From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeremy Fitzhardinge <jeremy@goop.org>
Subject: Re: ATI radeon fails with "iommu=soft swiotlb=force"
 (seen on	RV730/RV740 and RS780/RS800)
Date: Thu, 01 Oct 2009 13:03:20 -0700
Message-ID: <4AC50B08.7060405@goop.org>
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	<4AC4FDEA.3070909@goop.org>
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To: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: dri-devel@lists.sourceforge.net, xen-devel@lists.xensource.com, JBeulich@novell.com
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On 10/01/09 12:21, Konrad Rzeszutek Wilk wrote:
> The are other users of 'vmalloc_32' that look like they depend on this
> memory being under the 4GB mark. Most of them are do video capture through
> USB - so it probably is limited to only accessing up to 4GB.
>   

Hm.  The only sane way I can see of doing that is to make sure all the
pages in the DMA32 zone are below 4G.  But that's going to get difficult
if you want more than just dom0 to support device access...

    J