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Commit 8e5780fd authored by Fenghua Yu's avatar Fenghua Yu Committed by H. Peter Anvin
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x86, AVX-512: AVX-512 Feature Detection 

AVX-512 is an extention of AVX2. Its spec can be found at:
http://download-software.intel.com/sites/default/files/managed/71/2e/319433-017.pdf



This patch detects AVX-512 features by CPUID.

Signed-off-by: default avatarFenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1392931491-33237-1-git-send-email-fenghua.yu@intel.com


Signed-off-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
Cc: <stable@vger.kernel.org> # hw enabling
parent 6d0abeca

arch/x86/include/asm/cpufeature.h

+4 −0
Original line number Diff line number Diff line
@@ -217,9 +217,13 @@ 
#define X86_FEATURE_INVPCID	(9*32+10) /* Invalidate Processor Context ID */

#define X86_FEATURE_RTM		(9*32+11) /* Restricted Transactional Memory */

#define X86_FEATURE_MPX		(9*32+14) /* Memory Protection Extension */

#define X86_FEATURE_AVX512F	(9*32+16) /* AVX-512 Foundation */

#define X86_FEATURE_RDSEED	(9*32+18) /* The RDSEED instruction */

#define X86_FEATURE_ADX		(9*32+19) /* The ADCX and ADOX instructions */

#define X86_FEATURE_SMAP	(9*32+20) /* Supervisor Mode Access Prevention */

#define X86_FEATURE_AVX512PF	(9*32+26) /* AVX-512 Prefetch */

#define X86_FEATURE_AVX512ER	(9*32+27) /* AVX-512 Exponential and Reciprocal */

#define X86_FEATURE_AVX512CD	(9*32+28) /* AVX-512 Conflict Detection */



/*

 * BUG word(s)