event will be either
+ * set or busy.
*/
if (qatomic_cmpxchg(&ev->value, EV_FREE, EV_BUSY) == EV_SET) {
- value = EV_SET;
- } else {
- value = EV_BUSY;
+ return;
}
}
- if (value == EV_BUSY) {
- WaitForSingleObject(ev->event, INFINITE);
- }
+
+ /*
+ * ev->value is now EV_BUSY. Since we didn't observe EV_SET,
+ * qemu_event_set() must observe EV_BUSY and call SetEvent().
+ */
+ WaitForSingleObject(ev->event, INFINITE);
}
}
--
2.37.3

111
SOURCES/kvm-redhat-Update-linux-headers-linux-kvm.h-to-v5.18-rc6.patch Normal file
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@ -0,0 +1,111 @@
From 21b19213328826327eba18199b790425659af7d8 Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Fri, 29 Jul 2022 16:55:34 +0200
Subject: [PATCH 1/3] redhat: Update linux-headers/linux/kvm.h to v5.18-rc6
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <None>
RH-MergeRequest: 220: s390x: Fix skey test in kvm_unit_test
RH-Bugzilla: 2124757
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Commit: [1/2] e514a00305cb0caab9d3acc0efb325853daa6d51
Upstream Status: RHEL-only
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2124757
Based on upstream commit e4082063e47e9731dbeb1c26174c17f6038f577f
("linux-headers: Update to v5.18-rc6"), but this is focusing on
the file linux-headers/linux/kvm.h only (since the other changes
related to the VFIO renaming might break some stuff).
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit 71516db15469a02600932a5c1f0d4a9626a91193)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
linux-headers/linux/kvm.h | 27 +++++++++++++++++++++------
1 file changed, 21 insertions(+), 6 deletions(-)
diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h
index d232feaae9..0d05d02ee4 100644
--- a/linux-headers/linux/kvm.h
+++ b/linux-headers/linux/kvm.h
@@ -445,7 +445,11 @@ struct kvm_run {
#define KVM_SYSTEM_EVENT_RESET 2
#define KVM_SYSTEM_EVENT_CRASH 3
__u32 type;
- __u64 flags;
+ __u32 ndata;
+ union {
+ __u64 flags;
+ __u64 data[16];
+ };
} system_event;
/* KVM_EXIT_S390_STSI */
struct {
@@ -562,9 +566,12 @@ struct kvm_s390_mem_op {
__u32 op; /* type of operation */
__u64 buf; /* buffer in userspace */
union {
- __u8 ar; /* the access register number */
+ struct {
+ __u8 ar; /* the access register number */
+ __u8 key; /* access key, ignored if flag unset */
+ };
__u32 sida_offset; /* offset into the sida */
- __u8 reserved[32]; /* should be set to 0 */
+ __u8 reserved[32]; /* ignored */
};
};
/* types for kvm_s390_mem_op->op */
@@ -572,9 +579,12 @@ struct kvm_s390_mem_op {
#define KVM_S390_MEMOP_LOGICAL_WRITE 1
#define KVM_S390_MEMOP_SIDA_READ 2
#define KVM_S390_MEMOP_SIDA_WRITE 3
+#define KVM_S390_MEMOP_ABSOLUTE_READ 4
+#define KVM_S390_MEMOP_ABSOLUTE_WRITE 5
/* flags for kvm_s390_mem_op->flags */
#define KVM_S390_MEMOP_F_CHECK_ONLY (1ULL << 0)
#define KVM_S390_MEMOP_F_INJECT_EXCEPTION (1ULL << 1)
+#define KVM_S390_MEMOP_F_SKEY_PROTECTION (1ULL << 2)
/* for KVM_INTERRUPT */
struct kvm_interrupt {
@@ -1134,6 +1144,12 @@ struct kvm_ppc_resize_hpt {
#define KVM_CAP_VM_GPA_BITS 207
#define KVM_CAP_XSAVE2 208
#define KVM_CAP_SYS_ATTRIBUTES 209
+#define KVM_CAP_PPC_AIL_MODE_3 210
+#define KVM_CAP_S390_MEM_OP_EXTENSION 211
+#define KVM_CAP_PMU_CAPABILITY 212
+#define KVM_CAP_DISABLE_QUIRKS2 213
+/* #define KVM_CAP_VM_TSC_CONTROL 214 */
+#define KVM_CAP_SYSTEM_EVENT_DATA 215
#ifdef KVM_CAP_IRQ_ROUTING
@@ -1624,9 +1640,6 @@ struct kvm_enc_region {
#define KVM_S390_NORMAL_RESET _IO(KVMIO, 0xc3)
#define KVM_S390_CLEAR_RESET _IO(KVMIO, 0xc4)
-/* Available with KVM_CAP_XSAVE2 */
-#define KVM_GET_XSAVE2 _IOR(KVMIO, 0xcf, struct kvm_xsave)
-
struct kvm_s390_pv_sec_parm {
__u64 origin;
__u64 length;
@@ -1973,6 +1986,8 @@ struct kvm_dirty_gfn {
#define KVM_BUS_LOCK_DETECTION_OFF (1 << 0)
#define KVM_BUS_LOCK_DETECTION_EXIT (1 << 1)
+#define KVM_PMU_CAP_DISABLE (1 << 0)
+
/**
* struct kvm_stats_header - Header of per vm/vcpu binary statistics data.
* @flags: Some extra information for header, always 0 for now.
--
2.35.3

124
SOURCES/kvm-s390x-Add-KVM-PV-dump-interface.patch Normal file
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@ -0,0 +1,124 @@
From 95c229506a6e7261fce184488e880a94f9ba0789 Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Mon, 17 Oct 2022 08:38:21 +0000
Subject: [PATCH 40/42] s390x: Add KVM PV dump interface
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [40/41] 5df512a63b2ed17991489565b70f89f4efc0b639
Let's add a few bits of code which hide the new KVM PV dump API from
us via new functions.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
[ Marc-André: fix up for compilation issue ]
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20221017083822.43118-10-frankja@linux.ibm.com>
(cherry picked from commit 753ca06f4706cd6e57750a606afb08c5c5299643)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
hw/s390x/pv.c | 51 +++++++++++++++++++++++++++++++++++++++++++
include/hw/s390x/pv.h | 9 ++++++++
2 files changed, 60 insertions(+)
diff --git a/hw/s390x/pv.c b/hw/s390x/pv.c
index 4c012f2eeb..728ba24547 100644
--- a/hw/s390x/pv.c
+++ b/hw/s390x/pv.c
@@ -175,6 +175,57 @@ bool kvm_s390_pv_info_basic_valid(void)
return info_valid;
}
+static int s390_pv_dump_cmd(uint64_t subcmd, uint64_t uaddr, uint64_t gaddr,
+ uint64_t len)
+{
+ struct kvm_s390_pv_dmp dmp = {
+ .subcmd = subcmd,
+ .buff_addr = uaddr,
+ .buff_len = len,
+ .gaddr = gaddr,
+ };
+ int ret;
+
+ ret = s390_pv_cmd(KVM_PV_DUMP, (void *)&dmp);
+ if (ret) {
+ error_report("KVM DUMP command %ld failed", subcmd);
+ }
+ return ret;
+}
+
+int kvm_s390_dump_cpu(S390CPU *cpu, void *buff)
+{
+ struct kvm_s390_pv_dmp dmp = {
+ .subcmd = KVM_PV_DUMP_CPU,
+ .buff_addr = (uint64_t)buff,
+ .gaddr = 0,
+ .buff_len = info_dump.dump_cpu_buffer_len,
+ };
+ struct kvm_pv_cmd pv = {
+ .cmd = KVM_PV_DUMP,
+ .data = (uint64_t)&dmp,
+ };
+
+ return kvm_vcpu_ioctl(CPU(cpu), KVM_S390_PV_CPU_COMMAND, &pv);
+}
+
+int kvm_s390_dump_init(void)
+{
+ return s390_pv_dump_cmd(KVM_PV_DUMP_INIT, 0, 0, 0);
+}
+
+int kvm_s390_dump_mem_state(uint64_t gaddr, size_t len, void *dest)
+{
+ return s390_pv_dump_cmd(KVM_PV_DUMP_CONFIG_STOR_STATE, (uint64_t)dest,
+ gaddr, len);
+}
+
+int kvm_s390_dump_completion_data(void *buff)
+{
+ return s390_pv_dump_cmd(KVM_PV_DUMP_COMPLETE, (uint64_t)buff, 0,
+ info_dump.dump_config_finalize_len);
+}
+
#define TYPE_S390_PV_GUEST "s390-pv-guest"
OBJECT_DECLARE_SIMPLE_TYPE(S390PVGuest, S390_PV_GUEST)
diff --git a/include/hw/s390x/pv.h b/include/hw/s390x/pv.h
index e5ea0eca16..9360aa1091 100644
--- a/include/hw/s390x/pv.h
+++ b/include/hw/s390x/pv.h
@@ -51,6 +51,10 @@ uint64_t kvm_s390_pv_dmp_get_size_cpu(void);
uint64_t kvm_s390_pv_dmp_get_size_mem_state(void);
uint64_t kvm_s390_pv_dmp_get_size_completion_data(void);
bool kvm_s390_pv_info_basic_valid(void);
+int kvm_s390_dump_init(void);
+int kvm_s390_dump_cpu(S390CPU *cpu, void *buff);
+int kvm_s390_dump_mem_state(uint64_t addr, size_t len, void *dest);
+int kvm_s390_dump_completion_data(void *buff);
#else /* CONFIG_KVM */
static inline bool s390_is_pv(void) { return false; }
static inline int s390_pv_query_info(void) { return 0; }
@@ -66,6 +70,11 @@ static inline uint64_t kvm_s390_pv_dmp_get_size_cpu(void) { return 0; }
static inline uint64_t kvm_s390_pv_dmp_get_size_mem_state(void) { return 0; }
static inline uint64_t kvm_s390_pv_dmp_get_size_completion_data(void) { return 0; }
static inline bool kvm_s390_pv_info_basic_valid(void) { return false; }
+static inline int kvm_s390_dump_init(void) { return 0; }
+static inline int kvm_s390_dump_cpu(S390CPU *cpu, void *buff) { return 0; }
+static inline int kvm_s390_dump_mem_state(uint64_t addr, size_t len,
+ void *dest) { return 0; }
+static inline int kvm_s390_dump_completion_data(void *buff) { return 0; }
#endif /* CONFIG_KVM */
int s390_pv_kvm_init(ConfidentialGuestSupport *cgs, Error **errp);
--
2.37.3

113
SOURCES/kvm-s390x-Add-protected-dump-cap.patch Normal file
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@ -0,0 +1,113 @@
From 7634eed5aea61dc94f9a828c62ef3da9aeaa62ae Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Mon, 17 Oct 2022 08:38:18 +0000
Subject: [PATCH 37/42] s390x: Add protected dump cap
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [37/41] 52e1e7bf1a00ce3a220d3db2f733a65548bfec6d
Add a protected dump capability for later feature checking.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Message-Id: <20221017083822.43118-7-frankja@linux.ibm.com>
[ Marc-André - Add missing stubs when !kvm ]
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
(cherry picked from commit ad3b2e693daac6ed92db7361236028851d37c77c)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
target/s390x/kvm/kvm.c | 7 +++++++
target/s390x/kvm/kvm_s390x.h | 1 +
target/s390x/kvm/meson.build | 2 ++
target/s390x/kvm/stubs.c | 12 ++++++++++++
4 files changed, 22 insertions(+)
create mode 100644 target/s390x/kvm/stubs.c
diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c
index 30712487d4..d36b44f32a 100644
--- a/target/s390x/kvm/kvm.c
+++ b/target/s390x/kvm/kvm.c
@@ -159,6 +159,7 @@ static int cap_hpage_1m;
static int cap_vcpu_resets;
static int cap_protected;
static int cap_zpci_op;
+static int cap_protected_dump;
static bool mem_op_storage_key_support;
@@ -365,6 +366,7 @@ int kvm_arch_init(MachineState *ms, KVMState *s)
cap_vcpu_resets = kvm_check_extension(s, KVM_CAP_S390_VCPU_RESETS);
cap_protected = kvm_check_extension(s, KVM_CAP_S390_PROTECTED);
cap_zpci_op = kvm_check_extension(s, KVM_CAP_S390_ZPCI_OP);
+ cap_protected_dump = kvm_check_extension(s, KVM_CAP_S390_PROTECTED_DUMP);
kvm_vm_enable_cap(s, KVM_CAP_S390_USER_SIGP, 0);
kvm_vm_enable_cap(s, KVM_CAP_S390_VECTOR_REGISTERS, 0);
@@ -2042,6 +2044,11 @@ int kvm_s390_assign_subch_ioeventfd(EventNotifier *notifier, uint32_t sch,
return kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick);
}
+int kvm_s390_get_protected_dump(void)
+{
+ return cap_protected_dump;
+}
+
int kvm_s390_get_ri(void)
{
return cap_ri;
diff --git a/target/s390x/kvm/kvm_s390x.h b/target/s390x/kvm/kvm_s390x.h
index aaae8570de..f9785564d0 100644
--- a/target/s390x/kvm/kvm_s390x.h
+++ b/target/s390x/kvm/kvm_s390x.h
@@ -26,6 +26,7 @@ int kvm_s390_set_cpu_state(S390CPU *cpu, uint8_t cpu_state);
void kvm_s390_vcpu_interrupt_pre_save(S390CPU *cpu);
int kvm_s390_vcpu_interrupt_post_load(S390CPU *cpu);
int kvm_s390_get_hpage_1m(void);
+int kvm_s390_get_protected_dump(void);
int kvm_s390_get_ri(void);
int kvm_s390_get_zpci_op(void);
int kvm_s390_get_clock(uint8_t *tod_high, uint64_t *tod_clock);
diff --git a/target/s390x/kvm/meson.build b/target/s390x/kvm/meson.build
index d1356356b1..aef52b6686 100644
--- a/target/s390x/kvm/meson.build
+++ b/target/s390x/kvm/meson.build
@@ -1,6 +1,8 @@
s390x_ss.add(when: 'CONFIG_KVM', if_true: files(
'kvm.c'
+), if_false: files(
+ 'stubs.c'
))
# Newer kernels on s390 check for an S390_PGSTE program header and
diff --git a/target/s390x/kvm/stubs.c b/target/s390x/kvm/stubs.c
new file mode 100644
index 0000000000..5fd63b9a7e
--- /dev/null
+++ b/target/s390x/kvm/stubs.c
@@ -0,0 +1,12 @@
+/*
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+
+#include "kvm_s390x.h"
+
+int kvm_s390_get_protected_dump(void)
+{
+ return false;
+}
--
2.37.3

174
SOURCES/kvm-s390x-Introduce-PV-query-interface.patch Normal file
View File

@ -0,0 +1,174 @@
From 760236b3633a8f532631256a899cab969e772196 Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Mon, 17 Oct 2022 08:38:19 +0000
Subject: [PATCH 38/42] s390x: Introduce PV query interface
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [38/41] 3090615d81ec6b9e4c306f7fc3709e1935ff5a79
Introduce an interface over which we can get information about UV data.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
Reviewed-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Acked-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20221017083822.43118-8-frankja@linux.ibm.com>
(cherry picked from commit 03d83ecfae46bf5e0074cb5808043b30df34064b)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
hw/s390x/pv.c | 61 ++++++++++++++++++++++++++++++++++++++
hw/s390x/s390-virtio-ccw.c | 6 ++++
include/hw/s390x/pv.h | 10 +++++++
3 files changed, 77 insertions(+)
diff --git a/hw/s390x/pv.c b/hw/s390x/pv.c
index 401b63d6cb..4c012f2eeb 100644
--- a/hw/s390x/pv.c
+++ b/hw/s390x/pv.c
@@ -20,6 +20,11 @@
#include "exec/confidential-guest-support.h"
#include "hw/s390x/ipl.h"
#include "hw/s390x/pv.h"
+#include "target/s390x/kvm/kvm_s390x.h"
+
+static bool info_valid;
+static struct kvm_s390_pv_info_vm info_vm;
+static struct kvm_s390_pv_info_dump info_dump;
static int __s390_pv_cmd(uint32_t cmd, const char *cmdname, void *data)
{
@@ -56,6 +61,42 @@ static int __s390_pv_cmd(uint32_t cmd, const char *cmdname, void *data)
} \
}
+int s390_pv_query_info(void)
+{
+ struct kvm_s390_pv_info info = {
+ .header.id = KVM_PV_INFO_VM,
+ .header.len_max = sizeof(info.header) + sizeof(info.vm),
+ };
+ int rc;
+
+ /* Info API's first user is dump so they are bundled */
+ if (!kvm_s390_get_protected_dump()) {
+ return 0;
+ }
+
+ rc = s390_pv_cmd(KVM_PV_INFO, &info);
+ if (rc) {
+ error_report("KVM PV INFO cmd %x failed: %s",
+ info.header.id, strerror(-rc));
+ return rc;
+ }
+ memcpy(&info_vm, &info.vm, sizeof(info.vm));
+
+ info.header.id = KVM_PV_INFO_DUMP;
+ info.header.len_max = sizeof(info.header) + sizeof(info.dump);
+ rc = s390_pv_cmd(KVM_PV_INFO, &info);
+ if (rc) {
+ error_report("KVM PV INFO cmd %x failed: %s",
+ info.header.id, strerror(-rc));
+ return rc;
+ }
+
+ memcpy(&info_dump, &info.dump, sizeof(info.dump));
+ info_valid = true;
+
+ return rc;
+}
+
int s390_pv_vm_enable(void)
{
return s390_pv_cmd(KVM_PV_ENABLE, NULL);
@@ -114,6 +155,26 @@ void s390_pv_inject_reset_error(CPUState *cs)
env->regs[r1 + 1] = DIAG_308_RC_INVAL_FOR_PV;
}
+uint64_t kvm_s390_pv_dmp_get_size_cpu(void)
+{
+ return info_dump.dump_cpu_buffer_len;
+}
+
+uint64_t kvm_s390_pv_dmp_get_size_completion_data(void)
+{
+ return info_dump.dump_config_finalize_len;
+}
+
+uint64_t kvm_s390_pv_dmp_get_size_mem_state(void)
+{
+ return info_dump.dump_config_mem_buffer_per_1m;
+}
+
+bool kvm_s390_pv_info_basic_valid(void)
+{
+ return info_valid;
+}
+
#define TYPE_S390_PV_GUEST "s390-pv-guest"
OBJECT_DECLARE_SIMPLE_TYPE(S390PVGuest, S390_PV_GUEST)
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index bd80e72cf8..a9617ab79f 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -365,6 +365,12 @@ static int s390_machine_protect(S390CcwMachineState *ms)
ms->pv = true;
+ /* Will return 0 if API is not available since it's not vital */
+ rc = s390_pv_query_info();
+ if (rc) {
+ goto out_err;
+ }
+
/* Set SE header and unpack */
rc = s390_ipl_prepare_pv_header();
if (rc) {
diff --git a/include/hw/s390x/pv.h b/include/hw/s390x/pv.h
index 1f1f545bfc..e5ea0eca16 100644
--- a/include/hw/s390x/pv.h
+++ b/include/hw/s390x/pv.h
@@ -38,6 +38,7 @@ static inline bool s390_is_pv(void)
return ccw->pv;
}
+int s390_pv_query_info(void);
int s390_pv_vm_enable(void);
void s390_pv_vm_disable(void);
int s390_pv_set_sec_parms(uint64_t origin, uint64_t length);
@@ -46,8 +47,13 @@ void s390_pv_prep_reset(void);
int s390_pv_verify(void);
void s390_pv_unshare(void);
void s390_pv_inject_reset_error(CPUState *cs);
+uint64_t kvm_s390_pv_dmp_get_size_cpu(void);
+uint64_t kvm_s390_pv_dmp_get_size_mem_state(void);
+uint64_t kvm_s390_pv_dmp_get_size_completion_data(void);
+bool kvm_s390_pv_info_basic_valid(void);
#else /* CONFIG_KVM */
static inline bool s390_is_pv(void) { return false; }
+static inline int s390_pv_query_info(void) { return 0; }
static inline int s390_pv_vm_enable(void) { return 0; }
static inline void s390_pv_vm_disable(void) {}
static inline int s390_pv_set_sec_parms(uint64_t origin, uint64_t length) { return 0; }
@@ -56,6 +62,10 @@ static inline void s390_pv_prep_reset(void) {}
static inline int s390_pv_verify(void) { return 0; }
static inline void s390_pv_unshare(void) {}
static inline void s390_pv_inject_reset_error(CPUState *cs) {};
+static inline uint64_t kvm_s390_pv_dmp_get_size_cpu(void) { return 0; }
+static inline uint64_t kvm_s390_pv_dmp_get_size_mem_state(void) { return 0; }
+static inline uint64_t kvm_s390_pv_dmp_get_size_completion_data(void) { return 0; }
+static inline bool kvm_s390_pv_info_basic_valid(void) { return false; }
#endif /* CONFIG_KVM */
int s390_pv_kvm_init(ConfidentialGuestSupport *cgs, Error **errp);
--
2.37.3

