Re: [PATCH v2 3/4] x86: KVM: SVM: refresh AVIC inhibition in svm_leave_nested()

On Thu, Sep 28, 2023, Maxim Levitsky wrote:

svm_leave_nested() similar to a nested VM exit, get the vCPU out of nested mode and thus should end the local inhibition of AVIC on this vCPU.

Failure to do so, can lead to hangs on guest reboot.

Raise the KVM_REQ_APICV_UPDATE request to refresh the AVIC state of the current vCPU in this case.

Fixes: f44509f849fe ("KVM: x86: SVM: allow AVIC to co-exist with a nested guest running") Cc: stable@vger.kernel.org Signed-off-by: Maxim Levitsky mlevitsk@redhat.com

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Reviewed-by: Sean Christopherson seanjc@google.com