[PATCH] KVM: Make the GET_SREGS and SET_SREGS ioctls symmetric

This makes the SET_SREGS ioctl behave symmetrically to the GET_SREGS ioctl wrt
the segment access rights flag.

Signed-off-by: Uri Lublin <uril@qumranet.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index ad97014..fc01c4b 100644 (file)
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -884,6 +884,8 @@ static void vmx_set_segment(struct kvm_vcpu *vcpu,
                ar |= (var->db & 1) << 14;
                ar |= (var->g & 1) << 15;
        }
+       if (ar == 0) /* a 0 value means unusable */
+               ar = AR_UNUSABLE_MASK;
        vmcs_write32(sf->ar_bytes, ar);
 }