209
SOURCES/kvm-s390x-Register-TYPE_S390_CCW_MACHINE-properties-as-c.patch Normal file
View File

@ -0,0 +1,209 @@
From 429c4cc750affe82b89867668ff2515a8a66732e Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Fri, 18 Nov 2022 15:23:19 +0100
Subject: [PATCH 2/3] s390x: Register TYPE_S390_CCW_MACHINE properties as class
properties
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Thomas Huth <thuth@redhat.com>
RH-MergeRequest: 233: s390x: Document the "loadparm" machine property
RH-Bugzilla: 2128225
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Cédric Le Goater <clg@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [2/2] 28a0086cb0e8be2535deafdd9115cadd7ff033f3
Currently, when running 'qemu-system-s390x -M s390-ccw-virtio,help'
the s390x-specific properties are not listed anymore. This happens
because since commit d8fb7d0969 ("vl: switch -M parsing to keyval")
the properties have to be defined at the class level and not at the
instance level anymore. Fix it on s390x now, too, by moving the
registration of the properties to the class level"
Fixes: d8fb7d0969 ("vl: switch -M parsing to keyval")
Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Message-Id: <20221103170150.20789-2-pmorel@linux.ibm.com>
[thuth: Add patch description]
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit 1fd396e32288bbf536483c74b68cb3ee86005a9f)
Conflicts:
hw/s390x/s390-virtio-ccw.c
(dropped the "zpcii-disable" property code - it's not used in downstream)
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
hw/s390x/s390-virtio-ccw.c | 117 +++++++++++++++++++++----------------
1 file changed, 67 insertions(+), 50 deletions(-)
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index a9617ab79f..4a7cd21cac 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -42,6 +42,7 @@
#include "sysemu/sysemu.h"
#include "hw/s390x/pv.h"
#include "migration/blocker.h"
+#include "qapi/visitor.h"
static Error *pv_mig_blocker;
@@ -588,38 +589,6 @@ static ram_addr_t s390_fixup_ram_size(ram_addr_t sz)
return newsz;
}
-static void ccw_machine_class_init(ObjectClass *oc, void *data)
-{
- MachineClass *mc = MACHINE_CLASS(oc);
- NMIClass *nc = NMI_CLASS(oc);
- HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
- S390CcwMachineClass *s390mc = S390_CCW_MACHINE_CLASS(mc);
-
- s390mc->ri_allowed = true;
- s390mc->cpu_model_allowed = true;
- s390mc->css_migration_enabled = true;
- s390mc->hpage_1m_allowed = true;
- mc->init = ccw_init;
- mc->reset = s390_machine_reset;
- mc->block_default_type = IF_VIRTIO;
- mc->no_cdrom = 1;
- mc->no_floppy = 1;
- mc->no_parallel = 1;
- mc->no_sdcard = 1;
- mc->max_cpus = S390_MAX_CPUS;
- mc->has_hotpluggable_cpus = true;
- assert(!mc->get_hotplug_handler);
- mc->get_hotplug_handler = s390_get_hotplug_handler;
- mc->cpu_index_to_instance_props = s390_cpu_index_to_props;
- mc->possible_cpu_arch_ids = s390_possible_cpu_arch_ids;
- /* it is overridden with 'host' cpu *in kvm_arch_init* */
- mc->default_cpu_type = S390_CPU_TYPE_NAME("qemu");
- hc->plug = s390_machine_device_plug;
- hc->unplug_request = s390_machine_device_unplug_request;
- nc->nmi_monitor_handler = s390_nmi;
- mc->default_ram_id = "s390.ram";
-}
-
static inline bool machine_get_aes_key_wrap(Object *obj, Error **errp)
{
S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
@@ -694,19 +663,29 @@ bool hpage_1m_allowed(void)
return get_machine_class()->hpage_1m_allowed;
}
-static char *machine_get_loadparm(Object *obj, Error **errp)
+static void machine_get_loadparm(Object *obj, Visitor *v,
+ const char *name, void *opaque,
+ Error **errp)
{
S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
+ char *str = g_strndup((char *) ms->loadparm, sizeof(ms->loadparm));
- /* make a NUL-terminated string */
- return g_strndup((char *) ms->loadparm, sizeof(ms->loadparm));
+ visit_type_str(v, name, &str, errp);
+ g_free(str);
}
-static void machine_set_loadparm(Object *obj, const char *val, Error **errp)
+static void machine_set_loadparm(Object *obj, Visitor *v,
+ const char *name, void *opaque,
+ Error **errp)
{
S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
+ char *val;
int i;
+ if (!visit_type_str(v, name, &val, errp)) {
+ return;
+ }
+
for (i = 0; i < sizeof(ms->loadparm) && val[i]; i++) {
uint8_t c = qemu_toupper(val[i]); /* mimic HMC */
@@ -724,29 +703,67 @@ static void machine_set_loadparm(Object *obj, const char *val, Error **errp)
ms->loadparm[i] = ' '; /* pad right with spaces */
}
}
-static inline void s390_machine_initfn(Object *obj)
+
+static void ccw_machine_class_init(ObjectClass *oc, void *data)
{
- object_property_add_bool(obj, "aes-key-wrap",
- machine_get_aes_key_wrap,
- machine_set_aes_key_wrap);
- object_property_set_description(obj, "aes-key-wrap",
+ MachineClass *mc = MACHINE_CLASS(oc);
+ NMIClass *nc = NMI_CLASS(oc);
+ HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
+ S390CcwMachineClass *s390mc = S390_CCW_MACHINE_CLASS(mc);
+
+ s390mc->ri_allowed = true;
+ s390mc->cpu_model_allowed = true;
+ s390mc->css_migration_enabled = true;
+ s390mc->hpage_1m_allowed = true;
+ mc->init = ccw_init;
+ mc->reset = s390_machine_reset;
+ mc->block_default_type = IF_VIRTIO;
+ mc->no_cdrom = 1;
+ mc->no_floppy = 1;
+ mc->no_parallel = 1;
+ mc->no_sdcard = 1;
+ mc->max_cpus = S390_MAX_CPUS;
+ mc->has_hotpluggable_cpus = true;
+ assert(!mc->get_hotplug_handler);
+ mc->get_hotplug_handler = s390_get_hotplug_handler;
+ mc->cpu_index_to_instance_props = s390_cpu_index_to_props;
+ mc->possible_cpu_arch_ids = s390_possible_cpu_arch_ids;
+ /* it is overridden with 'host' cpu *in kvm_arch_init* */
+ mc->default_cpu_type = S390_CPU_TYPE_NAME("qemu");
+ hc->plug = s390_machine_device_plug;
+ hc->unplug_request = s390_machine_device_unplug_request;
+ nc->nmi_monitor_handler = s390_nmi;
+ mc->default_ram_id = "s390.ram";
+
+ object_class_property_add_bool(oc, "aes-key-wrap",
+ machine_get_aes_key_wrap,
+ machine_set_aes_key_wrap);
+ object_class_property_set_description(oc, "aes-key-wrap",
"enable/disable AES key wrapping using the CPACF wrapping key");
- object_property_set_bool(obj, "aes-key-wrap", true, NULL);
- object_property_add_bool(obj, "dea-key-wrap",
- machine_get_dea_key_wrap,
- machine_set_dea_key_wrap);
- object_property_set_description(obj, "dea-key-wrap",
+ object_class_property_add_bool(oc, "dea-key-wrap",
+ machine_get_dea_key_wrap,
+ machine_set_dea_key_wrap);
+ object_class_property_set_description(oc, "dea-key-wrap",
"enable/disable DEA key wrapping using the CPACF wrapping key");
- object_property_set_bool(obj, "dea-key-wrap", true, NULL);
- object_property_add_str(obj, "loadparm",
- machine_get_loadparm, machine_set_loadparm);
- object_property_set_description(obj, "loadparm",
+
+ object_class_property_add(oc, "loadparm", "loadparm",
+ machine_get_loadparm, machine_set_loadparm,
+ NULL, NULL);
+ object_class_property_set_description(oc, "loadparm",
"Up to 8 chars in set of [A-Za-z0-9. ] (lower case chars converted"
" to upper case) to pass to machine loader, boot manager,"
" and guest kernel");
}
+static inline void s390_machine_initfn(Object *obj)
+{
+ S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
+
+ ms->aes_key_wrap = true;
+ ms->dea_key_wrap = true;
+}
+
static const TypeInfo ccw_machine_info = {
.name = TYPE_S390_CCW_MACHINE,
.parent = TYPE_MACHINE,
--
2.37.3

114
SOURCES/kvm-s390x-pci-RPCIT-second-pass-when-mappings-exhausted.patch Normal file
View File

@ -0,0 +1,114 @@
From 2f0febd6813c4ad7f52e43afb3ecce7aef3557e6 Mon Sep 17 00:00:00 2001
From: Matthew Rosato <mjrosato@linux.ibm.com>
Date: Fri, 28 Oct 2022 15:47:56 -0400
Subject: [PATCH 08/11] s390x/pci: RPCIT second pass when mappings exhausted
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 250: s390x/pci: reset ISM passthrough devices on shutdown and system reset
RH-Bugzilla: 2163713
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [1/4] 0b4500b9247725b1ef0b290bb85392300a618cac
If we encounter a new mapping while the number of available DMA entries
in vfio is 0, we are currently skipping that mapping which is a problem
if we manage to free up DMA space after that within the same RPCIT --
we will return to the guest with CC0 and have not mapped everything
within the specified range. This issue was uncovered while testing
changes to the s390 linux kernel iommu/dma code, where a different
usage pattern was employed (new mappings start at the end of the
aperture and work back towards the front, making us far more likely
to encounter new mappings before invalidated mappings during a
global refresh).
Fix this by tracking whether any mappings were skipped due to vfio
DMA limit hitting 0; when this occurs, we still continue the range
and unmap/map anything we can - then we must re-run the range again
to pickup anything that was missed. This must occur in a loop until
all requests are satisfied (success) or we detect that we are still
unable to complete all mappings (return ZPCI_RPCIT_ST_INSUFF_RES).
Link: https://lore.kernel.org/linux-s390/20221019144435.369902-1-schnelle@linux.ibm.com/
Fixes: 37fa32de70 ("s390x/pci: Honor DMA limits set by vfio")
Reported-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Message-Id: <20221028194758.204007-2-mjrosato@linux.ibm.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit 4a8d21ba50fc8625c3bd51dab903872952f95718)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
hw/s390x/s390-pci-inst.c | 29 ++++++++++++++++++++++-------
1 file changed, 22 insertions(+), 7 deletions(-)
diff --git a/hw/s390x/s390-pci-inst.c b/hw/s390x/s390-pci-inst.c
index 20a9bcc7af..7cc4bcf850 100644
--- a/hw/s390x/s390-pci-inst.c
+++ b/hw/s390x/s390-pci-inst.c
@@ -677,8 +677,9 @@ int rpcit_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2, uintptr_t ra)
S390PCIBusDevice *pbdev;
S390PCIIOMMU *iommu;
S390IOTLBEntry entry;
- hwaddr start, end;
+ hwaddr start, end, sstart;
uint32_t dma_avail;
+ bool again;
if (env->psw.mask & PSW_MASK_PSTATE) {
s390_program_interrupt(env, PGM_PRIVILEGED, ra);
@@ -691,7 +692,7 @@ int rpcit_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2, uintptr_t ra)
}
fh = env->regs[r1] >> 32;
- start = env->regs[r2];
+ sstart = start = env->regs[r2];
end = start + env->regs[r2 + 1];
pbdev = s390_pci_find_dev_by_fh(s390_get_phb(), fh);
@@ -732,6 +733,9 @@ int rpcit_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2, uintptr_t ra)
goto err;
}
+ retry:
+ start = sstart;
+ again = false;
while (start < end) {
error = s390_guest_io_table_walk(iommu->g_iota, start, &entry);
if (error) {
@@ -739,13 +743,24 @@ int rpcit_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2, uintptr_t ra)
}
start += entry.len;
- while (entry.iova < start && entry.iova < end &&
- (dma_avail > 0 || entry.perm == IOMMU_NONE)) {
- dma_avail = s390_pci_update_iotlb(iommu, &entry);
- entry.iova += TARGET_PAGE_SIZE;
- entry.translated_addr += TARGET_PAGE_SIZE;
+ while (entry.iova < start && entry.iova < end) {
+ if (dma_avail > 0 || entry.perm == IOMMU_NONE) {
+ dma_avail = s390_pci_update_iotlb(iommu, &entry);
+ entry.iova += TARGET_PAGE_SIZE;
+ entry.translated_addr += TARGET_PAGE_SIZE;
+ } else {
+ /*
+ * We are unable to make a new mapping at this time, continue
+ * on and hopefully free up more space. Then attempt another
+ * pass.
+ */
+ again = true;
+ break;
+ }
}
}
+ if (again && dma_avail > 0)
+ goto retry;
err:
if (error) {
pbdev->state = ZPCI_FS_ERROR;
--
2.37.3

178
SOURCES/kvm-s390x-pci-add-routine-to-get-host-function-handle-fr.patch Normal file
View File

@ -0,0 +1,178 @@
From 8020177f1c40da2a9ca09fa20dc90eda65739671 Mon Sep 17 00:00:00 2001
From: Matthew Rosato <mjrosato@linux.ibm.com>
Date: Fri, 2 Sep 2022 13:27:31 -0400
Subject: [PATCH 06/42] s390x/pci: add routine to get host function handle from
CLP info
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [6/41] 8ab652cf4095e61f5f55726d41111de227d452e7
In order to interface with the underlying host zPCI device, we need
to know its function handle. Add a routine to grab this from the
vfio CLP capabilities chain.
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Message-Id: <20220902172737.170349-3-mjrosato@linux.ibm.com>
[thuth: Replace free(info) with g_free(info)]
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit 21fa15298d88db2050a713cdf79c10cb0e09146f)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
hw/s390x/s390-pci-vfio.c | 83 ++++++++++++++++++++++++++------
include/hw/s390x/s390-pci-vfio.h | 5 ++
2 files changed, 72 insertions(+), 16 deletions(-)
diff --git a/hw/s390x/s390-pci-vfio.c b/hw/s390x/s390-pci-vfio.c
index 6f80a47e29..08bcc55e85 100644
--- a/hw/s390x/s390-pci-vfio.c
+++ b/hw/s390x/s390-pci-vfio.c
@@ -124,6 +124,27 @@ static void s390_pci_read_base(S390PCIBusDevice *pbdev,
pbdev->zpci_fn.pft = 0;
}
+static bool get_host_fh(S390PCIBusDevice *pbdev, struct vfio_device_info *info,
+ uint32_t *fh)
+{
+ struct vfio_info_cap_header *hdr;
+ struct vfio_device_info_cap_zpci_base *cap;
+ VFIOPCIDevice *vpci = container_of(pbdev->pdev, VFIOPCIDevice, pdev);
+
+ hdr = vfio_get_device_info_cap(info, VFIO_DEVICE_INFO_CAP_ZPCI_BASE);
+
+ /* Can only get the host fh with version 2 or greater */
+ if (hdr == NULL || hdr->version < 2) {
+ trace_s390_pci_clp_cap(vpci->vbasedev.name,
+ VFIO_DEVICE_INFO_CAP_ZPCI_BASE);
+ return false;
+ }
+ cap = (void *) hdr;
+
+ *fh = cap->fh;
+ return true;
+}
+
static void s390_pci_read_group(S390PCIBusDevice *pbdev,
struct vfio_device_info *info)
{
@@ -217,25 +238,13 @@ static void s390_pci_read_pfip(S390PCIBusDevice *pbdev,
memcpy(pbdev->zpci_fn.pfip, cap->pfip, CLP_PFIP_NR_SEGMENTS);
}
-/*
- * This function will issue the VFIO_DEVICE_GET_INFO ioctl and look for
- * capabilities that contain information about CLP features provided by the
- * underlying host.
- * On entry, defaults have already been placed into the guest CLP response
- * buffers. On exit, defaults will have been overwritten for any CLP features
- * found in the capability chain; defaults will remain for any CLP features not
- * found in the chain.
- */
-void s390_pci_get_clp_info(S390PCIBusDevice *pbdev)
+static struct vfio_device_info *get_device_info(S390PCIBusDevice *pbdev,
+ uint32_t argsz)
{
- g_autofree struct vfio_device_info *info = NULL;
+ struct vfio_device_info *info = g_malloc0(argsz);
VFIOPCIDevice *vfio_pci;
- uint32_t argsz;
int fd;
- argsz = sizeof(*info);
- info = g_malloc0(argsz);
-
vfio_pci = container_of(pbdev->pdev, VFIOPCIDevice, pdev);
fd = vfio_pci->vbasedev.fd;
@@ -250,7 +259,8 @@ retry:
if (ioctl(fd, VFIO_DEVICE_GET_INFO, info)) {
trace_s390_pci_clp_dev_info(vfio_pci->vbasedev.name);
- return;
+ g_free(info);
+ return NULL;
}
if (info->argsz > argsz) {
@@ -259,6 +269,47 @@ retry:
goto retry;
}
+ return info;
+}
+
+/*
+ * Get the host function handle from the vfio CLP capabilities chain. Returns
+ * true if a fh value was placed into the provided buffer. Returns false
+ * if a fh could not be obtained (ioctl failed or capabilitiy version does
+ * not include the fh)
+ */
+bool s390_pci_get_host_fh(S390PCIBusDevice *pbdev, uint32_t *fh)
+{
+ g_autofree struct vfio_device_info *info = NULL;
+
+ assert(fh);
+
+ info = get_device_info(pbdev, sizeof(*info));
+ if (!info) {
+ return false;
+ }
+
+ return get_host_fh(pbdev, info, fh);
+}
+
+/*
+ * This function will issue the VFIO_DEVICE_GET_INFO ioctl and look for
+ * capabilities that contain information about CLP features provided by the
+ * underlying host.
+ * On entry, defaults have already been placed into the guest CLP response
+ * buffers. On exit, defaults will have been overwritten for any CLP features
+ * found in the capability chain; defaults will remain for any CLP features not
+ * found in the chain.
+ */
+void s390_pci_get_clp_info(S390PCIBusDevice *pbdev)
+{
+ g_autofree struct vfio_device_info *info = NULL;
+
+ info = get_device_info(pbdev, sizeof(*info));
+ if (!info) {
+ return;
+ }
+
/*
* Find the CLP features provided and fill in the guest CLP responses.
* Always call s390_pci_read_base first as information from this could
diff --git a/include/hw/s390x/s390-pci-vfio.h b/include/hw/s390x/s390-pci-vfio.h
index ff708aef50..ae1b126ff7 100644
--- a/include/hw/s390x/s390-pci-vfio.h
+++ b/include/hw/s390x/s390-pci-vfio.h
@@ -20,6 +20,7 @@ bool s390_pci_update_dma_avail(int fd, unsigned int *avail);
S390PCIDMACount *s390_pci_start_dma_count(S390pciState *s,
S390PCIBusDevice *pbdev);
void s390_pci_end_dma_count(S390pciState *s, S390PCIDMACount *cnt);
+bool s390_pci_get_host_fh(S390PCIBusDevice *pbdev, uint32_t *fh);
void s390_pci_get_clp_info(S390PCIBusDevice *pbdev);
#else
static inline bool s390_pci_update_dma_avail(int fd, unsigned int *avail)
@@ -33,6 +34,10 @@ static inline S390PCIDMACount *s390_pci_start_dma_count(S390pciState *s,
}
static inline void s390_pci_end_dma_count(S390pciState *s,
S390PCIDMACount *cnt) { }
+static inline bool s390_pci_get_host_fh(S390PCIBusDevice *pbdev, uint32_t *fh)
+{
+ return false;
+}
static inline void s390_pci_get_clp_info(S390PCIBusDevice *pbdev) { }
#endif
--
2.37.3

99
SOURCES/kvm-s390x-pci-add-supported-DT-information-to-clp-respon.patch Normal file
View File

@ -0,0 +1,99 @@
From de6319fe0ce09297beae5ff4636c03217abe6f26 Mon Sep 17 00:00:00 2001
From: Matthew Rosato <mjrosato@linux.ibm.com>
Date: Fri, 3 Dec 2021 09:27:06 -0500
Subject: [PATCH 04/42] s390x/pci: add supported DT information to clp response
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [4/41] 275668f6d38fbc1dfa2f1aa8f58b2c319de2657d
The DTSM is a mask that specifies which I/O Address Translation designation
types are supported. Today QEMU only supports DT=1.
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Message-Id: <20211203142706.427279-5-mjrosato@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit ac6aa30ac47b2abaf142f76de46374da2a98f6e7)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
hw/s390x/s390-pci-bus.c | 1 +
hw/s390x/s390-pci-inst.c | 1 +
hw/s390x/s390-pci-vfio.c | 1 +
include/hw/s390x/s390-pci-bus.h | 1 +
include/hw/s390x/s390-pci-clp.h | 3 ++-
5 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c
index 1b51a72838..01b58ebc70 100644
--- a/hw/s390x/s390-pci-bus.c
+++ b/hw/s390x/s390-pci-bus.c
@@ -782,6 +782,7 @@ static void s390_pci_init_default_group(void)
resgrp->i = 128;
resgrp->maxstbl = 128;
resgrp->version = 0;
+ resgrp->dtsm = ZPCI_DTSM;
}
static void set_pbdev_info(S390PCIBusDevice *pbdev)
diff --git a/hw/s390x/s390-pci-inst.c b/hw/s390x/s390-pci-inst.c
index 07bab85ce5..6d400d4147 100644
--- a/hw/s390x/s390-pci-inst.c
+++ b/hw/s390x/s390-pci-inst.c
@@ -329,6 +329,7 @@ int clp_service_call(S390CPU *cpu, uint8_t r2, uintptr_t ra)
stw_p(&resgrp->i, group->zpci_group.i);
stw_p(&resgrp->maxstbl, group->zpci_group.maxstbl);
resgrp->version = group->zpci_group.version;
+ resgrp->dtsm = group->zpci_group.dtsm;
stw_p(&resgrp->hdr.rsp, CLP_RC_OK);
break;
}
diff --git a/hw/s390x/s390-pci-vfio.c b/hw/s390x/s390-pci-vfio.c
index 2a153fa8c9..6f80a47e29 100644
--- a/hw/s390x/s390-pci-vfio.c
+++ b/hw/s390x/s390-pci-vfio.c
@@ -160,6 +160,7 @@ static void s390_pci_read_group(S390PCIBusDevice *pbdev,
resgrp->i = cap->noi;
resgrp->maxstbl = cap->maxstbl;
resgrp->version = cap->version;
+ resgrp->dtsm = ZPCI_DTSM;
}
}
diff --git a/include/hw/s390x/s390-pci-bus.h b/include/hw/s390x/s390-pci-bus.h
index 2727e7bdef..da3cde2bb4 100644
--- a/include/hw/s390x/s390-pci-bus.h
+++ b/include/hw/s390x/s390-pci-bus.h
@@ -37,6 +37,7 @@
#define ZPCI_MAX_UID 0xffff
#define UID_UNDEFINED 0
#define UID_CHECKING_ENABLED 0x01
+#define ZPCI_DTSM 0x40
OBJECT_DECLARE_SIMPLE_TYPE(S390pciState, S390_PCI_HOST_BRIDGE)
OBJECT_DECLARE_SIMPLE_TYPE(S390PCIBus, S390_PCI_BUS)
diff --git a/include/hw/s390x/s390-pci-clp.h b/include/hw/s390x/s390-pci-clp.h
index 96b8e3f133..cc8c8662b8 100644
--- a/include/hw/s390x/s390-pci-clp.h
+++ b/include/hw/s390x/s390-pci-clp.h
@@ -163,7 +163,8 @@ typedef struct ClpRspQueryPciGrp {
uint8_t fr;
uint16_t maxstbl;
uint16_t mui;
- uint64_t reserved3;
+ uint8_t dtsm;
+ uint8_t reserved3[7];
uint64_t dasm; /* dma address space mask */
uint64_t msia; /* MSI address */
uint64_t reserved4;
--
2.37.3

125
SOURCES/kvm-s390x-pci-coalesce-unmap-operations.patch Normal file
View File

@ -0,0 +1,125 @@
From b972c5a2763a91024725c147cf1691ed8e180c7c Mon Sep 17 00:00:00 2001
From: Matthew Rosato <mjrosato@linux.ibm.com>
Date: Fri, 28 Oct 2022 15:47:57 -0400
Subject: [PATCH 09/11] s390x/pci: coalesce unmap operations
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 250: s390x/pci: reset ISM passthrough devices on shutdown and system reset
RH-Bugzilla: 2163713
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [2/4] 7b5ee38eca565f5a7cbede4b9883ba3a508fb46c
Currently, each unmapped page is handled as an individual iommu
region notification. Attempt to group contiguous unmap operations
into fewer notifications to reduce overhead.
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Message-Id: <20221028194758.204007-3-mjrosato@linux.ibm.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit ef536007c3301bbd6a787e4c2210ea289adaa6f0)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
hw/s390x/s390-pci-inst.c | 51 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 51 insertions(+)
diff --git a/hw/s390x/s390-pci-inst.c b/hw/s390x/s390-pci-inst.c
index 7cc4bcf850..66e764f901 100644
--- a/hw/s390x/s390-pci-inst.c
+++ b/hw/s390x/s390-pci-inst.c
@@ -640,6 +640,8 @@ static uint32_t s390_pci_update_iotlb(S390PCIIOMMU *iommu,
}
g_hash_table_remove(iommu->iotlb, &entry->iova);
inc_dma_avail(iommu);
+ /* Don't notify the iommu yet, maybe we can bundle contiguous unmaps */
+ goto out;
} else {
if (cache) {
if (cache->perm == entry->perm &&
@@ -663,15 +665,44 @@ static uint32_t s390_pci_update_iotlb(S390PCIIOMMU *iommu,
dec_dma_avail(iommu);
}
+ /*
+ * All associated iotlb entries have already been cleared, trigger the
+ * unmaps.
+ */
memory_region_notify_iommu(&iommu->iommu_mr, 0, event);
out:
return iommu->dma_limit ? iommu->dma_limit->avail : 1;
}
+static void s390_pci_batch_unmap(S390PCIIOMMU *iommu, uint64_t iova,
+ uint64_t len)
+{
+ uint64_t remain = len, start = iova, end = start + len - 1, mask, size;
+ IOMMUTLBEvent event = {
+ .type = IOMMU_NOTIFIER_UNMAP,
+ .entry = {
+ .target_as = &address_space_memory,
+ .translated_addr = 0,
+ .perm = IOMMU_NONE,
+ },
+ };
+
+ while (remain >= TARGET_PAGE_SIZE) {
+ mask = dma_aligned_pow2_mask(start, end, 64);
+ size = mask + 1;
+ event.entry.iova = start;
+ event.entry.addr_mask = mask;
+ memory_region_notify_iommu(&iommu->iommu_mr, 0, event);
+ start += size;
+ remain -= size;
+ }
+}
+
int rpcit_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2, uintptr_t ra)
{
CPUS390XState *env = &cpu->env;
+ uint64_t iova, coalesce = 0;
uint32_t fh;
uint16_t error = 0;
S390PCIBusDevice *pbdev;
@@ -742,6 +773,21 @@ int rpcit_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2, uintptr_t ra)
break;
}
+ /*
+ * If this is an unmap of a PTE, let's try to coalesce multiple unmaps
+ * into as few notifier events as possible.
+ */
+ if (entry.perm == IOMMU_NONE && entry.len == TARGET_PAGE_SIZE) {
+ if (coalesce == 0) {
+ iova = entry.iova;
+ }
+ coalesce += entry.len;
+ } else if (coalesce > 0) {
+ /* Unleash the coalesced unmap before processing a new map */
+ s390_pci_batch_unmap(iommu, iova, coalesce);
+ coalesce = 0;
+ }
+
start += entry.len;
while (entry.iova < start && entry.iova < end) {
if (dma_avail > 0 || entry.perm == IOMMU_NONE) {
@@ -759,6 +805,11 @@ int rpcit_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2, uintptr_t ra)
}
}
}
+ if (coalesce) {
+ /* Unleash the coalesced unmap before finishing rpcit */
+ s390_pci_batch_unmap(iommu, iova, coalesce);
+ coalesce = 0;
+ }
if (again && dma_avail > 0)
goto retry;
err:
--
2.37.3

