On 17.08.2010, at 20:28, Scott Wood wrote:

On Tue, 17 Aug 2010 15:57:56 +0200
Alexander Graf [off-list ref] wrote:
=20

quoted

There are some heuristics in the PPC power management code that try =

to find

quoted

out if the particular hardware we're running on supports proper power =

management

quoted

or just hangs the machine when going into nap mode.
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Since we know that KVM is safe with nap, let's force enable it in the =

PV code

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once we're certain that we are on a KVM VM.

=20
Could this cause the cache to be flushed unnecessarily on e500?  Where
available, doze would probably be better for signalling the hypervisor
that the guest is idle.

You're right - this should be #ifdef'ed on Book3s. I'll add that as a =
patch on top, as Qemu on BookE doesn't expose KVM capabilities yet.


Alex