Messages in this thread Patch in this message | | | From | Santosh Shukla <> | Subject | [PATCHv4 5/8] KVM: SVM: Add VNMI support in inject_nmi | Date | Mon, 29 Aug 2022 15:38:47 +0530 |
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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.
Also, handle the nmi_l1_to_l2 case such that when it is true then NMI to be injected originally comes from L1's VMCB12 EVENTINJ field. So adding a check for that case.
Signed-off-by: Santosh Shukla <santosh.shukla@amd.com> --- v4: - Added `nmi_l1_to_l2` check, discussion thread https://lore.kernel.org/all/bf9e8a9c-5172-b61a-be6e-87a919442fbd@maciej.szmigiero.name/
v3: - Removed WARN_ON check.
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 | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index 810b93774a95..4aa7606a9aa2 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -3479,7 +3479,14 @@ 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; + if (is_vnmi_enabled(svm) && !svm->nmi_l1_to_l2) { + vmcb = get_vnmi_vmcb(svm); + vmcb->control.int_ctl |= V_NMI_PENDING; + ++vcpu->stat.nmi_injections; + return; + } svm->vmcb->control.event_inj = SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_NMI; if (svm->nmi_l1_to_l2) -- 2.25.1
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