60
SOURCES/kvm-s390x-pci-don-t-fence-interpreted-devices-without-MS.patch Normal file
View File

@ -0,0 +1,60 @@
From 5bd57d8ac3a4e75337eae81a3623b4dc2b417e2f Mon Sep 17 00:00:00 2001
From: Matthew Rosato <mjrosato@linux.ibm.com>
Date: Fri, 2 Sep 2022 13:27:33 -0400
Subject: [PATCH 08/42] s390x/pci: don't fence interpreted devices without
MSI-X
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [8/41] 52bad4368e9494c43133338b386dc0cc159aeedc
Lack of MSI-X support is not an issue for interpreted passthrough
devices, so let's let these in. This will allow, for example, ISM
devices to be passed through -- but only when interpretation is
available and being used.
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Message-Id: <20220902172737.170349-5-mjrosato@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit 15d0e7942d3b31ff71d8e0e8cec3a8203214f19b)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
hw/s390x/s390-pci-bus.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c
index 18bfae0465..07c7c155e3 100644
--- a/hw/s390x/s390-pci-bus.c
+++ b/hw/s390x/s390-pci-bus.c
@@ -881,6 +881,10 @@ static int s390_pci_msix_init(S390PCIBusDevice *pbdev)
static void s390_pci_msix_free(S390PCIBusDevice *pbdev)
{
+ if (pbdev->msix.entries == 0) {
+ return;
+ }
+
memory_region_del_subregion(&pbdev->iommu->mr, &pbdev->msix_notify_mr);
object_unparent(OBJECT(&pbdev->msix_notify_mr));
}
@@ -1093,7 +1097,7 @@ static void s390_pcihost_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
pbdev->interp = false;
}
- if (s390_pci_msix_init(pbdev)) {
+ if (s390_pci_msix_init(pbdev) && !pbdev->interp) {
error_setg(errp, "MSI-X support is mandatory "
"in the S390 architecture");
return;
--
2.37.3

77
SOURCES/kvm-s390x-pci-don-t-use-hard-coded-dma-range-in-reg_ioat.patch Normal file
View File

@ -0,0 +1,77 @@
From 67ebb71d56e95adf185ab4971939e31c4c899863 Mon Sep 17 00:00:00 2001
From: Matthew Rosato <mjrosato@linux.ibm.com>
Date: Fri, 3 Dec 2021 09:27:04 -0500
Subject: [PATCH 02/42] s390x/pci: don't use hard-coded dma range in reg_ioat
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [2/41] c7897321f9848ef8f115130832774bbcd6724f03
Instead use the values from clp info, they will either be the hard-coded
values or what came from the host driver via vfio.
Fixes: 9670ee752727 ("s390x/pci: use a PCI Function structure")
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Message-Id: <20211203142706.427279-3-mjrosato@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit df7ce0a94d9283f0656b4bc0f21566973ff649a3)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
hw/s390x/s390-pci-inst.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/hw/s390x/s390-pci-inst.c b/hw/s390x/s390-pci-inst.c
index 1c8ad91175..11b7f6bfa1 100644
--- a/hw/s390x/s390-pci-inst.c
+++ b/hw/s390x/s390-pci-inst.c
@@ -916,9 +916,10 @@ int pci_dereg_irqs(S390PCIBusDevice *pbdev)
return 0;
}
-static int reg_ioat(CPUS390XState *env, S390PCIIOMMU *iommu, ZpciFib fib,
+static int reg_ioat(CPUS390XState *env, S390PCIBusDevice *pbdev, ZpciFib fib,
uintptr_t ra)
{
+ S390PCIIOMMU *iommu = pbdev->iommu;
uint64_t pba = ldq_p(&fib.pba);
uint64_t pal = ldq_p(&fib.pal);
uint64_t g_iota = ldq_p(&fib.iota);
@@ -927,7 +928,7 @@ static int reg_ioat(CPUS390XState *env, S390PCIIOMMU *iommu, ZpciFib fib,
pba &= ~0xfff;
pal |= 0xfff;
- if (pba > pal || pba < ZPCI_SDMA_ADDR || pal > ZPCI_EDMA_ADDR) {
+ if (pba > pal || pba < pbdev->zpci_fn.sdma || pal > pbdev->zpci_fn.edma) {
s390_program_interrupt(env, PGM_OPERAND, ra);
return -EINVAL;
}
@@ -1125,7 +1126,7 @@ int mpcifc_service_call(S390CPU *cpu, uint8_t r1, uint64_t fiba, uint8_t ar,
} else if (pbdev->iommu->enabled) {
cc = ZPCI_PCI_LS_ERR;
s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
- } else if (reg_ioat(env, pbdev->iommu, fib, ra)) {
+ } else if (reg_ioat(env, pbdev, fib, ra)) {
cc = ZPCI_PCI_LS_ERR;
s390_set_status_code(env, r1, ZPCI_MOD_ST_INSUF_RES);
}
@@ -1150,7 +1151,7 @@ int mpcifc_service_call(S390CPU *cpu, uint8_t r1, uint64_t fiba, uint8_t ar,
s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
} else {
pci_dereg_ioat(pbdev->iommu);
- if (reg_ioat(env, pbdev->iommu, fib, ra)) {
+ if (reg_ioat(env, pbdev, fib, ra)) {
cc = ZPCI_PCI_LS_ERR;
s390_set_status_code(env, r1, ZPCI_MOD_ST_INSUF_RES);
}
--
2.37.3

265
SOURCES/kvm-s390x-pci-enable-adapter-event-notification-for-inte.patch Normal file
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@ -0,0 +1,265 @@
From 362fae654bbae03741003e565fb95d73d8c0025f Mon Sep 17 00:00:00 2001
From: Matthew Rosato <mjrosato@linux.ibm.com>
Date: Fri, 2 Sep 2022 13:27:34 -0400
Subject: [PATCH 09/42] s390x/pci: enable adapter event notification for
interpreted devices
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [9/41] 771975c436c7cb608e0e9e40edd732ac310beb69
Use the associated kvm ioctl operation to enable adapter event notification
and forwarding for devices when requested. This feature will be set up
with or without firmware assist based upon the 'forwarding_assist' setting.
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Message-Id: <20220902172737.170349-6-mjrosato@linux.ibm.com>
[thuth: Rename "forwarding_assist" property to "forwarding-assist"]
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit d0bc7091c2013ad2fa164100cf7b17962370e8ab)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
hw/s390x/s390-pci-bus.c | 20 ++++++++++++++---
hw/s390x/s390-pci-inst.c | 40 +++++++++++++++++++++++++++++++--
hw/s390x/s390-pci-kvm.c | 30 +++++++++++++++++++++++++
include/hw/s390x/s390-pci-bus.h | 1 +
include/hw/s390x/s390-pci-kvm.h | 14 ++++++++++++
5 files changed, 100 insertions(+), 5 deletions(-)
diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c
index 07c7c155e3..cd152ce711 100644
--- a/hw/s390x/s390-pci-bus.c
+++ b/hw/s390x/s390-pci-bus.c
@@ -190,7 +190,10 @@ void s390_pci_sclp_deconfigure(SCCB *sccb)
rc = SCLP_RC_NO_ACTION_REQUIRED;
break;
default:
- if (pbdev->summary_ind) {
+ if (pbdev->interp && (pbdev->fh & FH_MASK_ENABLE)) {
+ /* Interpreted devices were using interrupt forwarding */
+ s390_pci_kvm_aif_disable(pbdev);
+ } else if (pbdev->summary_ind) {
pci_dereg_irqs(pbdev);
}
if (pbdev->iommu->enabled) {
@@ -1082,6 +1085,7 @@ static void s390_pcihost_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
} else {
DPRINTF("zPCI interpretation facilities missing.\n");
pbdev->interp = false;
+ pbdev->forwarding_assist = false;
}
}
pbdev->iommu->dma_limit = s390_pci_start_dma_count(s, pbdev);
@@ -1090,11 +1094,13 @@ static void s390_pcihost_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
if (!pbdev->interp) {
/* Do vfio passthrough but intercept for I/O */
pbdev->fh |= FH_SHM_VFIO;
+ pbdev->forwarding_assist = false;
}
} else {
pbdev->fh |= FH_SHM_EMUL;
/* Always intercept emulated devices */
pbdev->interp = false;
+ pbdev->forwarding_assist = false;
}
if (s390_pci_msix_init(pbdev) && !pbdev->interp) {
@@ -1244,7 +1250,10 @@ static void s390_pcihost_reset(DeviceState *dev)
/* Process all pending unplug requests */
QTAILQ_FOREACH_SAFE(pbdev, &s->zpci_devs, link, next) {
if (pbdev->unplug_requested) {
- if (pbdev->summary_ind) {
+ if (pbdev->interp && (pbdev->fh & FH_MASK_ENABLE)) {
+ /* Interpreted devices were using interrupt forwarding */
+ s390_pci_kvm_aif_disable(pbdev);
+ } else if (pbdev->summary_ind) {
pci_dereg_irqs(pbdev);
}
if (pbdev->iommu->enabled) {
@@ -1382,7 +1391,10 @@ static void s390_pci_device_reset(DeviceState *dev)
break;
}
- if (pbdev->summary_ind) {
+ if (pbdev->interp && (pbdev->fh & FH_MASK_ENABLE)) {
+ /* Interpreted devices were using interrupt forwarding */
+ s390_pci_kvm_aif_disable(pbdev);
+ } else if (pbdev->summary_ind) {
pci_dereg_irqs(pbdev);
}
if (pbdev->iommu->enabled) {
@@ -1428,6 +1440,8 @@ static Property s390_pci_device_properties[] = {
DEFINE_PROP_S390_PCI_FID("fid", S390PCIBusDevice, fid),
DEFINE_PROP_STRING("target", S390PCIBusDevice, target),
DEFINE_PROP_BOOL("interpret", S390PCIBusDevice, interp, true),
+ DEFINE_PROP_BOOL("forwarding-assist", S390PCIBusDevice, forwarding_assist,
+ true),
DEFINE_PROP_END_OF_LIST(),
};
diff --git a/hw/s390x/s390-pci-inst.c b/hw/s390x/s390-pci-inst.c
index 651ec38635..20a9bcc7af 100644
--- a/hw/s390x/s390-pci-inst.c
+++ b/hw/s390x/s390-pci-inst.c
@@ -1066,6 +1066,32 @@ static void fmb_update(void *opaque)
timer_mod(pbdev->fmb_timer, t + pbdev->pci_group->zpci_group.mui);
}
+static int mpcifc_reg_int_interp(S390PCIBusDevice *pbdev, ZpciFib *fib)
+{
+ int rc;
+
+ rc = s390_pci_kvm_aif_enable(pbdev, fib, pbdev->forwarding_assist);
+ if (rc) {
+ DPRINTF("Failed to enable interrupt forwarding\n");
+ return rc;
+ }
+
+ return 0;
+}
+
+static int mpcifc_dereg_int_interp(S390PCIBusDevice *pbdev, ZpciFib *fib)
+{
+ int rc;
+
+ rc = s390_pci_kvm_aif_disable(pbdev);
+ if (rc) {
+ DPRINTF("Failed to disable interrupt forwarding\n");
+ return rc;
+ }
+
+ return 0;
+}
+
int mpcifc_service_call(S390CPU *cpu, uint8_t r1, uint64_t fiba, uint8_t ar,
uintptr_t ra)
{
@@ -1120,7 +1146,12 @@ int mpcifc_service_call(S390CPU *cpu, uint8_t r1, uint64_t fiba, uint8_t ar,
switch (oc) {
case ZPCI_MOD_FC_REG_INT:
- if (pbdev->summary_ind) {
+ if (pbdev->interp) {
+ if (mpcifc_reg_int_interp(pbdev, &fib)) {
+ cc = ZPCI_PCI_LS_ERR;
+ s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
+ }
+ } else if (pbdev->summary_ind) {
cc = ZPCI_PCI_LS_ERR;
s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
} else if (reg_irqs(env, pbdev, fib)) {
@@ -1129,7 +1160,12 @@ int mpcifc_service_call(S390CPU *cpu, uint8_t r1, uint64_t fiba, uint8_t ar,
}
break;
case ZPCI_MOD_FC_DEREG_INT:
- if (!pbdev->summary_ind) {
+ if (pbdev->interp) {
+ if (mpcifc_dereg_int_interp(pbdev, &fib)) {
+ cc = ZPCI_PCI_LS_ERR;
+ s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
+ }
+ } else if (!pbdev->summary_ind) {
cc = ZPCI_PCI_LS_ERR;
s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
} else {
diff --git a/hw/s390x/s390-pci-kvm.c b/hw/s390x/s390-pci-kvm.c
index 0f16104a74..9134fe185f 100644
--- a/hw/s390x/s390-pci-kvm.c
+++ b/hw/s390x/s390-pci-kvm.c
@@ -11,12 +11,42 @@
#include "qemu/osdep.h"
+#include <linux/kvm.h>
+
#include "kvm/kvm_s390x.h"
#include "hw/s390x/pv.h"
+#include "hw/s390x/s390-pci-bus.h"
#include "hw/s390x/s390-pci-kvm.h"
+#include "hw/s390x/s390-pci-inst.h"
#include "cpu_models.h"
bool s390_pci_kvm_interp_allowed(void)
{
return kvm_s390_get_zpci_op() && !s390_is_pv();
}
+
+int s390_pci_kvm_aif_enable(S390PCIBusDevice *pbdev, ZpciFib *fib, bool assist)
+{
+ struct kvm_s390_zpci_op args = {
+ .fh = pbdev->fh,
+ .op = KVM_S390_ZPCIOP_REG_AEN,
+ .u.reg_aen.ibv = fib->aibv,
+ .u.reg_aen.sb = fib->aisb,
+ .u.reg_aen.noi = FIB_DATA_NOI(fib->data),
+ .u.reg_aen.isc = FIB_DATA_ISC(fib->data),
+ .u.reg_aen.sbo = FIB_DATA_AISBO(fib->data),
+ .u.reg_aen.flags = (assist) ? 0 : KVM_S390_ZPCIOP_REGAEN_HOST
+ };
+
+ return kvm_vm_ioctl(kvm_state, KVM_S390_ZPCI_OP, &args);
+}
+
+int s390_pci_kvm_aif_disable(S390PCIBusDevice *pbdev)
+{
+ struct kvm_s390_zpci_op args = {
+ .fh = pbdev->fh,
+ .op = KVM_S390_ZPCIOP_DEREG_AEN
+ };
+
+ return kvm_vm_ioctl(kvm_state, KVM_S390_ZPCI_OP, &args);
+}
diff --git a/include/hw/s390x/s390-pci-bus.h b/include/hw/s390x/s390-pci-bus.h
index a9843dfe97..5b09f0cf2f 100644
--- a/include/hw/s390x/s390-pci-bus.h
+++ b/include/hw/s390x/s390-pci-bus.h
@@ -351,6 +351,7 @@ struct S390PCIBusDevice {
bool pci_unplug_request_processed;
bool unplug_requested;
bool interp;
+ bool forwarding_assist;
QTAILQ_ENTRY(S390PCIBusDevice) link;
};
diff --git a/include/hw/s390x/s390-pci-kvm.h b/include/hw/s390x/s390-pci-kvm.h
index 80a2e7d0ca..933814a402 100644
--- a/include/hw/s390x/s390-pci-kvm.h
+++ b/include/hw/s390x/s390-pci-kvm.h
@@ -12,13 +12,27 @@
#ifndef HW_S390_PCI_KVM_H
#define HW_S390_PCI_KVM_H
+#include "hw/s390x/s390-pci-bus.h"
+#include "hw/s390x/s390-pci-inst.h"
+
#ifdef CONFIG_KVM
bool s390_pci_kvm_interp_allowed(void);
+int s390_pci_kvm_aif_enable(S390PCIBusDevice *pbdev, ZpciFib *fib, bool assist);
+int s390_pci_kvm_aif_disable(S390PCIBusDevice *pbdev);
#else
static inline bool s390_pci_kvm_interp_allowed(void)
{
return false;
}
+static inline int s390_pci_kvm_aif_enable(S390PCIBusDevice *pbdev, ZpciFib *fib,
+ bool assist)
+{
+ return -EINVAL;
+}
+static inline int s390_pci_kvm_aif_disable(S390PCIBusDevice *pbdev)
+{
+ return -EINVAL;
+}
#endif
#endif
--
2.37.3

319
SOURCES/kvm-s390x-pci-enable-for-load-store-interpretation.patch Normal file
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@ -0,0 +1,319 @@
From 62fbb66d18f598d0896164383aab465e093fb0c1 Mon Sep 17 00:00:00 2001
From: Matthew Rosato <mjrosato@linux.ibm.com>
Date: Fri, 2 Sep 2022 13:27:32 -0400
Subject: [PATCH 07/42] s390x/pci: enable for load/store interpretation
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [7/41] 3a96e901e295bb9e0c530638c45b5da5d60c00bd
If the ZPCI_OP ioctl reports that is is available and usable, then the
underlying KVM host will enable load/store intepretation for any guest
device without a SHM bit in the guest function handle. For a device that
will be using interpretation support, ensure the guest function handle
matches the host function handle; this value is re-checked every time the
guest issues a SET PCI FN to enable the guest device as it is the only
opportunity to reflect function handle changes.
By default, unless interpret=off is specified, interpretation support will
always be assumed and exploited if the necessary ioctl and features are
available on the host kernel. When these are unavailable, we will silently
revert to the interception model; this allows existing guest configurations
to work unmodified on hosts with and without zPCI interpretation support,
allowing QEMU to choose the best support model available.
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Acked-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20220902172737.170349-4-mjrosato@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit dd1d5fd9684beeb0c14c39f497ef2aa9ac683aa7)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
hw/s390x/meson.build | 1 +
hw/s390x/s390-pci-bus.c | 66 ++++++++++++++++++++++++++++++++-
hw/s390x/s390-pci-inst.c | 16 ++++++++
hw/s390x/s390-pci-kvm.c | 22 +++++++++++
include/hw/s390x/s390-pci-bus.h | 1 +
include/hw/s390x/s390-pci-kvm.h | 24 ++++++++++++
target/s390x/kvm/kvm.c | 7 ++++
target/s390x/kvm/kvm_s390x.h | 1 +
8 files changed, 137 insertions(+), 1 deletion(-)
create mode 100644 hw/s390x/s390-pci-kvm.c
create mode 100644 include/hw/s390x/s390-pci-kvm.h
diff --git a/hw/s390x/meson.build b/hw/s390x/meson.build
index 28484256ec..6e6e47fcda 100644
--- a/hw/s390x/meson.build
+++ b/hw/s390x/meson.build
@@ -23,6 +23,7 @@ s390x_ss.add(when: 'CONFIG_KVM', if_true: files(
's390-skeys-kvm.c',
's390-stattrib-kvm.c',
'pv.c',
+ 's390-pci-kvm.c',
))
s390x_ss.add(when: 'CONFIG_TCG', if_true: files(
'tod-tcg.c',
diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c
index 01b58ebc70..18bfae0465 100644
--- a/hw/s390x/s390-pci-bus.c
+++ b/hw/s390x/s390-pci-bus.c
@@ -16,6 +16,7 @@
#include "qapi/visitor.h"
#include "hw/s390x/s390-pci-bus.h"
#include "hw/s390x/s390-pci-inst.h"
+#include "hw/s390x/s390-pci-kvm.h"
#include "hw/s390x/s390-pci-vfio.h"
#include "hw/pci/pci_bus.h"
#include "hw/qdev-properties.h"
@@ -971,12 +972,51 @@ static void s390_pci_update_subordinate(PCIDevice *dev, uint32_t nr)
}
}
+static int s390_pci_interp_plug(S390pciState *s, S390PCIBusDevice *pbdev)
+{
+ uint32_t idx, fh;
+
+ if (!s390_pci_get_host_fh(pbdev, &fh)) {
+ return -EPERM;
+ }
+
+ /*
+ * The host device is already in an enabled state, but we always present
+ * the initial device state to the guest as disabled (ZPCI_FS_DISABLED).
+ * Therefore, mask off the enable bit from the passthrough handle until
+ * the guest issues a CLP SET PCI FN later to enable the device.
+ */
+ pbdev->fh = fh & ~FH_MASK_ENABLE;
+
+ /* Next, see if the idx is already in-use */
+ idx = pbdev->fh & FH_MASK_INDEX;
+ if (pbdev->idx != idx) {
+ if (s390_pci_find_dev_by_idx(s, idx)) {
+ return -EINVAL;
+ }
+ /*
+ * Update the idx entry with the passed through idx
+ * If the relinquished idx is lower than next_idx, use it
+ * to replace next_idx
+ */
+ g_hash_table_remove(s->zpci_table, &pbdev->idx);
+ if (idx < s->next_idx) {
+ s->next_idx = idx;
+ }
+ pbdev->idx = idx;
+ g_hash_table_insert(s->zpci_table, &pbdev->idx, pbdev);
+ }
+
+ return 0;
+}
+
static void s390_pcihost_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
Error **errp)
{
S390pciState *s = S390_PCI_HOST_BRIDGE(hotplug_dev);
PCIDevice *pdev = NULL;
S390PCIBusDevice *pbdev = NULL;
+ int rc;
if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_BRIDGE)) {
PCIBridge *pb = PCI_BRIDGE(dev);
@@ -1022,12 +1062,35 @@ static void s390_pcihost_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
set_pbdev_info(pbdev);
if (object_dynamic_cast(OBJECT(dev), "vfio-pci")) {
- pbdev->fh |= FH_SHM_VFIO;
+ /*
+ * By default, interpretation is always requested; if the available
+ * facilities indicate it is not available, fallback to the
+ * interception model.
+ */
+ if (pbdev->interp) {
+ if (s390_pci_kvm_interp_allowed()) {
+ rc = s390_pci_interp_plug(s, pbdev);
+ if (rc) {
+ error_setg(errp, "Plug failed for zPCI device in "
+ "interpretation mode: %d", rc);
+ return;
+ }
+ } else {
+ DPRINTF("zPCI interpretation facilities missing.\n");
+ pbdev->interp = false;
+ }
+ }
pbdev->iommu->dma_limit = s390_pci_start_dma_count(s, pbdev);
/* Fill in CLP information passed via the vfio region */
s390_pci_get_clp_info(pbdev);
+ if (!pbdev->interp) {
+ /* Do vfio passthrough but intercept for I/O */
+ pbdev->fh |= FH_SHM_VFIO;
+ }
} else {
pbdev->fh |= FH_SHM_EMUL;
+ /* Always intercept emulated devices */
+ pbdev->interp = false;
}
if (s390_pci_msix_init(pbdev)) {
@@ -1360,6 +1423,7 @@ static Property s390_pci_device_properties[] = {
DEFINE_PROP_UINT16("uid", S390PCIBusDevice, uid, UID_UNDEFINED),
DEFINE_PROP_S390_PCI_FID("fid", S390PCIBusDevice, fid),
DEFINE_PROP_STRING("target", S390PCIBusDevice, target),
+ DEFINE_PROP_BOOL("interpret", S390PCIBusDevice, interp, true),
DEFINE_PROP_END_OF_LIST(),
};
diff --git a/hw/s390x/s390-pci-inst.c b/hw/s390x/s390-pci-inst.c
index 6d400d4147..651ec38635 100644
--- a/hw/s390x/s390-pci-inst.c
+++ b/hw/s390x/s390-pci-inst.c
@@ -18,6 +18,8 @@
#include "sysemu/hw_accel.h"
#include "hw/s390x/s390-pci-inst.h"
#include "hw/s390x/s390-pci-bus.h"
+#include "hw/s390x/s390-pci-kvm.h"
+#include "hw/s390x/s390-pci-vfio.h"
#include "hw/s390x/tod.h"
#ifndef DEBUG_S390PCI_INST
@@ -246,6 +248,20 @@ int clp_service_call(S390CPU *cpu, uint8_t r2, uintptr_t ra)
goto out;
}
+ /*
+ * Take this opportunity to make sure we still have an accurate
+ * host fh. It's possible part of the handle changed while the
+ * device was disabled to the guest (e.g. vfio hot reset for
+ * ISM during plug)
+ */
+ if (pbdev->interp) {
+ /* Take this opportunity to make sure we are sync'd with host */
+ if (!s390_pci_get_host_fh(pbdev, &pbdev->fh) ||
+ !(pbdev->fh & FH_MASK_ENABLE)) {
+ stw_p(&ressetpci->hdr.rsp, CLP_RC_SETPCIFN_FH);
+ goto out;
+ }
+ }
pbdev->fh |= FH_MASK_ENABLE;
pbdev->state = ZPCI_FS_ENABLED;
stl_p(&ressetpci->fh, pbdev->fh);
diff --git a/hw/s390x/s390-pci-kvm.c b/hw/s390x/s390-pci-kvm.c
new file mode 100644
index 0000000000..0f16104a74
--- /dev/null
+++ b/hw/s390x/s390-pci-kvm.c
@@ -0,0 +1,22 @@
+/*
+ * s390 zPCI KVM interfaces
+ *
+ * Copyright 2022 IBM Corp.
+ * Author(s): Matthew Rosato <mjrosato@linux.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#include "qemu/osdep.h"
+
+#include "kvm/kvm_s390x.h"
+#include "hw/s390x/pv.h"
+#include "hw/s390x/s390-pci-kvm.h"
+#include "cpu_models.h"
+
+bool s390_pci_kvm_interp_allowed(void)
+{
+ return kvm_s390_get_zpci_op() && !s390_is_pv();
+}
diff --git a/include/hw/s390x/s390-pci-bus.h b/include/hw/s390x/s390-pci-bus.h
index da3cde2bb4..a9843dfe97 100644
--- a/include/hw/s390x/s390-pci-bus.h
+++ b/include/hw/s390x/s390-pci-bus.h
@@ -350,6 +350,7 @@ struct S390PCIBusDevice {
IndAddr *indicator;
bool pci_unplug_request_processed;
bool unplug_requested;
+ bool interp;
QTAILQ_ENTRY(S390PCIBusDevice) link;
};
diff --git a/include/hw/s390x/s390-pci-kvm.h b/include/hw/s390x/s390-pci-kvm.h
new file mode 100644
index 0000000000..80a2e7d0ca
--- /dev/null
+++ b/include/hw/s390x/s390-pci-kvm.h
@@ -0,0 +1,24 @@
+/*
+ * s390 PCI KVM interfaces
+ *
+ * Copyright 2022 IBM Corp.
+ * Author(s): Matthew Rosato <mjrosato@linux.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#ifndef HW_S390_PCI_KVM_H
+#define HW_S390_PCI_KVM_H
+
+#ifdef CONFIG_KVM
+bool s390_pci_kvm_interp_allowed(void);
+#else
+static inline bool s390_pci_kvm_interp_allowed(void)
+{
+ return false;
+}
+#endif
+
+#endif
diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c
index ba04997da1..30712487d4 100644
--- a/target/s390x/kvm/kvm.c
+++ b/target/s390x/kvm/kvm.c
@@ -158,6 +158,7 @@ static int cap_ri;
static int cap_hpage_1m;
static int cap_vcpu_resets;
static int cap_protected;
+static int cap_zpci_op;
static bool mem_op_storage_key_support;
@@ -363,6 +364,7 @@ int kvm_arch_init(MachineState *ms, KVMState *s)
cap_s390_irq = kvm_check_extension(s, KVM_CAP_S390_INJECT_IRQ);
cap_vcpu_resets = kvm_check_extension(s, KVM_CAP_S390_VCPU_RESETS);
cap_protected = kvm_check_extension(s, KVM_CAP_S390_PROTECTED);
+ cap_zpci_op = kvm_check_extension(s, KVM_CAP_S390_ZPCI_OP);
kvm_vm_enable_cap(s, KVM_CAP_S390_USER_SIGP, 0);
kvm_vm_enable_cap(s, KVM_CAP_S390_VECTOR_REGISTERS, 0);
@@ -2579,3 +2581,8 @@ bool kvm_arch_cpu_check_are_resettable(void)
{
return true;
}
+
+int kvm_s390_get_zpci_op(void)
+{
+ return cap_zpci_op;
+}
diff --git a/target/s390x/kvm/kvm_s390x.h b/target/s390x/kvm/kvm_s390x.h
index 05a5e1e6f4..aaae8570de 100644
--- a/target/s390x/kvm/kvm_s390x.h
+++ b/target/s390x/kvm/kvm_s390x.h
@@ -27,6 +27,7 @@ void kvm_s390_vcpu_interrupt_pre_save(S390CPU *cpu);
int kvm_s390_vcpu_interrupt_post_load(S390CPU *cpu);
int kvm_s390_get_hpage_1m(void);
int kvm_s390_get_ri(void);
+int kvm_s390_get_zpci_op(void);
int kvm_s390_get_clock(uint8_t *tod_high, uint64_t *tod_clock);
int kvm_s390_get_clock_ext(uint8_t *tod_high, uint64_t *tod_clock);
int kvm_s390_set_clock(uint8_t tod_high, uint64_t tod_clock);
--
2.37.3

