linux-kernel - Re: [PATCH 1/2] arm: msm: Add System MMU support.

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Message-Id: <201007281039.44883.arnd@arndb.de>
Date:	Wed, 28 Jul 2010 10:39:44 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Stepan Moskovchenko <stepanm@...eaurora.org>
Cc:	dwalker@...eaurora.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 1/2] arm: msm: Add System MMU support.

On Wednesday 28 July 2010 00:41:06 Stepan Moskovchenko wrote:
> 
> Add support for the System MMUs found on the 8x60 and 8x72
> families of Qualcomm chips. These SMMUs allow virtualization
> of the address space used by most of the multimedia cores
> on these chips.
> 

How is this different from an IOMMU?

>From a very brief look, it seems that you should be using the
existing dma-mapping APIs here instead of making up your own.

	Arnd
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