Messages in this thread Patch in this message | | | Date | Mon, 17 Nov 2014 16:06:14 -0800 | From | tip-bot for Dave Hansen <> | Subject | [tip:x86/mpx] x86, mpx: Add MPX to disabled features |
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Commit-ID: 95290cf13e561b52dceadb9a8b8ee8ff2464b142 Gitweb: http://git.kernel.org/tip/95290cf13e561b52dceadb9a8b8ee8ff2464b142 Author: Dave Hansen <dave.hansen@linux.intel.com> AuthorDate: Fri, 14 Nov 2014 07:18:23 -0800 Committer: Thomas Gleixner <tglx@linutronix.de> CommitDate: Tue, 18 Nov 2014 00:58:53 +0100
x86, mpx: Add MPX to disabled features
This allows us to use cpu_feature_enabled(X86_FEATURE_MPX) as both a runtime and compile-time check.
When CONFIG_X86_INTEL_MPX is disabled, cpu_feature_enabled(X86_FEATURE_MPX) will evaluate at compile-time to 0. If CONFIG_X86_INTEL_MPX=y, then the cpuid flag will be checked at runtime.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Cc: Qiaowei Ren <qiaowei.ren@intel.com> Cc: linux-mm@kvack.org Cc: linux-mips@linux-mips.org Cc: Dave Hansen <dave@sr71.net> Link: http://lkml.kernel.org/r/20141114151823.B358EAD2@viggo.jf.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> --- arch/x86/include/asm/disabled-features.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/disabled-features.h b/arch/x86/include/asm/disabled-features.h index 97534a7..f226df0 100644 --- a/arch/x86/include/asm/disabled-features.h +++ b/arch/x86/include/asm/disabled-features.h @@ -10,6 +10,12 @@ * cpu_feature_enabled(). */ +#ifdef CONFIG_X86_INTEL_MPX +# define DISABLE_MPX 0 +#else +# define DISABLE_MPX (1<<(X86_FEATURE_MPX & 31)) +#endif + #ifdef CONFIG_X86_64 # define DISABLE_VME (1<<(X86_FEATURE_VME & 31)) # define DISABLE_K6_MTRR (1<<(X86_FEATURE_K6_MTRR & 31)) @@ -34,6 +40,6 @@ #define DISABLED_MASK6 0 #define DISABLED_MASK7 0 #define DISABLED_MASK8 0 -#define DISABLED_MASK9 0 +#define DISABLED_MASK9 (DISABLE_MPX) #endif /* _ASM_X86_DISABLED_FEATURES_H */
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