192
SOURCES/kvm-s390x-pci-let-intercept-devices-have-separate-PCI-gr.patch Normal file
View File

@ -0,0 +1,192 @@
From b98a5bc4c21284dd0a8a1c86b91af81fcb75f060 Mon Sep 17 00:00:00 2001
From: Matthew Rosato <mjrosato@linux.ibm.com>
Date: Fri, 2 Sep 2022 13:27:35 -0400
Subject: [PATCH 10/42] s390x/pci: let intercept devices have separate PCI
groups
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [10/41] 1545bdcd2e21386afa9869f0414e96eecb62647d
Let's use the reserved pool of simulated PCI groups to allow intercept
devices to have separate groups from interpreted devices as some group
values may be different. If we run out of simulated PCI groups, subsequent
intercept devices just get the default group.
Furthermore, if we encounter any PCI groups from hostdevs that are marked
as simulated, let's just assign them to the default group to avoid
conflicts between host simulated groups and our own simulated groups.
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Message-Id: <20220902172737.170349-7-mjrosato@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit 30dcf4f7fd23bef7d72a2454c60881710fd4c785)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
hw/s390x/s390-pci-bus.c | 19 ++++++++++++++--
hw/s390x/s390-pci-vfio.c | 40 ++++++++++++++++++++++++++++++---
include/hw/s390x/s390-pci-bus.h | 6 ++++-
3 files changed, 59 insertions(+), 6 deletions(-)
diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c
index cd152ce711..d8b1e44a02 100644
--- a/hw/s390x/s390-pci-bus.c
+++ b/hw/s390x/s390-pci-bus.c
@@ -748,13 +748,14 @@ static void s390_pci_iommu_free(S390pciState *s, PCIBus *bus, int32_t devfn)
object_unref(OBJECT(iommu));
}
-S390PCIGroup *s390_group_create(int id)
+S390PCIGroup *s390_group_create(int id, int host_id)
{
S390PCIGroup *group;
S390pciState *s = s390_get_phb();
group = g_new0(S390PCIGroup, 1);
group->id = id;
+ group->host_id = host_id;
QTAILQ_INSERT_TAIL(&s->zpci_groups, group, link);
return group;
}
@@ -772,12 +773,25 @@ S390PCIGroup *s390_group_find(int id)
return NULL;
}
+S390PCIGroup *s390_group_find_host_sim(int host_id)
+{
+ S390PCIGroup *group;
+ S390pciState *s = s390_get_phb();
+
+ QTAILQ_FOREACH(group, &s->zpci_groups, link) {
+ if (group->id >= ZPCI_SIM_GRP_START && group->host_id == host_id) {
+ return group;
+ }
+ }
+ return NULL;
+}
+
static void s390_pci_init_default_group(void)
{
S390PCIGroup *group;
ClpRspQueryPciGrp *resgrp;
- group = s390_group_create(ZPCI_DEFAULT_FN_GRP);
+ group = s390_group_create(ZPCI_DEFAULT_FN_GRP, ZPCI_DEFAULT_FN_GRP);
resgrp = &group->zpci_group;
resgrp->fr = 1;
resgrp->dasm = 0;
@@ -825,6 +839,7 @@ static void s390_pcihost_realize(DeviceState *dev, Error **errp)
NULL, g_free);
s->zpci_table = g_hash_table_new_full(g_int_hash, g_int_equal, NULL, NULL);
s->bus_no = 0;
+ s->next_sim_grp = ZPCI_SIM_GRP_START;
QTAILQ_INIT(&s->pending_sei);
QTAILQ_INIT(&s->zpci_devs);
QTAILQ_INIT(&s->zpci_dma_limit);
diff --git a/hw/s390x/s390-pci-vfio.c b/hw/s390x/s390-pci-vfio.c
index 08bcc55e85..338f436e87 100644
--- a/hw/s390x/s390-pci-vfio.c
+++ b/hw/s390x/s390-pci-vfio.c
@@ -150,13 +150,18 @@ static void s390_pci_read_group(S390PCIBusDevice *pbdev,
{
struct vfio_info_cap_header *hdr;
struct vfio_device_info_cap_zpci_group *cap;
+ S390pciState *s = s390_get_phb();
ClpRspQueryPciGrp *resgrp;
VFIOPCIDevice *vpci = container_of(pbdev->pdev, VFIOPCIDevice, pdev);
+ uint8_t start_gid = pbdev->zpci_fn.pfgid;
hdr = vfio_get_device_info_cap(info, VFIO_DEVICE_INFO_CAP_ZPCI_GROUP);
- /* If capability not provided, just use the default group */
- if (hdr == NULL) {
+ /*
+ * If capability not provided or the underlying hostdev is simulated, just
+ * use the default group.
+ */
+ if (hdr == NULL || pbdev->zpci_fn.pfgid >= ZPCI_SIM_GRP_START) {
trace_s390_pci_clp_cap(vpci->vbasedev.name,
VFIO_DEVICE_INFO_CAP_ZPCI_GROUP);
pbdev->zpci_fn.pfgid = ZPCI_DEFAULT_FN_GRP;
@@ -165,11 +170,40 @@ static void s390_pci_read_group(S390PCIBusDevice *pbdev,
}
cap = (void *) hdr;
+ /*
+ * For an intercept device, let's use an existing simulated group if one
+ * one was already created for other intercept devices in this group.
+ * If not, create a new simulated group if any are still available.
+ * If all else fails, just fall back on the default group.
+ */
+ if (!pbdev->interp) {
+ pbdev->pci_group = s390_group_find_host_sim(pbdev->zpci_fn.pfgid);
+ if (pbdev->pci_group) {
+ /* Use existing simulated group */
+ pbdev->zpci_fn.pfgid = pbdev->pci_group->id;
+ return;
+ } else {
+ if (s->next_sim_grp == ZPCI_DEFAULT_FN_GRP) {
+ /* All out of simulated groups, use default */
+ trace_s390_pci_clp_cap(vpci->vbasedev.name,
+ VFIO_DEVICE_INFO_CAP_ZPCI_GROUP);
+ pbdev->zpci_fn.pfgid = ZPCI_DEFAULT_FN_GRP;
+ pbdev->pci_group = s390_group_find(ZPCI_DEFAULT_FN_GRP);
+ return;
+ } else {
+ /* We can assign a new simulated group */
+ pbdev->zpci_fn.pfgid = s->next_sim_grp;
+ s->next_sim_grp++;
+ /* Fall through to create the new sim group using CLP info */
+ }
+ }
+ }
+
/* See if the PCI group is already defined, create if not */
pbdev->pci_group = s390_group_find(pbdev->zpci_fn.pfgid);
if (!pbdev->pci_group) {
- pbdev->pci_group = s390_group_create(pbdev->zpci_fn.pfgid);
+ pbdev->pci_group = s390_group_create(pbdev->zpci_fn.pfgid, start_gid);
resgrp = &pbdev->pci_group->zpci_group;
if (cap->flags & VFIO_DEVICE_INFO_ZPCI_FLAG_REFRESH) {
diff --git a/include/hw/s390x/s390-pci-bus.h b/include/hw/s390x/s390-pci-bus.h
index 5b09f0cf2f..0605fcea24 100644
--- a/include/hw/s390x/s390-pci-bus.h
+++ b/include/hw/s390x/s390-pci-bus.h
@@ -315,13 +315,16 @@ typedef struct ZpciFmb {
QEMU_BUILD_BUG_MSG(offsetof(ZpciFmb, fmt0) != 48, "padding in ZpciFmb");
#define ZPCI_DEFAULT_FN_GRP 0xFF
+#define ZPCI_SIM_GRP_START 0xF0
typedef struct S390PCIGroup {
ClpRspQueryPciGrp zpci_group;
int id;
+ int host_id;
QTAILQ_ENTRY(S390PCIGroup) link;
} S390PCIGroup;
-S390PCIGroup *s390_group_create(int id);
+S390PCIGroup *s390_group_create(int id, int host_id);
S390PCIGroup *s390_group_find(int id);
+S390PCIGroup *s390_group_find_host_sim(int host_id);
struct S390PCIBusDevice {
DeviceState qdev;
@@ -370,6 +373,7 @@ struct S390pciState {
QTAILQ_HEAD(, S390PCIBusDevice) zpci_devs;
QTAILQ_HEAD(, S390PCIDMACount) zpci_dma_limit;
QTAILQ_HEAD(, S390PCIGroup) zpci_groups;
+ uint8_t next_sim_grp;
};
S390pciState *s390_get_phb(void);
--
2.37.3

52
SOURCES/kvm-s390x-pci-reflect-proper-maxstbl-for-groups-of-inter.patch Normal file
View File

@ -0,0 +1,52 @@
From 65f90bfccf7500978879c15104a79de58173a06b Mon Sep 17 00:00:00 2001
From: Matthew Rosato <mjrosato@linux.ibm.com>
Date: Fri, 2 Sep 2022 13:27:36 -0400
Subject: [PATCH 11/42] s390x/pci: reflect proper maxstbl for groups of
interpreted devices
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [11/41] 9ac2f5dedef3d743ef621525eef222a3e09d63b3
The maximum supported store block length might be different depending
on whether the instruction is interpretively executed (firmware-reported
maximum) or handled via userspace intercept (host kernel API maximum).
Choose the best available value during group creation.
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Message-Id: <20220902172737.170349-8-mjrosato@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit 9ee8f7e46a7d42ede69a4780200129bf1acb0d01)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
hw/s390x/s390-pci-vfio.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/hw/s390x/s390-pci-vfio.c b/hw/s390x/s390-pci-vfio.c
index 338f436e87..2aefa508a0 100644
--- a/hw/s390x/s390-pci-vfio.c
+++ b/hw/s390x/s390-pci-vfio.c
@@ -213,7 +213,11 @@ static void s390_pci_read_group(S390PCIBusDevice *pbdev,
resgrp->msia = cap->msi_addr;
resgrp->mui = cap->mui;
resgrp->i = cap->noi;
- resgrp->maxstbl = cap->maxstbl;
+ if (pbdev->interp && hdr->version >= 2) {
+ resgrp->maxstbl = cap->imaxstbl;
+ } else {
+ resgrp->maxstbl = cap->maxstbl;
+ }
resgrp->version = cap->version;
resgrp->dtsm = ZPCI_DTSM;
}
--
2.37.3

147
SOURCES/kvm-s390x-pci-reset-ISM-passthrough-devices-on-shutdown-.patch Normal file
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@ -0,0 +1,147 @@
From 9ec96a236be84e34b16681e658d3910fc3877a44 Mon Sep 17 00:00:00 2001
From: Matthew Rosato <mjrosato@linux.ibm.com>
Date: Fri, 9 Dec 2022 14:57:00 -0500
Subject: [PATCH 11/11] s390x/pci: reset ISM passthrough devices on shutdown
and system reset
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 250: s390x/pci: reset ISM passthrough devices on shutdown and system reset
RH-Bugzilla: 2163713
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [4/4] c857d022c7c2f43cdeb66c4f6acfd9272c925b35
ISM device firmware stores unique state information that can
can cause a wholesale unmap of the associated IOMMU (e.g. when
we get a termination signal for QEMU) to trigger firmware errors
because firmware believes we are attempting to invalidate entries
that are still in-use by the guest OS (when in fact that guest is
in the process of being terminated or rebooted).
To alleviate this, register both a shutdown notifier (for unexpected
termination cases e.g. virsh destroy) as well as a reset callback
(for cases like guest OS reboot). For each of these scenarios, trigger
PCI device reset; this is enough to indicate to firmware that the IOMMU
is no longer in-use by the guest OS, making it safe to invalidate any
associated IOMMU entries.
Fixes: 15d0e7942d3b ("s390x/pci: don't fence interpreted devices without MSI-X")
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Message-Id: <20221209195700.263824-1-mjrosato@linux.ibm.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
[thuth: Adjusted the hunk in s390-pci-vfio.c due to different context]
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit 03451953c79e6b31f7860ee0c35b28e181d573c1)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
hw/s390x/s390-pci-bus.c | 28 ++++++++++++++++++++++++++++
hw/s390x/s390-pci-vfio.c | 2 ++
include/hw/s390x/s390-pci-bus.h | 5 +++++
3 files changed, 35 insertions(+)
diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c
index d8b1e44a02..2d92848b0f 100644
--- a/hw/s390x/s390-pci-bus.c
+++ b/hw/s390x/s390-pci-bus.c
@@ -24,6 +24,8 @@
#include "hw/pci/msi.h"
#include "qemu/error-report.h"
#include "qemu/module.h"
+#include "sysemu/reset.h"
+#include "sysemu/runstate.h"
#ifndef DEBUG_S390PCI_BUS
#define DEBUG_S390PCI_BUS 0
@@ -150,10 +152,30 @@ out:
psccb->header.response_code = cpu_to_be16(rc);
}
+static void s390_pci_shutdown_notifier(Notifier *n, void *opaque)
+{
+ S390PCIBusDevice *pbdev = container_of(n, S390PCIBusDevice,
+ shutdown_notifier);
+
+ pci_device_reset(pbdev->pdev);
+}
+
+static void s390_pci_reset_cb(void *opaque)
+{
+ S390PCIBusDevice *pbdev = opaque;
+
+ pci_device_reset(pbdev->pdev);
+}
+
static void s390_pci_perform_unplug(S390PCIBusDevice *pbdev)
{
HotplugHandler *hotplug_ctrl;
+ if (pbdev->pft == ZPCI_PFT_ISM) {
+ notifier_remove(&pbdev->shutdown_notifier);
+ qemu_unregister_reset(s390_pci_reset_cb, pbdev);
+ }
+
/* Unplug the PCI device */
if (pbdev->pdev) {
DeviceState *pdev = DEVICE(pbdev->pdev);
@@ -1111,6 +1133,12 @@ static void s390_pcihost_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
pbdev->fh |= FH_SHM_VFIO;
pbdev->forwarding_assist = false;
}
+ /* Register shutdown notifier and reset callback for ISM devices */
+ if (pbdev->pft == ZPCI_PFT_ISM) {
+ pbdev->shutdown_notifier.notify = s390_pci_shutdown_notifier;
+ qemu_register_shutdown_notifier(&pbdev->shutdown_notifier);
+ qemu_register_reset(s390_pci_reset_cb, pbdev);
+ }
} else {
pbdev->fh |= FH_SHM_EMUL;
/* Always intercept emulated devices */
diff --git a/hw/s390x/s390-pci-vfio.c b/hw/s390x/s390-pci-vfio.c
index 99806e2a84..69af35f4fe 100644
--- a/hw/s390x/s390-pci-vfio.c
+++ b/hw/s390x/s390-pci-vfio.c
@@ -124,6 +124,8 @@ static void s390_pci_read_base(S390PCIBusDevice *pbdev,
/* The following values remain 0 until we support other FMB formats */
pbdev->zpci_fn.fmbl = 0;
pbdev->zpci_fn.pft = 0;
+ /* Store function type separately for type-specific behavior */
+ pbdev->pft = cap->pft;
/*
* If appropriate, reduce the size of the supported DMA aperture reported
diff --git a/include/hw/s390x/s390-pci-bus.h b/include/hw/s390x/s390-pci-bus.h
index 1c46e3a269..e0a9f9385b 100644
--- a/include/hw/s390x/s390-pci-bus.h
+++ b/include/hw/s390x/s390-pci-bus.h
@@ -39,6 +39,9 @@
#define UID_CHECKING_ENABLED 0x01
#define ZPCI_DTSM 0x40
+/* zPCI Function Types */
+#define ZPCI_PFT_ISM 5
+
OBJECT_DECLARE_SIMPLE_TYPE(S390pciState, S390_PCI_HOST_BRIDGE)
OBJECT_DECLARE_SIMPLE_TYPE(S390PCIBus, S390_PCI_BUS)
OBJECT_DECLARE_SIMPLE_TYPE(S390PCIBusDevice, S390_PCI_DEVICE)
@@ -344,6 +347,7 @@ struct S390PCIBusDevice {
uint16_t noi;
uint16_t maxstbl;
uint8_t sum;
+ uint8_t pft;
S390PCIGroup *pci_group;
ClpRspQueryPci zpci_fn;
S390MsixInfo msix;
@@ -352,6 +356,7 @@ struct S390PCIBusDevice {
MemoryRegion msix_notify_mr;
IndAddr *summary_ind;
IndAddr *indicator;
+ Notifier shutdown_notifier;
bool pci_unplug_request_processed;
bool unplug_requested;
bool interp;
--
2.37.3

91
SOURCES/kvm-s390x-pci-shrink-DMA-aperture-to-be-bound-by-vfio-DM.patch Normal file
View File

@ -0,0 +1,91 @@
From a0b6c21b555566eb6bc38643269d14c82dfd0226 Mon Sep 17 00:00:00 2001
From: Matthew Rosato <mjrosato@linux.ibm.com>
Date: Fri, 28 Oct 2022 15:47:58 -0400
Subject: [PATCH 10/11] s390x/pci: shrink DMA aperture to be bound by vfio DMA
limit
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 250: s390x/pci: reset ISM passthrough devices on shutdown and system reset
RH-Bugzilla: 2163713
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [3/4] aa241dd250ad5e696b67c87dddc31ee5aaee9c0e
Currently, s390x-pci performs accounting against the vfio DMA
limit and triggers the guest to clean up mappings when the limit
is reached. Let's go a step further and also limit the size of
the supported DMA aperture reported to the guest based upon the
initial vfio DMA limit reported for the container (if less than
than the size reported by the firmware/host zPCI layer). This
avoids processing sections of the guest DMA table during global
refresh that, for common use cases, will never be used anway, and
makes exhausting the vfio DMA limit due to mismatch between guest
aperture size and host limit far less likely and more indicitive
of an error.
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Message-Id: <20221028194758.204007-4-mjrosato@linux.ibm.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit df202e3ff3fccb49868e08f20d0bda86cb953fbe)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
hw/s390x/s390-pci-vfio.c | 11 +++++++++++
include/hw/s390x/s390-pci-bus.h | 1 +
2 files changed, 12 insertions(+)
diff --git a/hw/s390x/s390-pci-vfio.c b/hw/s390x/s390-pci-vfio.c
index 2aefa508a0..99806e2a84 100644
--- a/hw/s390x/s390-pci-vfio.c
+++ b/hw/s390x/s390-pci-vfio.c
@@ -84,6 +84,7 @@ S390PCIDMACount *s390_pci_start_dma_count(S390pciState *s,
cnt->users = 1;
cnt->avail = avail;
QTAILQ_INSERT_TAIL(&s->zpci_dma_limit, cnt, link);
+ pbdev->iommu->max_dma_limit = avail;
return cnt;
}
@@ -103,6 +104,7 @@ static void s390_pci_read_base(S390PCIBusDevice *pbdev,
struct vfio_info_cap_header *hdr;
struct vfio_device_info_cap_zpci_base *cap;
VFIOPCIDevice *vpci = container_of(pbdev->pdev, VFIOPCIDevice, pdev);
+ uint64_t vfio_size;
hdr = vfio_get_device_info_cap(info, VFIO_DEVICE_INFO_CAP_ZPCI_BASE);
@@ -122,6 +124,15 @@ static void s390_pci_read_base(S390PCIBusDevice *pbdev,
/* The following values remain 0 until we support other FMB formats */
pbdev->zpci_fn.fmbl = 0;
pbdev->zpci_fn.pft = 0;
+
+ /*
+ * If appropriate, reduce the size of the supported DMA aperture reported
+ * to the guest based upon the vfio DMA limit.
+ */
+ vfio_size = pbdev->iommu->max_dma_limit << TARGET_PAGE_BITS;
+ if (vfio_size < (cap->end_dma - cap->start_dma + 1)) {
+ pbdev->zpci_fn.edma = cap->start_dma + vfio_size - 1;
+ }
}
static bool get_host_fh(S390PCIBusDevice *pbdev, struct vfio_device_info *info,
diff --git a/include/hw/s390x/s390-pci-bus.h b/include/hw/s390x/s390-pci-bus.h
index 0605fcea24..1c46e3a269 100644
--- a/include/hw/s390x/s390-pci-bus.h
+++ b/include/hw/s390x/s390-pci-bus.h
@@ -278,6 +278,7 @@ struct S390PCIIOMMU {
uint64_t g_iota;
uint64_t pba;
uint64_t pal;
+ uint64_t max_dma_limit;
GHashTable *iotlb;
S390PCIDMACount *dma_limit;
};
--
2.37.3

49
SOURCES/kvm-s390x-pci-use-a-reserved-ID-for-the-default-PCI-grou.patch Normal file
View File

@ -0,0 +1,49 @@
From 55294fc4a955491f1fd947e4d98bd6df832c88ba Mon Sep 17 00:00:00 2001
From: Matthew Rosato <mjrosato@linux.ibm.com>
Date: Fri, 3 Dec 2021 09:27:03 -0500
Subject: [PATCH 01/42] s390x/pci: use a reserved ID for the default PCI group
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [1/41] ad3ed38dec95acf0da04d7669fe772d798d039fc
The current default PCI group being used can technically collide with a
real group ID passed from a hostdev. Let's instead use a group ID that
comes from a special pool (0xF0-0xFF) that is architected to be reserved
for simulated devices.
Fixes: 28dc86a072 ("s390x/pci: use a PCI Group structure")
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Message-Id: <20211203142706.427279-2-mjrosato@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit b2892a2b9d45d25b909108ca633d19f9d8d673f5)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
include/hw/s390x/s390-pci-bus.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/hw/s390x/s390-pci-bus.h b/include/hw/s390x/s390-pci-bus.h
index aa891c178d..2727e7bdef 100644
--- a/include/hw/s390x/s390-pci-bus.h
+++ b/include/hw/s390x/s390-pci-bus.h
@@ -313,7 +313,7 @@ typedef struct ZpciFmb {
} ZpciFmb;
QEMU_BUILD_BUG_MSG(offsetof(ZpciFmb, fmt0) != 48, "padding in ZpciFmb");
-#define ZPCI_DEFAULT_FN_GRP 0x20
+#define ZPCI_DEFAULT_FN_GRP 0xFF
typedef struct S390PCIGroup {
ClpRspQueryPciGrp zpci_group;
int id;
--
2.37.3

