x86/cpufeature: Add RING3MWAIT to CPU features

BugLink: http://bugs.launchpad.net/bugs/1637550
Add software-defined CPUID bit for the non-architectural ring 3
MONITOR/MWAIT feature.

Signed-off-by: Grzegorz Andrejczuk <grzegorz.andrejczuk@intel.com>
Cc: Piotr.Luc@intel.com
Cc: dave.hansen@linux.intel.com
Link: http://lkml.kernel.org/r/1484918557-15481-4-git-send-email-grzegorz.andrejczuk@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
(cherry picked from commit 1d12d0ef0194ccc4dcebed3d96bb2301b26fc3ee)
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Robert Hooker <sarvatt@ubuntu.com>

diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h
index eafee3161d1c0fa04cd82b12dcf15003a89d04b4..167e1402e92ca21ced116a1e3be787cd5889406c 100644 (file)
--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -100,7 +100,7 @@
 #define X86_FEATURE_XTOPOLOGY  ( 3*32+22) /* cpu topology enum extensions */
 #define X86_FEATURE_TSC_RELIABLE ( 3*32+23) /* TSC is known to be reliable */
 #define X86_FEATURE_NONSTOP_TSC        ( 3*32+24) /* TSC does not stop in C states */
-/* free, was #define X86_FEATURE_CLFLUSH_MONITOR ( 3*32+25) * "" clflush reqd with monitor */
+#define X86_FEATURE_RING3MWAIT ( 3*32+25) /* ring 3 MONITOR/MWAIT */
 #define X86_FEATURE_EXTD_APICID        ( 3*32+26) /* has extended APICID (8 bits) */
 #define X86_FEATURE_AMD_DCM     ( 3*32+27) /* multi-node processor */
 #define X86_FEATURE_APERFMPERF ( 3*32+28) /* APERFMPERF */