Messages in this thread | | | Date | Wed, 20 Apr 2022 01:37:28 +0000 | Subject | [PATCH v2 0/4] KVM: x86: APICv fixes | From | Sean Christopherson <> |
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Patch 1 is brown paper bag fix for a copy+paste bug (thankfully from this cycle).
Patch 2 fixes a nVMX + APICv bug where KVM essentially corrupts vmcs02 if an APICv update arrives while L2 is running. Found when testing a slight variation of patch 3.
Patch 3 fixes a race where an APICv update that occurs while a vCPU is being created will fail to notify that vCPU due it not yet being visible to the updater.
Patch 4 is a minor optimization/cleanup found by inspection when digging into everything else.
v2: - Collect reviews. [Maxim] - Reword patch 2's changelog to make it clear that ignoring vmcs02 is perfectly ok. [Maxim]
v1: https://lore.kernel.org/all/20220416034249.2609491-3-seanjc@google.com
Sean Christopherson (4): KVM: x86: Tag APICv DISABLE inhibit, not ABSENT, if APICv is disabled KVM: nVMX: Defer APICv updates while L2 is active until L1 is active KVM: x86: Pend KVM_REQ_APICV_UPDATE during vCPU creation to fix a race KVM: x86: Skip KVM_GUESTDBG_BLOCKIRQ APICv update if APICv is disabled
arch/x86/kvm/vmx/nested.c | 5 +++++ arch/x86/kvm/vmx/vmx.c | 5 +++++ arch/x86/kvm/vmx/vmx.h | 1 + arch/x86/kvm/x86.c | 20 ++++++++++++++++++-- 4 files changed, 29 insertions(+), 2 deletions(-)
base-commit: 150866cd0ec871c765181d145aa0912628289c8a -- 2.36.0.rc0.470.gd361397f0d-goog
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