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KVM: SVM: introduce nested_run_pending

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We want to inject vmexits immediately from svm_check_nested_events,
so that the interrupt/NMI window requests happen in inject_pending_event
right after it returns.

This however has the same issue as in vmx_check_nested_events, so
introduce a nested_run_pending flag with the exact same purpose
of delaying vmexit injection after the vmentry.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini
2020-04-23 13:22:27 -04:00
parent 4aef2ec902
commit f74f94140f
3 changed files with 8 additions and 1 deletions
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4
arch/x86/kvm/svm/nested.c
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@@ -414,6 +414,7 @@ int nested_svm_vmrun(struct vcpu_svm *svm)
copy_vmcb_control_area(hsave, vmcb);
svm->nested.nested_run_pending = 1;
enter_svm_guest_mode(svm, vmcb_gpa, nested_vmcb, &map);
if (!nested_svm_vmrun_msrpm(svm)) {
@@ -815,7 +816,8 @@ static int svm_check_nested_events(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
bool block_nested_events =
kvm_event_needs_reinjection(vcpu) || svm->nested.exit_required;
kvm_event_needs_reinjection(vcpu) || svm->nested.exit_required ||
svm->nested.nested_run_pending;
if (kvm_cpu_has_interrupt(vcpu) && nested_exit_on_intr(svm)) {
if (block_nested_events)