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KVM: x86: Route pending NMIs from userspace through process_nmi()

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Use the asynchronous NMI queue to handle pending NMIs coming in from
userspace during KVM_SET_VCPU_EVENTS so that all of KVM's logic for
handling multiple NMIs goes through process_nmi().  This will simplify
supporting SVM's upcoming "virtual NMI" functionality, which will need
changes KVM manages pending NMIs.

Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson 2023-03-22 17:40:16 -07:00
parent 1c4522ab13
commit bdedff2631
1 changed files with 3 additions and 3 deletions
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6
arch/x86/kvm/x86.c
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@ -5213,9 +5213,9 @@ static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu,
vcpu->arch.nmi_injected = events->nmi.injected;
if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING) {
vcpu->arch.nmi_pending = events->nmi.pending;
if (vcpu->arch.nmi_pending)
kvm_make_request(KVM_REQ_NMI, vcpu);
vcpu->arch.nmi_pending = 0;
atomic_set(&vcpu->arch.nmi_queued, events->nmi.pending);
kvm_make_request(KVM_REQ_NMI, vcpu);
}
static_call(kvm_x86_set_nmi_mask)(vcpu, events->nmi.masked);