Messages in this thread | | | Date | Wed, 19 Oct 2022 10:52:04 +0200 | From | Borislav Petkov <> | Subject | Re: [PATCH 4/6] x86: KVM: Enable AVX-VNNI-INT8 CPUID and expose it to guest |
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On Wed, Oct 19, 2022 at 04:47:32PM +0800, Jiaxi Chen wrote: > AVX-VNNI-INT8 is a new set of instructions in the latest Intel platform > Sierra Forest. It multiplies the individual bytes of two unsigned or > unsigned source operands, then add and accumulate the results into the > destination dword element size operand. This instruction allows for the > platform to have superior AI capabilities. > > The bit definition: > CPUID.(EAX=7,ECX=1):EDX[bit 4] > > This patch enables this CPUID in the kernel feature bits and expose it to > guest OS. Since the CPUID involves a bit of EDX (EAX=7,ECX=1) which has not > been enumerated yet, this patch adds CPUID_7_1_EDX to CPUID subleaves. At > the same time, word 20 is newly-defined in CPU features for CPUID level
For all your commit messages:
Avoid having "This patch" or "This commit" in the commit message. It is tautologically useless.
Also, do
$ git grep 'This patch' Documentation/process
for more details.
For this particular one, use scattered.c instead of adding a new leaf.
Thx.
-- Regards/Gruss, Boris.
https://people.kernel.org/tglx/notes-about-netiquette
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