linux-kernel - Re: Blacklist DMAR on Intel G31/G33 chipsets

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Message-Id: <1220444531.2985.124.camel@pmac.infradead.org>
Date:	Wed, 03 Sep 2008 13:22:11 +0100
From:	David Woodhouse <dwmw2@...radead.org>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	linux-kernel@...r.kernel.org, arjan@...radead.org,
	"Sankaran, Rajesh" <rajesh.sankaran@...el.com>,
	"Bork, Jon" <jon.bork@...el.com>
Subject: Re: Blacklist DMAR on Intel G31/G33 chipsets

On Wed, 2008-09-03 at 14:09 +0200, Andi Kleen wrote:
> > @@ -114,6 +128,10 @@ static struct chipset early_qrk[] __initdata = {
> >  	  PCI_CLASS_BRIDGE_PCI, PCI_ANY_ID, QFLAG_APPLY_ONCE, via_bugs },
> >  	{ PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB,
> >  	  PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, fix_hypertransport_config },
> > +#ifdef CONFIG_DMAR
> > +	{ PCI_VENDOR_ID_INTEL, 0x29c0,
> > +	  PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, intel_g33_dmar },
> > +#endif
> 
> Are you sure 0x29c0 is only used on the G31/G33?

And P35 and P31, but nothing with an IOMMU, I believe. The G35 is
8086:2980.

But still I'd be slightly happier using a DMI match on the only
_motherboard_ we've seen so far with this BIOS bug. We can easily add
new motherboards if it does show up elsewhere.

-- 
David Woodhouse                            Open Source Technology Centre
David.Woodhouse@...el.com                              Intel Corporation



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