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SubjectRe: [RFC] CPUID usage for interaction between Hypervisors and Linux.
On Wed, 2008-10-01 at 10:21 -0700, H. Peter Anvin wrote:
> Alok Kataria wrote:
> >
> > (This proposal may be adopted by other guest OSes. However, that is not
> > a requirement because a hypervisor can expose a different CPUID
> > interface depending on the guest OS type that is specified by the VM
> > configuration.)
> >
> Excuse me, but that is blatantly idiotic. Expecting the user having to
> configure a VM to match the target OS is *exactly* as stupid as
> expecting the user to reconfigure the BIOS. It's totally the wrong
> thing to do.

Hi Peter,

Its not a user who has to do anything special here.
There are *intelligent* VM developers out there who can export a
different CPUid interface depending on the guest OS type. And this is
what most of the hypervisors do (not necessarily for CPUID, but for
other things right now).

> -hpa

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