[PATCH 13/13] KVM: SVM: Enable VNMI feature

From: Maxim Levitsky <mlevitsk@redhat.com>
To: kvm@vger.kernel.org
Cc: Paolo Bonzini <pbonzini@redhat.com>,
	Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	linux-kernel@vger.kernel.org,
	Peter Zijlstra <peterz@infradead.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Sandipan Das <sandipan.das@amd.com>,
	Daniel Sneddon <daniel.sneddon@linux.intel.com>,
	Jing Liu <jing2.liu@intel.com>,
	Josh Poimboeuf <jpoimboe@kernel.org>,
	Wyes Karny <wyes.karny@amd.com>, Borislav Petkov <bp@alien8.de>,
	Babu Moger <babu.moger@amd.com>,
	Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
	Sean Christopherson <seanjc@google.com>,
	Jim Mattson <jmattson@google.com>,
	x86@kernel.org, Maxim Levitsky <mlevitsk@redhat.com>,
	Santosh Shukla <santosh.shukla@amd.com>
Subject: [PATCH 13/13] KVM: SVM: Enable VNMI feature
Date: Thu, 17 Nov 2022 16:32:42 +0200	[thread overview]
Message-ID: <20221117143242.102721-14-mlevitsk@redhat.com> (raw)
In-Reply-To: <20221117143242.102721-1-mlevitsk@redhat.com>

From: Santosh Shukla <santosh.shukla@amd.com>

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@amd.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.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 c9190a8ee03273..5b61d89c644da6 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -1307,6 +1307,9 @@ 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);
-- 
2.34.3

