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

From Borislav Petkov <bp@alien8.de>
Newsgroups linux.kernel
Subject Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS features to kvm guest
Date 2016-10-28 14:30 +0200
Message-ID <sxesh-8hw-3@gated-at.bofh.it> (permalink)
References <sxbup-6lx-17@gated-at.bofh.it> <sxcqt-6Y9-11@gated-at.bofh.it> <sxcqt-6Y9-21@gated-at.bofh.it> <sxdcR-7xJ-29@gated-at.bofh.it> <sxe8W-885-21@gated-at.bofh.it>
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On Fri, Oct 28, 2016 at 02:07:21PM +0200, Paolo Bonzini wrote:
> cpuid_count_edx would be just
> 
> static inline unsigned int cpuid_count_edx(unsigned op, unsigned count)
> {
>         unsigned int eax, ebx, ecx, edx;
> 
>         cpuid_count(op, count, &eax, &ebx, &ecx, &edx);
> 
>         return edx;
> }

Even better.

But shouldn't this be hiding unimplemented CPUID bits from the guest?

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.

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Thread

[PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS features to kvm guest He Chen <he.chen@linux.intel.com> - 2016-10-28 11:20 +0200
  Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS  features to kvm guest Paolo Bonzini <pbonzini@redhat.com> - 2016-10-28 11:40 +0200
    Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS  features to kvm guest He Chen <he.chen@linux.intel.com> - 2016-10-28 11:50 +0200
      Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS  features to kvm guest He Chen <he.chen@linux.intel.com> - 2016-10-28 12:00 +0200
      Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS  features to kvm guest Paolo Bonzini <pbonzini@redhat.com> - 2016-10-28 12:00 +0200
  Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS  features to kvm guest "Luc, Piotr" <Piotr.Luc@intel.com> - 2016-10-28 12:20 +0200
    Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS  features to kvm guest Paolo Bonzini <pbonzini@redhat.com> - 2016-10-28 12:20 +0200
      Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS  features to kvm guest Borislav Petkov <bp@alien8.de> - 2016-10-28 13:10 +0200
        Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS  features to kvm guest Paolo Bonzini <pbonzini@redhat.com> - 2016-10-28 14:10 +0200
          Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS  features to kvm guest Borislav Petkov <bp@alien8.de> - 2016-10-28 14:30 +0200
            Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS  features to kvm guest Borislav Petkov <bp@alien8.de> - 2016-10-29 14:30 +0200
              Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS  features to kvm guest Paolo Bonzini <pbonzini@redhat.com> - 2016-10-29 14:50 +0200
                Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS  features to kvm guest Borislav Petkov <bp@alien8.de> - 2016-10-29 15:00 +0200
                Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS  features to kvm guest Paolo Bonzini <pbonzini@redhat.com> - 2016-10-29 15:30 +0200
            Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS  features to kvm guest Paolo Bonzini <pbonzini@redhat.com> - 2016-10-29 14:30 +0200
              Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS  features to kvm guest "Luc, Piotr" <Piotr.Luc@intel.com> - 2016-10-31 10:20 +0100
                Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS  features to kvm guest Borislav Petkov <bp@alien8.de> - 2016-10-31 11:00 +0100
                Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS  features to kvm guest "Luc, Piotr" <Piotr.Luc@intel.com> - 2016-10-31 11:20 +0100
                Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS  features to kvm guest Borislav Petkov <bp@alien8.de> - 2016-10-31 11:40 +0100
                Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS  features to kvm guest Paolo Bonzini <pbonzini@redhat.com> - 2016-10-31 11:50 +0100
                Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS  features to kvm guest Borislav Petkov <bp@alien8.de> - 2016-10-31 12:10 +0100
                Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS  features to kvm guest Paolo Bonzini <pbonzini@redhat.com> - 2016-10-31 12:50 +0100
                Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS  features to kvm guest He Chen <he.chen@linux.intel.com> - 2016-11-01 08:50 +0100
                Re: [PATCH] x86/cpuid: expose AVX512_4VNNIW and AVX512_4FMAPS  features to kvm guest Borislav Petkov <bp@alien8.de> - 2016-11-01 09:50 +0100

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