Re: [RFC] CPUID usage for interaction between Hypervisors and Linux.

[Jeremy Fitzhardinge]

Anthony Liguori wrote:
> Mmm, cpuid bikeshedding :-)

My shade of blue is better.

> > The space 0x40000000-0x400000ff is reserved for hypervisor usage.
> >
> > This region is divided into 16 16-leaf blocks.  Each block has the 
> > structure:
> >
> > 0x400000x0:
> >     eax: max used leaf within the leaf block (max 0x400000xf)
>
> Why even bother with this?  It doesn't seem necessary in your proposal.

It allows someone to incrementally add things to their block in a fairly 
orderly way.  But more importantly, its the prevailing idiom, and the 
existing and proposed cpuid schemes already do this, so they'd fit in as-is.

   J
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