linux-kernel - [PATCH 7/7] KVM: SVM: Enable VNMI feature

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Date:   Thu, 2 Jun 2022 19:56:20 +0530
From:   Santosh Shukla <santosh.shukla@....com>
To:     Paolo Bonzini <pbonzini@...hat.com>
CC:     Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        Tom Lendacky <thomas.lendacky@....com>, <kvm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <Santosh.Shukla@....com>
Subject: [PATCH 7/7] KVM: SVM: Enable VNMI feature

Enable the NMI virtualization (V_NMI_ENABLE) in the VMCB interrupt
control when the vnmi module parameter is set.

Signed-off-by: Santosh Shukla <santosh.shukla@....com>
---
 arch/x86/kvm/svm/svm.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index c91af728420b..69a98419203e 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -1205,6 +1205,9 @@ static void init_vmcb(struct kvm_vcpu *vcpu)
 	if (kvm_vcpu_apicv_active(vcpu))
 		avic_init_vmcb(svm, vmcb);
 
+	if (vnmi)
+		svm->vmcb->control.int_ctl |= V_NMI_ENABLE;
+
 	if (vgif) {
 		svm_clr_intercept(svm, INTERCEPT_STGI);
 		svm_clr_intercept(svm, INTERCEPT_CLGI);
-- 
2.25.1