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* Mon Jul 18 2022 Miroslav Rezanina <mrezanin@redhat.com> - 7.0.0-9

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- kvm-virtio-iommu-Add-bypass-mode-support-to-assigned-dev.patch [bz#2100106]
- kvm-virtio-iommu-Use-recursive-lock-to-avoid-deadlock.patch [bz#2100106]
- kvm-virtio-iommu-Add-an-assert-check-in-translate-routin.patch [bz#2100106]
- kvm-virtio-iommu-Fix-the-partial-copy-of-probe-request.patch [bz#2100106]
- kvm-virtio-iommu-Fix-migration-regression.patch [bz#2100106]
- kvm-pc-bios-s390-ccw-virtio-Introduce-a-macro-for-the-DA.patch [bz#2098077]
- kvm-pc-bios-s390-ccw-bootmap-Improve-the-guessing-logic-.patch [bz#2098077]
- kvm-pc-bios-s390-ccw-virtio-blkdev-Simplify-fix-virtio_i.patch [bz#2098077]
- kvm-pc-bios-s390-ccw-virtio-blkdev-Remove-virtio_assume_.patch [bz#2098077]
- kvm-pc-bios-s390-ccw-virtio-Set-missing-status-bits-whil.patch [bz#2098077]
- kvm-pc-bios-s390-ccw-virtio-Read-device-config-after-fea.patch [bz#2098077]
- kvm-pc-bios-s390-ccw-virtio-Beautify-the-code-for-readin.patch [bz#2098077]
- kvm-pc-bios-s390-ccw-Split-virtio-scsi-code-from-virtio_.patch [bz#2098077]
- kvm-pc-bios-s390-ccw-virtio-blkdev-Request-the-right-fea.patch [bz#2098077]
- kvm-pc-bios-s390-ccw-netboot.mak-Ignore-Clang-s-warnings.patch [bz#2098077]
- kvm-hw-block-fdc-Prevent-end-of-track-overrun-CVE-2021-3.patch [bz#1951522]
- kvm-tests-qtest-fdc-test-Add-a-regression-test-for-CVE-2.patch [bz#1951522]
- Resolves: bz#2100106
  (Fix virtio-iommu/vfio bypass)
- Resolves: bz#2098077
  (virtio-blk: Can't boot fresh installation from used virtio-blk dasd disk under certain conditions)
- Resolves: bz#1951522
  (CVE-2021-3507 qemu-kvm: QEMU: fdc: heap buffer overflow in DMA read data transfers [rhel-9.0])
This commit is contained in:
Miroslav Rezanina 2022-07-18 02:51:23 -04:00
parent da38d5c28e
commit fbb94cc706
18 changed files with 1760 additions and 1 deletions
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96
kvm-hw-block-fdc-Prevent-end-of-track-overrun-CVE-2021-3.patch Normal file
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From 6ee4a8718dcce2d6da43ee200534b75baf1d7bbe Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= <philmd@redhat.com>
Date: Thu, 18 Nov 2021 12:57:32 +0100
Subject: [PATCH 16/17] hw/block/fdc: Prevent end-of-track overrun
(CVE-2021-3507)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Jon Maloy <jmaloy@redhat.com>
RH-MergeRequest: 107: hw/block/fdc: Prevent end-of-track overrun (CVE-2021-3507)
RH-Commit: [1/2] 9ffc5290348884d20b894fa79f4d0c8089247f8b (mrezanin/centos-src-qemu-kvm)
RH-Bugzilla: 1951522
RH-Acked-by: Hanna Reitz <hreitz@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
Per the 82078 datasheet, if the end-of-track (EOT byte in
the FIFO) is more than the number of sectors per side, the
command is terminated unsuccessfully:
* 5.2.5 DATA TRANSFER TERMINATION
The 82078 supports terminal count explicitly through
the TC pin and implicitly through the underrun/over-
run and end-of-track (EOT) functions. For full sector
transfers, the EOT parameter can define the last
sector to be transferred in a single or multisector
transfer. If the last sector to be transferred is a par-
tial sector, the host can stop transferring the data in
mid-sector, and the 82078 will continue to complete
the sector as if a hardware TC was received. The
only difference between these implicit functions and
TC is that they return "abnormal termination" result
status. Such status indications can be ignored if they
were expected.
* 6.1.3 READ TRACK
This command terminates when the EOT specified
number of sectors have been read. If the 82078
does not find an I D Address Mark on the diskette
after the second· occurrence of a pulse on the
INDX# pin, then it sets the IC code in Status Regis-
ter 0 to "01" (Abnormal termination), sets the MA bit
in Status Register 1 to "1", and terminates the com-
mand.
* 6.1.6 VERIFY
Refer to Table 6-6 and Table 6-7 for information
concerning the values of MT and EC versus SC and
EOT value.
* Table 6·6. Result Phase Table
* Table 6-7. Verify Command Result Phase Table
Fix by aborting the transfer when EOT > # Sectors Per Side.
Cc: qemu-stable@nongnu.org
Cc: Hervé Poussineau <hpoussin@reactos.org>
Fixes: baca51faff0 ("floppy driver: disk geometry auto detect")
Reported-by: Alexander Bulekov <alxndr@bu.edu>
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/339
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20211118115733.4038610-2-philmd@redhat.com>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit defac5e2fbddf8423a354ff0454283a2115e1367)
Signed-off-by: Jon Maloy <jmaloy@redhat.com>
---
hw/block/fdc.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/hw/block/fdc.c b/hw/block/fdc.c
index ca1776121f..6481ec0cfb 100644
--- a/hw/block/fdc.c
+++ b/hw/block/fdc.c
@@ -1532,6 +1532,14 @@ static void fdctrl_start_transfer(FDCtrl *fdctrl, int direction)
int tmp;
fdctrl->data_len = 128 << (fdctrl->fifo[5] > 7 ? 7 : fdctrl->fifo[5]);
tmp = (fdctrl->fifo[6] - ks + 1);
+ if (tmp < 0) {
+ FLOPPY_DPRINTF("invalid EOT: %d\n", tmp);
+ fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, 0x00);
+ fdctrl->fifo[3] = kt;
+ fdctrl->fifo[4] = kh;
+ fdctrl->fifo[5] = ks;
+ return;
+ }
if (fdctrl->fifo[0] & 0x80)
tmp += fdctrl->fifo[6];
fdctrl->data_len *= tmp;
--
2.31.1

180
kvm-pc-bios-s390-ccw-Split-virtio-scsi-code-from-virtio_.patch Normal file
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From 2e38b4ec5c53b2b98539a70105d3046e1c452ab8 Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Fri, 8 Jul 2022 20:49:01 +0200
Subject: [PATCH 13/17] pc-bios/s390-ccw: Split virtio-scsi code from
virtio_blk_setup_device()
RH-Author: Thomas Huth <thuth@redhat.com>
RH-MergeRequest: 106: pc-bios/s390-ccw: Fix boot from disks with 4k sectors that do not have the typical DASD geometry
RH-Commit: [8/10] f49c5fb77e05c9dc09ed9f037e37f6a461e4bba6 (thuth/qemu-kvm-cs9)
RH-Bugzilla: 2098077
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
Bugzilla: http://bugzilla.redhat.com/2098077
commit cf30b7c4a9b2c64518be8037c2e6670aacdb00b9
Author: Thomas Huth <thuth@redhat.com>
Date: Mon Jul 4 13:19:00 2022 +0200
pc-bios/s390-ccw: Split virtio-scsi code from virtio_blk_setup_device()
The next patch is going to add more virtio-block specific code to
virtio_blk_setup_device(), and if the virtio-scsi code is also in
there, this is more cumbersome. And the calling function virtio_setup()
in main.c looks at the device type already anyway, so it's more
logical to separate the virtio-scsi stuff into a new function in
virtio-scsi.c instead.
Message-Id: <20220704111903.62400-10-thuth@redhat.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/main.c | 24 +++++++++++++++++-------
pc-bios/s390-ccw/virtio-blkdev.c | 20 ++------------------
pc-bios/s390-ccw/virtio-scsi.c | 19 ++++++++++++++++++-
pc-bios/s390-ccw/virtio-scsi.h | 2 +-
4 files changed, 38 insertions(+), 27 deletions(-)
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index 5d2b7ba94d..13e1d8fdf7 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -14,6 +14,7 @@
#include "s390-ccw.h"
#include "cio.h"
#include "virtio.h"
+#include "virtio-scsi.h"
#include "dasd-ipl.h"
char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
@@ -218,6 +219,7 @@ static int virtio_setup(void)
{
VDev *vdev = virtio_get_device();
QemuIplParameters *early_qipl = (QemuIplParameters *)QIPL_ADDRESS;
+ int ret;
memcpy(&qipl, early_qipl, sizeof(QemuIplParameters));
@@ -225,18 +227,26 @@ static int virtio_setup(void)
menu_setup();
}
- if (virtio_get_device_type() == VIRTIO_ID_NET) {
+ switch (vdev->senseid.cu_model) {
+ case VIRTIO_ID_NET:
sclp_print("Network boot device detected\n");
vdev->netboot_start_addr = qipl.netboot_start_addr;
- } else {
- int ret = virtio_blk_setup_device(blk_schid);
- if (ret) {
- return ret;
- }
+ return 0;
+ case VIRTIO_ID_BLOCK:
+ ret = virtio_blk_setup_device(blk_schid);
+ break;
+ case VIRTIO_ID_SCSI:
+ ret = virtio_scsi_setup_device(blk_schid);
+ break;
+ default:
+ panic("\n! No IPL device available !\n");
+ }
+
+ if (!ret) {
IPL_assert(virtio_ipl_disk_is_valid(), "No valid IPL device detected");
}
- return 0;
+ return ret;
}
static void ipl_boot_device(void)
diff --git a/pc-bios/s390-ccw/virtio-blkdev.c b/pc-bios/s390-ccw/virtio-blkdev.c
index db1f7f44aa..c175b66a47 100644
--- a/pc-bios/s390-ccw/virtio-blkdev.c
+++ b/pc-bios/s390-ccw/virtio-blkdev.c
@@ -222,27 +222,11 @@ uint64_t virtio_get_blocks(void)
int virtio_blk_setup_device(SubChannelId schid)
{
VDev *vdev = virtio_get_device();
- int ret = 0;
vdev->schid = schid;
virtio_setup_ccw(vdev);
- switch (vdev->senseid.cu_model) {
- case VIRTIO_ID_BLOCK:
- sclp_print("Using virtio-blk.\n");
- break;
- case VIRTIO_ID_SCSI:
- IPL_assert(vdev->config.scsi.sense_size == VIRTIO_SCSI_SENSE_SIZE,
- "Config: sense size mismatch");
- IPL_assert(vdev->config.scsi.cdb_size == VIRTIO_SCSI_CDB_SIZE,
- "Config: CDB size mismatch");
+ sclp_print("Using virtio-blk.\n");
- sclp_print("Using virtio-scsi.\n");
- ret = virtio_scsi_setup(vdev);
- break;
- default:
- panic("\n! No IPL device available !\n");
- }
-
- return ret;
+ return 0;
}
diff --git a/pc-bios/s390-ccw/virtio-scsi.c b/pc-bios/s390-ccw/virtio-scsi.c
index 2c8d0f3097..3b7069270c 100644
--- a/pc-bios/s390-ccw/virtio-scsi.c
+++ b/pc-bios/s390-ccw/virtio-scsi.c
@@ -329,7 +329,7 @@ static void scsi_parse_capacity_report(void *data,
}
}
-int virtio_scsi_setup(VDev *vdev)
+static int virtio_scsi_setup(VDev *vdev)
{
int retry_test_unit_ready = 3;
uint8_t data[256];
@@ -430,3 +430,20 @@ int virtio_scsi_setup(VDev *vdev)
return 0;
}
+
+int virtio_scsi_setup_device(SubChannelId schid)
+{
+ VDev *vdev = virtio_get_device();
+
+ vdev->schid = schid;
+ virtio_setup_ccw(vdev);
+
+ IPL_assert(vdev->config.scsi.sense_size == VIRTIO_SCSI_SENSE_SIZE,
+ "Config: sense size mismatch");
+ IPL_assert(vdev->config.scsi.cdb_size == VIRTIO_SCSI_CDB_SIZE,
+ "Config: CDB size mismatch");
+
+ sclp_print("Using virtio-scsi.\n");
+
+ return virtio_scsi_setup(vdev);
+}
diff --git a/pc-bios/s390-ccw/virtio-scsi.h b/pc-bios/s390-ccw/virtio-scsi.h
index 4b14c2c2f9..e6b6cd4815 100644
--- a/pc-bios/s390-ccw/virtio-scsi.h
+++ b/pc-bios/s390-ccw/virtio-scsi.h
@@ -67,8 +67,8 @@ static inline bool virtio_scsi_response_ok(const VirtioScsiCmdResp *r)
return r->response == VIRTIO_SCSI_S_OK && r->status == CDB_STATUS_GOOD;
}
-int virtio_scsi_setup(VDev *vdev);
int virtio_scsi_read_many(VDev *vdev,
ulong sector, void *load_addr, int sec_num);
+int virtio_scsi_setup_device(SubChannelId schid);
#endif /* VIRTIO_SCSI_H */
--
2.31.1

