linux-kernel - Re: [linux-dvb] [PATCH] Userspace tuner

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Date:	Fri, 14 Sep 2007 11:57:59 +0400
From:	Manu Abraham <abraham.manu@...il.com>
To:	Markus Rechberger <mrechberger@...il.com>
CC:	Steven Toth <stoth@...ppauge.com>,
	"video4linux-list@...hat.com" <video4linux-list@...hat.com>,
	"linux-dvb@...uxtv.org" <linux-dvb@...uxtv.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>
Subject: Re: [linux-dvb] [PATCH] Userspace tuner

>>> What do you think about IOMMU?
>>>
>>>
>> Just because AMD or INTEL want to invent some whizzy new technology it
>> doesn't say anything about the TV card development and retail business.
>> Intel and AMD have teams of Linux engineers helping operating system
>> developers bring their ideas and technologies to new platforms. That's a
>> million miles away from any of the TV board vendors I know of, who have
>> little or NO fulltime linux developers and consider the < 5% market
>> fringe at best.
>>
> 
> it helps to virtualize devices and introduces newer features for that.
> Some interesting projects could be derrived out of that, there are
> quite a few interesting papers floating around how drivers could be
> handled in future.
> 

IOMMU can be considered similar to the AGP GART, which is similar,
remapping the Addresses, as far as i understand.

Though you get a physical to virtual translation, what about interrupts,
yet to be seen with how to do it with multipath scenarios.

Something that i happened to read
https://www.gelato.unsw.edu.au/archives/comp-arch/2007-March/007370.html
Even Documentation/Intel-IOMMU.txt, doesn't seem to paint a very rosy
picture

Manu
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