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| author | Avi Kivity <avi@redhat.com> | 2009-08-04 14:02:54 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2009-09-10 07:33:21 +0200 |
| commit | eab4b8aa34fc64e3a91358e1612e6d059396193b (patch) | |
| tree | 0cdb3e72ff84cdbbd9a77afa80be209e15c91408 /arch/x86/kvm/vmx.c | |
| parent | KVM: x86: Disallow hypercalls for guest callers in rings > 0 (diff) | |
| download | linux-eab4b8aa34fc64e3a91358e1612e6d059396193b.tar.xz linux-eab4b8aa34fc64e3a91358e1612e6d059396193b.zip | |
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 <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 5 |
1 files changed, 1 insertions, 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) |