Messages in this thread | | | Subject | Re: [PATCH v3] KVM: x86: accept userspace interrupt only if no event is injected | From | stsp <> | Date | Fri, 6 Aug 2021 20:59:03 +0300 |
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28.07.2021 00:09, Paolo Bonzini пишет: > Once an exception has been injected, any side effects related to > the exception (such as setting CR2 or DR6) have been taked place. > Therefore, once KVM sets the VM-entry interruption information > field or the AMD EVENTINJ field, the next VM-entry must deliver that > exception. > > Pending interrupts are processed after injected exceptions, so > in theory it would not be a problem to use KVM_INTERRUPT when > an injected exception is present. However, DOSEMU is using > run->ready_for_interrupt_injection to detect interrupt windows > and then using KVM_SET_SREGS/KVM_SET_REGS to inject the > interrupt manually. For this to work, the interrupt window > must be delayed after the completion of the previous event > injection. > > Cc: stable@vger.kernel.org > Reported-by: Stas Sergeev <stsp2@yandex.ru> > Tested-by: Stas Sergeev <stsp2@yandex.ru> Acked-by: stsp2@yandex.ru
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