102
kvm-pc-bios-s390-ccw-bootmap-Improve-the-guessing-logic-.patch Normal file
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@ -0,0 +1,102 @@
From 64fa56e0520215e3909e442f09d8073c1870648a Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Fri, 8 Jul 2022 20:49:01 +0200
Subject: [PATCH 07/17] pc-bios/s390-ccw/bootmap: Improve the guessing logic in
zipl_load_vblk()
RH-Author: Thomas Huth <thuth@redhat.com>
RH-MergeRequest: 106: pc-bios/s390-ccw: Fix boot from disks with 4k sectors that do not have the typical DASD geometry
RH-Commit: [2/10] ca8f5e847617cf4ac2fd6c38edb2982f32fa3eba (thuth/qemu-kvm-cs9)
RH-Bugzilla: 2098077
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
Bugzilla: http://bugzilla.redhat.com/2098077
commit 422865f6672ee1482b98d18321b55c1ecfb06c82
Author: Thomas Huth <thuth@redhat.com>
Date: Mon Jul 4 13:18:54 2022 +0200
pc-bios/s390-ccw/bootmap: Improve the guessing logic in zipl_load_vblk()
The logic of trying an final ISO or ECKD boot on virtio-block devices is
very weird: Since the geometry hardly ever matches in virtio_disk_is_scsi(),
virtio_blk_setup_device() always sets a "guessed" disk geometry via
virtio_assume_scsi() (which is certainly also wrong in a lot of cases).
zipl_load_vblk() then sees that there's been a "virtio_guessed_disk_nature"
and tries to fix up the geometry again via virtio_assume_iso9660() before
always trying to do ipl_iso_el_torito(). That's a very brain-twisting
way of attempting to boot from ISO images, which won't work anymore after
the following patches that will clean up the virtio_assume_scsi() mess
(and thus get rid of the "virtio_guessed_disk_nature" here).
Let's try a better approach instead: ISO files always have a magic
string "CD001" at offset 0x8001 (see e.g. the ECMA-119 specification)
which we can use to decide whether we should try to boot in ISO 9660
mode (which we should also try if we see a sector size of 2048).
And if we were not able to boot in ISO mode here, the final boot attempt
before panicking is to boot in ECKD mode. Since this is our last boot
attempt anyway, simply always assume the ECKD geometry here (if the sector
size was not 4096 yet), so that we also do not depend on the guessed disk
geometry from virtio_blk_setup_device() here anymore.
Message-Id: <20220704111903.62400-4-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/bootmap.c | 27 +++++++++++++++++++++++----
1 file changed, 23 insertions(+), 4 deletions(-)
diff --git a/pc-bios/s390-ccw/bootmap.c b/pc-bios/s390-ccw/bootmap.c
index 56411ab3b6..994e59c0b0 100644
--- a/pc-bios/s390-ccw/bootmap.c
+++ b/pc-bios/s390-ccw/bootmap.c
@@ -780,18 +780,37 @@ static void ipl_iso_el_torito(void)
}
}
+/**
+ * Detect whether we're trying to boot from an .ISO image.
+ * These always have a signature string "CD001" at offset 0x8001.
+ */
+static bool has_iso_signature(void)
+{
+ int blksize = virtio_get_block_size();
+
+ if (!blksize || virtio_read(0x8000 / blksize, sec)) {
+ return false;
+ }
+
+ return !memcmp("CD001", &sec[1], 5);
+}
+
/***********************************************************************
* Bus specific IPL sequences
*/
static void zipl_load_vblk(void)
{
- if (virtio_guessed_disk_nature()) {
- virtio_assume_iso9660();
+ int blksize = virtio_get_block_size();
+
+ if (blksize == VIRTIO_ISO_BLOCK_SIZE || has_iso_signature()) {
+ if (blksize != VIRTIO_ISO_BLOCK_SIZE) {
+ virtio_assume_iso9660();
+ }
+ ipl_iso_el_torito();
}
- ipl_iso_el_torito();
- if (virtio_guessed_disk_nature()) {
+ if (blksize != VIRTIO_DASD_DEFAULT_BLOCK_SIZE) {
sclp_print("Using guessed DASD geometry.\n");
virtio_assume_eckd();
}
--
2.31.1

78
kvm-pc-bios-s390-ccw-netboot.mak-Ignore-Clang-s-warnings.patch Normal file
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@ -0,0 +1,78 @@
From 56674ee1f25f12978a6a8a1390e11b55b3e0fabe Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Fri, 8 Jul 2022 20:49:01 +0200
Subject: [PATCH 15/17] pc-bios/s390-ccw/netboot.mak: Ignore Clang's warnings
about GNU extensions
RH-Author: Thomas Huth <thuth@redhat.com>
RH-MergeRequest: 106: pc-bios/s390-ccw: Fix boot from disks with 4k sectors that do not have the typical DASD geometry
RH-Commit: [10/10] 037dab4df23ebb2b42871bca8c842a53a7204b50 (thuth/qemu-kvm-cs9)
RH-Bugzilla: 2098077
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
Bugzilla: http://bugzilla.redhat.com/2098077
commit e2269220acb03e6c6a460c3090d804835e202239
Author: Thomas Huth <thuth@redhat.com>
Date: Mon Jul 4 13:19:03 2022 +0200
pc-bios/s390-ccw/netboot.mak: Ignore Clang's warnings about GNU extensions
When compiling the s390-ccw bios with Clang (v14.0), there is currently
an unuseful warning like this:
CC pc-bios/s390-ccw/ipv6.o
../../roms/SLOF/lib/libnet/ipv6.c:447:18: warning: variable length array
folded to constant array as an extension [-Wgnu-folding-constant]
unsigned short raw[ip6size];
^
SLOF is currently GCC-only and cannot be compiled with Clang yet, so
it is expected that such extensions sneak in there - and as long as
we don't want to compile the code with a compiler that is neither GCC
or Clang, it is also not necessary to avoid such extensions.
Thus these GNU-extension related warnings are completely useless in
the s390-ccw bios, especially in the code that is coming from SLOF,
so we should simply disable the related warnings here now.
Message-Id: <20220704111903.62400-13-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/netboot.mak | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/pc-bios/s390-ccw/netboot.mak b/pc-bios/s390-ccw/netboot.mak
index 68b4d7edcb..ad41898cb6 100644
--- a/pc-bios/s390-ccw/netboot.mak
+++ b/pc-bios/s390-ccw/netboot.mak
@@ -16,9 +16,12 @@ s390-netboot.elf: $(NETOBJS) libnet.a libc.a
s390-netboot.img: s390-netboot.elf
$(call quiet-command,$(STRIP) --strip-unneeded $< -o $@,"STRIP","$(TARGET_DIR)$@")
+# SLOF is GCC-only, so ignore warnings about GNU extensions with Clang here
+NO_GNU_WARN := $(call cc-option,-Werror $(QEMU_CFLAGS),-Wno-gnu)
+
# libc files:
-LIBC_CFLAGS = $(QEMU_CFLAGS) $(CFLAGS) $(LIBC_INC) $(LIBNET_INC) \
+LIBC_CFLAGS = $(QEMU_CFLAGS) $(CFLAGS) $(NO_GNU_WARN) $(LIBC_INC) $(LIBNET_INC) \
-MMD -MP -MT $@ -MF $(@:%.o=%.d)
CTYPE_OBJS = isdigit.o isxdigit.o toupper.o
@@ -52,7 +55,7 @@ libc.a: $(LIBCOBJS)
LIBNETOBJS := args.o dhcp.o dns.o icmpv6.o ipv6.o tcp.o udp.o bootp.o \
dhcpv6.o ethernet.o ipv4.o ndp.o tftp.o pxelinux.o
-LIBNETCFLAGS = $(QEMU_CFLAGS) $(CFLAGS) $(LIBC_INC) $(LIBNET_INC) \
+LIBNETCFLAGS = $(QEMU_CFLAGS) $(CFLAGS) $(NO_GNU_WARN) $(LIBC_INC) $(LIBNET_INC) \
-DDHCPARCH=0x1F -MMD -MP -MT $@ -MF $(@:%.o=%.d)
%.o : $(SLOF_DIR)/lib/libnet/%.c
--
2.31.1

