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

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Message-ID: <20110419072520.GD25353@elte.hu>
Date:	Tue, 19 Apr 2011 09:25:20 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	"Roedel, Joerg" <Joerg.Roedel@....com>
Cc:	"H. Peter Anvin" <hpa@...nel.org>, 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


* Roedel, Joerg <Joerg.Roedel@....com> wrote:

> On Mon, Apr 18, 2011 at 11:50:33AM -0400, Ingo Molnar wrote:
> > 
> > * Roedel, Joerg <Joerg.Roedel@....com> wrote:
> > 
> > > 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.
> > 
> > Does the file want to be renamed to pci-amd_gart_64.c or so?
> 
> Hmm, that seems long. How about just amd64_gart.c?

Sure.

Thanks,

	Ingo
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