linux-kernel - Re: [PATCH v2 1/4] x86: kvm: Update the reverse_cpuid list to include CPUID_7

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Message-ID: <CALMp9eTdm8nFBg071KD+4tYJ=1TUioDpZBZCsOKvaC5omzMudw@mail.gmail.com>
Date:   Mon, 29 Jan 2018 10:58:53 -0800
From:   Jim Mattson <jmattson@...gle.com>
To:     KarimAllah Ahmed <karahmed@...zon.de>
Cc:     kvm list <kvm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H . Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH v2 1/4] x86: kvm: Update the reverse_cpuid list to include CPUID_7_EDX

On Sun, Jan 28, 2018 at 4:58 PM, KarimAllah Ahmed <karahmed@...zon.de> wrote:
> Cc: Paolo Bonzini <pbonzini@...hat.com>
> Cc: Radim Krčmář <rkrcmar@...hat.com>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: H. Peter Anvin <hpa@...or.com>
> Cc: x86@...nel.org
> Cc: kvm@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Signed-off-by: KarimAllah Ahmed <karahmed@...zon.de>
> ---
>  arch/x86/kvm/cpuid.h | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/arch/x86/kvm/cpuid.h b/arch/x86/kvm/cpuid.h
> index cdc70a3..dcfe227 100644
> --- a/arch/x86/kvm/cpuid.h
> +++ b/arch/x86/kvm/cpuid.h
> @@ -54,6 +54,7 @@ static const struct cpuid_reg reverse_cpuid[] = {
>         [CPUID_8000_000A_EDX] = {0x8000000a, 0, CPUID_EDX},
>         [CPUID_7_ECX]         = {         7, 0, CPUID_ECX},
>         [CPUID_8000_0007_EBX] = {0x80000007, 0, CPUID_EBX},
> +       [CPUID_7_EDX]         = {         7, 0, CPUID_EDX},

I haven't seen the change that introduces CPUID_7_EDX, but shouldn't
it be CPUID_7_0_EDX?

>  };
>
>  static __always_inline struct cpuid_reg x86_feature_cpuid(unsigned x86_feature)
> --
> 2.7.4
>