Re: [PATCH v2 1/3] KVM: x86: Exit to user-mode on #UD intercept when emulator requires

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2017-11-06 22:39 GMT+08:00 Liran Alon <liran.alon@xxxxxxxxxx>:
> Signed-off-by: Liran Alon <liran.alon@xxxxxxxxxx>
> Reviewed-by: Nikita Leshenko <nikita.leshchenko@xxxxxxxxxx>
> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> Reviewed-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx

Except the changelog.

Reviewed-by: Wanpeng Li <wanpeng.li@xxxxxxxxxxx>

> ---
>  arch/x86/kvm/svm.c | 2 ++
>  arch/x86/kvm/vmx.c | 2 ++
>  2 files changed, 4 insertions(+)
>
> diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
> index 0e68f0b3cbf7..e0162b20e3c9 100644
> --- a/arch/x86/kvm/svm.c
> +++ b/arch/x86/kvm/svm.c
> @@ -2189,6 +2189,8 @@ static int ud_interception(struct vcpu_svm *svm)
>         int er;
>
>         er = emulate_instruction(&svm->vcpu, EMULTYPE_TRAP_UD);
> +       if (er == EMULATE_USER_EXIT)
> +               return 0;
>         if (er != EMULATE_DONE)
>                 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
>         return 1;
> diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
> index 95a01609d7ee..2b63d9edc207 100644
> --- a/arch/x86/kvm/vmx.c
> +++ b/arch/x86/kvm/vmx.c
> @@ -5886,6 +5886,8 @@ static int handle_exception(struct kvm_vcpu *vcpu)
>                         return 1;
>                 }
>                 er = emulate_instruction(vcpu, EMULTYPE_TRAP_UD);
> +               if (er == EMULATE_USER_EXIT)
> +                       return 0;
>                 if (er != EMULATE_DONE)
>                         kvm_queue_exception(vcpu, UD_VECTOR);
>                 return 1;
> --
> 1.9.1
>



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