Re: [PATCH] kvm: x86: Add "significant index" flag to a few CPUID leaves

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On Thu, Sep 12, 2019 at 10:41 AM Krish Sadhukhan
<krish.sadhukhan@xxxxxxxxxx> wrote:
>
>
> On 9/12/19 9:55 AM, Jim Mattson wrote:
> > According to the Intel SDM, volume 2, "CPUID," the index is
> > significant (or partially significant) for CPUID leaves 0FH, 10H, 12H,
> > 17H, 18H, and 1FH.
> >
> > Add the corresponding flag to these CPUID leaves in do_host_cpuid().
> >
> > Signed-off-by: Jim Mattson <jmattson@xxxxxxxxxx>
> > Reviewed-by: Peter Shier <pshier@xxxxxxxxxx>
> > Reviewed-by: Steve Rutherford <srutherford@xxxxxxxxxx>
> > Fixes: a87f2d3a6eadab ("KVM: x86: Add Intel CPUID.1F cpuid emulation support")
> > ---
> >   arch/x86/kvm/cpuid.c | 6 ++++++
> >   1 file changed, 6 insertions(+)
> >
> > diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
> > index 22c2720cd948e..e7d25f4364664 100644
> > --- a/arch/x86/kvm/cpuid.c
> > +++ b/arch/x86/kvm/cpuid.c
> > @@ -304,7 +304,13 @@ static void do_host_cpuid(struct kvm_cpuid_entry2 *entry, u32 function,
> >       case 7:
> >       case 0xb:
> >       case 0xd:
> > +     case 0xf:
> > +     case 0x10:
> > +     case 0x12:
> >       case 0x14:
> > +     case 0x17:
> > +     case 0x18:
> > +     case 0x1f:
> >       case 0x8000001d:
> >               entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
> >               break;
>
>
> Reviewed-by: Krish Sadhukhan <krish.sadhukhan@xxxxxxxxxx>


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