Messages in this thread Patch in this message | | | Subject | [RFC][PATCH 3/3] x86: make MP a required-feature on 64-bit | From | Dave Hansen <> | Date | Fri, 20 Jun 2014 09:17:40 -0700 |
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Today, we assume that all 64-bit cpus have X86_FEATURE_MP. It should be in the REQUIRED_MASK so that we do not need the #undef trick for it.
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b/arch/x86/include/asm/cpufeature.h | 3 --- b/arch/x86/include/asm/required-features.h | 4 +++- 2 files changed, 3 insertions(+), 4 deletions(-)
diff -puN arch/x86/include/asm/cpufeature.h~x86-make-mp-required_feature arch/x86/include/asm/cpufeature.h --- a/arch/x86/include/asm/cpufeature.h~x86-make-mp-required_feature 2014-06-20 09:16:10.180396969 -0700 +++ b/arch/x86/include/asm/cpufeature.h 2014-06-20 09:16:10.185397194 -0700 @@ -362,9 +362,6 @@ extern const char * const x86_power_flag #undef cpu_has_pae #define cpu_has_pae ___BUG___ -#undef cpu_has_mp -#define cpu_has_mp 1 - #endif /* CONFIG_X86_64 */ #if __GNUC__ >= 4 diff -puN arch/x86/include/asm/required-features.h~x86-make-mp-required_feature arch/x86/include/asm/required-features.h --- a/arch/x86/include/asm/required-features.h~x86-make-mp-required_feature 2014-06-20 09:16:10.182397059 -0700 +++ b/arch/x86/include/asm/required-features.h 2014-06-20 09:16:10.186397240 -0700 @@ -67,6 +67,7 @@ #define NEED_XMM (1<<(X86_FEATURE_XMM & 31)) #define NEED_XMM2 (1<<(X86_FEATURE_XMM2 & 31)) #define NEED_LM (1<<(X86_FEATURE_LM & 31)) +#define NEED_MP (1<<(X86_FEATURE_MP & 31)) #else #define NEED_PSE 0 #define NEED_MSR 0 @@ -75,6 +76,7 @@ #define NEED_XMM 0 #define NEED_XMM2 0 #define NEED_LM 0 +#define NEED_MP 0 #endif #define REQUIRED_MASK0 (NEED_FPU|NEED_PSE|NEED_MSR|NEED_PAE|\ @@ -82,7 +84,7 @@ NEED_XMM|NEED_XMM2) #define SSE_MASK (NEED_XMM|NEED_XMM2) -#define REQUIRED_MASK1 (NEED_LM|NEED_3DNOW) +#define REQUIRED_MASK1 (NEED_LM|NEED_3DNOW|NEED_MP) #define REQUIRED_MASK2 0 #define REQUIRED_MASK3 (NEED_NOPL) _
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