56
kvm-pc-bios-s390-ccw-virtio-Beautify-the-code-for-readin.patch Normal file
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@ -0,0 +1,56 @@
From 430e76fd964390db86c8486f76b916a1cf7f74c2 Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Fri, 8 Jul 2022 20:49:01 +0200
Subject: [PATCH 12/17] pc-bios/s390-ccw/virtio: Beautify the code for reading
virtqueue configuration
RH-Author: Thomas Huth <thuth@redhat.com>
RH-MergeRequest: 106: pc-bios/s390-ccw: Fix boot from disks with 4k sectors that do not have the typical DASD geometry
RH-Commit: [7/10] b15c06b4c5431837672b6cb5d57d09da20718441 (thuth/qemu-kvm-cs9)
RH-Bugzilla: 2098077
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
Bugzilla: http://bugzilla.redhat.com/2098077
commit 070824885741f5d2a66626d3c4ecb2773c8e0552
Author: Thomas Huth <thuth@redhat.com>
Date: Mon Jul 4 13:18:59 2022 +0200
pc-bios/s390-ccw/virtio: Beautify the code for reading virtqueue configuration
It looks nicer if we separate the run_ccw() from the IPL_assert()
statement, and the error message should talk about "virtio device"
instead of "block device", since this code is nowadays used for
non-block (i.e. network) devices, too.
Message-Id: <20220704111903.62400-9-thuth@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/virtio.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/pc-bios/s390-ccw/virtio.c b/pc-bios/s390-ccw/virtio.c
index d8c2b52710..f37510f312 100644
--- a/pc-bios/s390-ccw/virtio.c
+++ b/pc-bios/s390-ccw/virtio.c
@@ -289,9 +289,8 @@ void virtio_setup_ccw(VDev *vdev)
.num = 0,
};
- IPL_assert(
- run_ccw(vdev, CCW_CMD_READ_VQ_CONF, &config, sizeof(config), false) == 0,
- "Could not get block device VQ configuration");
+ rc = run_ccw(vdev, CCW_CMD_READ_VQ_CONF, &config, sizeof(config), false);
+ IPL_assert(rc == 0, "Could not get virtio device VQ configuration");
info.num = config.num;
vring_init(&vdev->vrings[i], &info);
vdev->vrings[i].schid = vdev->schid;
--
2.31.1

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@ -0,0 +1,63 @@
From 7d4f2454f95bfc087ad3f2fe3bc4625dcea3568e Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Fri, 8 Jul 2022 20:49:01 +0200
Subject: [PATCH 06/17] pc-bios/s390-ccw/virtio: Introduce a macro for the DASD
block size
RH-Author: Thomas Huth <thuth@redhat.com>
RH-MergeRequest: 106: pc-bios/s390-ccw: Fix boot from disks with 4k sectors that do not have the typical DASD geometry
RH-Commit: [1/10] 71033934e1e9988bcf71362e02665ceb7449009d (thuth/qemu-kvm-cs9)
RH-Bugzilla: 2098077
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
Bugzilla: http://bugzilla.redhat.com/2098077
commit 1f2c2ee48e87ea743f8e23cc7569dd26c4cf9623
Author: Thomas Huth <thuth@redhat.com>
Date: Mon Jul 4 13:18:53 2022 +0200
pc-bios/s390-ccw/virtio: Introduce a macro for the DASD block size
Use VIRTIO_DASD_DEFAULT_BLOCK_SIZE instead of the magic value 4096.
Message-Id: <20220704111903.62400-3-thuth@redhat.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/virtio-blkdev.c | 2 +-
pc-bios/s390-ccw/virtio.h | 1 +
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/pc-bios/s390-ccw/virtio-blkdev.c b/pc-bios/s390-ccw/virtio-blkdev.c
index 7d35050292..6483307630 100644
--- a/pc-bios/s390-ccw/virtio-blkdev.c
+++ b/pc-bios/s390-ccw/virtio-blkdev.c
@@ -155,7 +155,7 @@ void virtio_assume_eckd(void)
vdev->config.blk.physical_block_exp = 0;
switch (vdev->senseid.cu_model) {
case VIRTIO_ID_BLOCK:
- vdev->config.blk.blk_size = 4096;
+ vdev->config.blk.blk_size = VIRTIO_DASD_DEFAULT_BLOCK_SIZE;
break;
case VIRTIO_ID_SCSI:
vdev->config.blk.blk_size = vdev->scsi_block_size;
diff --git a/pc-bios/s390-ccw/virtio.h b/pc-bios/s390-ccw/virtio.h
index 19fceb6495..9e410bde6f 100644
--- a/pc-bios/s390-ccw/virtio.h
+++ b/pc-bios/s390-ccw/virtio.h
@@ -198,6 +198,7 @@ extern int virtio_read_many(ulong sector, void *load_addr, int sec_num);
#define VIRTIO_SECTOR_SIZE 512
#define VIRTIO_ISO_BLOCK_SIZE 2048
#define VIRTIO_SCSI_BLOCK_SIZE 512
+#define VIRTIO_DASD_DEFAULT_BLOCK_SIZE 4096
static inline ulong virtio_sector_adjust(ulong sector)
{
--
2.31.1

67
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@ -0,0 +1,67 @@
From 20f8724d0837acbe642c8c7698a4b256f34c1209 Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Fri, 8 Jul 2022 20:49:01 +0200
Subject: [PATCH 11/17] pc-bios/s390-ccw/virtio: Read device config after
feature negotiation
RH-Author: Thomas Huth <thuth@redhat.com>
RH-MergeRequest: 106: pc-bios/s390-ccw: Fix boot from disks with 4k sectors that do not have the typical DASD geometry
RH-Commit: [6/10] 54d21e430b2dfba9e0a0823d6bb8ec7e7f8ff2ff (thuth/qemu-kvm-cs9)
RH-Bugzilla: 2098077
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
Bugzilla: http://bugzilla.redhat.com/2098077
commit aa5c69ce99411c4886bcd051f288afc02b6d968d
Author: Thomas Huth <thuth@redhat.com>
Date: Mon Jul 4 13:18:58 2022 +0200
pc-bios/s390-ccw/virtio: Read device config after feature negotiation
Feature negotiation should be done first, since some fields in the
config area can depend on the negotiated features and thus should
rather be read afterwards.
While we're at it, also adjust the error message here a little bit
(the code is nowadays used for non-block virtio devices, too).
Message-Id: <20220704111903.62400-8-thuth@redhat.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/virtio.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/pc-bios/s390-ccw/virtio.c b/pc-bios/s390-ccw/virtio.c
index 4e85a2eb82..d8c2b52710 100644
--- a/pc-bios/s390-ccw/virtio.c
+++ b/pc-bios/s390-ccw/virtio.c
@@ -262,10 +262,6 @@ void virtio_setup_ccw(VDev *vdev)
rc = run_ccw(vdev, CCW_CMD_WRITE_STATUS, &status, sizeof(status), false);
IPL_assert(rc == 0, "Could not write DRIVER status to host");
- IPL_assert(
- run_ccw(vdev, CCW_CMD_READ_CONF, &vdev->config, cfg_size, false) == 0,
- "Could not get block device configuration");
-
/* Feature negotiation */
for (i = 0; i < ARRAY_SIZE(vdev->guest_features); i++) {
feats.features = 0;
@@ -278,6 +274,9 @@ void virtio_setup_ccw(VDev *vdev)
IPL_assert(rc == 0, "Could not set features bits");
}
+ rc = run_ccw(vdev, CCW_CMD_READ_CONF, &vdev->config, cfg_size, false);
+ IPL_assert(rc == 0, "Could not get virtio device configuration");
+
for (i = 0; i < vdev->nr_vqs; i++) {
VqInfo info = {
.queue = (unsigned long long) ring_area + (i * VIRTIO_RING_SIZE),
--
2.31.1