59
SOURCES/kvm-s390x-pci-use-the-passthrough-measurement-update-int.patch Normal file
View File

@ -0,0 +1,59 @@
From c251a7a16e776072b9c7bbc4e61cfa4f52599b0a Mon Sep 17 00:00:00 2001
From: Matthew Rosato <mjrosato@linux.ibm.com>
Date: Fri, 3 Dec 2021 09:27:05 -0500
Subject: [PATCH 03/42] s390x/pci: use the passthrough measurement update
interval
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [3/41] bc31ea731fe64e51522f1202e65528311397b919
We may have gotten a measurement update interval from the underlying host
via vfio -- Use it to set the interval via which we update the function
measurement block.
Fixes: 28dc86a072 ("s390x/pci: use a PCI Group structure")
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Message-Id: <20211203142706.427279-4-mjrosato@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit cb6d6a3e6aa1226b67fd218953dcb3866c3a6845)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
hw/s390x/s390-pci-inst.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/hw/s390x/s390-pci-inst.c b/hw/s390x/s390-pci-inst.c
index 11b7f6bfa1..07bab85ce5 100644
--- a/hw/s390x/s390-pci-inst.c
+++ b/hw/s390x/s390-pci-inst.c
@@ -1046,7 +1046,7 @@ static void fmb_update(void *opaque)
sizeof(pbdev->fmb.last_update))) {
return;
}
- timer_mod(pbdev->fmb_timer, t + DEFAULT_MUI);
+ timer_mod(pbdev->fmb_timer, t + pbdev->pci_group->zpci_group.mui);
}
int mpcifc_service_call(S390CPU *cpu, uint8_t r1, uint64_t fiba, uint8_t ar,
@@ -1204,7 +1204,8 @@ int mpcifc_service_call(S390CPU *cpu, uint8_t r1, uint64_t fiba, uint8_t ar,
}
pbdev->fmb_addr = fmb_addr;
timer_mod(pbdev->fmb_timer,
- qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + DEFAULT_MUI);
+ qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +
+ pbdev->pci_group->zpci_group.mui);
break;
}
default:
--
2.37.3

445
SOURCES/kvm-s390x-pv-Add-dump-support.patch Normal file
View File

@ -0,0 +1,445 @@
From 86aeb4fd7ff9395afba574e422d83f990ce1f047 Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Mon, 17 Oct 2022 08:38:22 +0000
Subject: [PATCH 41/42] s390x: pv: Add dump support
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [41/41] 2731c2329276e76013e3b3df21e9743bc74edd2b
Sometimes dumping a guest from the outside is the only way to get the
data that is needed. This can be the case if a dumping mechanism like
KDUMP hasn't been configured or data needs to be fetched at a specific
point. Dumping a protected guest from the outside without help from
fw/hw doesn't yield sufficient data to be useful. Hence we now
introduce PV dump support.
The PV dump support works by integrating the firmware into the dump
process. New Ultravisor calls are used to initiate the dump process,
dump cpu data, dump memory state and lastly complete the dump process.
The UV calls are exposed by KVM via the new KVM_PV_DUMP command and
its subcommands. The guest's data is fully encrypted and can only be
decrypted by the entity that owns the customer communication key for
the dumped guest. Also dumping needs to be allowed via a flag in the
SE header.
On the QEMU side of things we store the PV dump data in the newly
introduced architecture ELF sections (storage state and completion
data) and the cpu notes (for cpu dump data).
Users can use the zgetdump tool to convert the encrypted QEMU dump to an
unencrypted one.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
Message-Id: <20221017083822.43118-11-frankja@linux.ibm.com>
(cherry picked from commit 113d8f4e95cf0450bea421263de6ec016c779ad0)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
dump/dump.c | 12 +-
include/sysemu/dump.h | 5 +
target/s390x/arch_dump.c | 262 +++++++++++++++++++++++++++++++++++----
3 files changed, 246 insertions(+), 33 deletions(-)
diff --git a/dump/dump.c b/dump/dump.c
index 4aa8fb64d2..5dee060b73 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -709,9 +709,9 @@ static void dump_begin(DumpState *s, Error **errp)
write_elf_notes(s, errp);
}
-static int64_t dump_filtered_memblock_size(GuestPhysBlock *block,
- int64_t filter_area_start,
- int64_t filter_area_length)
+int64_t dump_filtered_memblock_size(GuestPhysBlock *block,
+ int64_t filter_area_start,
+ int64_t filter_area_length)
{
int64_t size, left, right;
@@ -729,9 +729,9 @@ static int64_t dump_filtered_memblock_size(GuestPhysBlock *block,
return size;
}
-static int64_t dump_filtered_memblock_start(GuestPhysBlock *block,
- int64_t filter_area_start,
- int64_t filter_area_length)
+int64_t dump_filtered_memblock_start(GuestPhysBlock *block,
+ int64_t filter_area_start,
+ int64_t filter_area_length)
{
if (filter_area_length) {
/* return -1 if the block is not within filter area */
diff --git a/include/sysemu/dump.h b/include/sysemu/dump.h
index 38ccac7190..4ffed0b659 100644
--- a/include/sysemu/dump.h
+++ b/include/sysemu/dump.h
@@ -215,4 +215,9 @@ typedef struct DumpState {
uint16_t cpu_to_dump16(DumpState *s, uint16_t val);
uint32_t cpu_to_dump32(DumpState *s, uint32_t val);
uint64_t cpu_to_dump64(DumpState *s, uint64_t val);
+
+int64_t dump_filtered_memblock_size(GuestPhysBlock *block, int64_t filter_area_start,
+ int64_t filter_area_length);
+int64_t dump_filtered_memblock_start(GuestPhysBlock *block, int64_t filter_area_start,
+ int64_t filter_area_length);
#endif
diff --git a/target/s390x/arch_dump.c b/target/s390x/arch_dump.c
index f60a14920d..a2329141e8 100644
--- a/target/s390x/arch_dump.c
+++ b/target/s390x/arch_dump.c
@@ -12,11 +12,13 @@
*/
#include "qemu/osdep.h"
+#include "qemu/units.h"
#include "cpu.h"
#include "s390x-internal.h"
#include "elf.h"
#include "sysemu/dump.h"
-
+#include "hw/s390x/pv.h"
+#include "kvm/kvm_s390x.h"
struct S390xUserRegsStruct {
uint64_t psw[2];
@@ -76,9 +78,16 @@ typedef struct noteStruct {
uint64_t todcmp;
uint32_t todpreg;
uint64_t ctrs[16];
+ uint8_t dynamic[1]; /*
+ * Would be a flexible array member, if
+ * that was legal inside a union. Real
+ * size comes from PV info interface.
+ */
} contents;
} QEMU_PACKED Note;
+static bool pv_dump_initialized;
+
static void s390x_write_elf64_prstatus(Note *note, S390CPU *cpu, int id)
{
int i;
@@ -177,28 +186,39 @@ static void s390x_write_elf64_prefix(Note *note, S390CPU *cpu, int id)
note->contents.prefix = cpu_to_be32((uint32_t)(cpu->env.psa));
}
+static void s390x_write_elf64_pv(Note *note, S390CPU *cpu, int id)
+{
+ note->hdr.n_type = cpu_to_be32(NT_S390_PV_CPU_DATA);
+ if (!pv_dump_initialized) {
+ return;
+ }
+ kvm_s390_dump_cpu(cpu, &note->contents.dynamic);
+}
typedef struct NoteFuncDescStruct {
int contents_size;
+ uint64_t (*note_size_func)(void); /* NULL for non-dynamic sized contents */
void (*note_contents_func)(Note *note, S390CPU *cpu, int id);
+ bool pvonly;
} NoteFuncDesc;
static const NoteFuncDesc note_core[] = {
- {sizeof_field(Note, contents.prstatus), s390x_write_elf64_prstatus},
- {sizeof_field(Note, contents.fpregset), s390x_write_elf64_fpregset},
- { 0, NULL}
+ {sizeof_field(Note, contents.prstatus), NULL, s390x_write_elf64_prstatus, false},
+ {sizeof_field(Note, contents.fpregset), NULL, s390x_write_elf64_fpregset, false},
+ { 0, NULL, NULL, false}
};
static const NoteFuncDesc note_linux[] = {
- {sizeof_field(Note, contents.prefix), s390x_write_elf64_prefix},
- {sizeof_field(Note, contents.ctrs), s390x_write_elf64_ctrs},
- {sizeof_field(Note, contents.timer), s390x_write_elf64_timer},
- {sizeof_field(Note, contents.todcmp), s390x_write_elf64_todcmp},
- {sizeof_field(Note, contents.todpreg), s390x_write_elf64_todpreg},
- {sizeof_field(Note, contents.vregslo), s390x_write_elf64_vregslo},
- {sizeof_field(Note, contents.vregshi), s390x_write_elf64_vregshi},
- {sizeof_field(Note, contents.gscb), s390x_write_elf64_gscb},
- { 0, NULL}
+ {sizeof_field(Note, contents.prefix), NULL, s390x_write_elf64_prefix, false},
+ {sizeof_field(Note, contents.ctrs), NULL, s390x_write_elf64_ctrs, false},
+ {sizeof_field(Note, contents.timer), NULL, s390x_write_elf64_timer, false},
+ {sizeof_field(Note, contents.todcmp), NULL, s390x_write_elf64_todcmp, false},
+ {sizeof_field(Note, contents.todpreg), NULL, s390x_write_elf64_todpreg, false},
+ {sizeof_field(Note, contents.vregslo), NULL, s390x_write_elf64_vregslo, false},
+ {sizeof_field(Note, contents.vregshi), NULL, s390x_write_elf64_vregshi, false},
+ {sizeof_field(Note, contents.gscb), NULL, s390x_write_elf64_gscb, false},
+ {0, kvm_s390_pv_dmp_get_size_cpu, s390x_write_elf64_pv, true},
+ { 0, NULL, NULL, false}
};
static int s390x_write_elf64_notes(const char *note_name,
@@ -207,22 +227,41 @@ static int s390x_write_elf64_notes(const char *note_name,
DumpState *s,
const NoteFuncDesc *funcs)
{
- Note note;
+ Note note, *notep;
const NoteFuncDesc *nf;
- int note_size;
+ int note_size, content_size;
int ret = -1;
assert(strlen(note_name) < sizeof(note.name));
for (nf = funcs; nf->note_contents_func; nf++) {
- memset(&note, 0, sizeof(note));
- note.hdr.n_namesz = cpu_to_be32(strlen(note_name) + 1);
- note.hdr.n_descsz = cpu_to_be32(nf->contents_size);
- g_strlcpy(note.name, note_name, sizeof(note.name));
- (*nf->note_contents_func)(&note, cpu, id);
+ notep = &note;
+ if (nf->pvonly && !s390_is_pv()) {
+ continue;
+ }
+
+ content_size = nf->note_size_func ? nf->note_size_func() : nf->contents_size;
+ note_size = sizeof(note) - sizeof(notep->contents) + content_size;
+
+ /* Notes with dynamic sizes need to allocate a note */
+ if (nf->note_size_func) {
+ notep = g_malloc(note_size);
+ }
+
+ memset(notep, 0, sizeof(note));
- note_size = sizeof(note) - sizeof(note.contents) + nf->contents_size;
- ret = f(&note, note_size, s);
+ /* Setup note header data */
+ notep->hdr.n_descsz = cpu_to_be32(content_size);
+ notep->hdr.n_namesz = cpu_to_be32(strlen(note_name) + 1);
+ g_strlcpy(notep->name, note_name, sizeof(notep->name));
+
+ /* Get contents and write them out */
+ (*nf->note_contents_func)(notep, cpu, id);
+ ret = f(notep, note_size, s);
+
+ if (nf->note_size_func) {
+ g_free(notep);
+ }
if (ret < 0) {
return -1;
@@ -247,13 +286,179 @@ int s390_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
return s390x_write_elf64_notes("LINUX", f, cpu, cpuid, s, note_linux);
}
+/* PV dump section size functions */
+static uint64_t get_mem_state_size_from_len(uint64_t len)
+{
+ return (len / (MiB)) * kvm_s390_pv_dmp_get_size_mem_state();
+}
+
+static uint64_t get_size_mem_state(DumpState *s)
+{
+ return get_mem_state_size_from_len(s->total_size);
+}
+
+static uint64_t get_size_completion_data(DumpState *s)
+{
+ return kvm_s390_pv_dmp_get_size_completion_data();
+}
+
+/* PV dump section data functions*/
+static int get_data_completion(DumpState *s, uint8_t *buff)
+{
+ int rc;
+
+ if (!pv_dump_initialized) {
+ return 0;
+ }
+ rc = kvm_s390_dump_completion_data(buff);
+ if (!rc) {
+ pv_dump_initialized = false;
+ }
+ return rc;
+}
+
+static int get_mem_state(DumpState *s, uint8_t *buff)
+{
+ int64_t memblock_size, memblock_start;
+ GuestPhysBlock *block;
+ uint64_t off;
+ int rc;
+
+ QTAILQ_FOREACH(block, &s->guest_phys_blocks.head, next) {
+ memblock_start = dump_filtered_memblock_start(block, s->filter_area_begin,
+ s->filter_area_length);
+ if (memblock_start == -1) {
+ continue;
+ }
+
+ memblock_size = dump_filtered_memblock_size(block, s->filter_area_begin,
+ s->filter_area_length);
+
+ off = get_mem_state_size_from_len(block->target_start);
+
+ rc = kvm_s390_dump_mem_state(block->target_start,
+ get_mem_state_size_from_len(memblock_size),
+ buff + off);
+ if (rc) {
+ return rc;
+ }
+ }
+
+ return 0;
+}
+
+static struct sections {
+ uint64_t (*sections_size_func)(DumpState *s);
+ int (*sections_contents_func)(DumpState *s, uint8_t *buff);
+ char sctn_str[12];
+} sections[] = {
+ { get_size_mem_state, get_mem_state, "pv_mem_meta"},
+ { get_size_completion_data, get_data_completion, "pv_compl"},
+ {NULL , NULL, ""}
+};
+
+static uint64_t arch_sections_write_hdr(DumpState *s, uint8_t *buff)
+{
+ Elf64_Shdr *shdr = (void *)buff;
+ struct sections *sctn = sections;
+ uint64_t off = s->section_offset;
+
+ if (!pv_dump_initialized) {
+ return 0;
+ }
+
+ for (; sctn->sections_size_func; off += shdr->sh_size, sctn++, shdr++) {
+ memset(shdr, 0, sizeof(*shdr));
+ shdr->sh_type = SHT_PROGBITS;
+ shdr->sh_offset = off;
+ shdr->sh_size = sctn->sections_size_func(s);
+ shdr->sh_name = s->string_table_buf->len;
+ g_array_append_vals(s->string_table_buf, sctn->sctn_str, sizeof(sctn->sctn_str));
+ }
+
+ return (uintptr_t)shdr - (uintptr_t)buff;
+}
+
+
+/* Add arch specific number of sections and their respective sizes */
+static void arch_sections_add(DumpState *s)
+{
+ struct sections *sctn = sections;
+
+ /*
+ * We only do a PV dump if we are running a PV guest, KVM supports
+ * the dump API and we got valid dump length information.
+ */
+ if (!s390_is_pv() || !kvm_s390_get_protected_dump() ||
+ !kvm_s390_pv_info_basic_valid()) {
+ return;
+ }
+
+ /*
+ * Start the UV dump process by doing the initialize dump call via
+ * KVM as the proxy.
+ */
+ if (!kvm_s390_dump_init()) {
+ pv_dump_initialized = true;
+ } else {
+ /*
+ * Dump init failed, maybe the guest owner disabled dumping.
+ * We'll continue the non-PV dump process since this is no
+ * reason to crash qemu.
+ */
+ return;
+ }
+
+ for (; sctn->sections_size_func; sctn++) {
+ s->shdr_num += 1;
+ s->elf_section_data_size += sctn->sections_size_func(s);
+ }
+}
+
+/*
+ * After the PV dump has been initialized, the CPU data has been
+ * fetched and memory has been dumped, we need to grab the tweak data
+ * and the completion data.
+ */
+static int arch_sections_write(DumpState *s, uint8_t *buff)
+{
+ struct sections *sctn = sections;
+ int rc;
+
+ if (!pv_dump_initialized) {
+ return -EINVAL;
+ }
+
+ for (; sctn->sections_size_func; sctn++) {
+ rc = sctn->sections_contents_func(s, buff);
+ buff += sctn->sections_size_func(s);
+ if (rc) {
+ return rc;
+ }
+ }
+ return 0;
+}
+
int cpu_get_dump_info(ArchDumpInfo *info,
const struct GuestPhysBlockList *guest_phys_blocks)
{
info->d_machine = EM_S390;
info->d_endian = ELFDATA2MSB;
info->d_class = ELFCLASS64;
-
+ /*
+ * This is evaluated for each dump so we can freely switch
+ * between PV and non-PV.
+ */
+ if (s390_is_pv() && kvm_s390_get_protected_dump() &&
+ kvm_s390_pv_info_basic_valid()) {
+ info->arch_sections_add_fn = *arch_sections_add;
+ info->arch_sections_write_hdr_fn = *arch_sections_write_hdr;
+ info->arch_sections_write_fn = *arch_sections_write;
+ } else {
+ info->arch_sections_add_fn = NULL;
+ info->arch_sections_write_hdr_fn = NULL;
+ info->arch_sections_write_fn = NULL;
+ }
return 0;
}
@@ -261,7 +466,7 @@ ssize_t cpu_get_note_size(int class, int machine, int nr_cpus)
{
int name_size = 8; /* "LINUX" or "CORE" + pad */
size_t elf_note_size = 0;
- int note_head_size;
+ int note_head_size, content_size;
const NoteFuncDesc *nf;
assert(class == ELFCLASS64);
@@ -270,12 +475,15 @@ ssize_t cpu_get_note_size(int class, int machine, int nr_cpus)
note_head_size = sizeof(Elf64_Nhdr);
for (nf = note_core; nf->note_contents_func; nf++) {
- elf_note_size = elf_note_size + note_head_size + name_size +
- nf->contents_size;
+ elf_note_size = elf_note_size + note_head_size + name_size + nf->contents_size;
}
for (nf = note_linux; nf->note_contents_func; nf++) {
+ if (nf->pvonly && !s390_is_pv()) {
+ continue;
+ }
+ content_size = nf->contents_size ? nf->contents_size : nf->note_size_func();
elf_note_size = elf_note_size + note_head_size + name_size +
- nf->contents_size;
+ content_size;
}
return (elf_note_size) * nr_cpus;
--
2.37.3

55
SOURCES/kvm-s390x-s390-virtio-ccw-Switch-off-zPCI-enhancements-o.patch Normal file
View File

@ -0,0 +1,55 @@
From c7b14d3af7c73a3bf0c00911b85f202840d9b414 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= <clg@redhat.com>
Date: Mon, 7 Nov 2022 17:13:49 +0100
Subject: [PATCH 12/42] s390x/s390-virtio-ccw: Switch off zPCI enhancements on
older machines
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [12/41] 61e32bab6d68ee9abd6a0751944af82e002b05b4
zPCI enhancement features (interpretation and forward assist) were
recently introduced to improve performance on PCI passthrough devices.
To maintain the same behaviour on older Z machines, deactivate the
features with the associated properties.
Signed-off-by: Cédric Le Goater <clg@redhat.com>
Message-Id: <20221107161349.1032730-3-clg@kaod.org>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit d3d1a406127f7da482eafbdc871c120c2770bb91)
[ clg: applied zPCI restrictions to rhel8.5.0 machine and below ]
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
hw/s390x/s390-virtio-ccw.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index bec270598b..bd80e72cf8 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -1130,8 +1130,14 @@ static void ccw_machine_rhel850_instance_options(MachineState *machine)
static void ccw_machine_rhel850_class_options(MachineClass *mc)
{
+ static GlobalProperty compat[] = {
+ { TYPE_S390_PCI_DEVICE, "interpret", "off", },
+ { TYPE_S390_PCI_DEVICE, "forwarding-assist", "off", },
+ };
+
ccw_machine_rhel860_class_options(mc);
compat_props_add(mc->compat_props, hw_compat_rhel_8_5, hw_compat_rhel_8_5_len);
+ compat_props_add(mc->compat_props, compat, G_N_ELEMENTS(compat));
mc->smp_props.prefer_sockets = true;
}
DEFINE_CCW_MACHINE(rhel850, "rhel8.5.0", false);
--
2.37.3

70
SOURCES/kvm-s390x-tod-kvm-don-t-save-restore-the-TOD-in-PV-guest.patch Normal file
View File

@ -0,0 +1,70 @@
From 90fcfe4b07afc5299c5ee69fa663ca46b597fd4b Mon Sep 17 00:00:00 2001
From: Nico Boehr <nrb@linux.ibm.com>
Date: Wed, 12 Oct 2022 14:32:29 +0200
Subject: [PATCH] s390x/tod-kvm: don't save/restore the TOD in PV guests
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 244: s390x/tod-kvm: don't save/restore the TOD in PV guests
RH-Bugzilla: 2155448
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Commit: [1/1] 3cb3154dd7c1549c54cf8c0483b5f23b235f6db3
Under PV, the guest's TOD clock is under control of the ultravisor and the
hypervisor cannot change it.
With upcoming kernel changes[1], the Linux kernel will reject QEMU's
request to adjust the guest's clock in this case, so don't attempt to set
the clock.
This avoids the following warning message on save/restore of a PV guest:
warning: Unable to set KVM guest TOD clock: Operation not supported
[1] https://lore.kernel.org/all/20221011160712.928239-2-nrb@linux.ibm.com/
Fixes: c3347ed0d2ee ("s390x: protvirt: Support unpack facility")
Signed-off-by: Nico Boehr <nrb@linux.ibm.com>
Message-Id: <20221012123229.1196007-1-nrb@linux.ibm.com>
[thuth: Add curly braces]
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit 38621181ae3cbec62e3490fbc14f6ac01642d07a)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
hw/s390x/tod-kvm.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/hw/s390x/tod-kvm.c b/hw/s390x/tod-kvm.c
index ec855811ae..c804c979b5 100644
--- a/hw/s390x/tod-kvm.c
+++ b/hw/s390x/tod-kvm.c
@@ -13,6 +13,7 @@
#include "qemu/module.h"
#include "sysemu/runstate.h"
#include "hw/s390x/tod.h"
+#include "hw/s390x/pv.h"
#include "kvm/kvm_s390x.h"
static void kvm_s390_get_tod_raw(S390TOD *tod, Error **errp)
@@ -84,6 +85,14 @@ static void kvm_s390_tod_vm_state_change(void *opaque, bool running,
S390TODState *td = opaque;
Error *local_err = NULL;
+ /*
+ * Under PV, the clock is under ultravisor control, hence we cannot restore
+ * it on resume.
+ */
+ if (s390_is_pv()) {
+ return;
+ }
+
if (running && td->stopped) {
/* Set the old TOD when running the VM - start the TOD clock. */
kvm_s390_set_tod_raw(&td->base, &local_err);
--
2.37.3

