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| author | Andy Lutomirski <luto@kernel.org> | 2018-11-19 14:45:27 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-11-20 08:44:28 +0100 |
| commit | dae0a10593007d049ea71601357ac41d4f247ee9 (patch) | |
| tree | 7ce8a6b10d6c767647f121beee058e1c602af701 /arch/x86/include/asm | |
| parent | 6344be608c039f3a787f1144c46fcb04c0f76561 (diff) | |
| download | linux-0-day-dae0a10593007d049ea71601357ac41d4f247ee9.tar.gz linux-0-day-dae0a10593007d049ea71601357ac41d4f247ee9.tar.xz | |
x86/cpufeatures, x86/fault: Mark SMAP as disabled when configured out
Add X86_FEATURE_SMAP to the disabled features mask as appropriate
and use cpu_feature_enabled() in the fault code. This lets us get
rid of a redundant IS_ENABLED(CONFIG_X86_SMAP).
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Yu-cheng Yu <yu-cheng.yu@intel.com>
Link: http://lkml.kernel.org/r/fe93332eded3d702f0b0b4cf83928d6830739ba3.1542667307.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm')
| -rw-r--r-- | arch/x86/include/asm/disabled-features.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/x86/include/asm/disabled-features.h b/arch/x86/include/asm/disabled-features.h index 33833d1909afd..a5ea841cc6d22 100644 --- a/arch/x86/include/asm/disabled-features.h +++ b/arch/x86/include/asm/disabled-features.h @@ -16,6 +16,12 @@ # define DISABLE_MPX (1<<(X86_FEATURE_MPX & 31)) #endif +#ifdef CONFIG_X86_SMAP +# define DISABLE_SMAP 0 +#else +# define DISABLE_SMAP (1<<(X86_FEATURE_SMAP & 31)) +#endif + #ifdef CONFIG_X86_INTEL_UMIP # define DISABLE_UMIP 0 #else @@ -68,7 +74,7 @@ #define DISABLED_MASK6 0 #define DISABLED_MASK7 (DISABLE_PTI) #define DISABLED_MASK8 0 -#define DISABLED_MASK9 (DISABLE_MPX) +#define DISABLED_MASK9 (DISABLE_MPX|DISABLE_SMAP) #define DISABLED_MASK10 0 #define DISABLED_MASK11 0 #define DISABLED_MASK12 0 |