linux-kernel - Re: [PATCH 4/4] x86, gart: Make sure GART does not map physmem above 1TB

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Message-ID: <20110418145941.GJ2192@amd.com>
Date:	Mon, 18 Apr 2011 16:59:41 +0200
From:	"Roedel, Joerg" <Joerg.Roedel@....com>
To:	"H. Peter Anvin" <hpa@...nel.org>
CC:	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"x86@...nel.org" <x86@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"stable@...nel.org" <stable@...nel.org>
Subject: Re: [PATCH 4/4] x86, gart: Make sure GART does not map physmem
 above 1TB

On Mon, Apr 18, 2011 at 10:54:17AM -0400, H. Peter Anvin wrote:
> On 04/18/2011 07:46 AM, H. Peter Anvin wrote:
> > On 04/18/2011 06:45 AM, Joerg Roedel wrote:
> >> The GART can only map physical memory below 1TB. Make sure
> >> the gart driver in the kernel does not try to map memory
> >> above 1TB.
> > 
> > Where does this limit come from?
> 
> Nevermind... despite the generic name of the file it looks to be
> specific to the K8 GART.

Yes, this file mostly contains the dma-ops implementation that uses the
K8 gart plus some k8-gart specific initialization functions.

	Joerg

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