[PATCH 4/7] KVM: SVM: Report NMI not allowed when Guest busy handling VNMI

[Santosh Shukla]

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@xxxxxxx>
---
 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