Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS features to kvm guest

From: Borislav Petkov
Date: Mon Oct 31 2016 - 05:53:21 EST


On Mon, Oct 31, 2016 at 09:15:43AM +0000, Luc, Piotr wrote:
> I think that in v4.9-rc2 theÂCPUID[7,0].edx bits can be masked out by
> applying noxsave to cmdline. Using directly cpu_count will result in
> passing the bits in edx to a guest directly while the xsaveopt and rest
> of AVX512 features bits will be cleared.Â

Errr, I can't parse that reading it backwards and forwards. Please
elaborate.

--
Regards/Gruss,
Boris.

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