KVM: VMX: reset CPL only on CS register write.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 9d2ec88..edfbe94 100644 (file)
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -3269,7 +3269,8 @@ static void vmx_set_segment(struct kvm_vcpu *vcpu,
        const struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
 
        vmx_segment_cache_clear(vmx);
-       __clear_bit(VCPU_EXREG_CPL, (ulong *)&vcpu->arch.regs_avail);
+       if (seg == VCPU_SREG_CS)
+               __clear_bit(VCPU_EXREG_CPL, (ulong *)&vcpu->arch.regs_avail);
 
        if (vmx->rmode.vm86_active && seg != VCPU_SREG_LDTR) {
                vmx->rmode.segs[seg] = *var;