* Mon May 08 2023 Miroslav Rezanina <mrezanin@redhat.com> - 8.0.0-2
- kvm-acpi-pcihp-allow-repeating-hot-unplug-requests.patch [bz#2087047] - kvm-hw-acpi-limit-warning-on-acpi-table-size-to-pc-machi.patch [bz#1934134] - kvm-hw-acpi-Mark-acpi-blobs-as-resizable-on-RHEL-pc-mach.patch [bz#1934134] - Resolves: bz#2087047 (Disk detach is unsuccessful while the guest is still booting) - Resolves: bz#1934134 (ACPI table limits warning when booting guest with 512 VCPUs)
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Miroslav Rezanina
parent
07d01bd47b
commit
0543c20dae
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From 61256a82ce78f40222455becb8850b5f5ebb5d72 Mon Sep 17 00:00:00 2001
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From: Igor Mammedov <imammedo@redhat.com>
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Date: Tue, 18 Apr 2023 11:04:49 +0200
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Subject: [PATCH 1/3] acpi: pcihp: allow repeating hot-unplug requests
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RH-Author: Igor Mammedov <imammedo@redhat.com>
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RH-MergeRequest: 159: acpi: pcihp: allow repeating hot-unplug requests
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RH-Bugzilla: 2087047
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RH-Acked-by: Ani Sinha <None>
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RH-Acked-by: Julia Suvorova <None>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Acked-by: MST <mst@redhat.com>
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RH-Commit: [1/1] 9c597232466b27d91f127ee6004322d6ba69755f (imammedo/qemu-kvm-c-9-s-imam)
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with Q35 using ACPI PCI hotplug by default, user's request to unplug
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device is ignored when it's issued before guest OS has been booted.
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And any additional attempt to request device hot-unplug afterwards
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results in following error:
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"Device XYZ is already in the process of unplug"
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arguably it can be considered as a regression introduced by [2],
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before which it was possible to issue unplug request multiple
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times.
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Accept new uplug requests after timeout (1ms). This brings ACPI PCI
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hotplug on par with native PCIe unplug behavior [1] and allows user
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to repeat unplug requests at propper times.
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Set expire timeout to arbitrary 1msec so user won't be able to
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flood guest with SCI interrupts by calling device_del in tight loop.
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PS:
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ACPI spec doesn't mandate what OSPM can do with GPEx.status
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bits set before it's booted => it's impl. depended.
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Status bits may be retained (I tested with one Windows version)
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or cleared (Linux since 2.6 kernel times) during guest's ACPI
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subsystem initialization.
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Clearing status bits (though not wrong per se) hides the unplug
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event from guest, and it's upto user to repeat device_del later
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when guest is able to handle unplug requests.
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1) 18416c62e3 ("pcie: expire pending delete")
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2)
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Fixes: cce8944cc9ef ("qdev-monitor: Forbid repeated device_del")
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Signed-off-by: Igor Mammedov <imammedo@redhat.com>
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Acked-by: Gerd Hoffmann <kraxel@redhat.com>
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CC: mst@redhat.com
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CC: anisinha@redhat.com
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CC: jusual@redhat.com
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CC: kraxel@redhat.com
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Message-Id: <20230418090449.2155757-1-imammedo@redhat.com>
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Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Reviewed-by: Ani Sinha <anisinha@redhat.com>
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(cherry picked from commit 0f689cf5ada4d5df5ab95c7f7aa9fc221afa855d)
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Signed-off-by: Igor Mammedov <imammedo@redhat.com>
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---
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hw/acpi/pcihp.c | 10 ++++++++++
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1 file changed, 10 insertions(+)
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diff --git a/hw/acpi/pcihp.c b/hw/acpi/pcihp.c
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index dcfb779a7a..cdd6f775a1 100644
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--- a/hw/acpi/pcihp.c
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+++ b/hw/acpi/pcihp.c
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@@ -357,6 +357,16 @@ void acpi_pcihp_device_unplug_request_cb(HotplugHandler *hotplug_dev,
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* acpi_pcihp_eject_slot() when the operation is completed.
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*/
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pdev->qdev.pending_deleted_event = true;
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+ /* if unplug was requested before OSPM is initialized,
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+ * linux kernel will clear GPE0.sts[] bits during boot, which effectively
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+ * hides unplug event. And than followup qmp_device_del() calls remain
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+ * blocked by above flag permanently.
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+ * Unblock qmp_device_del() by setting expire limit, so user can
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+ * repeat unplug request later when OSPM has been booted.