93
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@ -0,0 +1,93 @@
From 303fb3ddcdbbd1373c5b1aa28e03f90507e217f3 Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Fri, 8 Jul 2022 20:49:01 +0200
Subject: [PATCH 10/17] pc-bios/s390-ccw/virtio: Set missing status bits while
initializing
RH-Author: Thomas Huth <thuth@redhat.com>
RH-MergeRequest: 106: pc-bios/s390-ccw: Fix boot from disks with 4k sectors that do not have the typical DASD geometry
RH-Commit: [5/10] 4bc44d9adae055fb60b79d04a2f08535b4d38d2b (thuth/qemu-kvm-cs9)
RH-Bugzilla: 2098077
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
Bugzilla: http://bugzilla.redhat.com/2098077
commit 175aa06a152ef6b58ba9b2e47a1296b024dea70c
Author: Thomas Huth <thuth@redhat.com>
Date: Mon Jul 4 13:18:57 2022 +0200
pc-bios/s390-ccw/virtio: Set missing status bits while initializing
According chapter "3.1.1 Driver Requirements: Device Initialization"
of the Virtio specification (v1.1), a driver for a device has to set
the ACKNOWLEDGE and DRIVER bits in the status field after resetting
the device. The s390-ccw bios skipped these steps so far and seems
like QEMU never cared. Anyway, it's better to follow the spec, so
let's set these bits now in the right spots, too.
Message-Id: <20220704111903.62400-7-thuth@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/virtio.c | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)
diff --git a/pc-bios/s390-ccw/virtio.c b/pc-bios/s390-ccw/virtio.c
index 5d2c6e3381..4e85a2eb82 100644
--- a/pc-bios/s390-ccw/virtio.c
+++ b/pc-bios/s390-ccw/virtio.c
@@ -220,7 +220,7 @@ int virtio_run(VDev *vdev, int vqid, VirtioCmd *cmd)
void virtio_setup_ccw(VDev *vdev)
{
int i, rc, cfg_size = 0;
- unsigned char status = VIRTIO_CONFIG_S_DRIVER_OK;
+ uint8_t status;
struct VirtioFeatureDesc {
uint32_t features;
uint8_t index;
@@ -234,6 +234,10 @@ void virtio_setup_ccw(VDev *vdev)
run_ccw(vdev, CCW_CMD_VDEV_RESET, NULL, 0, false);
+ status = VIRTIO_CONFIG_S_ACKNOWLEDGE;
+ rc = run_ccw(vdev, CCW_CMD_WRITE_STATUS, &status, sizeof(status), false);
+ IPL_assert(rc == 0, "Could not write ACKNOWLEDGE status to host");
+
switch (vdev->senseid.cu_model) {
case VIRTIO_ID_NET:
vdev->nr_vqs = 2;
@@ -253,6 +257,11 @@ void virtio_setup_ccw(VDev *vdev)
default:
panic("Unsupported virtio device\n");
}
+
+ status |= VIRTIO_CONFIG_S_DRIVER;
+ rc = run_ccw(vdev, CCW_CMD_WRITE_STATUS, &status, sizeof(status), false);
+ IPL_assert(rc == 0, "Could not write DRIVER status to host");
+
IPL_assert(
run_ccw(vdev, CCW_CMD_READ_CONF, &vdev->config, cfg_size, false) == 0,
"Could not get block device configuration");
@@ -291,9 +300,10 @@ void virtio_setup_ccw(VDev *vdev)
run_ccw(vdev, CCW_CMD_SET_VQ, &info, sizeof(info), false) == 0,
"Cannot set VQ info");
}
- IPL_assert(
- run_ccw(vdev, CCW_CMD_WRITE_STATUS, &status, sizeof(status), false) == 0,
- "Could not write status to host");
+
+ status |= VIRTIO_CONFIG_S_DRIVER_OK;
+ rc = run_ccw(vdev, CCW_CMD_WRITE_STATUS, &status, sizeof(status), false);
+ IPL_assert(rc == 0, "Could not write DRIVER_OK status to host");
}
bool virtio_is_supported(SubChannelId schid)
--
2.31.1

101
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@ -0,0 +1,101 @@
From d3335a98a7b6e084aadf4907968536a67cf8e64c Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Fri, 8 Jul 2022 20:49:01 +0200
Subject: [PATCH 09/17] pc-bios/s390-ccw/virtio-blkdev: Remove
virtio_assume_scsi()
RH-Author: Thomas Huth <thuth@redhat.com>
RH-MergeRequest: 106: pc-bios/s390-ccw: Fix boot from disks with 4k sectors that do not have the typical DASD geometry
RH-Commit: [4/10] bf27f75344f220a03475a2918ed49ec9cd5ba317 (thuth/qemu-kvm-cs9)
RH-Bugzilla: 2098077
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
Bugzilla: http://bugzilla.redhat.com/2098077
commit 5447de2619050a0a4dd480b97f88a9b58da360d1
Author: Thomas Huth <thuth@redhat.com>
Date: Mon Jul 4 13:18:56 2022 +0200
pc-bios/s390-ccw/virtio-blkdev: Remove virtio_assume_scsi()
The virtio_assume_scsi() function is very questionable: First, it
is only called for virtio-blk, and not for virtio-scsi, so the naming
is already quite confusing. Second, it is called if we detected a
"invalid" IPL disk, trying to fix it by blindly setting a sector
size of 512. This of course won't work in most cases since disks
might have a different sector size for a reason.
Thus let's remove this strange function now. The calling code can
also be removed completely, since there is another spot in main.c
that does "IPL_assert(virtio_ipl_disk_is_valid(), ...)" to make
sure that we do not try to IPL from an invalid device.
Message-Id: <20220704111903.62400-6-thuth@redhat.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/virtio-blkdev.c | 24 ------------------------
pc-bios/s390-ccw/virtio.h | 1 -
2 files changed, 25 deletions(-)
diff --git a/pc-bios/s390-ccw/virtio-blkdev.c b/pc-bios/s390-ccw/virtio-blkdev.c
index 7e13155589..db1f7f44aa 100644
--- a/pc-bios/s390-ccw/virtio-blkdev.c
+++ b/pc-bios/s390-ccw/virtio-blkdev.c
@@ -112,23 +112,6 @@ VirtioGDN virtio_guessed_disk_nature(void)
return virtio_get_device()->guessed_disk_nature;
}
-void virtio_assume_scsi(void)
-{
- VDev *vdev = virtio_get_device();
-
- switch (vdev->senseid.cu_model) {
- case VIRTIO_ID_BLOCK:
- vdev->guessed_disk_nature = VIRTIO_GDN_SCSI;
- vdev->config.blk.blk_size = VIRTIO_SCSI_BLOCK_SIZE;
- vdev->config.blk.physical_block_exp = 0;
- vdev->blk_factor = 1;
- break;
- case VIRTIO_ID_SCSI:
- vdev->scsi_block_size = VIRTIO_SCSI_BLOCK_SIZE;
- break;
- }
-}
-
void virtio_assume_iso9660(void)
{
VDev *vdev = virtio_get_device();
@@ -247,13 +230,6 @@ int virtio_blk_setup_device(SubChannelId schid)
switch (vdev->senseid.cu_model) {
case VIRTIO_ID_BLOCK:
sclp_print("Using virtio-blk.\n");
- if (!virtio_ipl_disk_is_valid()) {
- /* make sure all getters but blocksize return 0 for
- * invalid IPL disk
- */
- memset(&vdev->config.blk, 0, sizeof(vdev->config.blk));
- virtio_assume_scsi();
- }
break;
case VIRTIO_ID_SCSI:
IPL_assert(vdev->config.scsi.sense_size == VIRTIO_SCSI_SENSE_SIZE,
diff --git a/pc-bios/s390-ccw/virtio.h b/pc-bios/s390-ccw/virtio.h
index 241730effe..600ba5052b 100644
--- a/pc-bios/s390-ccw/virtio.h
+++ b/pc-bios/s390-ccw/virtio.h
@@ -182,7 +182,6 @@ enum guessed_disk_nature_type {
typedef enum guessed_disk_nature_type VirtioGDN;
VirtioGDN virtio_guessed_disk_nature(void);
-void virtio_assume_scsi(void);
void virtio_assume_eckd(void);
void virtio_assume_iso9660(void);
--
2.31.1

63
kvm-pc-bios-s390-ccw-virtio-blkdev-Request-the-right-fea.patch Normal file
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@ -0,0 +1,63 @@
From db58915fcaf3d24b64fe2c34cc15b5596b9a81bb Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Fri, 8 Jul 2022 20:49:01 +0200
Subject: [PATCH 14/17] pc-bios/s390-ccw/virtio-blkdev: Request the right
feature bits
RH-Author: Thomas Huth <thuth@redhat.com>
RH-MergeRequest: 106: pc-bios/s390-ccw: Fix boot from disks with 4k sectors that do not have the typical DASD geometry
RH-Commit: [9/10] 9dcd8c2f659f366f9487ab6473d1f0d7778b40a7 (thuth/qemu-kvm-cs9)
RH-Bugzilla: 2098077
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
Bugzilla: http://bugzilla.redhat.com/2098077
commit 9125a314cca4a1838b09305a87d8efb98f80ab67
Author: Thomas Huth <thuth@redhat.com>
Date: Mon Jul 4 13:19:01 2022 +0200
pc-bios/s390-ccw/virtio-blkdev: Request the right feature bits
The virtio-blk code uses the block size and geometry fields in the
config area. According to the virtio-spec, these have to be negotiated
with the right feature bits during initialization, otherwise they
might not be available. QEMU is so far very forgiving and always
provides them, but we should not rely on this behavior, so let's
better request them properly via the VIRTIO_BLK_F_GEOMETRY and
VIRTIO_BLK_F_BLK_SIZE feature bits.
Message-Id: <20220704111903.62400-11-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/virtio-blkdev.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/pc-bios/s390-ccw/virtio-blkdev.c b/pc-bios/s390-ccw/virtio-blkdev.c
index c175b66a47..8271c47296 100644
--- a/pc-bios/s390-ccw/virtio-blkdev.c
+++ b/pc-bios/s390-ccw/virtio-blkdev.c
@@ -13,6 +13,9 @@
#include "virtio.h"
#include "virtio-scsi.h"
+#define VIRTIO_BLK_F_GEOMETRY (1 << 4)
+#define VIRTIO_BLK_F_BLK_SIZE (1 << 6)
+
static int virtio_blk_read_many(VDev *vdev, ulong sector, void *load_addr,
int sec_num)
{
@@ -223,6 +226,7 @@ int virtio_blk_setup_device(SubChannelId schid)
{
VDev *vdev = virtio_get_device();
+ vdev->guest_features[0] = VIRTIO_BLK_F_GEOMETRY | VIRTIO_BLK_F_BLK_SIZE;
vdev->schid = schid;
virtio_setup_ccw(vdev);
--
2.31.1

