On Mon, Sep 20, 2010 at 04:15:32AM -0400, Gleb Natapov wrote: > Nested SVM checks for external interrupt after injecting nested exception. > In case there is external interrupt pending the code generates "external > interrupt exit" and overwrites previous exit info. If previously injected > exception already generated exit it will be lost. > > Signed-off-by: Gleb Natapov <gleb@xxxxxxxxxx> Acked-by: Joerg Roedel <joerg.roedel@xxxxxxx> > --- > v1->v2 > - Added comment > > diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c > index 43f5558..ca778d5 100644 > --- a/arch/x86/kvm/svm.c > +++ b/arch/x86/kvm/svm.c > @@ -1707,6 +1707,14 @@ static inline bool nested_svm_intr(struct vcpu_svm *svm) > if (!(svm->vcpu.arch.hflags & HF_HIF_MASK)) > return false; > > + /* > + * if vmexit was already requested (by intercepted exception > + * for instance) do not overwrite it with "external interrupt" > + * vmexit. > + */ > + if (svm->nested.exit_required) > + return false; > + > svm->vmcb->control.exit_code = SVM_EXIT_INTR; > svm->vmcb->control.exit_info_1 = 0; > svm->vmcb->control.exit_info_2 = 0; > -- > Gleb. > -- AMD Operating System Research Center Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach General Managers: Alberto Bozzo, Andrew Bowd Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
