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

Paolo Bonzini
2017-01-27T18:35:14Z

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
--
1.8.3.1