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KVM x86 fix for 6.17-rcN

Browse source 
Sync the vTPR from the local APIC to the VMCB even when AVIC is active, to fix
 a bug where host updates to the vTPR, e.g. via KVM_SET_LAPIC or emulation of a
 guest access, effectively get lost and result in interrupt delivery issues in
 the guest.
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Merge tag 'kvm-x86-fixes-6.17-rcN' of https://github.com/kvm-x86/linux into HEAD

KVM x86 fix for 6.17-rcN

Sync the vTPR from the local APIC to the VMCB even when AVIC is active, to fix
a bug where host updates to the vTPR, e.g. via KVM_SET_LAPIC or emulation of a
guest access, effectively get lost and result in interrupt delivery issues in
the guest.
This commit is contained in:
Paolo Bonzini 2025-09-17 19:45:02 +02:00
commit f6f43a5338
1 changed files with 1 additions and 2 deletions
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3
arch/x86/kvm/svm/svm.c
View file

@ -4046,8 +4046,7 @@ static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu)
struct vcpu_svm *svm = to_svm(vcpu);
u64 cr8;
if (nested_svm_virtualize_tpr(vcpu) ||
kvm_vcpu_apicv_active(vcpu))
if (nested_svm_virtualize_tpr(vcpu))
return;
cr8 = kvm_get_cr8(vcpu);