linux-kernel - Re: i686 quirk for AMD Geode

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Date:	Fri, 13 Nov 2009 21:21:48 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	lsorense@...lub.uwaterloo.ca (Lennart Sorensen)
Cc:	Lennart Sorensen <lsorense@...lub.uwaterloo.ca>,
	Pavel Machek <pavel@....cz>, "H. Peter Anvin" <hpa@...or.com>,
	Matteo Croce <technoboy85@...il.com>,
	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org
Subject: Re: i686 quirk for AMD Geode

> > 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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