104 lines
3.7 KiB
Diff
104 lines
3.7 KiB
Diff
From 7f7a15ba9ad3f1d906b472cad4972c80d11b77fc Mon Sep 17 00:00:00 2001
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From: Igor Mammedov <imammedo@redhat.com>
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Date: Fri, 28 Aug 2020 16:23:43 -0400
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Subject: [PATCH 01/11] Revert "i386: Fix pkg_id offset for EPYC cpu models"
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RH-Author: Igor Mammedov <imammedo@redhat.com>
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Message-id: <20200828162349.1616028-2-imammedo@redhat.com>
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Patchwork-id: 98247
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O-Subject: [RHEL-AV 8.3.0 qemu-kvm PATCH 1/7] Revert "i386: Fix pkg_id offset for EPYC cpu models"
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Bugzilla: 1873417
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RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
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RH-Acked-by: Eduardo Habkost <ehabkost@redhat.com>
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RH-Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1873417
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Brew: http://brewweb.devel.redhat.com/brew/taskinfo?taskID=31005031
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Branch: rhel-av-8.3.0
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Upstream: RHEL only
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Tested: locally
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A regression was introduced since qemu-5.0, when EPYC specific
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APIC ID encoding was introduced. Which leads to migration failing
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with:
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"
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: Unknown savevm section or instance 'apic' 4. Make sure that your current VM setup matches your saved VM setup, including any hotplugged devices
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: load of migration failed: Invalid argument
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"
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when EPYC cpu model and more than 1 numa node is used.
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EPYC specific APIC ID encoding is considered as failed
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experiment and upstream is preparing to revert it as well.
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This reverts commit 7b225762c8c05fd31d4c2be116aedfbc00383f8b.
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PS:
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fixup an access to pkg_offset that were added by
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cac9edfc4da (target/i386: Fix the CPUID leaf CPUID_Fn80000008)
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Signed-off-by: Igor Mammedov <imammedo@redhat.com>
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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hw/i386/pc.c | 1 -
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target/i386/cpu.c | 6 +++---
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target/i386/cpu.h | 1 -
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3 files changed, 3 insertions(+), 5 deletions(-)
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diff --git a/hw/i386/pc.c b/hw/i386/pc.c
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index a75e0137ab..f469c060e5 100644
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--- a/hw/i386/pc.c
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+++ b/hw/i386/pc.c
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@@ -1763,7 +1763,6 @@ static void pc_cpu_pre_plug(HotplugHandler *hotplug_dev,
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env->nr_dies = x86ms->smp_dies;
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env->nr_nodes = topo_info.nodes_per_pkg;
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- env->pkg_offset = x86ms->apicid_pkg_offset(&topo_info);
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/*
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* If APIC ID is not set,
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diff --git a/target/i386/cpu.c b/target/i386/cpu.c
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index cdaa1463f2..6517cc73a2 100644
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--- a/target/i386/cpu.c
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+++ b/target/i386/cpu.c
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@@ -5680,7 +5680,7 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
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*ecx |= CPUID_TOPOLOGY_LEVEL_SMT;
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break;
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case 1:
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- *eax = env->pkg_offset;
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+ *eax = apicid_pkg_offset(&topo_info);
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*ebx = cs->nr_cores * cs->nr_threads;
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*ecx |= CPUID_TOPOLOGY_LEVEL_CORE;
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break;
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@@ -5714,7 +5714,7 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
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*ecx |= CPUID_TOPOLOGY_LEVEL_CORE;
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break;
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case 2:
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- *eax = env->pkg_offset;
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+ *eax = apicid_pkg_offset(&topo_info);
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*ebx = env->nr_dies * cs->nr_cores * cs->nr_threads;
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*ecx |= CPUID_TOPOLOGY_LEVEL_DIE;
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break;
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@@ -5895,7 +5895,7 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
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* CPUX86State::pkg_offset.
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* Bits 7:0 is "The number of threads in the package is NC+1"
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*/
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- *ecx = (env->pkg_offset << 12) |
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+ *ecx = (apicid_pkg_offset(&topo_info) << 12) |
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((cs->nr_cores * cs->nr_threads) - 1);
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} else {
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*ecx = 0;
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diff --git a/target/i386/cpu.h b/target/i386/cpu.h
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index e1a5c174dc..d5ad42d694 100644
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--- a/target/i386/cpu.h
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+++ b/target/i386/cpu.h
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@@ -1630,7 +1630,6 @@ typedef struct CPUX86State {
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unsigned nr_dies;
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unsigned nr_nodes;
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- unsigned pkg_offset;
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} CPUX86State;
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struct kvm_msrs;
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--
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2.27.0
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