KVM: SVM: implement dedicated NMI exit handler

With an exit handler for NMI intercepts its possible to account them using
kvmtrace.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 6b0d5fa5bab3..8a2118b09fd2 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1081,6 +1081,11 @@ static int io_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
         return kvm_emulate_pio(&svm->vcpu, kvm_run, in, size, port);
 }
 
+static int nmi_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
+{
+        return 1;
+}
+
 static int nop_on_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
 {
         return 1;
@@ -1365,7 +1370,7 @@ static int (*svm_exit_handlers[])(struct vcpu_svm *svm,
         [SVM_EXIT_EXCP_BASE + NM_VECTOR]        = nm_interception,
         [SVM_EXIT_EXCP_BASE + MC_VECTOR]        = mc_interception,
         [SVM_EXIT_INTR]                         = nop_on_interception,
-        [SVM_EXIT_NMI]                          = nop_on_interception,
+        [SVM_EXIT_NMI]                          = nmi_interception,
         [SVM_EXIT_SMI]                          = nop_on_interception,
         [SVM_EXIT_INIT]                         = nop_on_interception,
         [SVM_EXIT_VINTR]                        = interrupt_window_interception,