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+ */
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+ pdev->qdev.pending_deleted_expires_ms =
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+ qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL); /* 1 msec */
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+
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s->acpi_pcihp_pci_status[bsel].down |= (1U << slot);
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acpi_send_event(DEVICE(hotplug_dev), ACPI_PCI_HOTPLUG_STATUS);
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}
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--
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2.39.1
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@ -0,0 +1,40 @@
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From b4645e7682aa1bde6f89df0eff2a9de83720eecc Mon Sep 17 00:00:00 2001
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From: Ani Sinha <anisinha@redhat.com>
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Date: Tue, 2 May 2023 15:51:53 +0530
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Subject: [PATCH 3/3] hw/acpi: Mark acpi blobs as resizable on RHEL pc machines
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version 7.6 and above
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RH-Author: Ani Sinha <None>
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RH-MergeRequest: 160: hw/acpi: limit warning on acpi table size to pc machines older than version 2.3
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RH-Bugzilla: 1934134
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RH-Acked-by: Igor Mammedov <imammedo@redhat.com>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Acked-by: MST <mst@redhat.com>
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RH-Commit: [2/2] 95d443af6e75c569d89d04d028012c3c56c0c3a4 (anisinha/centos-qemu-kvm)
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Please look at QEMU upstream commit
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1af507756bae7 ("hw/acpi: limit warning on acpi table size to pc machines older than version 2.3")
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This patch adapts the above change so that it applies to RHEL pc machines of
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version 7.6 and newer. These are the machine types that are currently supported
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in RHEL. Q35 machines are not affected.
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Signed-off-by: Ani Sinha <anisinha@redhat.com>
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---
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hw/i386/pc_piix.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
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index 4d5880e249..6c7be628e1 100644
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--- a/hw/i386/pc_piix.c
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+++ b/hw/i386/pc_piix.c
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@@ -914,6 +914,7 @@ static void pc_machine_rhel7_options(MachineClass *m)
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m->default_machine_opts = "firmware=bios-256k.bin,hpet=off";
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pcmc->default_nic_model = "e1000";
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pcmc->pci_root_uid = 0;
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+ pcmc->resizable_acpi_blob = true;
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m->default_display = "std";
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m->no_parallel = 1;
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m->numa_mem_supported = true;
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--
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2.39.1
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@ -0,0 +1,101 @@
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From 3f70da88788c398877b8ded0b27689530385302b Mon Sep 17 00:00:00 2001
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From: Ani Sinha <anisinha@redhat.com>
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Date: Wed, 29 Mar 2023 10:27:26 +0530
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Subject: [PATCH 2/3] hw/acpi: limit warning on acpi table size to pc machines
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older than version 2.3
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RH-Author: Ani Sinha <None>
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RH-MergeRequest: 160: hw/acpi: limit warning on acpi table size to pc machines older than version 2.3
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RH-Bugzilla: 1934134
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RH-Acked-by: Igor Mammedov <imammedo@redhat.com>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Acked-by: MST <mst@redhat.com>
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RH-Commit: [1/2] 96c3b6d51e16734eb4e8de52635e0ca036964090 (anisinha/centos-qemu-kvm)
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i440fx machine versions 2.3 and newer supports dynamic ram
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resizing. See commit a1666142db6233 ("acpi-build: make ROMs RAM blocks resizeable") .
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Currently supported all q35 machine types (versions 2.4 and newer) supports
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resizable RAM/ROM blocks.Therefore the warning generated when the ACPI table
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size exceeds a pre-defined value does not apply to those machine versions.
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Add a check limiting the warning message to only those machines that does not
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support expandable ram blocks (that is, i440fx machines with version 2.2
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and older).
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Signed-off-by: Ani Sinha <anisinha@redhat.com>
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Message-Id: <20230329045726.14028-1-anisinha@redhat.com>
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Reviewed-by: Igor Mammedov <imammedo@redhat.com>
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Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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(cherry picked from commit 1af507756bae775028c27d30e602e2b9c72cd074)
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---
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hw/i386/acpi-build.c | 6 ++++--
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hw/i386/pc.c | 1 +
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hw/i386/pc_piix.c | 1 +
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include/hw/i386/pc.h | 3 +++
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4 files changed, 9 insertions(+), 2 deletions(-)
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diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
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index ec857a117e..9bc4d8a981 100644
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--- a/hw/i386/acpi-build.c
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+++ b/hw/i386/acpi-build.c
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@@ -2695,7 +2695,8 @@ void acpi_build(AcpiBuildTables *tables, MachineState *machine)
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int legacy_table_size =
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ROUND_UP(tables_blob->len - aml_len + legacy_aml_len,
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ACPI_BUILD_ALIGN_SIZE);
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- if (tables_blob->len > legacy_table_size) {
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+ if ((tables_blob->len > legacy_table_size) &&
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+ !pcmc->resizable_acpi_blob) {
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/* Should happen only with PCI bridges and -M pc-i440fx-2.0. */
