From mboxrd@z Thu Jan  1 00:00:00 1970
From: Holger Steinhaus <hsteinhaus@gmx.de>
Subject: Re: Writing MSRs from Domain0
Date: Fri, 06 Oct 2006 14:23:03 +0200
Message-ID: <45264AA7.9060702@gmx.de>
References: <C14BDE70.2251%Keir.Fraser@cl.cam.ac.uk>
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> Add the powernow MSRs to the white list (a switch statement ;-) in
> emulate_privileged_op in xen/arch/x86/traps.c. This will allow the write to
> succeed. Ensure you have a 1:1 correspondence between virtual CPUs and
> physical CPUs for domain 0 (i.e., VCPU0 pinned to PPU0, etc). Cross your
> fingers. :-)
>   
Thanks, thats the solution for my problem.

Unfortunately, Xen now runs into timer trouble, if the frequency
switches ("Time went backwards"). This problem seems to be caused by the
PIT timer, as the recommended HPET timer is not supported by my hardware.

Regards,
  Holger