Re: [PATCH] kvm: vmx: Use the hardware provided GPA instead of page walk

Paolo Bonzini
2017-02-07T17:22:01Z

On 27/01/2017 19:34, Paolo Bonzini wrote:
> As in the SVM patch, the guest physical address is passed by
> VMX to x86_emulate_instruction already, so mark the GPA as available
> in vcpu->arch.
>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
> arch/x86/kvm/vmx.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
> index 7c3e42623090..0828b02b5af2 100644
> --- a/arch/x86/kvm/vmx.c
> +++ b/arch/x86/kvm/vmx.c
> @@ -6382,6 +6382,7 @@ static int handle_ept_violation(struct kvm_vcpu *vcpu)
> EPT_VIOLATION_EXECUTABLE))
> ? PFERR_PRESENT_MASK : 0;
>
> + vcpu->arch.gpa_available = true;
> vcpu->arch.exit_qualification = exit_qualification;
>
> return kvm_mmu_page_fault(vcpu, gpa, error_code, NULL, 0);
> @@ -6399,6 +6400,7 @@ static int handle_ept_misconfig(struct kvm_vcpu *vcpu)
> }
>
> ret = handle_mmio_page_fault(vcpu, gpa, true);
> + vcpu->arch.gpa_available = true;
> if (likely(ret == RET_MMIO_PF_EMULATE))
> return x86_emulate_instruction(vcpu, gpa, 0, NULL, 0) ==
> EMULATE_DONE;
> @@ -8517,6 +8519,7 @@ static int vmx_handle_exit(struct kvm_vcpu *vcpu)
> u32 vectoring_info = vmx->idt_vectoring_info;
>
> trace_kvm_exit(exit_reason, vcpu, KVM_ISA_VMX);
> + vcpu->arch.gpa_available = false;
>
> /*
> * Flush logged GPAs PML buffer, this will make dirty_bitmap more
>

Ping?

Paolo