linux-kernel - [GIT PULL] KVM: x86: AVIC vTPR fix for 6.17

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Message-ID: <20250916003831.630382-1-seanjc@google.com>
Date: Mon, 15 Sep 2025 17:38:31 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Paolo Bonzini <pbonzini@...hat.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Sean Christopherson <seanjc@...gle.com>
Subject: [GIT PULL] KVM: x86: AVIC vTPR fix for 6.17

Please grab a single fix for 6.17.  The bug has existed for some time, so it's
not super critical that it get into 6.17, but it'd be nice to get this on its
way to LTS kernels sooner than later.  Thanks!

The following changes since commit 42a0305ab114975dbad3fe9efea06976dd62d381:

  Merge tag 'kvmarm-fixes-6.17-1' of https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD (2025-08-29 12:57:31 -0400)

are available in the Git repository at:

  https://github.com/kvm-x86/linux.git tags/kvm-x86-fixes-6.17-rcN

for you to fetch changes up to d02e48830e3fce9701265f6c5a58d9bdaf906a76:

  KVM: SVM: Sync TPR from LAPIC into VMCB::V_TPR even if AVIC is active (2025-09-10 12:04:16 -0700)

----------------------------------------------------------------
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.

----------------------------------------------------------------
Maciej S. Szmigiero (1):
      KVM: SVM: Sync TPR from LAPIC into VMCB::V_TPR even if AVIC is active

 arch/x86/kvm/svm/svm.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)