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KVM: nSVM: Preserve IRQ/NMI/SMI priority irrespective of exiting behavior

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Short circuit vmx_check_nested_events() if an unblocked IRQ/NMI/SMI is
pending and needs to be injected into L2, priority between coincident
events is not dependent on exiting behavior.

Fixes: b518ba9fa6 ("KVM: nSVM: implement check_nested_events for interrupts")
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini
2020-04-23 08:13:10 -04:00
parent fc6f7c03ad
commit 221e761090
1 changed files with 9 additions and 3 deletions
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12
arch/x86/kvm/svm/nested.c
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@@ -835,23 +835,29 @@ static int svm_check_nested_events(struct kvm_vcpu *vcpu)
kvm_event_needs_reinjection(vcpu) || svm->nested.exit_required ||
svm->nested.nested_run_pending;
if (vcpu->arch.smi_pending && nested_exit_on_smi(svm)) {
if (vcpu->arch.smi_pending && !svm_smi_blocked(vcpu)) {
if (block_nested_events)
return -EBUSY;
if (!nested_exit_on_smi(svm))
return 0;
nested_svm_smi(svm);
return 0;
}
if (vcpu->arch.nmi_pending && nested_exit_on_nmi(svm)) {
if (vcpu->arch.nmi_pending && !svm_nmi_blocked(vcpu)) {
if (block_nested_events)
return -EBUSY;
if (!nested_exit_on_nmi(svm))
return 0;
nested_svm_nmi(svm);
return 0;
}
if (kvm_cpu_has_interrupt(vcpu) && nested_exit_on_intr(svm)) {
if (kvm_cpu_has_interrupt(vcpu) && !svm_interrupt_blocked(vcpu)) {
if (block_nested_events)
return -EBUSY;
if (!nested_exit_on_intr(svm))
return 0;
nested_svm_intr(svm);
return 0;
}