Re: [Xen-devel] Powernow-k8 support

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 15 Jun 2006, at 10:58, Christian Roessner wrote:

> > One thing I'm a bit undecided on is whether MSR emulation is the right
> > way to go, or whether we should just pull the low-level cpufreq 
> > drivers
> > verbatim into Xen and then provide access to them via hypercalls. We
> > could then have a paravirtual cpufreq driver added to Linux. This has
> > the advantage that we have less new per-cpu-type code to maintain in 
> > Xen
> > (we can more easily sync with cpufreq changes in Linux) but it does 
> > mean
> > we change more Linux code and we'd want to be a bit careful not to 
> > make
> > the hypercall interface too Linux specific (or too x86 specific).
> Has this something to do with the private mail I sent to Keir Fraser?
>
> I told him that the powernow-k8 support in dom0 seems to work, while in
> domUs not. Second was that the shown Bogomips under /proc/cpuinfo never
> changes from ~4000, even when the CPU was @ 800.
That's a quite separate issue. The 'stale' frequency info in domU is 
harmless.
 -- Keir


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