diff options
| author | Dave Hansen <dave.hansen@linux.intel.com> | 2014-09-11 23:15:24 +0200 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2014-09-11 23:30:17 +0200 |
| commit | 9298b815efe500b272e4084ed05eeae7a92b5340 (patch) | |
| tree | 7ea33c7d7576125749453b793ccb2143140d14a8 /arch/x86/include/asm/disabled-features.h | |
| parent | x86: Introduce disabled-features (diff) | |
| download | linux-9298b815efe500b272e4084ed05eeae7a92b5340.tar.xz linux-9298b815efe500b272e4084ed05eeae7a92b5340.zip | |
x86: Add more disabled features
The original motivation for these patches was for an Intel CPU
feature called MPX. The patch to add a disabled feature for it
will go in with the other parts of the support.
But, in the meantime, there are a few other features than MPX
that we can make assumptions about at compile-time based on
compile options. Add them to disabled-features.h and check them
with cpu_feature_enabled().
Note that this gets rid of the last things that needed an #ifdef
CONFIG_X86_64 in cpufeature.h. Yay!
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: http://lkml.kernel.org/r/20140911211524.C0EC332A@viggo.jf.intel.com
Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/include/asm/disabled-features.h')
| -rw-r--r-- | arch/x86/include/asm/disabled-features.h | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/arch/x86/include/asm/disabled-features.h b/arch/x86/include/asm/disabled-features.h index 1a9955dbf0a0..97534a7d38e3 100644 --- a/arch/x86/include/asm/disabled-features.h +++ b/arch/x86/include/asm/disabled-features.h @@ -10,13 +10,25 @@ * cpu_feature_enabled(). */ +#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 0 +#define DISABLED_MASK0 (DISABLE_VME) #define DISABLED_MASK1 0 #define DISABLED_MASK2 0 -#define DISABLED_MASK3 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 |