[PATCH 3.13 018/151] x86, AVX-512: AVX-512 Feature Detection

From: Kamal Mostafa
Date: Fri May 02 2014 - 12:25:41 EST


3.13.11.1 -stable review patch. If anyone has any objections, please let me know.

------------------

From: Fenghua Yu <fenghua.yu@xxxxxxxxx>

commit 8e5780fdeef7dc490b3f0b3a62704593721fa4f3 upstream.

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: Fenghua Yu <fenghua.yu@xxxxxxxxx>
Link: http://lkml.kernel.org/r/1392931491-33237-1-git-send-email-fenghua.yu@xxxxxxxxx
Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
arch/x86/include/asm/cpufeature.h | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index 89270b4..1e49a03 100644
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -216,9 +216,13 @@
#define X86_FEATURE_ERMS (9*32+ 9) /* Enhanced REP MOVSB/STOSB */
#define X86_FEATURE_INVPCID (9*32+10) /* Invalidate Processor Context ID */
#define X86_FEATURE_RTM (9*32+11) /* Restricted Transactional Memory */
+#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)
--
1.9.1

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