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Date:	Tue, 26 Jun 2007 17:33:58 +0200
From:	Andi Kleen <>
To:	Arjan van de Ven <>
Cc:	Andi Kleen <>,
	Muli Ben-Yehuda <>,
	Andrew Morton <>,
	"Keshavamurthy, Anil S" <>,,,,,,
Subject: Re: [Intel IOMMU 00/10] Intel IOMMU support, take #2

On Tue, Jun 26, 2007 at 08:15:05AM -0700, Arjan van de Ven wrote:
> >
> >Also the user interface for X server case needs more work.
> >
> actually with the mode setting of X moving into the kernel... X won't 
> use /dev/mem anymore at all

We'll see if that happens. It has been talked about forever,
but results are sparse. 

> (and I think it mostly already doesn't even without that)

It uses /sys/bus/pci/* which is not any better as seen from the IOMMU.

Any interface will need to be explicit because user space needs to know which
DMA addresses to put into the hardware. It's not enough to just transparently
translate the mappings.


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