From eab4b8aa34fc64e3a91358e1612e6d059396193b Mon Sep 17 00:00:00 2001 From: Avi Kivity Date: Tue, 4 Aug 2009 15:02:54 +0300 Subject: [PATCH] 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: Avi Kivity --- arch/x86/kvm/vmx.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 32e6d2031ba2..0ba706e87c50 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)