Re: [PATCH 0/2] KVM: SVM: Fix CR8 intercpetion woes with AVIC

[Sean Christopherson]

On Tue, 03 Feb 2026 11:07:08 -0800, Sean Christopherson wrote:
> Fix a bug (or rather, a class of bugs) where SVM leaves the CR8 write
> intercept enabled after AVIC is enabled.  On its own, the dangling CR8
> intercept is "just" a performance issue.  But combined with the TPR sync bug
> fixed by commit d02e48830e3f ("KVM: SVM: Sync TPR from LAPIC into VMCB::V_TPR
> even if AVIC is active"), the danging intercept is fatal to Windows guests as
> the TPR seen by hardware gets wildly out of sync with reality.
> 
> [...]

Applied to kvm-x86 fixes, thanks!

[1/2] KVM: SVM: Initialize AVIC VMCB fields if AVIC is enabled with in-kernel APIC
      https://github.com/kvm-x86/linux/commit/9071d0eb6955
[2/2] KVM: SVM: Set/clear CR8 write interception when AVIC is (de)activated
      https://github.com/kvm-x86/linux/commit/e992bf67bcba

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https://github.com/kvm-x86/linux/tree/next