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@ -0,0 +1,124 @@
From f07e4629a7c58407f903810a038660c88c6a6315 Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Fri, 8 Jul 2022 20:49:01 +0200
Subject: [PATCH 08/17] pc-bios/s390-ccw/virtio-blkdev: Simplify/fix
virtio_ipl_disk_is_valid()
RH-Author: Thomas Huth <thuth@redhat.com>
RH-MergeRequest: 106: pc-bios/s390-ccw: Fix boot from disks with 4k sectors that do not have the typical DASD geometry
RH-Commit: [3/10] fb06830a3e50d9da3d84913b50bb227865cc44b3 (thuth/qemu-kvm-cs9)
RH-Bugzilla: 2098077
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
Bugzilla: http://bugzilla.redhat.com/2098077
commit bbf615f7b707f009ef8e757d170902ad33b90644
Author: Thomas Huth <thuth@redhat.com>
Date: Mon Jul 4 13:18:55 2022 +0200
pc-bios/s390-ccw/virtio-blkdev: Simplify/fix virtio_ipl_disk_is_valid()
The s390-ccw bios fails to boot if the boot disk is a virtio-blk
disk with a sector size of 4096. For example:
dasdfmt -b 4096 -d cdl -y -p -M quick /dev/dasdX
fdasd -a /dev/dasdX
install a guest onto /dev/dasdX1 using virtio-blk
qemu-system-s390x -nographic -hda /dev/dasdX1
The bios then bails out with:
! Cannot read block 0 !
Looking at virtio_ipl_disk_is_valid() and especially the function
virtio_disk_is_scsi(), it does not really make sense that we expect
only such a limited disk geometry (like a block size of 512) for
our boot disks. Let's relax the check and allow everything that
remotely looks like a sane disk.
Message-Id: <20220704111903.62400-5-thuth@redhat.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
pc-bios/s390-ccw/virtio-blkdev.c | 41 ++++++--------------------------
pc-bios/s390-ccw/virtio.h | 2 --
2 files changed, 7 insertions(+), 36 deletions(-)
diff --git a/pc-bios/s390-ccw/virtio-blkdev.c b/pc-bios/s390-ccw/virtio-blkdev.c
index 6483307630..7e13155589 100644
--- a/pc-bios/s390-ccw/virtio-blkdev.c
+++ b/pc-bios/s390-ccw/virtio-blkdev.c
@@ -166,46 +166,19 @@ void virtio_assume_eckd(void)
virtio_eckd_sectors_for_block_size(vdev->config.blk.blk_size);
}
-bool virtio_disk_is_scsi(void)
-{
- VDev *vdev = virtio_get_device();
-
- if (vdev->guessed_disk_nature == VIRTIO_GDN_SCSI) {
- return true;
- }
- switch (vdev->senseid.cu_model) {
- case VIRTIO_ID_BLOCK:
- return (vdev->config.blk.geometry.heads == 255)
- && (vdev->config.blk.geometry.sectors == 63)
- && (virtio_get_block_size() == VIRTIO_SCSI_BLOCK_SIZE);
- case VIRTIO_ID_SCSI:
- return true;
- }
- return false;
-}
-
-bool virtio_disk_is_eckd(void)
+bool virtio_ipl_disk_is_valid(void)
{
+ int blksize = virtio_get_block_size();
VDev *vdev = virtio_get_device();
- const int block_size = virtio_get_block_size();
- if (vdev->guessed_disk_nature == VIRTIO_GDN_DASD) {
+ if (vdev->guessed_disk_nature == VIRTIO_GDN_SCSI ||
+ vdev->guessed_disk_nature == VIRTIO_GDN_DASD) {
return true;
}
- switch (vdev->senseid.cu_model) {
- case VIRTIO_ID_BLOCK:
- return (vdev->config.blk.geometry.heads == 15)
- && (vdev->config.blk.geometry.sectors ==
- virtio_eckd_sectors_for_block_size(block_size));
- case VIRTIO_ID_SCSI:
- return false;
- }
- return false;
-}
-bool virtio_ipl_disk_is_valid(void)
-{
- return virtio_disk_is_scsi() || virtio_disk_is_eckd();
+ return (vdev->senseid.cu_model == VIRTIO_ID_BLOCK ||
+ vdev->senseid.cu_model == VIRTIO_ID_SCSI) &&
+ blksize >= 512 && blksize <= 4096;
}
int virtio_get_block_size(void)
diff --git a/pc-bios/s390-ccw/virtio.h b/pc-bios/s390-ccw/virtio.h
index 9e410bde6f..241730effe 100644
--- a/pc-bios/s390-ccw/virtio.h
+++ b/pc-bios/s390-ccw/virtio.h
@@ -186,8 +186,6 @@ void virtio_assume_scsi(void);
void virtio_assume_eckd(void);
void virtio_assume_iso9660(void);
-extern bool virtio_disk_is_scsi(void);
-extern bool virtio_disk_is_eckd(void);
extern bool virtio_ipl_disk_is_valid(void);
extern int virtio_get_block_size(void);
extern uint8_t virtio_get_heads(void);
--
2.31.1

119
kvm-tests-qtest-fdc-test-Add-a-regression-test-for-CVE-2.patch Normal file
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@ -0,0 +1,119 @@
From cea7b15c613a11ea15a1458d6990be7044df6643 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= <philmd@redhat.com>
Date: Thu, 18 Nov 2021 12:57:33 +0100
Subject: [PATCH 17/17] tests/qtest/fdc-test: Add a regression test for
CVE-2021-3507
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Jon Maloy <jmaloy@redhat.com>
RH-MergeRequest: 107: hw/block/fdc: Prevent end-of-track overrun (CVE-2021-3507)
RH-Commit: [2/2] 067c052df790959c28c1fcc16547676d36523bd9 (mrezanin/centos-src-qemu-kvm)
RH-Bugzilla: 1951522
RH-Acked-by: Hanna Reitz <hreitz@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
Add the reproducer from https://gitlab.com/qemu-project/qemu/-/issues/339
Without the previous commit, when running 'make check-qtest-i386'
with QEMU configured with '--enable-sanitizers' we get:
==4028352==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x619000062a00 at pc 0x5626d03c491a bp 0x7ffdb4199410 sp 0x7ffdb4198bc0
READ of size 786432 at 0x619000062a00 thread T0
#0 0x5626d03c4919 in __asan_memcpy (qemu-system-i386+0x1e65919)
#1 0x5626d1c023cc in flatview_write_continue softmmu/physmem.c:2787:13
#2 0x5626d1bf0c0f in flatview_write softmmu/physmem.c:2822:14
#3 0x5626d1bf0798 in address_space_write softmmu/physmem.c:2914:18
#4 0x5626d1bf0f37 in address_space_rw softmmu/physmem.c:2924:16
#5 0x5626d1bf14c8 in cpu_physical_memory_rw softmmu/physmem.c:2933:5
#6 0x5626d0bd5649 in cpu_physical_memory_write include/exec/cpu-common.h:82:5
#7 0x5626d0bd0a07 in i8257_dma_write_memory hw/dma/i8257.c:452:9
#8 0x5626d09f825d in fdctrl_transfer_handler hw/block/fdc.c:1616:13
#9 0x5626d0a048b4 in fdctrl_start_transfer hw/block/fdc.c:1539:13
#10 0x5626d09f4c3e in fdctrl_write_data hw/block/fdc.c:2266:13
#11 0x5626d09f22f7 in fdctrl_write hw/block/fdc.c:829:9
#12 0x5626d1c20bc5 in portio_write softmmu/ioport.c:207:17
0x619000062a00 is located 0 bytes to the right of 512-byte region [0x619000062800,0x619000062a00)
allocated by thread T0 here:
#0 0x5626d03c66ec in posix_memalign (qemu-system-i386+0x1e676ec)
#1 0x5626d2b988d4 in qemu_try_memalign util/oslib-posix.c:210:11
#2 0x5626d2b98b0c in qemu_memalign util/oslib-posix.c:226:27
#3 0x5626d09fbaf0 in fdctrl_realize_common hw/block/fdc.c:2341:20
#4 0x5626d0a150ed in isabus_fdc_realize hw/block/fdc-isa.c:113:5
#5 0x5626d2367935 in device_set_realized hw/core/qdev.c:531:13
SUMMARY: AddressSanitizer: heap-buffer-overflow (qemu-system-i386+0x1e65919) in __asan_memcpy
Shadow bytes around the buggy address:
0x0c32800044f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c3280004500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c3280004510: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c3280004520: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c3280004530: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c3280004540:[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c3280004550: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c3280004560: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c3280004570: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c3280004580: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c3280004590: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Heap left redzone: fa
Freed heap region: fd
==4028352==ABORTING
[ kwolf: Added snapshot=on to prevent write file lock failure ]
Reported-by: Alexander Bulekov <alxndr@bu.edu>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alexander Bulekov <alxndr@bu.edu>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit 46609b90d9e3a6304def11038a76b58ff43f77bc)
Signed-off-by: Jon Maloy <jmaloy@redhat.com>
---
tests/qtest/fdc-test.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/tests/qtest/fdc-test.c b/tests/qtest/fdc-test.c
index b0d40012e6..1d4f852128 100644
--- a/tests/qtest/fdc-test.c
+++ b/tests/qtest/fdc-test.c
@@ -583,6 +583,26 @@ static void test_cve_2021_20196(void)
qtest_quit(s);
}
+static void test_cve_2021_3507(void)
+{
+ QTestState *s;
+
+ s = qtest_initf("-nographic -m 32M -nodefaults "
+ "-drive file=%s,format=raw,if=floppy,snapshot=on",
+ test_image);
+ qtest_outl(s, 0x9, 0x0a0206);
+ qtest_outw(s, 0x3f4, 0x1600);
+ qtest_outw(s, 0x3f4, 0x0000);
+ qtest_outw(s, 0x3f4, 0x0000);
+ qtest_outw(s, 0x3f4, 0x0000);
+ qtest_outw(s, 0x3f4, 0x0200);
+ qtest_outw(s, 0x3f4, 0x0200);
+ qtest_outw(s, 0x3f4, 0x0000);
+ qtest_outw(s, 0x3f4, 0x0000);
+ qtest_outw(s, 0x3f4, 0x0000);
+ qtest_quit(s);
+}
+
int main(int argc, char **argv)
{
int fd;
@@ -614,6 +634,7 @@ int main(int argc, char **argv)
qtest_add_func("/fdc/read_no_dma_19", test_read_no_dma_19);
qtest_add_func("/fdc/fuzz-registers", fuzz_registers);
qtest_add_func("/fdc/fuzz/cve_2021_20196", test_cve_2021_20196);
+ qtest_add_func("/fdc/fuzz/cve_2021_3507", test_cve_2021_3507);
ret = g_test_run();
--
2.31.1

