Index: /trunk/include/iprt/x86.h
===================================================================
--- /trunk/include/iprt/x86.h	(revision 82706)
+++ /trunk/include/iprt/x86.h	(revision 82707)
@@ -1412,4 +1412,6 @@
 /** @} */
 
+/** Intel TSX (Transactional Synchronization Extensions) control MSR. */
+#define IA32_TSX_CTRL                       0x122
 
 #define IA32_MTRR_PHYSBASE0                 0x200