176
SOURCES/kvm-scsi-protect-req-aiocb-with-AioContext-lock.patch Normal file
View File

@ -0,0 +1,176 @@
From df836ee4b4e2a69cca5042a3a9daf2c41dc2aa58 Mon Sep 17 00:00:00 2001
From: Stefan Hajnoczi <stefanha@redhat.com>
Date: Tue, 21 Feb 2023 16:22:16 -0500
Subject: [PATCH 11/13] scsi: protect req->aiocb with AioContext lock
RH-Author: Stefan Hajnoczi <stefanha@redhat.com>
RH-MergeRequest: 264: scsi: protect req->aiocb with AioContext lock
RH-Bugzilla: 2090990
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
RH-Commit: [1/3] e6a6d4109713e0fd6d6c515535c66196fea98688
If requests are being processed in the IOThread when a SCSIDevice is
unplugged, scsi_device_purge_requests() -> scsi_req_cancel_async() races
with I/O completion callbacks. Both threads load and store req->aiocb.
This can lead to assert(r->req.aiocb == NULL) failures and undefined
behavior.
Protect r->req.aiocb with the AioContext lock to prevent the race.
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20230221212218.1378734-2-stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit 7b7fc3d0102dafe8eb44802493036a526e921a71)
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
hw/scsi/scsi-disk.c | 23 ++++++++++++++++-------
hw/scsi/scsi-generic.c | 11 ++++++-----
2 files changed, 22 insertions(+), 12 deletions(-)
diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
index d4914178ea..179ce22c4a 100644
--- a/hw/scsi/scsi-disk.c
+++ b/hw/scsi/scsi-disk.c
@@ -270,9 +270,11 @@ static void scsi_aio_complete(void *opaque, int ret)
SCSIDiskReq *r = (SCSIDiskReq *)opaque;
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
+ aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
+
assert(r->req.aiocb != NULL);
r->req.aiocb = NULL;
- aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
+
if (scsi_disk_req_check_error(r, ret, true)) {
goto done;
}
@@ -354,10 +356,11 @@ static void scsi_dma_complete(void *opaque, int ret)
SCSIDiskReq *r = (SCSIDiskReq *)opaque;
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
+ aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
+
assert(r->req.aiocb != NULL);
r->req.aiocb = NULL;
- aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
if (ret < 0) {
block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct);
} else {
@@ -390,10 +393,11 @@ static void scsi_read_complete(void *opaque, int ret)
SCSIDiskReq *r = (SCSIDiskReq *)opaque;
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
+ aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
+
assert(r->req.aiocb != NULL);
r->req.aiocb = NULL;
- aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
if (ret < 0) {
block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct);
} else {
@@ -443,10 +447,11 @@ static void scsi_do_read_cb(void *opaque, int ret)
SCSIDiskReq *r = (SCSIDiskReq *)opaque;
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
+ aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
+
assert (r->req.aiocb != NULL);
r->req.aiocb = NULL;
- aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
if (ret < 0) {
block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct);
} else {
@@ -527,10 +532,11 @@ static void scsi_write_complete(void * opaque, int ret)
SCSIDiskReq *r = (SCSIDiskReq *)opaque;
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
+ aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
+
assert (r->req.aiocb != NULL);
r->req.aiocb = NULL;
- aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
if (ret < 0) {
block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct);
} else {
@@ -1659,10 +1665,11 @@ static void scsi_unmap_complete(void *opaque, int ret)
SCSIDiskReq *r = data->r;
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
+ aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
+
assert(r->req.aiocb != NULL);
r->req.aiocb = NULL;
- aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
if (scsi_disk_req_check_error(r, ret, true)) {
scsi_req_unref(&r->req);
g_free(data);
@@ -1738,9 +1745,11 @@ static void scsi_write_same_complete(void *opaque, int ret)
SCSIDiskReq *r = data->r;
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
+ aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
+
assert(r->req.aiocb != NULL);
r->req.aiocb = NULL;
- aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
+
if (scsi_disk_req_check_error(r, ret, true)) {
goto done;
}
diff --git a/hw/scsi/scsi-generic.c b/hw/scsi/scsi-generic.c
index 3742899839..a1a40df64b 100644
--- a/hw/scsi/scsi-generic.c
+++ b/hw/scsi/scsi-generic.c
@@ -111,10 +111,11 @@ static void scsi_command_complete(void *opaque, int ret)
SCSIGenericReq *r = (SCSIGenericReq *)opaque;
SCSIDevice *s = r->req.dev;
+ aio_context_acquire(blk_get_aio_context(s->conf.blk));
+
assert(r->req.aiocb != NULL);
r->req.aiocb = NULL;
- aio_context_acquire(blk_get_aio_context(s->conf.blk));
scsi_command_complete_noio(r, ret);
aio_context_release(blk_get_aio_context(s->conf.blk));
}
@@ -269,11 +270,11 @@ static void scsi_read_complete(void * opaque, int ret)
SCSIDevice *s = r->req.dev;
int len;
+ aio_context_acquire(blk_get_aio_context(s->conf.blk));
+
assert(r->req.aiocb != NULL);
r->req.aiocb = NULL;
- aio_context_acquire(blk_get_aio_context(s->conf.blk));
-
if (ret || r->req.io_canceled) {
scsi_command_complete_noio(r, ret);
goto done;
@@ -387,11 +388,11 @@ static void scsi_write_complete(void * opaque, int ret)
trace_scsi_generic_write_complete(ret);
+ aio_context_acquire(blk_get_aio_context(s->conf.blk));
+
assert(r->req.aiocb != NULL);
r->req.aiocb = NULL;
- aio_context_acquire(blk_get_aio_context(s->conf.blk));
-
if (ret || r->req.io_canceled) {
scsi_command_complete_noio(r, ret);
goto done;
--
2.37.3

65
SOURCES/kvm-target-arm-kvm-Retry-KVM_CREATE_VM-call-if-it-fails-.patch Normal file
View File

@ -0,0 +1,65 @@
From 3014c7c11b6e64433fe9f3c463bd91e318ac96b6 Mon Sep 17 00:00:00 2001
From: Jon Maloy <jmaloy@redhat.com>
Date: Wed, 9 Nov 2022 18:41:18 -0500
Subject: [PATCH 2/2] target/arm/kvm: Retry KVM_CREATE_VM call if it fails
EINTR
RH-Author: Jon Maloy <jmaloy@redhat.com>
RH-MergeRequest: 228: qemu-kvm: backport some aarch64 fixes
RH-Bugzilla: 2132609
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Igor Mammedov <imammedo@redhat.com>
RH-Acked-by: Eric Auger <eric.auger@redhat.com>
RH-Acked-by: Gavin Shan <gshan@redhat.com>
RH-Commit: [2/2] 8494bbfb3fcd8693f56312f984d2964d1ca275c2 (jmaloy/qemu-kvm)
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=2132609
Upstream: Merged
commit bbde13cd14ad4eec18529ce0bf5876058464e124
Author: Peter Maydell <peter.maydell@linaro.org>
Date: Fri Sep 30 12:38:24 2022 +0100
target/arm/kvm: Retry KVM_CREATE_VM call if it fails EINTR
Occasionally the KVM_CREATE_VM ioctl can return EINTR, even though
there is no pending signal to be taken. In commit 94ccff13382055
we added a retry-on-EINTR loop to the KVM_CREATE_VM call in the
generic KVM code. Adopt the same approach for the use of the
ioctl in the Arm-specific KVM code (where we use it to create a
scratch VM for probing for various things).
For more information, see the mailing list thread:
https://lore.kernel.org/qemu-devel/8735e0s1zw.wl-maz@kernel.org/
Reported-by: Vitaly Chikunov <vt@altlinux.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Vitaly Chikunov <vt@altlinux.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Message-id: 20220930113824.1933293-1-peter.maydell@linaro.org
(cherry picked from commit bbde13cd14ad4eec18529ce0bf5876058464e124)
Signed-off-by: Jon Maloy <jmaloy@redhat.com>
---
target/arm/kvm.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/target/arm/kvm.c b/target/arm/kvm.c
index bbf1ce7ba3..1ae4e51055 100644
--- a/target/arm/kvm.c
+++ b/target/arm/kvm.c
@@ -80,7 +80,9 @@ bool kvm_arm_create_scratch_host_vcpu(const uint32_t *cpus_to_try,
if (max_vm_pa_size < 0) {
max_vm_pa_size = 0;
}
- vmfd = ioctl(kvmfd, KVM_CREATE_VM, max_vm_pa_size);
+ do {
+ vmfd = ioctl(kvmfd, KVM_CREATE_VM, max_vm_pa_size);
+ } while (vmfd == -1 && errno == EINTR);
if (vmfd < 0) {
goto err;
}
--
2.37.3

50
SOURCES/kvm-target-s390x-arch_dump-Fix-memory-corruption-in-s390.patch Normal file
View File

@ -0,0 +1,50 @@
From e1870dec813fa6f8482f4f27b7a9bef8c1584b6b Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Tue, 14 Feb 2023 14:48:37 +0100
Subject: [PATCH 3/3] target/s390x/arch_dump: Fix memory corruption in
s390x_write_elf64_notes()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Thomas Huth <thuth@redhat.com>
RH-MergeRequest: 260: target/s390x/arch_dump: Fix memory corruption in s390x_write_elf64_notes()
RH-Bugzilla: 2168187
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Acked-by: Cédric Le Goater <clg@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Commit: [1/1] 67b71ed720a1f03d5bda9119969ea95fc4a6106d
Bugzilla: https://bugzilla.redhat.com/2168187
Upstream-Status: Posted (and reviewed, but not merged yet)
"note_size" can be smaller than sizeof(note), so unconditionally calling
memset(notep, 0, sizeof(note)) could cause a memory corruption here in
case notep has been allocated dynamically, thus let's use note_size as
length argument for memset() instead.
Fixes: 113d8f4e95 ("s390x: pv: Add dump support")
Message-Id: <20230214141056.680969-1-thuth@redhat.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
target/s390x/arch_dump.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/target/s390x/arch_dump.c b/target/s390x/arch_dump.c
index a2329141e8..a7c44ba49d 100644
--- a/target/s390x/arch_dump.c
+++ b/target/s390x/arch_dump.c
@@ -248,7 +248,7 @@ static int s390x_write_elf64_notes(const char *note_name,
notep = g_malloc(note_size);
}
- memset(notep, 0, sizeof(note));
+ memset(notep, 0, note_size);
/* Setup note header data */
notep->hdr.n_descsz = cpu_to_be32(content_size);
--
2.37.3

106
SOURCES/kvm-target-s390x-kvm-Honor-storage-keys-during-emulation.patch Normal file
View File

@ -0,0 +1,106 @@
From 8d1a60069cddcc69ef1a6f50f2b55343de348b57 Mon Sep 17 00:00:00 2001
From: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Date: Fri, 6 May 2022 17:39:56 +0200
Subject: [PATCH 2/3] target/s390x: kvm: Honor storage keys during emulation
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <None>
RH-MergeRequest: 220: s390x: Fix skey test in kvm_unit_test
RH-Bugzilla: 2124757
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Commit: [2/2] 980dbb4eba8d2f1da7cf4113230d0a6483cffc4f
Storage key controlled protection is currently not honored when
emulating instructions.
If available, enable key protection for the MEM_OP ioctl, thereby
enabling it for the s390_cpu_virt_mem_* functions, when using kvm.
As a result, the emulation of the following instructions honors storage
keys:
* CLP
The Synch I/O CLP command would need special handling in order
to support storage keys, but is currently not supported.
* CHSC
Performing commands asynchronously would require special
handling, but commands are currently always synchronous.
* STSI
* TSCH
Must (and does) not change channel if terminated due to
protection.
* MSCH
Suppressed on protection, works because fetching instruction.
* SSCH
Suppressed on protection, works because fetching instruction.
* STSCH
* STCRW
Suppressed on protection, this works because no partial store is
possible, because the operand cannot span multiple pages.
* PCISTB
* MPCIFC
* STPCIFC
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2124757
Signed-off-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Message-Id: <20220506153956.2217601-3-scgl@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit 54354861d21b69ec0781f43e67b8d4f6edad7e3f)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
target/s390x/kvm/kvm.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c
index c52434985b..ba04997da1 100644
--- a/target/s390x/kvm/kvm.c
+++ b/target/s390x/kvm/kvm.c
@@ -152,12 +152,15 @@ const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
static int cap_sync_regs;
static int cap_async_pf;
static int cap_mem_op;
+static int cap_mem_op_extension;
static int cap_s390_irq;
static int cap_ri;
static int cap_hpage_1m;
static int cap_vcpu_resets;
static int cap_protected;
+static bool mem_op_storage_key_support;
+
static int active_cmma;
static int kvm_s390_query_mem_limit(uint64_t *memory_limit)
@@ -355,6 +358,8 @@ int kvm_arch_init(MachineState *ms, KVMState *s)
cap_sync_regs = kvm_check_extension(s, KVM_CAP_SYNC_REGS);
cap_async_pf = kvm_check_extension(s, KVM_CAP_ASYNC_PF);
cap_mem_op = kvm_check_extension(s, KVM_CAP_S390_MEM_OP);
+ cap_mem_op_extension = kvm_check_extension(s, KVM_CAP_S390_MEM_OP_EXTENSION);
+ mem_op_storage_key_support = cap_mem_op_extension > 0;
cap_s390_irq = kvm_check_extension(s, KVM_CAP_S390_INJECT_IRQ);
cap_vcpu_resets = kvm_check_extension(s, KVM_CAP_S390_VCPU_RESETS);
cap_protected = kvm_check_extension(s, KVM_CAP_S390_PROTECTED);
@@ -843,6 +848,7 @@ int kvm_s390_mem_op(S390CPU *cpu, vaddr addr, uint8_t ar, void *hostbuf,
: KVM_S390_MEMOP_LOGICAL_READ,
.buf = (uint64_t)hostbuf,
.ar = ar,
+ .key = (cpu->env.psw.mask & PSW_MASK_KEY) >> PSW_SHIFT_KEY,
};
int ret;
@@ -852,6 +858,9 @@ int kvm_s390_mem_op(S390CPU *cpu, vaddr addr, uint8_t ar, void *hostbuf,
if (!hostbuf) {
mem_op.flags |= KVM_S390_MEMOP_F_CHECK_ONLY;
}
+ if (mem_op_storage_key_support) {
+ mem_op.flags |= KVM_S390_MEMOP_F_SKEY_PROTECTION;
+ }
ret = kvm_vcpu_ioctl(CPU(cpu), KVM_S390_MEM_OP, &mem_op);
if (ret < 0) {
--
2.35.3

80
SOURCES/kvm-ui-vnc-clipboard-fix-integer-underflow-in-vnc_client.patch Normal file
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@ -0,0 +1,80 @@
From d3602e5afa1e90c5e33625fc528db7f96195bada Mon Sep 17 00:00:00 2001
From: Jon Maloy <jmaloy@redhat.com>
Date: Mon, 7 Nov 2022 19:59:46 -0500
Subject: [PATCH 42/42] ui/vnc-clipboard: fix integer underflow in
vnc_client_cut_text_ext
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Jon Maloy <jmaloy@redhat.com>
RH-MergeRequest: 227: ui/vnc-clipboard: fix integer underflow in vnc_client_cut_text_ext
RH-Bugzilla: 2129760
RH-Acked-by: Mauro Matteo Cascella <None>
RH-Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Gerd Hoffmann <kraxel@redhat.com>
RH-Commit: [1/1] ac19a6c0777e308061bcb6d1de5cc9beaa105a3a (jmaloy/qemu-kvm)
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=2129760
CVE: CVE-2022-3165
Upstream: Merged
commit d307040b18bfcb1393b910f1bae753d5c12a4dc7
Author: Mauro Matteo Cascella <mcascell@redhat.com>
Date: Sun Sep 25 22:45:11 2022 +0200
ui/vnc-clipboard: fix integer underflow in vnc_client_cut_text_ext
Extended ClientCutText messages start with a 4-byte header. If len < 4,
an integer underflow occurs in vnc_client_cut_text_ext. The result is
used to decompress data in a while loop in inflate_buffer, leading to
CPU consumption and denial of service. Prevent this by checking dlen in
protocol_client_msg.
Fixes: CVE-2022-3165
Fixes: 0bf41cab93e5 ("ui/vnc: clipboard support")
Reported-by: TangPeng <tangpeng@qianxin.com>
Signed-off-by: Mauro Matteo Cascella <mcascell@redhat.com>
Message-Id: <20220925204511.1103214-1-mcascell@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit d307040b18bfcb1393b910f1bae753d5c12a4dc7)
Signed-off-by: Jon Maloy <jmaloy@redhat.com>
---
ui/vnc.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/ui/vnc.c b/ui/vnc.c
index af02522e84..a14b6861be 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -2442,8 +2442,8 @@ static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len)
if (len == 1) {
return 8;
}
+ uint32_t dlen = abs(read_s32(data, 4));
if (len == 8) {
- uint32_t dlen = abs(read_s32(data, 4));
if (dlen > (1 << 20)) {
error_report("vnc: client_cut_text msg payload has %u bytes"
" which exceeds our limit of 1MB.", dlen);
@@ -2456,8 +2456,13 @@ static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len)
}
if (read_s32(data, 4) < 0) {
- vnc_client_cut_text_ext(vs, abs(read_s32(data, 4)),
- read_u32(data, 8), data + 12);
+ if (dlen < 4) {
+ error_report("vnc: malformed payload (header less than 4 bytes)"
+ " in extended clipboard pseudo-encoding.");
+ vnc_client_error(vs);
+ break;
+ }
+ vnc_client_cut_text_ext(vs, dlen, read_u32(data, 8), data + 12);
break;
}
vnc_client_cut_text(vs, read_u32(data, 4), data + 8);
--
2.37.3

14
SOURCES/kvm-ui-vnc.c-Fixed-a-deadlock-bug.patch
View File

@ -1,20 +1,20 @@
From 05630592885c6c82ba83e197626e773b0d93d608 Mon Sep 17 00:00:00 2001
From ffdf44cb8b4c743e7ab0ce46d62687d7178f9a49 Mon Sep 17 00:00:00 2001
From: Jon Maloy <jmaloy@redhat.com>
Date: Fri, 18 Nov 2022 20:26:54 -0500
Subject: [PATCH 1/6] ui/vnc.c: Fixed a deadlock bug.
Subject: [PATCH 3/3] ui/vnc.c: Fixed a deadlock bug.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Jon Maloy <jmaloy@redhat.com>
RH-MergeRequest: 237: ui/vnc.c: Fixed a deadlock bug.
RH-Bugzilla: 2148504
RH-MergeRequest: 234: ui/vnc.c: Fixed a deadlock bug.
RH-Bugzilla: 2141896
RH-Acked-by: Gerd Hoffmann <kraxel@redhat.com>
RH-Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
RH-Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
RH-Commit: [1/1] 0be7fc3eaa5b41e806adaf75750fee75bb33a92f (jmaloy/jons-qemu-kvm)
RH-Commit: [1/1] d3d1d28d7b621a8ae8a593a5bd5303fa7951c17c (jmaloy/qemu-kvm)
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=2148504
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=2141896
Upstream: Merged
commit 1dbbe6f172810026c51dc84ed927a3cc23017949
@ -67,7 +67,7 @@ Signed-off-by: Jon Maloy <jmaloy@redhat.com>
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/ui/vnc.c b/ui/vnc.c
index af02522e84..b253e85c65 100644
index a14b6861be..76372ca1de 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -1354,12 +1354,12 @@ void vnc_disconnect_finish(VncState *vs)

102
SOURCES/kvm-virtio-fix-feature-negotiation-for-ACCESS_PLATFORM.patch Normal file
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@ -0,0 +1,102 @@
From 56e2aef97e750ffdc572dcecbfc31314728d37a9 Mon Sep 17 00:00:00 2001
From: Halil Pasic <pasic@linux.ibm.com>
Date: Mon, 7 Mar 2022 12:29:39 +0100
Subject: [PATCH 2/2] virtio: fix feature negotiation for ACCESS_PLATFORM
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Dr. David Alan Gilbert <dgilbert@redhat.com>
RH-MergeRequest: 224: virtiofs on s390 secure execution
RH-Bugzilla: 2116302
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Cédric Le Goater <None>
RH-Commit: [2/2] 264d3bdbbde985f16ed6f5a1786547c25fb8cc04
Unlike most virtio features ACCESS_PLATFORM is considered mandatory by
QEMU, i.e. the driver must accept it if offered by the device. The
virtio specification says that the driver SHOULD accept the
ACCESS_PLATFORM feature if offered, and that the device MAY fail to
operate if ACCESS_PLATFORM was offered but not negotiated.
While a SHOULD ain't exactly a MUST, we are certainly allowed to fail
the device when the driver fences ACCESS_PLATFORM. With commit
2943b53f68 ("virtio: force VIRTIO_F_IOMMU_PLATFORM") we already made the
decision to do so whenever the get_dma_as() callback is implemented (by
the bus), which in practice means for the entirety of virtio-pci.
That means, if the device needs to translate I/O addresses, then
ACCESS_PLATFORM is mandatory. The aforementioned commit tells us in the
commit message that this is for security reasons. More precisely if we
were to allow a less then trusted driver (e.g. an user-space driver, or
a nested guest) to make the device bypass the IOMMU by not negotiating
ACCESS_PLATFORM, then the guest kernel would have no ability to
control/police (by programming the IOMMU) what pieces of guest memory
the driver may manipulate using the device. Which would break security
assumptions within the guest.
If ACCESS_PLATFORM is offered not because we want the device to utilize
an IOMMU and do address translation, but because the device does not
have access to the entire guest RAM, and needs the driver to grant
access to the bits it needs access to (e.g. confidential guest support),
we still require the guest to have the corresponding logic and to accept
ACCESS_PLATFORM. If the driver does not accept ACCESS_PLATFORM, then
things are bound to go wrong, and we may see failures much less graceful
than failing the device because the driver didn't negotiate
ACCESS_PLATFORM.
So let us make ACCESS_PLATFORM mandatory for the driver regardless
of whether the get_dma_as() callback is implemented or not.
Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
Fixes: 2943b53f68 ("virtio: force VIRTIO_F_IOMMU_PLATFORM")
Message-Id: <20220307112939.2780117-1-pasic@linux.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
(cherry picked from commit 06134e2bc35dc21543d4cbcf31f858c03d383442)
---
hw/virtio/virtio-bus.c | 22 ++++++++++++++--------
1 file changed, 14 insertions(+), 8 deletions(-)
diff --git a/hw/virtio/virtio-bus.c b/hw/virtio/virtio-bus.c
index 0f69d1c742..d7ec023adf 100644
--- a/hw/virtio/virtio-bus.c
+++ b/hw/virtio/virtio-bus.c
@@ -78,17 +78,23 @@ void virtio_bus_device_plugged(VirtIODevice *vdev, Error **errp)
return;
}
- vdev_has_iommu = virtio_host_has_feature(vdev, VIRTIO_F_IOMMU_PLATFORM);
- if (klass->get_dma_as != NULL && has_iommu) {
+ vdev->dma_as = &address_space_memory;
+ if (has_iommu) {
+ vdev_has_iommu = virtio_host_has_feature(vdev, VIRTIO_F_IOMMU_PLATFORM);
+ /*
+ * Present IOMMU_PLATFORM to the driver iff iommu_plattform=on and
+ * device operational. If the driver does not accept IOMMU_PLATFORM
+ * we fail the device.
+ */
virtio_add_feature(&vdev->host_features, VIRTIO_F_IOMMU_PLATFORM);
- vdev->dma_as = klass->get_dma_as(qbus->parent);
- if (!vdev_has_iommu && vdev->dma_as != &address_space_memory) {
- error_setg(errp,
+ if (klass->get_dma_as) {
+ vdev->dma_as = klass->get_dma_as(qbus->parent);
+ if (!vdev_has_iommu && vdev->dma_as != &address_space_memory) {
+ error_setg(errp,
"iommu_platform=true is not supported by the device");
- return;
+ return;
+ }
}
- } else {
- vdev->dma_as = &address_space_memory;
}
}
--
2.37.3

115
SOURCES/kvm-virtio-fix-the-condition-for-iommu_platform-not-supp.patch Normal file
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@ -0,0 +1,115 @@
From c731ffdf9faee74e9522dff06e61cda817902088 Mon Sep 17 00:00:00 2001
From: Halil Pasic <pasic@linux.ibm.com>
Date: Mon, 7 Feb 2022 12:28:57 +0100
Subject: [PATCH 1/2] virtio: fix the condition for iommu_platform not
supported
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Dr. David Alan Gilbert <dgilbert@redhat.com>
RH-MergeRequest: 224: virtiofs on s390 secure execution
RH-Bugzilla: 2116302
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Cédric Le Goater <None>
RH-Commit: [1/2] d7edc7e3905a04644c9ff44b0d36122c72068e08
The commit 04ceb61a40 ("virtio: Fail if iommu_platform is requested, but
unsupported") claims to fail the device hotplug when iommu_platform
is requested, but not supported by the (vhost) device. On the first
glance the condition for detecting that situation looks perfect, but
because a certain peculiarity of virtio_platform it ain't.
In fact the aforementioned commit introduces a regression. It breaks
virtio-fs support for Secure Execution, and most likely also for AMD SEV
or any other confidential guest scenario that relies encrypted guest
memory. The same also applies to any other vhost device that does not
support _F_ACCESS_PLATFORM.
The peculiarity is that iommu_platform and _F_ACCESS_PLATFORM collates
"device can not access all of the guest RAM" and "iova != gpa, thus
device needs to translate iova".
Confidential guest technologies currently rely on the device/hypervisor
offering _F_ACCESS_PLATFORM, so that, after the feature has been
negotiated, the guest grants access to the portions of memory the
device needs to see. So in for confidential guests, generally,
_F_ACCESS_PLATFORM is about the restricted access to memory, but not
about the addresses used being something else than guest physical
addresses.
This is the very reason for which commit f7ef7e6e3b ("vhost: correctly
turn on VIRTIO_F_IOMMU_PLATFORM") fences _F_ACCESS_PLATFORM from the
vhost device that does not need it, because on the vhost interface it
only means "I/O address translation is needed".
This patch takes inspiration from f7ef7e6e3b ("vhost: correctly turn on
VIRTIO_F_IOMMU_PLATFORM"), and uses the same condition for detecting the
situation when _F_ACCESS_PLATFORM is requested, but no I/O translation
by the device, and thus no device capability is needed. In this
situation claiming that the device does not support iommu_plattform=on
is counter-productive. So let us stop doing that!
Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
Reported-by: Jakob Naucke <Jakob.Naucke@ibm.com>
Fixes: 04ceb61a40 ("virtio: Fail if iommu_platform is requested, but
unsupported")
Acked-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Tested-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: qemu-stable@nongnu.org
Message-Id: <20220207112857.607829-1-pasic@linux.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
(cherry picked from commit e65902a913bf31ba79a83a3bd3621108b85cf645)
---
hw/virtio/virtio-bus.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/hw/virtio/virtio-bus.c b/hw/virtio/virtio-bus.c
index d23db98c56..0f69d1c742 100644
--- a/hw/virtio/virtio-bus.c
+++ b/hw/virtio/virtio-bus.c
@@ -48,6 +48,7 @@ void virtio_bus_device_plugged(VirtIODevice *vdev, Error **errp)
VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(bus);
VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
bool has_iommu = virtio_host_has_feature(vdev, VIRTIO_F_IOMMU_PLATFORM);
+ bool vdev_has_iommu;
Error *local_err = NULL;
DPRINTF("%s: plug device.\n", qbus->name);
@@ -69,11 +70,6 @@ void virtio_bus_device_plugged(VirtIODevice *vdev, Error **errp)
return;
}
- if (has_iommu && !virtio_host_has_feature(vdev, VIRTIO_F_IOMMU_PLATFORM)) {
- error_setg(errp, "iommu_platform=true is not supported by the device");
- return;
- }
-
if (klass->device_plugged != NULL) {
klass->device_plugged(qbus->parent, &local_err);
}
@@ -82,9 +78,15 @@ void virtio_bus_device_plugged(VirtIODevice *vdev, Error **errp)
return;
}
+ vdev_has_iommu = virtio_host_has_feature(vdev, VIRTIO_F_IOMMU_PLATFORM);
if (klass->get_dma_as != NULL && has_iommu) {
virtio_add_feature(&vdev->host_features, VIRTIO_F_IOMMU_PLATFORM);
vdev->dma_as = klass->get_dma_as(qbus->parent);
+ if (!vdev_has_iommu && vdev->dma_as != &address_space_memory) {
+ error_setg(errp,
+ "iommu_platform=true is not supported by the device");
+ return;
+ }
} else {
vdev->dma_as = &address_space_memory;
}
--
2.37.3

