Commit eab4b8aa authored by Avi Kivity's avatar Avi Kivity
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KVM: VMX: Optimize vmx_get_cpl() 



Instead of calling vmx_get_segment() (which reads a whole bunch of
vmcs fields), read only the cs selector which contains the cpl.

Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent 07708c4a

arch/x86/kvm/vmx.c

+1 −4
Original line number Diff line number Diff line
@@ -1773,16 +1773,13 @@ static void vmx_get_segment(struct kvm_vcpu *vcpu, 


static int vmx_get_cpl(struct kvm_vcpu *vcpu)

{

	struct kvm_segment kvm_seg;



	if (!(vcpu->arch.cr0 & X86_CR0_PE)) /* if real mode */

		return 0;



	if (vmx_get_rflags(vcpu) & X86_EFLAGS_VM) /* if virtual 8086 */

		return 3;



	vmx_get_segment(vcpu, &kvm_seg, VCPU_SREG_CS);

	return kvm_seg.selector & 3;

	return vmcs_read16(GUEST_CS_SELECTOR) & 3;

}



static u32 vmx_segment_access_rights(struct kvm_segment *var)