Messages in this thread Patch in this message | | | From | Santosh Shukla <> | Subject | [PATCH 4/7] KVM: SVM: Report NMI not allowed when Guest busy handling VNMI | Date | Thu, 2 Jun 2022 19:56:17 +0530 |
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In the VNMI case, Report NMI is not allowed when the processor set the V_NMI_MASK to 1 which means the Guest is busy handling VNMI.
Signed-off-by: Santosh Shukla <santosh.shukla@amd.com> --- arch/x86/kvm/svm/svm.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index d67a54517d95..a405e414cae4 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -3483,6 +3483,9 @@ bool svm_nmi_blocked(struct kvm_vcpu *vcpu) struct vmcb *vmcb = svm->vmcb; bool ret; + if (is_vnmi_enabled(vmcb) && is_vnmi_mask_set(vmcb)) + return true; + if (!gif_set(svm)) return true; @@ -3618,6 +3621,9 @@ static void svm_enable_nmi_window(struct kvm_vcpu *vcpu) { struct vcpu_svm *svm = to_svm(vcpu); + if (is_vnmi_enabled(svm->vmcb) && is_vnmi_mask_set(svm->vmcb)) + return; + if ((vcpu->arch.hflags & (HF_NMI_MASK | HF_IRET_MASK)) == HF_NMI_MASK) return; /* IRET will cause a vm exit */ -- 2.25.1
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