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warn_report("ACPI table size %u exceeds %d bytes,"
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" migration may not work",
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@@ -2706,7 +2707,8 @@ void acpi_build(AcpiBuildTables *tables, MachineState *machine)
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g_array_set_size(tables_blob, legacy_table_size);
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} else {
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/* Make sure we have a buffer in case we need to resize the tables. */
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- if (tables_blob->len > ACPI_BUILD_TABLE_SIZE / 2) {
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+ if ((tables_blob->len > ACPI_BUILD_TABLE_SIZE / 2) &&
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+ !pcmc->resizable_acpi_blob) {
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/* As of QEMU 2.1, this fires with 160 VCPUs and 255 memory slots. */
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warn_report("ACPI table size %u exceeds %d bytes,"
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" migration may not work",
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diff --git a/hw/i386/pc.c b/hw/i386/pc.c
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index f216922cee..7db5a2348f 100644
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--- a/hw/i386/pc.c
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+++ b/hw/i386/pc.c
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@@ -2092,6 +2092,7 @@ static void pc_machine_class_init(ObjectClass *oc, void *data)
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pcmc->acpi_data_size = 0x20000 + 0x8000;
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pcmc->pvh_enabled = true;
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pcmc->kvmclock_create_always = true;
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+ pcmc->resizable_acpi_blob = true;
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assert(!mc->get_hotplug_handler);
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mc->async_pf_vmexit_disable = false;
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mc->get_hotplug_handler = pc_get_hotplug_handler;
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diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
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index fc704d783f..4d5880e249 100644
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--- a/hw/i386/pc_piix.c
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+++ b/hw/i386/pc_piix.c
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@@ -750,6 +750,7 @@ static void pc_i440fx_2_2_machine_options(MachineClass *m)
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compat_props_add(m->compat_props, hw_compat_2_2, hw_compat_2_2_len);
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compat_props_add(m->compat_props, pc_compat_2_2, pc_compat_2_2_len);
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pcmc->rsdp_in_ram = false;
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+ pcmc->resizable_acpi_blob = false;
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}
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DEFINE_I440FX_MACHINE(v2_2, "pc-i440fx-2.2", pc_compat_2_2_fn,
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diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
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index d218ad1628..2f514d13d8 100644
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--- a/include/hw/i386/pc.h
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+++ b/include/hw/i386/pc.h
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@@ -130,6 +130,9 @@ struct PCMachineClass {
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/* create kvmclock device even when KVM PV features are not exposed */
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bool kvmclock_create_always;
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+
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+ /* resizable acpi blob compat */
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+ bool resizable_acpi_blob;
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};
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#define TYPE_PC_MACHINE "generic-pc-machine"
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--
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2.39.1
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@ -148,7 +148,7 @@ Obsoletes: %{name}-block-ssh <= %{epoch}:%{version} \
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Summary: QEMU is a machine emulator and virtualizer
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Name: qemu-kvm
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Version: 8.0.0
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Release: 1%{?rcrel}%{?dist}%{?cc_suffix}
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Release: 2%{?rcrel}%{?dist}%{?cc_suffix}
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# Epoch because we pushed a qemu-1.0 package. AIUI this can't ever be dropped
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# Epoch 15 used for RHEL 8
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# Epoch 17 used for RHEL 9 (due to release versioning offset in RHEL 8.5)
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@ -189,6 +189,12 @@ Patch0016: 0016-qga-linux-add-usb-support-to-guest-get-fsinfo.patch
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Patch0017: 0017-Add-RHEL-9.2.0-compat-structure.patch
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Patch0018: 0018-redhat-hw-i386-pc-Update-x86-machine-type-compatibil.patch
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Patch0019: 0019-Disable-unwanted-new-devices.patch
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# For bz#2087047 - Disk detach is unsuccessful while the guest is still booting
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Patch20: kvm-acpi-pcihp-allow-repeating-hot-unplug-requests.patch
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# For bz#1934134 - ACPI table limits warning when booting guest with 512 VCPUs
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Patch21: kvm-hw-acpi-limit-warning-on-acpi-table-size-to-pc-machi.patch
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# For bz#1934134 - ACPI table limits warning when booting guest with 512 VCPUs
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Patch22: kvm-hw-acpi-Mark-acpi-blobs-as-resizable-on-RHEL-pc-mach.patch
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%if %{have_clang}
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BuildRequires: clang
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@ -1211,6 +1217,15 @@ useradd -r -u 107 -g qemu -G kvm -d / -s /sbin/nologin \
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%endif
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%changelog
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* Mon May 08 2023 Miroslav Rezanina <mrezanin@redhat.com> - 8.0.0-2
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- kvm-acpi-pcihp-allow-repeating-hot-unplug-requests.patch [bz#2087047]
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- kvm-hw-acpi-limit-warning-on-acpi-table-size-to-pc-machi.patch [bz#1934134]
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- kvm-hw-acpi-Mark-acpi-blobs-as-resizable-on-RHEL-pc-mach.patch [bz#1934134]
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- Resolves: bz#2087047
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(Disk detach is unsuccessful while the guest is still booting)
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- Resolves: bz#1934134
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(ACPI table limits warning when booting guest with 512 VCPUs)
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* Thu Apr 20 2023 Miroslav Rezanina <mrezanin@redhat.com> - 8.0.0-1
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- Rebase to QEMU 8.0.0
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- Resolves: bz#2180898
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