Date: Wed, 22 Jul 2009 23:17:38 +0100
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Dave Jones <davej@redhat.com>
Cc: Pavel Vasilyev <pavel@pavlinux.ru>, linux-kernel@vger.kernel.org
Subject: Re: GART_IOMMU without AGP
Message-ID: <20090722231738.21de4deb@lxorguk.ukuu.org.uk>
In-Reply-To: <20090722213746.GA20241@redhat.com>
References: <200907221926.50397.pavel@pavlinux.ru>
	<20090722213746.GA20241@redhat.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1028
Lines: 23

On Wed, 22 Jul 2009 17:37:46 -0400
Dave Jones <davej@redhat.com> wrote:

> 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.

And the user is selecting CONFIG_AGP to select AGP devices rather than to
demonstrate their deep guru grade knowledge of K8 northbridges. Not only
that but CONFIG_AGP controls the display of AGP video card options so it
is a selection for offered devices not really an internal detail.

So I think Pavel is right here.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/