Re: [PATCH 0/2] Enumerate and expose AVX_VNNI feature

Yang Zhong
2021-01-22T06:55:51Z

On Thu, Jan 21, 2021 at 04:02:17PM +0100, Paolo Bonzini wrote:
> On 05/01/21 01:49, Yang Zhong wrote:
> >A processor supports AVX_VNNI instructions if CPUID.(EAX=7,ECX=1):EAX[bit 4]
> >is present.
> >
> >This series includes kernel and kvm patches, kernel patch define this
> >new cpu feature bit and kvm expose this bit to guest. When this bit is
> >enabled on cpu or vcpu, the cpu feature flag is shown as "avx_vnni" in
> >/proc/cpuinfo of host and guest.
> >
> >Detailed information on the instruction and CPUID feature flag can be
> >found in the latest "extensions" manual [1].
> >
> >Reference:
> >[1]. https://software.intel.com/content/www/us/en/develop/download/intel-architecture-instruction-set-extensions-programming-reference.html
> >
> >
> >Kyung Min Park (1):
> > Enumerate AVX Vector Neural Network instructions
> >
> >Yang Zhong (1):
> > KVM: Expose AVX_VNNI instruction to guset
> >
> > arch/x86/include/asm/cpufeatures.h | 1 +
> > arch/x86/kvm/cpuid.c | 2 +-
> > 2 files changed, 2 insertions(+), 1 deletion(-)
> >
>
> Queued, thanks.
>
> Paolo

Paolo, thanks, i will send the related Qemu patch soon.

Yang