Inject the NMI by setting V_NMI in the VMCB interrupt control. processor
will clear V_NMI to acknowledge processing has started and will keep the
V_NMI_MASK set until the processor is done with processing the NMI event.
Signed-off-by: Santosh Shukla <santosh.shukla@xxxxxxx>
---
v2:
- Added WARN_ON check for vnmi pending.
- use `get_vnmi_vmcb` to get correct vmcb so to inject vnmi.
arch/x86/kvm/svm/svm.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 44c1f2317b45..c73a1809a7c7 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -3375,12 +3375,20 @@ static void pre_svm_run(struct kvm_vcpu *vcpu)
static void svm_inject_nmi(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
+ struct vmcb *vmcb = NULL;
+
+ ++vcpu->stat.nmi_injections;
+ if (is_vnmi_enabled(svm)) {
+ vmcb = get_vnmi_vmcb(svm);
+ WARN_ON(vmcb->control.int_ctl & V_NMI_PENDING);
+ vmcb->control.int_ctl |= V_NMI_PENDING;
+ return;
+ }
svm->vmcb->control.event_inj = SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_NMI;
vcpu->arch.hflags |= HF_NMI_MASK;
if (!sev_es_guest(vcpu->kvm))
svm_set_intercept(svm, INTERCEPT_IRET);
- ++vcpu->stat.nmi_injections;
}
static void svm_inject_irq(struct kvm_vcpu *vcpu)
--
2.25.1
