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64b5bd2704
If a nested VM is started while an IRQ was pending and with V_INTR_MASKING=1, the behavior of the guest depends on host IF. If it is 1, the VM should exit immediately, before executing the first instruction of the guest, because VMRUN sets GIF back to 1. If it is 0 and the host has VGIF, however, at the time of the VMRUN instruction L0 is running the guest with a pending interrupt window request. This interrupt window request is completely irrelevant to L2, since IF only controls virtual interrupts, so this patch drops INTERCEPT_VINTR from the VMCB while running L2 under these circumstances. To simplify the code, both steps of enabling the interrupt window (setting the VINTR intercept and requesting a fake virtual interrupt in svm_inject_irq) are grouped in the svm_set_vintr function, and likewise for dismissing the interrupt window request in svm_clear_vintr. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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