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Groups > linux.kernel > #1559931
| From | Borislav Petkov <bp@alien8.de> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v1 1/2] x86/cpufeature: Add AVX512_VPOPCNTDQ feature |
| Date | 2017-01-16 18:30 +0100 |
| Message-ID | <t0jgt-3vr-5@gated-at.bofh.it> (permalink) |
| References | <sY8yR-4e0-19@gated-at.bofh.it> <sY8yR-4e0-23@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Tue, Jan 10, 2017 at 06:34:02PM +0100, Piotr Luc wrote:
> Vector population count instructions for dwords and qwords are to be
> used in future Intel Xeon & Xeon Phi processors. The bit 14 of
> CPUID[level:0x07, ECX] indicates that the new instructions are
> supported by a processor.
>
> The spec can be found in the Intel Software Developer Manual (SDM)
> or in the Instruction Set Extensions Programming Reference (ISE).
>
> Define new feature flag to enumerate the new instructions set in
> /proc/cpuinfo according to new CPUID bit.
> Clear the feature bit in case xsave is disabled.
>
> Signed-off-by: Piotr Luc <piotr.luc@intel.com>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Ingo Molnar <mingo@redhat.com>
> Cc: H. Peter Anvin <hpa@zytor.com>
> Cc: x86@kernel.org
> Cc: linux-kernel@vger.kernel.org
> ---
Reviewed-by: Borislav Petkov <bp@suse.de>
--
Regards/Gruss,
Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
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[PATCH v1 1/2] x86/cpufeature: Add AVX512_VPOPCNTDQ feature Piotr Luc <piotr.luc@intel.com> - 2017-01-10 18:40 +0100 Re: [PATCH v1 1/2] x86/cpufeature: Add AVX512_VPOPCNTDQ feature Borislav Petkov <bp@alien8.de> - 2017-01-16 18:30 +0100 [tip:x86/cpufeature] x86/cpufeature: Add AVX512_VPOPCNTDQ feature tip-bot for Piotr Luc <tipbot@zytor.com> - 2017-01-16 20:50 +0100
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