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KVM: x86: Raise an event request when processing NMIs if an NMI is pending

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Don't raise KVM_REQ_EVENT if no NMIs are pending at the end of
process_nmi().  Finishing process_nmi() without a pending NMI will become
much more likely when KVM gains support for AMD's vNMI, which allows
pending vNMIs in hardware, i.e. doesn't require explicit injection.

Signed-off-by: Santosh Shukla <Santosh.Shukla@amd.com>
Link: https://lore.kernel.org/r/20230227084016.3368-6-santosh.shukla@amd.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson
2023-02-27 14:10:10 +05:30
parent 772f254d4d
commit 2cb9317377
1 changed files with 3 additions and 1 deletions
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arch/x86/kvm/x86.c
+3 -1
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@@ -10150,7 +10150,9 @@ static void process_nmi(struct kvm_vcpu *vcpu)
vcpu->arch.nmi_pending += atomic_xchg(&vcpu->arch.nmi_queued, 0);
vcpu->arch.nmi_pending = min(vcpu->arch.nmi_pending, limit);
kvm_make_request(KVM_REQ_EVENT, vcpu);
if (vcpu->arch.nmi_pending)
kvm_make_request(KVM_REQ_EVENT, vcpu);
}
void kvm_make_scan_ioapic_request_mask(struct kvm *kvm,