linux-kernel - Re: GART_IOMMU without AGP

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Date:	Thu, 23 Jul 2009 00:34:14 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Dave Jones <davej@...hat.com>
Cc:	Pavel Vasilyev <pavel@...linux.ru>, linux-kernel@...r.kernel.org
Subject: Re: GART_IOMMU without AGP

Dave Jones <davej@...hat.com> writes:

> On Wed, Jul 22, 2009 at 07:26:49PM +0400, Pavel Vasilyev wrote:
>  > In the kernel configuration, if I choose x86_64 and PCI, then choose the item
>  > "Garth IOMMU support", which, in turn, chooses not to switch off, support for
>  > AGP. But many IOMMU system does not have AGP bus.
>  
> The lack of AGP slots doesn't mean a lack of AGP bus.
> It's part of the K8 on-CPU northbridge.

Right. 

One thing that could be done today is to remove the "if EMBEDDED" for
GART_IOMMU though. I don't think it's still deserved, as long as
SWIOTLB is enabled.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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