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KVM: x86: Treat pending TRIPLE_FAULT requests as pending exceptions

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Treat pending TRIPLE_FAULTS as pending exceptions.  A triple fault is an
exception for all intents and purposes, it's just not tracked as such
because there's no vector associated the exception.  E.g. if userspace
were to set vcpu->request_interrupt_window while running L2 and L2 hit a
triple fault, a triple fault nested VM-Exit should be synthesized to L1
before exiting to userspace with KVM_EXIT_IRQ_WINDOW_OPEN.

Link: https://lore.kernel.org/all/YoVHAIGcFgJit1qp@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Link: https://lore.kernel.org/r/20220830231614.3580124-23-seanjc@google.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2022-08-30 23:16:09 +00:00 • committed by Paolo Bonzini
parent 7709aba8f7
commit 7055fb1131
2 changed files with 2 additions and 4 deletions
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3
arch/x86/kvm/x86.c
View file

@ -12760,9 +12760,6 @@ static inline bool kvm_vcpu_has_events(struct kvm_vcpu *vcpu)
if (kvm_xen_has_pending_events(vcpu))
return true;
if (kvm_test_request(KVM_REQ_TRIPLE_FAULT, vcpu))
return true;
return false;
}

3
arch/x86/kvm/x86.h
View file

@ -85,7 +85,8 @@ int kvm_check_nested_events(struct kvm_vcpu *vcpu);
static inline bool kvm_is_exception_pending(struct kvm_vcpu *vcpu)
{
return vcpu->arch.exception.pending ||
vcpu->arch.exception_vmexit.pending;
vcpu->arch.exception_vmexit.pending ||
kvm_test_request(KVM_REQ_TRIPLE_FAULT, vcpu);
}
static inline void kvm_clear_exception_queue(struct kvm_vcpu *vcpu)