linux-kernel - Re: [ANNOUNCE] iommu-2.6.git tree

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Date:	Mon, 20 Oct 2008 12:32:43 +0900
From:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	joro@...tes.org
Cc:	dwmw2@...radead.org, mingo@...e.hu,
	iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	fenghua.yu@...el.com, tony.luck@...el.com,
	suresh.b.siddha@...el.com, sfr@...b.auug.org.au,
	andreas.herrmann3@....com, joseph.cihula@...el.com,
	akpm@...ux-foundation.org, jbarnes@...tuousgeek.org,
	tglx@...utronix.de, torvalds@...ux-foundation.org
Subject: Re: [ANNOUNCE] iommu-2.6.git tree

On Sun, 19 Oct 2008 23:23:27 +0200
Joerg Roedel <joro@...tes.org> wrote:

> On Sun, Oct 19, 2008 at 02:21:14PM +0100, David Woodhouse wrote:
> > I thought you and Thomas were working together, and I spoke to Thomas
> > about it during the Kernel Summit. Unless I'm very much mistaken, he
> > agreed that it makes sense to have a separate, real, git tree for
> > cross-platform IOMMU-related work.
> 
> Is there any cross-platform IOMMU-related work outside the Intel IOMMU
> development?

IA64 and PARISC uses the same IOMMU hardware but they duplicate the
driver for them (the drivers are very similar). Calgary and POWER also
have similar IOMMU drivers. But I don't think it's worth merging them.

Unless a new cross-platform IOMMU git tree handles DMA-API changes,
there is no point in having such new tree. There is very little
non-architecture-specific IOMMU stuff.
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