linux-kernel - Re: [PATCH]x86/cpufeatures.h: Enumerate A Few New AVX-512 Features

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Date:	Thu, 10 Mar 2016 11:28:11 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Fenghua Yu <fenghua.yu@...el.com>
Cc:	"H. Peter Anvin" <hpa@...ux.intel.com>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ravi V Shankar <ravi.v.shankar@...el.com>,
	linux-kernel <linux-kernel@...r.kernel.org>, x86 <x86@...nel.org>
Subject: Re: [PATCH]x86/cpufeatures.h: Enumerate A Few New AVX-512 Features


* Fenghua Yu <fenghua.yu@...el.com> wrote:

> From: Fenghua Yu <fenghua.yu@...el.com>
> 
> A few new AVX-512 instruction groups/features are added in cpufeatures.h
> for enuermation: AVX512DQ, AVX512BW, and AVX512VL.
> 
> The specification for latest AVX-512 including the features can be found at
> https://software.intel.com/sites/default/files/managed/07/b7/319433-023.pdf
> 
> Signed-off-by: Fenghua Yu <fenghua.yu@...el.com>
> ---
>  arch/x86/include/asm/cpufeature.h | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
> index 7ad8c94..71a5cc4 100644
> --- a/arch/x86/include/asm/cpufeature.h
> +++ b/arch/x86/include/asm/cpufeature.h
> @@ -219,6 +219,7 @@
>  #define X86_FEATURE_CQM		( 9*32+12) /* Cache QoS Monitoring */
>  #define X86_FEATURE_MPX		( 9*32+14) /* Memory Protection Extension */
>  #define X86_FEATURE_AVX512F	( 9*32+16) /* AVX-512 Foundation */
> +#define X86_FEATURE_AVX512DQ	( 9*32+17) /* AVX-512 DQ Instructions */
>  #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 */
> @@ -229,6 +230,8 @@
>  #define X86_FEATURE_AVX512ER	( 9*32+27) /* AVX-512 Exponential and Reciprocal */
>  #define X86_FEATURE_AVX512CD	( 9*32+28) /* AVX-512 Conflict Detection */
>  #define X86_FEATURE_SHA_NI	( 9*32+29) /* SHA1/SHA256 Instruction Extensions */
> +#define X86_FEATURE_AVX512BW	( 9*32+30) /* AVX-512 BW Instructions */
> +#define X86_FEATURE_AVX512VL	( 9*32+31) /* AVX-512 Vector Lengths */
>  
>  /* Extended state features, CPUID level 0x0000000d:1 (eax), word 10 */
>  #define X86_FEATURE_XSAVEOPT	(10*32+ 0) /* XSAVEOPT */

In the latest x86 tree these defines are in cpufeatures.h, not cpufeature.h.

Thanks,

	Ingo