Date: Fri, 13 Nov 2009 21:21:48 +0000
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: lsorense@csclub.uwaterloo.ca (Lennart Sorensen)
Cc: Lennart Sorensen <lsorense@csclub.uwaterloo.ca>,
       Pavel Machek <pavel@ucw.cz>, "H. Peter Anvin" <hpa@zytor.com>,
       Matteo Croce <technoboy85@gmail.com>, Ingo Molnar <mingo@elte.hu>,
       linux-kernel@vger.kernel.org
Subject: Re: i686 quirk for AMD Geode
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> > Which usually means some form of write gathering is enabled or something
> > thinks the device is write combining on the PCI bus. What does the PCI
> > bus and the RCRR MTRR set look like ?
> 
> Well there is no /proc/mtrr.

Linux doesn't have an RCRR driver - so you need to dump the MSRs directly
(see the Geode GX manual MSR list) and read out the msrs.
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