46
kvm-virtio-iommu-Add-an-assert-check-in-translate-routin.patch Normal file
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@ -0,0 +1,46 @@
From 643d9c28ff8b15c333cc748c5e712659ad2a257c Mon Sep 17 00:00:00 2001
From: Zhenzhong Duan <zhenzhong.duan@intel.com>
Date: Mon, 13 Jun 2022 14:10:10 +0800
Subject: [PATCH 03/17] virtio-iommu: Add an assert check in translate routine
RH-Author: Eric Auger <eric.auger@redhat.com>
RH-MergeRequest: 105: virtio-iommu: Fix bypass mode for assigned devices
RH-Commit: [3/5] 19f309fd0beda40d65f51c454e37936658ac9f38 (eauger1/centos-qemu-kvm)
RH-Bugzilla: 2100106
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: Peter Xu <peterx@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2100106
With address space switch supported, dma access translation only
happen after endpoint is attached to a non-bypass domain.
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Message-Id: <20220613061010.2674054-4-zhenzhong.duan@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 23b5f0ff6d923d3bca11cf44eed3daf7a0a836a8)
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
hw/virtio/virtio-iommu.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c
index 440a1c28a7..e970d4d5a6 100644
--- a/hw/virtio/virtio-iommu.c
+++ b/hw/virtio/virtio-iommu.c
@@ -866,6 +866,10 @@ static IOMMUTLBEntry virtio_iommu_translate(IOMMUMemoryRegion *mr, hwaddr addr,
qemu_rec_mutex_lock(&s->mutex);
ep = g_tree_lookup(s->endpoints, GUINT_TO_POINTER(sid));
+
+ if (bypass_allowed)
+ assert(ep && ep->domain && !ep->domain->bypass);
+
if (!ep) {
if (!bypass_allowed) {
error_report_once("%s sid=%d is not known!!", __func__, sid);
--
2.31.1

250
kvm-virtio-iommu-Add-bypass-mode-support-to-assigned-dev.patch Normal file
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@ -0,0 +1,250 @@
From d60774ee3168eefb21a4120a38107cd36ae17e07 Mon Sep 17 00:00:00 2001
From: Zhenzhong Duan <zhenzhong.duan@intel.com>
Date: Mon, 13 Jun 2022 14:10:08 +0800
Subject: [PATCH 01/17] virtio-iommu: Add bypass mode support to assigned
device
RH-Author: Eric Auger <eric.auger@redhat.com>
RH-MergeRequest: 105: virtio-iommu: Fix bypass mode for assigned devices
RH-Commit: [1/5] 4777815533b31c7f4f09af8902e378fd3fc1186a (eauger1/centos-qemu-kvm)
RH-Bugzilla: 2100106
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: Peter Xu <peterx@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2100106
Currently assigned devices can not work in virtio-iommu bypass mode.
Guest driver fails to probe the device due to DMA failure. And the
reason is because of lacking GPA -> HPA mappings when VM is created.
Add a root container memory region to hold both bypass memory region
and iommu memory region, so the switch between them is supported
just like the implementation in virtual VT-d.
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Message-Id: <20220613061010.2674054-2-zhenzhong.duan@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 90519b90539b16258d1d52b908b199f44877dc18)
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
hw/virtio/trace-events | 1 +
hw/virtio/virtio-iommu.c | 115 ++++++++++++++++++++++++++++++-
include/hw/virtio/virtio-iommu.h | 2 +
3 files changed, 116 insertions(+), 2 deletions(-)
diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events
index a5102eac9e..2ab5881b88 100644
--- a/hw/virtio/trace-events
+++ b/hw/virtio/trace-events
@@ -114,6 +114,7 @@ virtio_iommu_remap(const char *name, uint64_t virt_start, uint64_t virt_end, uin
virtio_iommu_set_page_size_mask(const char *name, uint64_t old, uint64_t new) "mr=%s old_mask=0x%"PRIx64" new_mask=0x%"PRIx64
virtio_iommu_notify_flag_add(const char *name) "add notifier to mr %s"
virtio_iommu_notify_flag_del(const char *name) "del notifier from mr %s"
+virtio_iommu_switch_address_space(uint8_t bus, uint8_t slot, uint8_t fn, bool on) "Device %02x:%02x.%x switching address space (iommu enabled=%d)"
# virtio-mem.c
virtio_mem_send_response(uint16_t type) "type=%" PRIu16
diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c
index 6d5ea0bdf1..5e99e6c62b 100644
--- a/hw/virtio/virtio-iommu.c
+++ b/hw/virtio/virtio-iommu.c
@@ -70,6 +70,77 @@ static inline uint16_t virtio_iommu_get_bdf(IOMMUDevice *dev)
return PCI_BUILD_BDF(pci_bus_num(dev->bus), dev->devfn);
}
+static bool virtio_iommu_device_bypassed(IOMMUDevice *sdev)
+{
+ uint32_t sid;
+ bool bypassed;
+ VirtIOIOMMU *s = sdev->viommu;
+ VirtIOIOMMUEndpoint *ep;
+
+ sid = virtio_iommu_get_bdf(sdev);
+
+ qemu_mutex_lock(&s->mutex);
+ /* need to check bypass before system reset */
+ if (!s->endpoints) {
+ bypassed = s->config.bypass;
+ goto unlock;
+ }
+
+ ep = g_tree_lookup(s->endpoints, GUINT_TO_POINTER(sid));
+ if (!ep || !ep->domain) {
+ bypassed = s->config.bypass;
+ } else {
+ bypassed = ep->domain->bypass;
+ }
+
+unlock:
+ qemu_mutex_unlock(&s->mutex);
+ return bypassed;
+}
+
+/* Return whether the device is using IOMMU translation. */
+static bool virtio_iommu_switch_address_space(IOMMUDevice *sdev)
+{
+ bool use_remapping;
+
+ assert(sdev);
+
+ use_remapping = !virtio_iommu_device_bypassed(sdev);
+
+ trace_virtio_iommu_switch_address_space(pci_bus_num(sdev->bus),
+ PCI_SLOT(sdev->devfn),
+ PCI_FUNC(sdev->devfn),
+ use_remapping);
+
+ /* Turn off first then on the other */
+ if (use_remapping) {
+ memory_region_set_enabled(&sdev->bypass_mr, false);
+ memory_region_set_enabled(MEMORY_REGION(&sdev->iommu_mr), true);
+ } else {
+ memory_region_set_enabled(MEMORY_REGION(&sdev->iommu_mr), false);
+ memory_region_set_enabled(&sdev->bypass_mr, true);
+ }
+
+ return use_remapping;
+}
+
+static void virtio_iommu_switch_address_space_all(VirtIOIOMMU *s)
+{
+ GHashTableIter iter;
+ IOMMUPciBus *iommu_pci_bus;
+ int i;
+
+ g_hash_table_iter_init(&iter, s->as_by_busptr);
+ while (g_hash_table_iter_next(&iter, NULL, (void **)&iommu_pci_bus)) {
+ for (i = 0; i < PCI_DEVFN_MAX; i++) {
+ if (!iommu_pci_bus->pbdev[i]) {
+ continue;
+ }
+ virtio_iommu_switch_address_space(iommu_pci_bus->pbdev[i]);
+ }
+ }
+}
+
/**
* The bus number is used for lookup when SID based operations occur.
* In that case we lazily populate the IOMMUPciBus array from the bus hash
@@ -214,6 +285,7 @@ static gboolean virtio_iommu_notify_map_cb(gpointer key, gpointer value,
static void virtio_iommu_detach_endpoint_from_domain(VirtIOIOMMUEndpoint *ep)
{
VirtIOIOMMUDomain *domain = ep->domain;
+ IOMMUDevice *sdev = container_of(ep->iommu_mr, IOMMUDevice, iommu_mr);
if (!ep->domain) {
return;
@@ -222,6 +294,7 @@ static void virtio_iommu_detach_endpoint_from_domain(VirtIOIOMMUEndpoint *ep)
ep->iommu_mr);
QLIST_REMOVE(ep, next);
ep->domain = NULL;
+ virtio_iommu_switch_address_space(sdev);
}
static VirtIOIOMMUEndpoint *virtio_iommu_get_endpoint(VirtIOIOMMU *s,
@@ -324,12 +397,39 @@ static AddressSpace *virtio_iommu_find_add_as(PCIBus *bus, void *opaque,
trace_virtio_iommu_init_iommu_mr(name);
+ memory_region_init(&sdev->root, OBJECT(s), name, UINT64_MAX);
+ address_space_init(&sdev->as, &sdev->root, TYPE_VIRTIO_IOMMU);
+
+ /*
+ * Build the IOMMU disabled container with aliases to the
+ * shared MRs. Note that aliasing to a shared memory region
+ * could help the memory API to detect same FlatViews so we
+ * can have devices to share the same FlatView when in bypass
+ * mode. (either by not configuring virtio-iommu driver or with
+ * "iommu=pt"). It will greatly reduce the total number of
+ * FlatViews of the system hence VM runs faster.
+ */
+ memory_region_init_alias(&sdev->bypass_mr, OBJECT(s),
+ "system", get_system_memory(), 0,
+ memory_region_size(get_system_memory()));
+
memory_region_init_iommu(&sdev->iommu_mr, sizeof(sdev->iommu_mr),
TYPE_VIRTIO_IOMMU_MEMORY_REGION,
OBJECT(s), name,
UINT64_MAX);
- address_space_init(&sdev->as,
- MEMORY_REGION(&sdev->iommu_mr), TYPE_VIRTIO_IOMMU);
+
+ /*
+ * Hook both the containers under the root container, we
+ * switch between iommu & bypass MRs by enable/disable
+ * corresponding sub-containers
+ */
+ memory_region_add_subregion_overlap(&sdev->root, 0,
+ MEMORY_REGION(&sdev->iommu_mr),
+ 0);
+ memory_region_add_subregion_overlap(&sdev->root, 0,
+ &sdev->bypass_mr, 0);
+
+ virtio_iommu_switch_address_space(sdev);
g_free(name);
}
return &sdev->as;
@@ -343,6 +443,7 @@ static int virtio_iommu_attach(VirtIOIOMMU *s,
uint32_t flags = le32_to_cpu(req->flags);
VirtIOIOMMUDomain *domain;
VirtIOIOMMUEndpoint *ep;
+ IOMMUDevice *sdev;
trace_virtio_iommu_attach(domain_id, ep_id);
@@ -376,6 +477,8 @@ static int virtio_iommu_attach(VirtIOIOMMU *s,
QLIST_INSERT_HEAD(&domain->endpoint_list, ep, next);
ep->domain = domain;
+ sdev = container_of(ep->iommu_mr, IOMMUDevice, iommu_mr);
+ virtio_iommu_switch_address_space(sdev);
/* Replay domain mappings on the associated memory region */
g_tree_foreach(domain->mappings, virtio_iommu_notify_map_cb,
@@ -888,6 +991,7 @@ static void virtio_iommu_set_config(VirtIODevice *vdev,
return;
}
dev_config->bypass = in_config->bypass;
+ virtio_iommu_switch_address_space_all(dev);
}
trace_virtio_iommu_set_config(in_config->bypass);
@@ -1027,6 +1131,8 @@ static void virtio_iommu_system_reset(void *opaque)
* system reset
*/
s->config.bypass = s->boot_bypass;
+ virtio_iommu_switch_address_space_all(s);
+
}
static void virtio_iommu_device_realize(DeviceState *dev, Error **errp)
@@ -1043,6 +1149,11 @@ static void virtio_iommu_device_realize(DeviceState *dev, Error **errp)
virtio_iommu_handle_command);
s->event_vq = virtio_add_queue(vdev, VIOMMU_DEFAULT_QUEUE_SIZE, NULL);
+ /*
+ * config.bypass is needed to get initial address space early, such as
+ * in vfio realize
+ */
+ s->config.bypass = s->boot_bypass;
s->config.page_size_mask = TARGET_PAGE_MASK;
s->config.input_range.end = UINT64_MAX;
s->config.domain_range.end = UINT32_MAX;
diff --git a/include/hw/virtio/virtio-iommu.h b/include/hw/virtio/virtio-iommu.h
index 84391f8448..102eeefa73 100644
--- a/include/hw/virtio/virtio-iommu.h
+++ b/include/hw/virtio/virtio-iommu.h
@@ -37,6 +37,8 @@ typedef struct IOMMUDevice {
int devfn;
IOMMUMemoryRegion iommu_mr;
AddressSpace as;
+ MemoryRegion root; /* The root container of the device */
+ MemoryRegion bypass_mr; /* The alias of shared memory MR */
} IOMMUDevice;
typedef struct IOMMUPciBus {
--
2.31.1

