linux-kernel - Re: data corruption with nvidia chipsets and IDE/SATA drives (k8 cpu errata needed?)

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Message-Id: <200701170829.54540.ak@suse.de>
Date:	Wed, 17 Jan 2007 08:29:53 +1100
From:	Andi Kleen <ak@...e.de>
To:	Chris Wedgwood <cw@...f.org>
Cc:	Christoph Anton Mitterer <calestyo@...entia.net>,
	Robert Hancock <hancockr@...w.ca>,
	linux-kernel@...r.kernel.org, knweiss@....de,
	andersen@...epoet.org, krader@...ibm.com, lfriedman@...dia.com,
	linux-nforce-bugs@...dia.com
Subject: Re: data corruption with nvidia chipsets and IDE/SATA drives (k8 cpu errata needed?)

On Wednesday 17 January 2007 07:31, Chris Wedgwood wrote:
> On Tue, Jan 16, 2007 at 08:52:32PM +0100, Christoph Anton Mitterer wrote:
> > I agree,... it seems drastic, but this is the only really secure
> > solution.
>
> I'd like to here from Andi how he feels about this?  It seems like a
> somewhat drastic solution in some ways given a lot of hardware doesn't
> seem to be affected (or maybe in those cases it's just really hard to
> hit, I don't know).

AMD is looking at the issue. Only Nvidia chipsets seem to be affected,
although there were similar problems on VIA in the past too.
Unless a good workaround comes around soon I'll probably default
to iommu=soft on Nvidia.

-Andi
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