Re: Use CPUID to communicate with the hypervisor.

[H. Peter Anvin]

Alok Kataria wrote:
> > >
> > This is great, obviously... although we'll have to deal with legacy
> > methods for a while if not indefinitely (just as we have to for
> > pre-CPUID processors).
>
> Ok, do you think we should keep those (legacy) interfaces separate so
> that they can be phased out whenever the time is right. 

I don't, realistically, think we can phase them out for a very long 
time, and then it's usually a "why bother".  What we want to do is 
abstract them so they don't make the rest of the code suck.

> I would like to see this as a generic hypervisor way to get frequency
> rather than a VMware specific thingy. 
> > In order for *that* to be safe, you'd have to have well-defined ranges
> > for different virtualization vendors where each of them can define their
> > own stuff.
>
> My motivation for doing this is to have a standard across all the
> hypervisor's. If all the different hypervisor guys can come to some
> sought of consensus on the various hypervisor leafs that would help keep
> this simple and a lot more maintainable.

Agreed.  However, that's obviously beyond our immediate control.

	-hpa
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