Il 25/09/2013 11:51, Gleb Natapov ha scritto:
> All exceptions should be checked for intercept during delivery to L2,
> but we check only #PF currently. Drop nested_run_pending while we are
> at it since exception cannot be injected during vmentry anyway.
>
> Signed-off-by: Gleb Natapov <gleb@xxxxxxxxxx>
> ---
> arch/x86/kvm/vmx.c | 8 +++-----
> 1 file changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
> index 663bc5e..5bfa09d 100644
> --- a/arch/x86/kvm/vmx.c
> +++ b/arch/x86/kvm/vmx.c
> @@ -1902,12 +1902,11 @@ static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
> * a #PF exception (this is the only case in which KVM injects a #PF when L2
> * is running).
> */
> -static int nested_pf_handled(struct kvm_vcpu *vcpu)
> +static int nested_ex_handled(struct kvm_vcpu *vcpu, unsigned nr)
> {
> struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
>
> - /* TODO: also check PFEC_MATCH/MASK, not just EB.PF. */
Just one more question, why drop this comment? It doesn't seem
incorrect in the particular case where nr == PF_VECTOR.
> - if (!(vmcs12->exception_bitmap & (1u << PF_VECTOR)))
> + if (!(vmcs12->exception_bitmap & (1u << nr)))
> return 0;
>
> nested_vmx_vmexit(vcpu);
> @@ -1921,8 +1920,7 @@ static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
> struct vcpu_vmx *vmx = to_vmx(vcpu);
> u32 intr_info = nr | INTR_INFO_VALID_MASK;
>
> - if (!reinject && nr == PF_VECTOR && is_guest_mode(vcpu) &&
> - !vmx->nested.nested_run_pending && nested_pf_handled(vcpu))
> + if (!reinject && is_guest_mode(vcpu) && nested_ex_handled(vcpu, nr))
> return;
>
> if (has_error_code) {
>
--
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