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[05/47] KVM: VMX: Optimize vmx_get_cpl()

Message ID 1251282609-12835-6-git-send-email-avi@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Avi Kivity Aug. 26, 2009, 10:29 a.m. UTC
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: Avi Kivity <avi@redhat.com>
---
 arch/x86/kvm/vmx.c |    5 +----
 1 files changed, 1 insertions(+), 4 deletions(-)
diff mbox

Patch

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 32e6d20..0ba706e 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -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)