[Devel] [PATCH hci-8.1 v2 0/2] KVM: VMX: fix stale SVI after APICv is re-activated at runtime

[Konstantin Khorenko]

On Thu, 24 Sep 2026 19:15:36 +0200, Konstantin Khorenko wrote:
> KVM: VMX: fix stale SVI after APICv is re-activated at runtime
> 
> A Windows guest with Hyper-V SynIC enlightenments runs with APICv
> inhibited for as long as Windows uses SynIC auto-EOI. A system_reset
> clears SynIC, the inhibit lifts and KVM re-activates APICv on every
> vCPU. __kvm_vcpu_update_apicv() refreshes the VMCS exec controls but
> never re-syncs GUEST_INTR_STATUS.SVI from the software vISR, so each
> vCPU carries whatever SVI it had when APICv was last switched off.
> 
> [...]

Applied to branch-rh10-6.12.0-211.52.1.22.x.vz10-ovz, will be released in rh10-6.12.0-211.52.1.22.3.vz10, thanks!

[1/2] ms/KVM: VMX: Update SVI during runtime APICv activation
      https://bitbucket.org/virtuozzocore/vzkernel.vzs/commits/0571a0e123ea
[2/2] ms/KVM: nVMX: Immediately refresh APICv controls as needed on nested VM-Exit
      https://bitbucket.org/virtuozzocore/vzkernel.vzs/commits/510fb493f8a3

-- 
Konstantin Khorenko <khorenko at virtuozzo.com>