RE: [Xen-devel] Powernow-k8 support

["Langsdorf, Mark" <mark.langsdorf@xxxxxxx>]

> On 12 Jun 2006, at 17:00, Langsdorf, Mark wrote:
> 
> >> Edit source file arch/i386/kernel/cpu/cpufreq/powernow-k8.c
> >> and change use of phys_to_virt() to isa_bus_to_virt().
> >
> > Is this a change that needs to made in the mainstream driver?  It's 
> > only called in the legacy PSB code, and AMD is deprecating 
> support for 
> > PSB on newer processors.
> 
> It can be assessed when we actually support Powernow in Xen. 
> As you say this is legacy code anyway, so we may not care so 
> much (depends when it became legacy?).

Older laptops support it.  New laptops, sometimes but not
often.  It will not be part of the BIOS/UEFI for processors 
by 2008.  No multiprocessor system has it.

So it's support for some amount of the installed base, but
I don't know how much.

-Mark Langsdorf
AMD, Inc.


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