54
kvm-virtio-iommu-Fix-migration-regression.patch Normal file
View File

@ -0,0 +1,54 @@
From 8d45902b4884315ec090e607e9f03606b21001cf Mon Sep 17 00:00:00 2001
From: Zhenzhong Duan <zhenzhong.duan@intel.com>
Date: Fri, 24 Jun 2022 17:37:40 +0800
Subject: [PATCH 05/17] virtio-iommu: Fix migration regression
RH-Author: Eric Auger <eric.auger@redhat.com>
RH-MergeRequest: 105: virtio-iommu: Fix bypass mode for assigned devices
RH-Commit: [5/5] 9652c4aaaf88e24083fab1fbc3d1423260c93ca6 (eauger1/centos-qemu-kvm)
RH-Bugzilla: 2100106
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: Peter Xu <peterx@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2100106
We also need to switch to the right address space on dest side
after loading the device status. DMA to wrong address space is
destructive.
Fixes: 3facd774962fd ("virtio-iommu: Add bypass mode support to assigned device")
Suggested-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Message-Id: <20220624093740.3525267-1-zhenzhong.duan@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
(cherry picked from commit d355566bd958e24e7e384da6ea89a9fc88d7bfed)
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
hw/virtio/virtio-iommu.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c
index 44a041dec9..2012835554 100644
--- a/hw/virtio/virtio-iommu.c
+++ b/hw/virtio/virtio-iommu.c
@@ -1324,6 +1324,14 @@ static int iommu_post_load(void *opaque, int version_id)
VirtIOIOMMU *s = opaque;
g_tree_foreach(s->domains, reconstruct_endpoints, s);
+
+ /*
+ * Memory regions are dynamically turned on/off depending on
+ * 'config.bypass' and attached domain type if there is. After
+ * migration, we need to make sure the memory regions are
+ * still correct.
+ */
+ virtio_iommu_switch_address_space_all(s);
return 0;
}
--
2.31.1

67
kvm-virtio-iommu-Fix-the-partial-copy-of-probe-request.patch Normal file
View File

@ -0,0 +1,67 @@
From b681247c29b59af40c86f8f0ae5709138ae9bf1a Mon Sep 17 00:00:00 2001
From: Zhenzhong Duan <zhenzhong.duan@intel.com>
Date: Thu, 23 Jun 2022 10:31:52 +0800
Subject: [PATCH 04/17] virtio-iommu: Fix the partial copy of probe request
RH-Author: Eric Auger <eric.auger@redhat.com>
RH-MergeRequest: 105: virtio-iommu: Fix bypass mode for assigned devices
RH-Commit: [4/5] c402164414a8e69bbb6df20af3c2b6d2589d6f3e (eauger1/centos-qemu-kvm)
RH-Bugzilla: 2100106
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: Peter Xu <peterx@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2100106
The structure of probe request doesn't include the tail, this leads
to a few field missed to be copied. Currently this isn't an issue as
those missed field belong to reserved field, just in case reserved
field will be used in the future.
Changed 4th parameter of virtio_iommu_iov_to_req() to receive size
of device-readable part.
Fixes: 1733eebb9e75b ("virtio-iommu: Implement RESV_MEM probe request")
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Message-Id: <20220623023152.3473231-1-zhenzhong.duan@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
(cherry picked from commit 45461aace83d961e933b27519b81d17b4c690514)
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
hw/virtio/virtio-iommu.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c
index e970d4d5a6..44a041dec9 100644
--- a/hw/virtio/virtio-iommu.c
+++ b/hw/virtio/virtio-iommu.c
@@ -676,11 +676,10 @@ static int virtio_iommu_probe(VirtIOIOMMU *s,
static int virtio_iommu_iov_to_req(struct iovec *iov,
unsigned int iov_cnt,
- void *req, size_t req_sz)
+ void *req, size_t payload_sz)
{
- size_t sz, payload_sz = req_sz - sizeof(struct virtio_iommu_req_tail);
+ size_t sz = iov_to_buf(iov, iov_cnt, 0, req, payload_sz);
- sz = iov_to_buf(iov, iov_cnt, 0, req, payload_sz);
if (unlikely(sz != payload_sz)) {
return VIRTIO_IOMMU_S_INVAL;
}
@@ -693,7 +692,8 @@ static int virtio_iommu_handle_ ## __req(VirtIOIOMMU *s, \
unsigned int iov_cnt) \
{ \
struct virtio_iommu_req_ ## __req req; \
- int ret = virtio_iommu_iov_to_req(iov, iov_cnt, &req, sizeof(req)); \
+ int ret = virtio_iommu_iov_to_req(iov, iov_cnt, &req, \
+ sizeof(req) - sizeof(struct virtio_iommu_req_tail));\
\
return ret ? ret : virtio_iommu_ ## __req(s, &req); \
}
--
2.31.1

141
kvm-virtio-iommu-Use-recursive-lock-to-avoid-deadlock.patch Normal file
View File

@ -0,0 +1,141 @@
From 881c999e302e7ee1212b47c523a2cf442c549417 Mon Sep 17 00:00:00 2001
From: Zhenzhong Duan <zhenzhong.duan@intel.com>
Date: Mon, 13 Jun 2022 14:10:09 +0800
Subject: [PATCH 02/17] virtio-iommu: Use recursive lock to avoid deadlock
RH-Author: Eric Auger <eric.auger@redhat.com>
RH-MergeRequest: 105: virtio-iommu: Fix bypass mode for assigned devices
RH-Commit: [2/5] 67dce1eecb49555f728f119f8efac00417ff65bf (eauger1/centos-qemu-kvm)
RH-Bugzilla: 2100106
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: Peter Xu <peterx@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2100106
When switching address space with mutex lock hold, mapping will be
replayed for assigned device. This will trigger relock deadlock.
Also release the mutex resource in unrealize routine.
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Message-Id: <20220613061010.2674054-3-zhenzhong.duan@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 08f2030a2e46f1e93d186b3a683e5caef1df562b)
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
hw/virtio/virtio-iommu.c | 20 +++++++++++---------
include/hw/virtio/virtio-iommu.h | 2 +-
2 files changed, 12 insertions(+), 10 deletions(-)
diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c
index 5e99e6c62b..440a1c28a7 100644
--- a/hw/virtio/virtio-iommu.c
+++ b/hw/virtio/virtio-iommu.c
@@ -79,7 +79,7 @@ static bool virtio_iommu_device_bypassed(IOMMUDevice *sdev)
sid = virtio_iommu_get_bdf(sdev);
- qemu_mutex_lock(&s->mutex);
+ qemu_rec_mutex_lock(&s->mutex);
/* need to check bypass before system reset */
if (!s->endpoints) {
bypassed = s->config.bypass;
@@ -94,7 +94,7 @@ static bool virtio_iommu_device_bypassed(IOMMUDevice *sdev)
}
unlock:
- qemu_mutex_unlock(&s->mutex);
+ qemu_rec_mutex_unlock(&s->mutex);
return bypassed;
}
@@ -746,7 +746,7 @@ static void virtio_iommu_handle_command(VirtIODevice *vdev, VirtQueue *vq)
tail.status = VIRTIO_IOMMU_S_DEVERR;
goto out;
}
- qemu_mutex_lock(&s->mutex);
+ qemu_rec_mutex_lock(&s->mutex);
switch (head.type) {
case VIRTIO_IOMMU_T_ATTACH:
tail.status = virtio_iommu_handle_attach(s, iov, iov_cnt);
@@ -775,7 +775,7 @@ static void virtio_iommu_handle_command(VirtIODevice *vdev, VirtQueue *vq)
default:
tail.status = VIRTIO_IOMMU_S_UNSUPP;
}
- qemu_mutex_unlock(&s->mutex);
+ qemu_rec_mutex_unlock(&s->mutex);
out:
sz = iov_from_buf(elem->in_sg, elem->in_num, 0,
@@ -863,7 +863,7 @@ static IOMMUTLBEntry virtio_iommu_translate(IOMMUMemoryRegion *mr, hwaddr addr,
sid = virtio_iommu_get_bdf(sdev);
trace_virtio_iommu_translate(mr->parent_obj.name, sid, addr, flag);
- qemu_mutex_lock(&s->mutex);
+ qemu_rec_mutex_lock(&s->mutex);
ep = g_tree_lookup(s->endpoints, GUINT_TO_POINTER(sid));
if (!ep) {
@@ -947,7 +947,7 @@ static IOMMUTLBEntry virtio_iommu_translate(IOMMUMemoryRegion *mr, hwaddr addr,
trace_virtio_iommu_translate_out(addr, entry.translated_addr, sid);
unlock:
- qemu_mutex_unlock(&s->mutex);
+ qemu_rec_mutex_unlock(&s->mutex);
return entry;
}
@@ -1036,7 +1036,7 @@ static void virtio_iommu_replay(IOMMUMemoryRegion *mr, IOMMUNotifier *n)
sid = virtio_iommu_get_bdf(sdev);
- qemu_mutex_lock(&s->mutex);
+ qemu_rec_mutex_lock(&s->mutex);
if (!s->endpoints) {
goto unlock;
@@ -1050,7 +1050,7 @@ static void virtio_iommu_replay(IOMMUMemoryRegion *mr, IOMMUNotifier *n)
g_tree_foreach(ep->domain->mappings, virtio_iommu_remap, mr);
unlock:
- qemu_mutex_unlock(&s->mutex);
+ qemu_rec_mutex_unlock(&s->mutex);
}
static int virtio_iommu_notify_flag_changed(IOMMUMemoryRegion *iommu_mr,
@@ -1169,7 +1169,7 @@ static void virtio_iommu_device_realize(DeviceState *dev, Error **errp)
virtio_add_feature(&s->features, VIRTIO_IOMMU_F_PROBE);
virtio_add_feature(&s->features, VIRTIO_IOMMU_F_BYPASS_CONFIG);
- qemu_mutex_init(&s->mutex);
+ qemu_rec_mutex_init(&s->mutex);
s->as_by_busptr = g_hash_table_new_full(NULL, NULL, NULL, g_free);
@@ -1197,6 +1197,8 @@ static void virtio_iommu_device_unrealize(DeviceState *dev)
g_tree_destroy(s->endpoints);
}
+ qemu_rec_mutex_destroy(&s->mutex);
+
virtio_delete_queue(s->req_vq);
virtio_delete_queue(s->event_vq);
virtio_cleanup(vdev);
diff --git a/include/hw/virtio/virtio-iommu.h b/include/hw/virtio/virtio-iommu.h
index 102eeefa73..2ad5ee320b 100644
--- a/include/hw/virtio/virtio-iommu.h
+++ b/include/hw/virtio/virtio-iommu.h
@@ -58,7 +58,7 @@ struct VirtIOIOMMU {
ReservedRegion *reserved_regions;
uint32_t nb_reserved_regions;
GTree *domains;
- QemuMutex mutex;
+ QemuRecMutex mutex;
GTree *endpoints;
bool boot_bypass;
};
--
2.31.1

