linux-kernel - Re: [sodaville] [PATCH 03/11] x86/dtb: Add a device tree for CE4100

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Message-ID: <1291060994.32570.296.camel@pasglop>
Date:	Tue, 30 Nov 2010 07:03:14 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	"H. Peter Anvin" <hpa@...ux.intel.com>
Cc:	Mitch Bradley <wmb@...mworks.com>,
	devicetree-discuss@...ts.ozlabs.org, sodaville@...utronix.de,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [sodaville] [PATCH 03/11] x86/dtb: Add a device tree for CE4100

On Mon, 2010-11-29 at 10:26 -0800, H. Peter Anvin wrote:
> > The OLPC interface might be of some use as a starting point, but would 
> > need some work.  It is currently in use on AMD Geode, Via C7, and Intel 
> > Atom based systems, but, among other issues, it conflicts with the 
> > Physical Address Extension feature.
> > 
> 
> It conflicts with at least PAE, PAT and x86-64.  Since NX requires PAE,
> it also conflicts with that.  As such, I would think it would have to be
> considered obsolete. 

In any case, what is of interest to Sebastian here isn't the ABI for the
client interface, but the properties to put in the /cpus/ nodes, so we
could start with that...

Cheers,
Ben.


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