337
SOURCES/kvm-virtio-scsi-reset-SCSI-devices-from-main-loop-thread.patch Normal file
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@ -0,0 +1,337 @@
From 31e9e3691789469b93a75d0221387bab3e526094 Mon Sep 17 00:00:00 2001
From: Stefan Hajnoczi <stefanha@redhat.com>
Date: Tue, 21 Feb 2023 16:22:18 -0500
Subject: [PATCH 13/13] virtio-scsi: reset SCSI devices from main loop thread
RH-Author: Stefan Hajnoczi <stefanha@redhat.com>
RH-MergeRequest: 264: scsi: protect req->aiocb with AioContext lock
RH-Bugzilla: 2090990
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
RH-Commit: [3/3] 30d7c2bd868efa6694992e75ace22fb48aef161b
When an IOThread is configured, the ctrl virtqueue is processed in the
IOThread. TMFs that reset SCSI devices are currently called directly
from the IOThread and trigger an assertion failure in blk_drain() from
the following call stack:
virtio_scsi_handle_ctrl_req -> virtio_scsi_do_tmf -> device_code_reset
-> scsi_disk_reset -> scsi_device_purge_requests -> blk_drain
../block/block-backend.c:1780: void blk_drain(BlockBackend *): Assertion `qemu_in_main_thread()' failed.
The blk_drain() function is not designed to be called from an IOThread
because it needs the Big QEMU Lock (BQL).
This patch defers TMFs that reset SCSI devices to a Bottom Half (BH)
that runs in the main loop thread under the BQL. This way it's safe to
call blk_drain() and the assertion failure is avoided.
Introduce s->tmf_bh_list for tracking TMF requests that have been
deferred to the BH. When the BH runs it will grab the entire list and
process all requests. Care must be taken to clear the list when the
virtio-scsi device is reset or unrealized. Otherwise deferred TMF
requests could execute later and lead to use-after-free or other
undefined behavior.
The s->resetting counter that's used by TMFs that reset SCSI devices is
accessed from multiple threads. This patch makes that explicit by using
atomic accessor functions. With this patch applied the counter is only
modified by the main loop thread under the BQL but can be read by any
thread.
Reported-by: Qing Wang <qinwang@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20230221212218.1378734-4-stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit be2c42b97c3a3a395b2f05bad1b6c7de20ecf2a5)
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Conflicts:
- hw/scsi/virtio-scsi.c
- VirtIOSCSIReq is defined in include/hw/virtio/virtio-scsi.h
downstream instead of hw/scsi/virtio-scsi.c because commit
3dc584abeef0 ("virtio-scsi: move request-related items from .h to
.c") is missing. Update the struct fields in virtio-scsi.h
downstream.
- Use qbus_reset_all() downstream instead of bus_cold_reset() because
commit 4a5fc890b1d3 ("scsi: Use device_cold_reset() and
bus_cold_reset()") is missing.
- Drop GLOBAL_STATE_CODE() because these macros don't exist
downstream. They are assertions/documentation and can be removed
without affecting the code.
---
hw/scsi/virtio-scsi.c | 155 +++++++++++++++++++++++++-------
include/hw/virtio/virtio-scsi.h | 21 +++--
2 files changed, 139 insertions(+), 37 deletions(-)
diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
index a35257c35a..ef19a9bcd0 100644
--- a/hw/scsi/virtio-scsi.c
+++ b/hw/scsi/virtio-scsi.c
@@ -256,6 +256,118 @@ static inline void virtio_scsi_ctx_check(VirtIOSCSI *s, SCSIDevice *d)
}
}
+static void virtio_scsi_do_one_tmf_bh(VirtIOSCSIReq *req)
+{
+ VirtIOSCSI *s = req->dev;
+ SCSIDevice *d = virtio_scsi_device_get(s, req->req.tmf.lun);
+ BusChild *kid;
+ int target;
+
+ switch (req->req.tmf.subtype) {
+ case VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET:
+ if (!d) {
+ req->resp.tmf.response = VIRTIO_SCSI_S_BAD_TARGET;
+ goto out;
+ }
+ if (d->lun != virtio_scsi_get_lun(req->req.tmf.lun)) {
+ req->resp.tmf.response = VIRTIO_SCSI_S_INCORRECT_LUN;
+ goto out;
+ }
+ qatomic_inc(&s->resetting);
+ qdev_reset_all(&d->qdev);
+ qatomic_dec(&s->resetting);
+ break;
+
+ case VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET:
+ target = req->req.tmf.lun[1];
+ qatomic_inc(&s->resetting);
+
+ rcu_read_lock();
+ QTAILQ_FOREACH_RCU(kid, &s->bus.qbus.children, sibling) {
+ SCSIDevice *d1 = SCSI_DEVICE(kid->child);
+ if (d1->channel == 0 && d1->id == target) {
+ qdev_reset_all(&d1->qdev);
+ }
+ }
+ rcu_read_unlock();
+
+ qatomic_dec(&s->resetting);
+ break;
+
+ default:
+ g_assert_not_reached();
+ break;
+ }
+
+out:
+ object_unref(OBJECT(d));
+
+ virtio_scsi_acquire(s);
+ virtio_scsi_complete_req(req);
+ virtio_scsi_release(s);
+}
+
+/* Some TMFs must be processed from the main loop thread */
+static void virtio_scsi_do_tmf_bh(void *opaque)
+{
+ VirtIOSCSI *s = opaque;
+ QTAILQ_HEAD(, VirtIOSCSIReq) reqs = QTAILQ_HEAD_INITIALIZER(reqs);
+ VirtIOSCSIReq *req;
+ VirtIOSCSIReq *tmp;
+
+ virtio_scsi_acquire(s);
+
+ QTAILQ_FOREACH_SAFE(req, &s->tmf_bh_list, next, tmp) {
+ QTAILQ_REMOVE(&s->tmf_bh_list, req, next);
+ QTAILQ_INSERT_TAIL(&reqs, req, next);
+ }
+
+ qemu_bh_delete(s->tmf_bh);
+ s->tmf_bh = NULL;
+
+ virtio_scsi_release(s);
+
+ QTAILQ_FOREACH_SAFE(req, &reqs, next, tmp) {
+ QTAILQ_REMOVE(&reqs, req, next);
+ virtio_scsi_do_one_tmf_bh(req);
+ }
+}
+
+static void virtio_scsi_reset_tmf_bh(VirtIOSCSI *s)
+{
+ VirtIOSCSIReq *req;
+ VirtIOSCSIReq *tmp;
+
+ virtio_scsi_acquire(s);
+
+ if (s->tmf_bh) {
+ qemu_bh_delete(s->tmf_bh);
+ s->tmf_bh = NULL;
+ }
+
+ QTAILQ_FOREACH_SAFE(req, &s->tmf_bh_list, next, tmp) {
+ QTAILQ_REMOVE(&s->tmf_bh_list, req, next);
+
+ /* SAM-6 6.3.2 Hard reset */
+ req->resp.tmf.response = VIRTIO_SCSI_S_TARGET_FAILURE;
+ virtio_scsi_complete_req(req);
+ }
+
+ virtio_scsi_release(s);
+}
+
+static void virtio_scsi_defer_tmf_to_bh(VirtIOSCSIReq *req)
+{
+ VirtIOSCSI *s = req->dev;
+
+ QTAILQ_INSERT_TAIL(&s->tmf_bh_list, req, next);
+
+ if (!s->tmf_bh) {
+ s->tmf_bh = qemu_bh_new(virtio_scsi_do_tmf_bh, s);
+ qemu_bh_schedule(s->tmf_bh);
+ }
+}
+
/* Return 0 if the request is ready to be completed and return to guest;
* -EINPROGRESS if the request is submitted and will be completed later, in the
* case of async cancellation. */
@@ -263,8 +375,6 @@ static int virtio_scsi_do_tmf(VirtIOSCSI *s, VirtIOSCSIReq *req)
{
SCSIDevice *d = virtio_scsi_device_get(s, req->req.tmf.lun);
SCSIRequest *r, *next;
- BusChild *kid;
- int target;
int ret = 0;
virtio_scsi_ctx_check(s, d);
@@ -321,15 +431,9 @@ static int virtio_scsi_do_tmf(VirtIOSCSI *s, VirtIOSCSIReq *req)
break;
case VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET:
- if (!d) {
- goto fail;
- }
- if (d->lun != virtio_scsi_get_lun(req->req.tmf.lun)) {
- goto incorrect_lun;
- }
- s->resetting++;
- qdev_reset_all(&d->qdev);
- s->resetting--;
+ case VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET:
+ virtio_scsi_defer_tmf_to_bh(req);
+ ret = -EINPROGRESS;
break;
case VIRTIO_SCSI_T_TMF_ABORT_TASK_SET:
@@ -372,22 +476,6 @@ static int virtio_scsi_do_tmf(VirtIOSCSI *s, VirtIOSCSIReq *req)
}
break;
- case VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET:
- target = req->req.tmf.lun[1];
- s->resetting++;
-
- rcu_read_lock();
- QTAILQ_FOREACH_RCU(kid, &s->bus.qbus.children, sibling) {
- SCSIDevice *d1 = SCSI_DEVICE(kid->child);
- if (d1->channel == 0 && d1->id == target) {
- qdev_reset_all(&d1->qdev);
- }
- }
- rcu_read_unlock();
-
- s->resetting--;
- break;
-
case VIRTIO_SCSI_T_TMF_CLEAR_ACA:
default:
req->resp.tmf.response = VIRTIO_SCSI_S_FUNCTION_REJECTED;
@@ -603,7 +691,7 @@ static void virtio_scsi_request_cancelled(SCSIRequest *r)
if (!req) {
return;
}
- if (req->dev->resetting) {
+ if (qatomic_read(&req->dev->resetting)) {
req->resp.cmd.response = VIRTIO_SCSI_S_RESET;
} else {
req->resp.cmd.response = VIRTIO_SCSI_S_ABORTED;
@@ -784,9 +872,12 @@ static void virtio_scsi_reset(VirtIODevice *vdev)
VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
assert(!s->dataplane_started);
- s->resetting++;
+
+ virtio_scsi_reset_tmf_bh(s);
+
+ qatomic_inc(&s->resetting);
qbus_reset_all(BUS(&s->bus));
- s->resetting--;
+ qatomic_dec(&s->resetting);
vs->sense_size = VIRTIO_SCSI_SENSE_DEFAULT_SIZE;
vs->cdb_size = VIRTIO_SCSI_CDB_DEFAULT_SIZE;
@@ -1018,6 +1109,8 @@ static void virtio_scsi_device_realize(DeviceState *dev, Error **errp)
VirtIOSCSI *s = VIRTIO_SCSI(dev);
Error *err = NULL;
+ QTAILQ_INIT(&s->tmf_bh_list);
+
virtio_scsi_common_realize(dev,
virtio_scsi_handle_ctrl,
virtio_scsi_handle_event,
@@ -1055,6 +1148,8 @@ static void virtio_scsi_device_unrealize(DeviceState *dev)
{
VirtIOSCSI *s = VIRTIO_SCSI(dev);
+ virtio_scsi_reset_tmf_bh(s);
+
qbus_set_hotplug_handler(BUS(&s->bus), NULL);
virtio_scsi_common_unrealize(dev);
}
diff --git a/include/hw/virtio/virtio-scsi.h b/include/hw/virtio/virtio-scsi.h
index 543681bc18..b0e36f25aa 100644
--- a/include/hw/virtio/virtio-scsi.h
+++ b/include/hw/virtio/virtio-scsi.h
@@ -77,13 +77,22 @@ struct VirtIOSCSICommon {
VirtQueue **cmd_vqs;
};
+struct VirtIOSCSIReq;
+
struct VirtIOSCSI {
VirtIOSCSICommon parent_obj;
SCSIBus bus;
- int resetting;
+ int resetting; /* written from main loop thread, read from any thread */
bool events_dropped;
+ /*
+ * TMFs deferred to main loop BH. These fields are protected by
+ * virtio_scsi_acquire().
+ */
+ QEMUBH *tmf_bh;
+ QTAILQ_HEAD(, VirtIOSCSIReq) tmf_bh_list;
+
/* Fields for dataplane below */
AioContext *ctx; /* one iothread per virtio-scsi-pci for now */
@@ -106,13 +115,11 @@ typedef struct VirtIOSCSIReq {
QEMUSGList qsgl;
QEMUIOVector resp_iov;
- union {
- /* Used for two-stage request submission */
- QTAILQ_ENTRY(VirtIOSCSIReq) next;
+ /* Used for two-stage request submission and TMFs deferred to BH */
+ QTAILQ_ENTRY(VirtIOSCSIReq) next;
- /* Used for cancellation of request during TMFs */
- int remaining;
- };
+ /* Used for cancellation of request during TMFs */
+ int remaining;
SCSIRequest *sreq;
size_t resp_size;
--
2.37.3

22
SOURCES/kvm-virtiofsd-use-g_date_time_get_microsecond-to-get-sub.patch
View File

@ -1,15 +1,19 @@
From c4cc9d30f656acb7fcdc4d3a4b4a9bb0a34aaf7d Mon Sep 17 00:00:00 2001
From ebf6be5ba316ffda354af5eb1f1241ad6543b3cd Mon Sep 17 00:00:00 2001
From: Yusuke Okada <okada.yusuke@jp.fujitsu.com>
Date: Thu, 18 Aug 2022 14:46:19 -0400
Subject: [PATCH] virtiofsd: use g_date_time_get_microsecond to get subsecond
Subject: [PATCH 3/3] virtiofsd: use g_date_time_get_microsecond to get
subsecond
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Dr. David Alan Gilbert <dgilbert@redhat.com>
RH-MergeRequest: 223: 8.7.z: virtiofsd: use g_date_time_get_microsecond to get subsecond
RH-Bugzilla: 2132391
RH-Acked-by: German Maglione <None>
RH-Acked-by: Jano Tomko <None>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Commit: [1/1] bf1fe2785996ee9799ae23cc117598517749336c
RH-MergeRequest: 222: virtiofsd: use g_date_time_get_microsecond to get subsecond
RH-Bugzilla: 2018885
RH-Acked-by: Vivek Goyal <None>
RH-Acked-by: Daniel P. Berrangé <berrange@redhat.com>
RH-Acked-by: Sergio Lopez <slp@redhat.com>
RH-Commit: [1/1] da8795576acc7029044a801ef42676d66471a577
The "%f" specifier in g_date_time_format() is only available in glib
2.65.2 or later. If combined with older glib, the function returns null
@ -57,5 +61,5 @@ index b3d0674f6d..523d8fbe1e 100644
fmt = localfmt;
}
--
2.31.1
2.35.3

