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Date: Mon, 21 Jan 2013 10:04:50 -0600
From: Jacob Shin <jacob.shin@amd.com>
To: Borislav Petkov <bp@alien8.de>,
        =?iso-8859-1?Q?J=F6rg_R=F6del?= <joro@8bytes.org>,
        Udo van den Heuvel <udovdh@xs4all.nl>, <linux-kernel@vger.kernel.org>,
        Boris Ostrovsky <boris.ostrovsky@amd.com>
CC: <Suravee.Suthikulpanit@amd.com>
Subject: Re: 3.6.11  AMD-Vi: Completion-Wait loop timed out
Message-ID: <20130121160450.GA24792@jshin-Toonie>
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On Sun, Jan 20, 2013 at 12:48:28PM +0100, Borislav Petkov wrote:
> On Sun, Jan 20, 2013 at 12:40:11PM +0100, Jörg Rödel wrote:
> > Yes, the BIOS vendor can fix this issue. They need to disable NB clock
> > gating for the IOMMU.
> 
> Right, Udo, you can try Gigabyte first.
> 
> Btw, can't we add a quirk to disable NB clock gating? Maybe Boris and
> Jacob could help. CCed.

Hi, yes we will try and reproduce the NB clock gating issue on our
end and submit a patch ASAP.

And Boris P., I think your IOAPIC not in IVRS issue we've also seen
something similar recently (on Xen), so we'll atempt to tackle that
one too afterwards.

-Jacob

> 
> Guys, the error description is at
> http://marc.info/?l=linux-kernel&m=135867802432660
> 
> Thanks.
> 
> -- 
> Regards/Gruss,
>     Boris.
> 
> Sent from a fat crate under my desk. Formatting is fine.
> --
>