This is a note to let you know that I've just added the patch titled
x86, AVX-512: AVX-512 Feature Detection
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
x86-avx-512-avx-512-feature-detection.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 8e5780fdeef7dc490b3f0b3a62704593721fa4f3 Mon Sep 17 00:00:00 2001
From: Fenghua Yu <[email protected]>
Date: Thu, 20 Feb 2014 13:24:50 -0800
Subject: x86, AVX-512: AVX-512 Feature Detection
From: Fenghua Yu <[email protected]>
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 <[email protected]>
Link:
http://lkml.kernel.org/r/[email protected]
Signed-off-by: H. Peter Anvin <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/x86/include/asm/cpufeature.h | 4 ++++
1 file changed, 4 insertions(+)
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -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)
Patches currently in stable-queue which might be from [email protected] are
queue-3.14/x86-avx-512-enable-avx-512-states-context-switch.patch
queue-3.14/x86-avx-512-avx-512-feature-detection.patch
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