61
qemu-kvm.spec
View File

@ -151,7 +151,7 @@ Obsoletes: %{name}-block-ssh <= %{epoch}:%{version} \
Summary: QEMU is a machine emulator and virtualizer
Name: qemu-kvm
Version: 7.0.0
Release: 8%{?rcrel}%{?dist}%{?cc_suffix}
Release: 9%{?rcrel}%{?dist}%{?cc_suffix}
# Epoch because we pushed a qemu-1.0 package. AIUI this can't ever be dropped
# Epoch 15 used for RHEL 8
# Epoch 17 used for RHEL 9 (due to release versioning offset in RHEL 8.5)
@ -324,6 +324,40 @@ Patch84: kvm-QIOChannelSocket-Fix-zero-copy-send-so-socket-flush-.patch
Patch85: kvm-migration-Change-zero_copy_send-from-migration-param.patch
# For bz#2096143 - The migration port is not released if use it again for recovering postcopy migration
Patch86: kvm-migration-Allow-migrate-recover-to-run-multiple-time.patch
# For bz#2100106 - Fix virtio-iommu/vfio bypass
Patch87: kvm-virtio-iommu-Add-bypass-mode-support-to-assigned-dev.patch
# For bz#2100106 - Fix virtio-iommu/vfio bypass
Patch88: kvm-virtio-iommu-Use-recursive-lock-to-avoid-deadlock.patch
# For bz#2100106 - Fix virtio-iommu/vfio bypass
Patch89: kvm-virtio-iommu-Add-an-assert-check-in-translate-routin.patch
# For bz#2100106 - Fix virtio-iommu/vfio bypass
Patch90: kvm-virtio-iommu-Fix-the-partial-copy-of-probe-request.patch
# For bz#2100106 - Fix virtio-iommu/vfio bypass
Patch91: kvm-virtio-iommu-Fix-migration-regression.patch
# For bz#2098077 - virtio-blk: Can't boot fresh installation from used virtio-blk dasd disk under certain conditions
Patch92: kvm-pc-bios-s390-ccw-virtio-Introduce-a-macro-for-the-DA.patch
# For bz#2098077 - virtio-blk: Can't boot fresh installation from used virtio-blk dasd disk under certain conditions
Patch93: kvm-pc-bios-s390-ccw-bootmap-Improve-the-guessing-logic-.patch
# For bz#2098077 - virtio-blk: Can't boot fresh installation from used virtio-blk dasd disk under certain conditions
Patch94: kvm-pc-bios-s390-ccw-virtio-blkdev-Simplify-fix-virtio_i.patch
# For bz#2098077 - virtio-blk: Can't boot fresh installation from used virtio-blk dasd disk under certain conditions
Patch95: kvm-pc-bios-s390-ccw-virtio-blkdev-Remove-virtio_assume_.patch
# For bz#2098077 - virtio-blk: Can't boot fresh installation from used virtio-blk dasd disk under certain conditions
Patch96: kvm-pc-bios-s390-ccw-virtio-Set-missing-status-bits-whil.patch
# For bz#2098077 - virtio-blk: Can't boot fresh installation from used virtio-blk dasd disk under certain conditions
Patch97: kvm-pc-bios-s390-ccw-virtio-Read-device-config-after-fea.patch
# For bz#2098077 - virtio-blk: Can't boot fresh installation from used virtio-blk dasd disk under certain conditions
Patch98: kvm-pc-bios-s390-ccw-virtio-Beautify-the-code-for-readin.patch
# For bz#2098077 - virtio-blk: Can't boot fresh installation from used virtio-blk dasd disk under certain conditions
Patch99: kvm-pc-bios-s390-ccw-Split-virtio-scsi-code-from-virtio_.patch
# For bz#2098077 - virtio-blk: Can't boot fresh installation from used virtio-blk dasd disk under certain conditions
Patch100: kvm-pc-bios-s390-ccw-virtio-blkdev-Request-the-right-fea.patch
# For bz#2098077 - virtio-blk: Can't boot fresh installation from used virtio-blk dasd disk under certain conditions
Patch101: kvm-pc-bios-s390-ccw-netboot.mak-Ignore-Clang-s-warnings.patch
# For bz#1951522 - CVE-2021-3507 qemu-kvm: QEMU: fdc: heap buffer overflow in DMA read data transfers [rhel-9.0]
Patch102: kvm-hw-block-fdc-Prevent-end-of-track-overrun-CVE-2021-3.patch
# For bz#1951522 - CVE-2021-3507 qemu-kvm: QEMU: fdc: heap buffer overflow in DMA read data transfers [rhel-9.0]
Patch103: kvm-tests-qtest-fdc-test-Add-a-regression-test-for-CVE-2.patch
# Source-git patches
@ -1359,6 +1393,31 @@ useradd -r -u 107 -g qemu -G kvm -d / -s /sbin/nologin \
%endif
%changelog
* Mon Jul 18 2022 Miroslav Rezanina <mrezanin@redhat.com> - 7.0.0-9
- kvm-virtio-iommu-Add-bypass-mode-support-to-assigned-dev.patch [bz#2100106]
- kvm-virtio-iommu-Use-recursive-lock-to-avoid-deadlock.patch [bz#2100106]
- kvm-virtio-iommu-Add-an-assert-check-in-translate-routin.patch [bz#2100106]
- kvm-virtio-iommu-Fix-the-partial-copy-of-probe-request.patch [bz#2100106]
- kvm-virtio-iommu-Fix-migration-regression.patch [bz#2100106]
- kvm-pc-bios-s390-ccw-virtio-Introduce-a-macro-for-the-DA.patch [bz#2098077]
- kvm-pc-bios-s390-ccw-bootmap-Improve-the-guessing-logic-.patch [bz#2098077]
- kvm-pc-bios-s390-ccw-virtio-blkdev-Simplify-fix-virtio_i.patch [bz#2098077]
- kvm-pc-bios-s390-ccw-virtio-blkdev-Remove-virtio_assume_.patch [bz#2098077]
- kvm-pc-bios-s390-ccw-virtio-Set-missing-status-bits-whil.patch [bz#2098077]
- kvm-pc-bios-s390-ccw-virtio-Read-device-config-after-fea.patch [bz#2098077]
- kvm-pc-bios-s390-ccw-virtio-Beautify-the-code-for-readin.patch [bz#2098077]
- kvm-pc-bios-s390-ccw-Split-virtio-scsi-code-from-virtio_.patch [bz#2098077]
- kvm-pc-bios-s390-ccw-virtio-blkdev-Request-the-right-fea.patch [bz#2098077]
- kvm-pc-bios-s390-ccw-netboot.mak-Ignore-Clang-s-warnings.patch [bz#2098077]
- kvm-hw-block-fdc-Prevent-end-of-track-overrun-CVE-2021-3.patch [bz#1951522]
- kvm-tests-qtest-fdc-test-Add-a-regression-test-for-CVE-2.patch [bz#1951522]
- Resolves: bz#2100106
(Fix virtio-iommu/vfio bypass)
- Resolves: bz#2098077
(virtio-blk: Can't boot fresh installation from used virtio-blk dasd disk under certain conditions)
- Resolves: bz#1951522
(CVE-2021-3507 qemu-kvm: QEMU: fdc: heap buffer overflow in DMA read data transfers [rhel-9.0])
* Tue Jul 05 2022 Camilla Conte <cconte@redhat.com> - 7.0.0-8
- kvm-tests-avocado-update-aarch64_virt-test-to-exercise-c.patch [bz#2060839]
- kvm-RHEL-only-tests-avocado-Switch-aarch64-tests-from-a5.patch [bz#2060839]