mirror of
https://github.com/torvalds/linux.git
synced 2024-12-19 09:32:32 +00:00
95290cf13e
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>
46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
#ifndef _ASM_X86_DISABLED_FEATURES_H
|
|
#define _ASM_X86_DISABLED_FEATURES_H
|
|
|
|
/* These features, although they might be available in a CPU
|
|
* will not be used because the compile options to support
|
|
* them are not present.
|
|
*
|
|
* This code allows them to be checked and disabled at
|
|
* compile time without an explicit #ifdef. Use
|
|
* 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))
|
|
# define DISABLE_CYRIX_ARR (1<<(X86_FEATURE_CYRIX_ARR & 31))
|
|
# define DISABLE_CENTAUR_MCR (1<<(X86_FEATURE_CENTAUR_MCR & 31))
|
|
#else
|
|
# define DISABLE_VME 0
|
|
# define DISABLE_K6_MTRR 0
|
|
# define DISABLE_CYRIX_ARR 0
|
|
# define DISABLE_CENTAUR_MCR 0
|
|
#endif /* CONFIG_X86_64 */
|
|
|
|
/*
|
|
* Make sure to add features to the correct mask
|
|
*/
|
|
#define DISABLED_MASK0 (DISABLE_VME)
|
|
#define DISABLED_MASK1 0
|
|
#define DISABLED_MASK2 0
|
|
#define DISABLED_MASK3 (DISABLE_CYRIX_ARR|DISABLE_CENTAUR_MCR|DISABLE_K6_MTRR)
|
|
#define DISABLED_MASK4 0
|
|
#define DISABLED_MASK5 0
|
|
#define DISABLED_MASK6 0
|
|
#define DISABLED_MASK7 0
|
|
#define DISABLED_MASK8 0
|
|
#define DISABLED_MASK9 (DISABLE_MPX)
|
|
|
|
#endif /* _ASM_X86_DISABLED_FEATURES_H */
|