Add CR4.SMAP control bit.

Sponsored by: The FreeBSD Foundation MFC after: 3 days
2018-01-01 19:34:19 +00:00 · 2018-01-01 19:34:19 +00:00 · da457ed9d6
commit da457ed9d6
parent 9997c0481c
1 changed files with 1 additions and 0 deletions
--- a/sys/x86/include/specialreg.h
+++ b/sys/x86/include/specialreg.h
@ -76,6 +76,7 @@
 #define	CR4_PCIDE 0x00020000	/* Enable Context ID */
 #define	CR4_XSAVE 0x00040000	/* XSETBV/XGETBV */
 #define	CR4_SMEP 0x00100000	/* Supervisor-Mode Execution Prevention */
+#define	CR4_SMAP 0x00200000	/* Supervisor-Mode Access Prevention */

 /*
 * Bits in AMD64 special registers.  EFER is 64 bits wide.