427
SPECS/qemu-kvm.spec
View File

@ -83,7 +83,7 @@ Obsoletes: %1-rhev <= %{epoch}:%{version}-%{release}
Summary: QEMU is a machine emulator and virtualizer
Name: qemu-kvm
Version: 6.2.0
Release: 22%{?rcrel}%{?dist}.2
Release: 32%{?rcrel}%{?dist}
# Epoch because we pushed a qemu-1.0 package. AIUI this can't ever be dropped
Epoch: 15
License: GPLv2 and GPLv2+ and CC-BY
@ -427,26 +427,231 @@ Patch163: kvm-QIOChannelSocket-Add-support-for-MSG_ZEROCOPY-IPV6.patch
Patch164: kvm-pc-bios-s390-ccw-Fix-booting-with-logical-block-size.patch
# For bz#2120279 - Wrong max_sectors_kb and Maximum transfer length on the pass-through device [rhel-8.7]
Patch165: kvm-scsi-generic-Fix-emulated-block-limits-VPD-page.patch
# For bz#2116743 - [RHEL8.7] Guests in VMX root operation fail to reboot with QEMU's 'system_reset' command
Patch166: kvm-i386-reset-KVM-nested-state-upon-CPU-reset.patch
# For bz#2116743 - [RHEL8.7] Guests in VMX root operation fail to reboot with QEMU's 'system_reset' command
Patch167: kvm-i386-do-kvm_put_msr_feature_control-first-thing-when.patch
# For bz#2132391 - [virtiofs] virtiofsd debug log's timestamp is NULL [rhel-8.7.0.z]
Patch168: kvm-virtiofsd-use-g_date_time_get_microsecond-to-get-sub.patch
# For bz#2148504 - VMs hung on vnc_clipboard_send [rhel-8.7.0.z]
Patch169: kvm-ui-vnc.c-Fixed-a-deadlock-bug.patch
# For bz#2152085 - CVE-2022-4144 virt:rhel/qemu-kvm: QEMU: QXL: qxl_phys2virt unsafe address translation can lead to out-of-bounds read [rhel-8] [rhel-8.7.0.z]
Patch170: kvm-hw-display-qxl-Have-qxl_log_command-Return-early-if-.patch
# For bz#2152085 - CVE-2022-4144 virt:rhel/qemu-kvm: QEMU: QXL: qxl_phys2virt unsafe address translation can lead to out-of-bounds read [rhel-8] [rhel-8.7.0.z]
Patch171: kvm-hw-display-qxl-Document-qxl_phys2virt.patch
# For bz#2152085 - CVE-2022-4144 virt:rhel/qemu-kvm: QEMU: QXL: qxl_phys2virt unsafe address translation can lead to out-of-bounds read [rhel-8] [rhel-8.7.0.z]
Patch172: kvm-hw-display-qxl-Pass-requested-buffer-size-to-qxl_phy.patch
# For bz#2152085 - CVE-2022-4144 virt:rhel/qemu-kvm: QEMU: QXL: qxl_phys2virt unsafe address translation can lead to out-of-bounds read [rhel-8] [rhel-8.7.0.z]
Patch173: kvm-hw-display-qxl-Avoid-buffer-overrun-in-qxl_phys2virt.patch
# For bz#2152085 - CVE-2022-4144 virt:rhel/qemu-kvm: QEMU: QXL: qxl_phys2virt unsafe address translation can lead to out-of-bounds read [rhel-8] [rhel-8.7.0.z]
Patch174: kvm-hw-display-qxl-Assert-memory-slot-fits-in-preallocat.patch
# For bz#2168217 - while live-migrating many instances concurrently, libvirt sometimes return internal error: migration was active, but no RAM info was set [rhel-8.7.0.z]
Patch175: kvm-migration-Read-state-once.patch
# For bz#2117149 - Can't run when memory backing with hugepages and backend type memfd
Patch166: kvm-backends-hostmem-Fix-support-of-memory-backend-memfd.patch
# For bz#2125271 - [RHEL8.7] Guests in VMX root operation fail to reboot with QEMU's 'system_reset' command [rhel-8.8.0]
Patch167: kvm-i386-reset-KVM-nested-state-upon-CPU-reset.patch
# For bz#2125271 - [RHEL8.7] Guests in VMX root operation fail to reboot with QEMU's 'system_reset' command [rhel-8.8.0]
Patch168: kvm-i386-do-kvm_put_msr_feature_control-first-thing-when.patch
# For bz#2124757 - RHEL8: skey test in kvm_unit_test got failed
Patch169: kvm-redhat-Update-linux-headers-linux-kvm.h-to-v5.18-rc6.patch
# For bz#2124757 - RHEL8: skey test in kvm_unit_test got failed
Patch170: kvm-target-s390x-kvm-Honor-storage-keys-during-emulation.patch
# For bz#2018885 - [virtiofs] virtiofsd debug log's timestamp is NULL
Patch171: kvm-virtiofsd-use-g_date_time_get_microsecond-to-get-sub.patch
# For bz#2116302 - RHEL8.6 - virtiofs will not mount fs on secure execution guest
Patch172: kvm-virtio-fix-the-condition-for-iommu_platform-not-supp.patch
# For bz#2116302 - RHEL8.6 - virtiofs will not mount fs on secure execution guest
Patch173: kvm-virtio-fix-feature-negotiation-for-ACCESS_PLATFORM.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch174: kvm-s390x-pci-use-a-reserved-ID-for-the-default-PCI-grou.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch175: kvm-s390x-pci-don-t-use-hard-coded-dma-range-in-reg_ioat.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch176: kvm-s390x-pci-use-the-passthrough-measurement-update-int.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch177: kvm-s390x-pci-add-supported-DT-information-to-clp-respon.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch178: kvm-Update-linux-headers-to-v6.0-rc4.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch179: kvm-s390x-pci-add-routine-to-get-host-function-handle-fr.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch180: kvm-s390x-pci-enable-for-load-store-interpretation.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch181: kvm-s390x-pci-don-t-fence-interpreted-devices-without-MS.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch182: kvm-s390x-pci-enable-adapter-event-notification-for-inte.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch183: kvm-s390x-pci-let-intercept-devices-have-separate-PCI-gr.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch184: kvm-s390x-pci-reflect-proper-maxstbl-for-groups-of-inter.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch185: kvm-s390x-s390-virtio-ccw-Switch-off-zPCI-enhancements-o.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch186: kvm-dump-Use-ERRP_GUARD.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch187: kvm-dump-Remove-the-sh_info-variable.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch188: kvm-dump-Introduce-shdr_num-to-decrease-complexity.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch189: kvm-dump-Remove-the-section-if-when-calculating-the-memo.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch190: kvm-dump-Add-more-offset-variables.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch191: kvm-dump-Introduce-dump_is_64bit-helper-function.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch192: kvm-dump-Consolidate-phdr-note-writes.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch193: kvm-dump-Cleanup-dump_begin-write-functions.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch194: kvm-dump-Consolidate-elf-note-function.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch195: kvm-dump-Replace-opaque-DumpState-pointer-with-a-typed-o.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch196: kvm-dump-Rename-write_elf_loads-to-write_elf_phdr_loads.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch197: kvm-dump-Refactor-dump_iterate-and-introduce-dump_filter.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch198: kvm-dump-Rework-get_start_block.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch199: kvm-dump-Rework-filter-area-variables.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch200: kvm-dump-Rework-dump_calculate_size-function.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch201: kvm-dump-Split-elf-header-functions-into-prepare-and-wri.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch202: kvm-dump-Rename-write_elf-_phdr_note-to-prepare_elf-_phd.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch203: kvm-dump-simplify-a-bit-kdump-get_next_page.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch204: kvm-dump-fix-kdump-to-work-over-non-aligned-blocks.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch205: kvm-dump-Use-a-buffer-for-ELF-section-data-and-headers.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch206: kvm-dump-Write-ELF-section-headers-right-after-ELF-heade.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch207: kvm-dump-Reorder-struct-DumpState.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch208: kvm-dump-Reintroduce-memory_offset-and-section_offset.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch209: kvm-dump-Add-architecture-section-and-section-string-tab.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch210: kvm-s390x-Add-protected-dump-cap.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch211: kvm-s390x-Introduce-PV-query-interface.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch212: kvm-include-elf.h-add-s390x-note-types.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch213: kvm-s390x-Add-KVM-PV-dump-interface.patch
# For bz#1664378 - [IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part
# For bz#2043909 - [IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part
Patch214: kvm-s390x-pv-Add-dump-support.patch
# For bz#2129760 - CVE-2022-3165 virt:rhel/qemu-kvm: QEMU: VNC: integer underflow in vnc_client_cut_text_ext leads to CPU exhaustion [rhel-8]
Patch215: kvm-ui-vnc-clipboard-fix-integer-underflow-in-vnc_client.patch
# For bz#2132609 - qemu-kvm: backport some aarch64 fixes
Patch216: kvm-hw-acpi-Add-ospm_status-hook-implementation-for-acpi.patch
# For bz#2132609 - qemu-kvm: backport some aarch64 fixes
Patch217: kvm-target-arm-kvm-Retry-KVM_CREATE_VM-call-if-it-fails-.patch
# For bz#2128225 - [s390x] [RHEL8][s390x-ccw bios] lacking document about parameter loadparm in qemu
Patch218: kvm-docs-system-s390x-Document-the-loadparm-machine-prop.patch
# For bz#2128225 - [s390x] [RHEL8][s390x-ccw bios] lacking document about parameter loadparm in qemu
Patch219: kvm-s390x-Register-TYPE_S390_CCW_MACHINE-properties-as-c.patch
# For bz#2141896 - VMs hung on vnc_clipboard_send
Patch220: kvm-ui-vnc.c-Fixed-a-deadlock-bug.patch
# For bz#2148545 - CVE-2022-4144 virt:rhel/qemu-kvm: QEMU: QXL: qxl_phys2virt unsafe address translation can lead to out-of-bounds read [rhel-8]
Patch221: kvm-hw-display-qxl-Have-qxl_log_command-Return-early-if-.patch
# For bz#2148545 - CVE-2022-4144 virt:rhel/qemu-kvm: QEMU: QXL: qxl_phys2virt unsafe address translation can lead to out-of-bounds read [rhel-8]
Patch222: kvm-hw-display-qxl-Document-qxl_phys2virt.patch
# For bz#2148545 - CVE-2022-4144 virt:rhel/qemu-kvm: QEMU: QXL: qxl_phys2virt unsafe address translation can lead to out-of-bounds read [rhel-8]
Patch223: kvm-hw-display-qxl-Pass-requested-buffer-size-to-qxl_phy.patch
# For bz#2148545 - CVE-2022-4144 virt:rhel/qemu-kvm: QEMU: QXL: qxl_phys2virt unsafe address translation can lead to out-of-bounds read [rhel-8]
Patch224: kvm-hw-display-qxl-Avoid-buffer-overrun-in-qxl_phys2virt.patch
# For bz#2148545 - CVE-2022-4144 virt:rhel/qemu-kvm: QEMU: QXL: qxl_phys2virt unsafe address translation can lead to out-of-bounds read [rhel-8]
Patch225: kvm-hw-display-qxl-Assert-memory-slot-fits-in-preallocat.patch
# For bz#2155448 - RHEL8.8 - KVM: s390: pv: don't allow userspace to set the clock under PV - QEMU part
Patch226: kvm-s390x-tod-kvm-don-t-save-restore-the-TOD-in-PV-guest.patch
# For bz#2125119 - Mirror job with "copy-mode":"write-blocking" that used for storage migration can't converge under heavy I/O
Patch227: kvm-block-mirror-Do-not-wait-for-active-writes.patch
# For bz#2125119 - Mirror job with "copy-mode":"write-blocking" that used for storage migration can't converge under heavy I/O
Patch228: kvm-block-mirror-Drop-mirror_wait_for_any_operation.patch
# For bz#2125119 - Mirror job with "copy-mode":"write-blocking" that used for storage migration can't converge under heavy I/O
Patch229: kvm-block-mirror-Fix-NULL-s-job-in-active-writes.patch
# For bz#2161188 - SVM: non atomic memslot updates cause boot failure with seabios and cpu-pm=on
Patch230: kvm-accel-introduce-accelerator-blocker-API.patch
# For bz#2161188 - SVM: non atomic memslot updates cause boot failure with seabios and cpu-pm=on
Patch231: kvm-KVM-keep-track-of-running-ioctls.patch
# For bz#2161188 - SVM: non atomic memslot updates cause boot failure with seabios and cpu-pm=on
Patch232: kvm-kvm-Atomic-memslot-updates.patch
# For bz#2074205 - while live-migrating many instances concurrently, libvirt sometimes return internal error: migration was active, but no RAM info was set
Patch233: kvm-migration-Read-state-once.patch
# For bz#2163713 - [s390x] VM fails to start with ISM passed through
Patch234: kvm-s390x-pci-RPCIT-second-pass-when-mappings-exhausted.patch
# For bz#2163713 - [s390x] VM fails to start with ISM passed through
Patch235: kvm-s390x-pci-coalesce-unmap-operations.patch
# For bz#2163713 - [s390x] VM fails to start with ISM passed through
Patch236: kvm-s390x-pci-shrink-DMA-aperture-to-be-bound-by-vfio-DM.patch
# For bz#2163713 - [s390x] VM fails to start with ISM passed through
Patch237: kvm-s390x-pci-reset-ISM-passthrough-devices-on-shutdown-.patch
# For bz#2147617 - qemu-img finishes successfully while having errors in commit or bitmaps operations
Patch238: kvm-qcow2-Fix-theoretical-corruption-in-store_bitmap-err.patch
# For bz#2147617 - qemu-img finishes successfully while having errors in commit or bitmaps operations
Patch239: kvm-qemu-img-commit-Report-errors-while-closing-the-imag.patch
# For bz#2147617 - qemu-img finishes successfully while having errors in commit or bitmaps operations
Patch240: kvm-qemu-img-bitmap-Report-errors-while-closing-the-imag.patch
# For bz#2147617 - qemu-img finishes successfully while having errors in commit or bitmaps operations
Patch241: kvm-qemu-iotests-Test-qemu-img-bitmap-commit-exit-code-o.patch
# For bz#2137740 - Multifd migration fails under a weak network/socket ordering race
Patch242: kvm-io-Add-support-for-MSG_PEEK-for-socket-channel.patch
# For bz#2137740 - Multifd migration fails under a weak network/socket ordering race
Patch243: kvm-migration-check-magic-value-for-deciding-the-mapping.patch
# For bz#2168187 - [s390x] qemu-kvm coredumps when SE crashes
Patch244: kvm-target-s390x-arch_dump-Fix-memory-corruption-in-s390.patch
# For bz#2168472 - Guest hangs when starting or rebooting
Patch245: kvm-aio_wait_kick-add-missing-memory-barrier.patch
# For bz#2168472 - Guest hangs when starting or rebooting
Patch246: kvm-qatomic-add-smp_mb__before-after_rmw.patch
# For bz#2168472 - Guest hangs when starting or rebooting
Patch247: kvm-qemu-thread-posix-cleanup-fix-document-QemuEvent.patch
# For bz#2168472 - Guest hangs when starting or rebooting
Patch248: kvm-qemu-thread-win32-cleanup-fix-document-QemuEvent.patch
# For bz#2168472 - Guest hangs when starting or rebooting
Patch249: kvm-edu-add-smp_mb__after_rmw.patch
# For bz#2168472 - Guest hangs when starting or rebooting
Patch250: kvm-aio-wait-switch-to-smp_mb__after_rmw.patch
# For bz#2168472 - Guest hangs when starting or rebooting
Patch251: kvm-qemu-coroutine-lock-add-smp_mb__after_rmw.patch
# For bz#2168472 - Guest hangs when starting or rebooting
Patch252: kvm-physmem-add-missing-memory-barrier.patch
# For bz#2168472 - Guest hangs when starting or rebooting
Patch253: kvm-async-update-documentation-of-the-memory-barriers.patch
# For bz#2168472 - Guest hangs when starting or rebooting
Patch254: kvm-async-clarify-usage-of-barriers-in-the-polling-case.patch
# For bz#2090990 - qemu crash with error scsi_req_unref(SCSIRequest *): Assertion `req->refcount > 0' failed or scsi_dma_complete(void *, int): Assertion `r->req.aiocb != NULL' failed [8.7.0]
Patch255: kvm-scsi-protect-req-aiocb-with-AioContext-lock.patch
# For bz#2090990 - qemu crash with error scsi_req_unref(SCSIRequest *): Assertion `req->refcount > 0' failed or scsi_dma_complete(void *, int): Assertion `r->req.aiocb != NULL' failed [8.7.0]
Patch256: kvm-dma-helpers-prevent-dma_blk_cb-vs-dma_aio_cancel-rac.patch
# For bz#2090990 - qemu crash with error scsi_req_unref(SCSIRequest *): Assertion `req->refcount > 0' failed or scsi_dma_complete(void *, int): Assertion `r->req.aiocb != NULL' failed [8.7.0]
Patch257: kvm-virtio-scsi-reset-SCSI-devices-from-main-loop-thread.patch
BuildRequires: wget
BuildRequires: rpm-build
@ -1616,33 +1821,165 @@ sh %{_sysconfdir}/sysconfig/modules/kvm.modules &> /dev/null || :
%changelog
* Tue Feb 14 2023 Jon Maloy <jmaloy@redhat.com> - 6.2.0-22.el8_7.2
- kvm-migration-Read-state-once.patch [bz#2168217]
- Resolves: bz#2168217
(while live-migrating many instances concurrently, libvirt sometimes return internal error: migration was active, but no RAM info was set [rhel-8.7.0.z])
* Mon Mar 13 2023 Jon Maloy <jmaloy@redhat.com> - 6.2.0-32.el8_8
- kvm-aio_wait_kick-add-missing-memory-barrier.patch [bz#2168472]
- kvm-qatomic-add-smp_mb__before-after_rmw.patch [bz#2168472]
- kvm-qemu-thread-posix-cleanup-fix-document-QemuEvent.patch [bz#2168472]
- kvm-qemu-thread-win32-cleanup-fix-document-QemuEvent.patch [bz#2168472]
- kvm-edu-add-smp_mb__after_rmw.patch [bz#2168472]
- kvm-aio-wait-switch-to-smp_mb__after_rmw.patch [bz#2168472]
- kvm-qemu-coroutine-lock-add-smp_mb__after_rmw.patch [bz#2168472]
- kvm-physmem-add-missing-memory-barrier.patch [bz#2168472]
- kvm-async-update-documentation-of-the-memory-barriers.patch [bz#2168472]
- kvm-async-clarify-usage-of-barriers-in-the-polling-case.patch [bz#2168472]
- kvm-scsi-protect-req-aiocb-with-AioContext-lock.patch [bz#2090990]
- kvm-dma-helpers-prevent-dma_blk_cb-vs-dma_aio_cancel-rac.patch [bz#2090990]
- kvm-virtio-scsi-reset-SCSI-devices-from-main-loop-thread.patch [bz#2090990]
- Resolves: bz#2168472
(Guest hangs when starting or rebooting)
- Resolves: bz#2090990
(qemu crash with error scsi_req_unref(SCSIRequest *): Assertion `req->refcount > 0' failed or scsi_dma_complete(void *, int): Assertion `r->req.aiocb != NULL' failed [8.7.0])
* Thu Dec 15 2022 Jon Maloy <jmaloy@redhat.com> - 6.2.0-21.el8_7.2
- kvm-ui-vnc.c-Fixed-a-deadlock-bug.patch [bz#2148504]
- kvm-hw-display-qxl-Have-qxl_log_command-Return-early-if-.patch [bz#2152085]
- kvm-hw-display-qxl-Document-qxl_phys2virt.patch [bz#2152085]
- kvm-hw-display-qxl-Pass-requested-buffer-size-to-qxl_phy.patch [bz#2152085]
- kvm-hw-display-qxl-Avoid-buffer-overrun-in-qxl_phys2virt.patch [bz#2152085]
- kvm-hw-display-qxl-Assert-memory-slot-fits-in-preallocat.patch [bz#2152085]
- Resolves: bz#2148504
(VMs hung on vnc_clipboard_send [rhel-8.7.0.z])
- Resolves: bz#2152085
(CVE-2022-4144 virt:rhel/qemu-kvm: QEMU: QXL: qxl_phys2virt unsafe address translation can lead to out-of-bounds read [rhel-8] [rhel-8.7.0.z])
* Wed Feb 15 2023 Jon Maloy <jmaloy@redhat.com> - 6.2.0-31
- kvm-io-Add-support-for-MSG_PEEK-for-socket-channel.patch [bz#2137740]
- kvm-migration-check-magic-value-for-deciding-the-mapping.patch [bz#2137740]
- kvm-target-s390x-arch_dump-Fix-memory-corruption-in-s390.patch [bz#2168187]
- Resolves: bz#2137740
(Multifd migration fails under a weak network/socket ordering race)
- Resolves: bz#2168187
([s390x] qemu-kvm coredumps when SE crashes)
* Wed Oct 12 2022 Miroslav Rezanina <mrezanin@redhat.com> - 6.2.0-20.el8_7.2
- kvm-virtiofsd-use-g_date_time_get_microsecond-to-get-sub.patch [bz#2132391]
- Resolves: bz#2132391
([virtiofs] virtiofsd debug log's timestamp is NULL [rhel-8.7.0.z])
* Mon Feb 13 2023 Jon Maloy <jmaloy@redhat.com> - 6.2.0-30
- kvm-qcow2-Fix-theoretical-corruption-in-store_bitmap-err.patch [bz#2147617]
- kvm-qemu-img-commit-Report-errors-while-closing-the-imag.patch [bz#2147617]
- kvm-qemu-img-bitmap-Report-errors-while-closing-the-imag.patch [bz#2147617]
- kvm-qemu-iotests-Test-qemu-img-bitmap-commit-exit-code-o.patch [bz#2147617]
- Resolves: bz#2147617
(qemu-img finishes successfully while having errors in commit or bitmaps operations)
* Wed Sep 14 2022 Miroslav Rezanina <mrezanin@redhat.com> - 6.2.0-20.el8.1
- kvm-i386-reset-KVM-nested-state-upon-CPU-reset.patch [bz#2116743]
- kvm-i386-do-kvm_put_msr_feature_control-first-thing-when.patch [bz#2116743]
- Resolves: bz#2116743
([RHEL8.7] Guests in VMX root operation fail to reboot with QEMU's 'system_reset' command)
* Fri Jan 27 2023 Jon Maloy <jmaloy@redhat.com> - 6.2.0-29
- kvm-block-mirror-Do-not-wait-for-active-writes.patch [bz#2125119]
- kvm-block-mirror-Drop-mirror_wait_for_any_operation.patch [bz#2125119]
- kvm-block-mirror-Fix-NULL-s-job-in-active-writes.patch [bz#2125119]
- kvm-accel-introduce-accelerator-blocker-API.patch [bz#2161188]
- kvm-KVM-keep-track-of-running-ioctls.patch [bz#2161188]
- kvm-kvm-Atomic-memslot-updates.patch [bz#2161188]
- kvm-migration-Read-state-once.patch [bz#2074205]
- kvm-s390x-pci-RPCIT-second-pass-when-mappings-exhausted.patch [bz#2163713]
- kvm-s390x-pci-coalesce-unmap-operations.patch [bz#2163713]
- kvm-s390x-pci-shrink-DMA-aperture-to-be-bound-by-vfio-DM.patch [bz#2163713]
- kvm-s390x-pci-reset-ISM-passthrough-devices-on-shutdown-.patch [bz#2163713]
- Resolves: bz#2125119
(Mirror job with "copy-mode":"write-blocking" that used for storage migration can't converge under heavy I/O)
- Resolves: bz#2161188
(SVM: non atomic memslot updates cause boot failure with seabios and cpu-pm=on)
- Resolves: bz#2074205
(while live-migrating many instances concurrently, libvirt sometimes return internal error: migration was active, but no RAM info was set)
- Resolves: bz#2163713
([s390x] VM fails to start with ISM passed through)
* Wed Jan 04 2023 Jon Maloy <jmaloy@redhat.com> - 6.2.0-28
- kvm-s390x-tod-kvm-don-t-save-restore-the-TOD-in-PV-guest.patch [bz#2155448]
- Resolves: bz#2155448
(RHEL8.8 - KVM: s390: pv: don't allow userspace to set the clock under PV - QEMU part)
* Thu Dec 08 2022 Jon Maloy <jmaloy@redhat.com> - 6.2.0-27
- kvm-hw-display-qxl-Have-qxl_log_command-Return-early-if-.patch [bz#2148545]
- kvm-hw-display-qxl-Document-qxl_phys2virt.patch [bz#2148545]
- kvm-hw-display-qxl-Pass-requested-buffer-size-to-qxl_phy.patch [bz#2148545]
- kvm-hw-display-qxl-Avoid-buffer-overrun-in-qxl_phys2virt.patch [bz#2148545]
- kvm-hw-display-qxl-Assert-memory-slot-fits-in-preallocat.patch [bz#2148545]
- Resolves: bz#2148545
(CVE-2022-4144 virt:rhel/qemu-kvm: QEMU: QXL: qxl_phys2virt unsafe address translation can lead to out-of-bounds read [rhel-8])
* Wed Nov 23 2022 Jon Maloy <jmaloy@redhat.com> - 6.2.0-26
- kvm-docs-system-s390x-Document-the-loadparm-machine-prop.patch [bz#2128225]
- kvm-s390x-Register-TYPE_S390_CCW_MACHINE-properties-as-c.patch [bz#2128225]
- kvm-ui-vnc.c-Fixed-a-deadlock-bug.patch [bz#2141896]
- Resolves: bz#2128225
([s390x] [RHEL8][s390x-ccw bios] lacking document about parameter loadparm in qemu)
- Resolves: bz#2141896
(VMs hung on vnc_clipboard_send)
* Wed Nov 16 2022 Jon Maloy <jmaloy@redhat.com> - 6.2.0-25
- kvm-hw-acpi-Add-ospm_status-hook-implementation-for-acpi.patch [bz#2132609]
- kvm-target-arm-kvm-Retry-KVM_CREATE_VM-call-if-it-fails-.patch [bz#2132609]
- Resolves: bz#2132609
(qemu-kvm: backport some aarch64 fixes)
* Thu Nov 10 2022 Jon Maloy <jmaloy@redhat.com> - 6.2.0-24
- kvm-s390x-pci-use-a-reserved-ID-for-the-default-PCI-grou.patch [bz#1664378 bz#2043909]
- kvm-s390x-pci-don-t-use-hard-coded-dma-range-in-reg_ioat.patch [bz#1664378 bz#2043909]
- kvm-s390x-pci-use-the-passthrough-measurement-update-int.patch [bz#1664378 bz#2043909]
- kvm-s390x-pci-add-supported-DT-information-to-clp-respon.patch [bz#1664378 bz#2043909]
- kvm-Update-linux-headers-to-v6.0-rc4.patch [bz#1664378 bz#2043909]
- kvm-s390x-pci-add-routine-to-get-host-function-handle-fr.patch [bz#1664378 bz#2043909]
- kvm-s390x-pci-enable-for-load-store-interpretation.patch [bz#1664378 bz#2043909]
- kvm-s390x-pci-don-t-fence-interpreted-devices-without-MS.patch [bz#1664378 bz#2043909]
- kvm-s390x-pci-enable-adapter-event-notification-for-inte.patch [bz#1664378 bz#2043909]
- kvm-s390x-pci-let-intercept-devices-have-separate-PCI-gr.patch [bz#1664378 bz#2043909]
- kvm-s390x-pci-reflect-proper-maxstbl-for-groups-of-inter.patch [bz#1664378 bz#2043909]
- kvm-s390x-s390-virtio-ccw-Switch-off-zPCI-enhancements-o.patch [bz#1664378 bz#2043909]
- kvm-dump-Use-ERRP_GUARD.patch [bz#1664378 bz#2043909]
- kvm-dump-Remove-the-sh_info-variable.patch [bz#1664378 bz#2043909]
- kvm-dump-Introduce-shdr_num-to-decrease-complexity.patch [bz#1664378 bz#2043909]
- kvm-dump-Remove-the-section-if-when-calculating-the-memo.patch [bz#1664378 bz#2043909]
- kvm-dump-Add-more-offset-variables.patch [bz#1664378 bz#2043909]
- kvm-dump-Introduce-dump_is_64bit-helper-function.patch [bz#1664378 bz#2043909]
- kvm-dump-Consolidate-phdr-note-writes.patch [bz#1664378 bz#2043909]
- kvm-dump-Cleanup-dump_begin-write-functions.patch [bz#1664378 bz#2043909]
- kvm-dump-Consolidate-elf-note-function.patch [bz#1664378 bz#2043909]
- kvm-dump-Replace-opaque-DumpState-pointer-with-a-typed-o.patch [bz#1664378 bz#2043909]
- kvm-dump-Rename-write_elf_loads-to-write_elf_phdr_loads.patch [bz#1664378 bz#2043909]
- kvm-dump-Refactor-dump_iterate-and-introduce-dump_filter.patch [bz#1664378 bz#2043909]
- kvm-dump-Rework-get_start_block.patch [bz#1664378 bz#2043909]
- kvm-dump-Rework-filter-area-variables.patch [bz#1664378 bz#2043909]
- kvm-dump-Rework-dump_calculate_size-function.patch [bz#1664378 bz#2043909]
- kvm-dump-Split-elf-header-functions-into-prepare-and-wri.patch [bz#1664378 bz#2043909]
- kvm-dump-Rename-write_elf-_phdr_note-to-prepare_elf-_phd.patch [bz#1664378 bz#2043909]
- kvm-dump-simplify-a-bit-kdump-get_next_page.patch [bz#1664378 bz#2043909]
- kvm-dump-fix-kdump-to-work-over-non-aligned-blocks.patch [bz#1664378 bz#2043909]
- kvm-dump-Use-a-buffer-for-ELF-section-data-and-headers.patch [bz#1664378 bz#2043909]
- kvm-dump-Write-ELF-section-headers-right-after-ELF-heade.patch [bz#1664378 bz#2043909]
- kvm-dump-Reorder-struct-DumpState.patch [bz#1664378 bz#2043909]
- kvm-dump-Reintroduce-memory_offset-and-section_offset.patch [bz#1664378 bz#2043909]
- kvm-dump-Add-architecture-section-and-section-string-tab.patch [bz#1664378 bz#2043909]
- kvm-s390x-Add-protected-dump-cap.patch [bz#1664378 bz#2043909]
- kvm-s390x-Introduce-PV-query-interface.patch [bz#1664378 bz#2043909]
- kvm-include-elf.h-add-s390x-note-types.patch [bz#1664378 bz#2043909]
- kvm-s390x-Add-KVM-PV-dump-interface.patch [bz#1664378 bz#2043909]
- kvm-s390x-pv-Add-dump-support.patch [bz#1664378 bz#2043909]
- kvm-ui-vnc-clipboard-fix-integer-underflow-in-vnc_client.patch [bz#2129760]
- Resolves: bz#1664378
([IBM 8.8 FEAT] Enhanced Interpretation for PCI Functions (kvm) - qemu part)
- Resolves: bz#2043909
([IBM 8.8 FEAT] KVM: Secure Execution guest dump encryption with customer keys - qemu part)
- Resolves: bz#2129760
(CVE-2022-3165 virt:rhel/qemu-kvm: QEMU: VNC: integer underflow in vnc_client_cut_text_ext leads to CPU exhaustion [rhel-8])
* Wed Oct 26 2022 Jon Maloy <jmaloy@redhat.com> - 6.2.0-23
- kvm-virtio-fix-the-condition-for-iommu_platform-not-supp.patch [bz#2116302]
- kvm-virtio-fix-feature-negotiation-for-ACCESS_PLATFORM.patch [bz#2116302]
- Resolves: bz#2116302
(RHEL8.6 - virtiofs will not mount fs on secure execution guest)
* Wed Oct 05 2022 Jon Maloy <jmaloy@redhat.com> - 6.2.0-22
- kvm-redhat-Update-linux-headers-linux-kvm.h-to-v5.18-rc6.patch [bz#2124757]
- kvm-target-s390x-kvm-Honor-storage-keys-during-emulation.patch [bz#2124757]
- kvm-virtiofsd-use-g_date_time_get_microsecond-to-get-sub.patch [bz#2018885]
- Resolves: bz#2124757
(RHEL8: skey test in kvm_unit_test got failed)
- Resolves: bz#2018885
([virtiofs] virtiofsd debug log's timestamp is NULL)
* Thu Sep 29 2022 Jon Maloy <jmaloy@redhat.com> - 6.2.0-21
- kvm-backends-hostmem-Fix-support-of-memory-backend-memfd.patch [bz#2117149]
- kvm-i386-reset-KVM-nested-state-upon-CPU-reset.patch [bz#2125271]
- kvm-i386-do-kvm_put_msr_feature_control-first-thing-when.patch [bz#2125271]
- Resolves: bz#2117149
(Can't run when memory backing with hugepages and backend type memfd)
- Resolves: bz#2125271
([RHEL8.7] Guests in VMX root operation fail to reboot with QEMU's 'system_reset' command [rhel-8.8.0])
* Fri Aug 26 2022 Jon Maloy <jmaloy@redhat.com> - 6.2.0-20
- kvm-scsi-generic-Fix-emulated-block-limits-VPD-page.patch [bz#2120279]