Re: [kvm-devel] [Qemu-devel] Re: expose host CPU features to guests

[Avi Kivity]

Paul Brook wrote:
> > > What you really want to do is ask your virtualization module what
> > > features it supports.
> > >       
> > Yes, that needs to be an additional filter.
> >     
>
> I'd have thought that would be the *only* interesting set for autodetection.
>
>   

Yes, you're right.  It's pointless to issue cpuid in userspace and mask 
it in the kernel; rather we can issue it in the kernel , mask out 
unsupported features, and return it to userspace.

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