Messages in this thread Patch in this message | | | Date | Tue, 30 Aug 2022 23:16:09 +0000 | Subject | [PATCH v5 22/27] KVM: x86: Treat pending TRIPLE_FAULT requests as pending exceptions | From | Sean Christopherson <> |
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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> --- arch/x86/kvm/x86.c | 3 --- arch/x86/kvm/x86.h | 3 ++- 2 files changed, 2 insertions(+), 4 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 17cf43ca42c3..d004e18c7cdb 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -12742,9 +12742,6 @@ 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; } diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h index 256745d1a2c3..a784ff90740b 100644 --- a/arch/x86/kvm/x86.h +++ b/arch/x86/kvm/x86.h @@ -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) -- 2.37.2.672.g94769d06f0-goog
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