Index: /trunk/src/VBox/VMM/VMMR3/HM.cpp
===================================================================
--- /trunk/src/VBox/VMM/VMMR3/HM.cpp	(revision 46586)
+++ /trunk/src/VBox/VMM/VMMR3/HM.cpp	(revision 46587)
@@ -1973,5 +1973,6 @@
                 uint8_t abInstr[15];
 
-                /* Replacing two instructions now. */
+                /* Replacing the two instructions above with an AMD-V specific lock-prefixed 32-bit MOV CR8 instruction so as to
+                   access CR8 in 32-bit mode and not cause a #VMEXIT. */
                 rc = PGMPhysSimpleReadGCPtr(pVCpu, &pPatch->aOpcode, pCtx->rip, cbOpMmio + cbOp);
                 AssertRC(rc);