KVM: x86: Use DR7_GD macro instead of open coding check in emulator

Use DR7_GD in the emulator instead of open coding the check, and drop a
comically wrong comment.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Link: https://lore.kernel.org/r/20220830231614.3580124-10-seanjc@google.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 862498dc3d75b0ea84bb9f54ce813cab3b1eb61f..b6180032dfd6c0f888655d1bfe77c33d4ed994cb 100644 (file)
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -4166,8 +4166,7 @@ static int check_dr7_gd(struct x86_emulate_ctxt *ctxt)
 
        ctxt->ops->get_dr(ctxt, 7, &dr7);
 
-       /* Check if DR7.Global_Enable is set */
-       return dr7 & (1 << 13);
+       return dr7 & DR7_GD;
 }
 
 static int check_dr_read(struct x86_emulate_ctxt *ctxt)