linux-kernel - Re: 3.6.11 AMD-Vi: Completion-Wait loop timed out

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Date:	Mon, 21 Jan 2013 15:55:21 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Udo van den Heuvel <udovdh@...all.nl>
Cc:	Jörg Rödel <joro@...tes.org>,
	linux-kernel@...r.kernel.org,
	Boris Ostrovsky <boris.ostrovsky@....com>,
	Jacob Shin <jacob.shin@....com>
Subject: Re: 3.6.11  AMD-Vi: Completion-Wait loop timed out

On Mon, Jan 21, 2013 at 03:10:19PM +0100, Udo van den Heuvel wrote:
> On 2013-01-21 14:09, Borislav Petkov wrote:
> >> Let's see what happens...
> > 
> > Btw, while we're at it, here's some more h0rkage from my PD box:
> > 
> > [    0.220022] [Firmware Bug]: AMD-Vi: IOAPIC[9] not in IVRS table
> > [    0.220078] [Firmware Bug]: AMD-Vi: IOAPIC[10] not in IVRS table
> > [    0.220132] [Firmware Bug]: AMD-Vi: No southbridge IOAPIC found in IVRS table
> > [    0.220187] AMD-Vi: Disabling interrupt remapping due to BIOS Bug(s)
> 
> I have:
> 
> # dmesg|grep -i amd-vi
> [    1.125636] AMD-Vi: Found IOMMU at 0000:00:00.2 cap 0x40
> [    1.125701] AMD-Vi:  Extended features:  PreF PPR GT IA
> [    1.131725] AMD-Vi: Lazy IO/TLB flushing enabled
> 
> Is that 'OK'?

That's simply dumping the IOMMU extended features and yes, it is ok.

Mine happen when enabling CONFIG_IRQ_REMAP and they're somewhat related.
Anyways, I decided to show them to Joerg so that he's aware.

Btw, you could try enabling that on your machine and see whether IRQ
remapping works there.

Thanks.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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