linux-kernel - Re: [PATCH] add iommu_num

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Message-ID: <20080725141425.GB7493@amd.com>
Date:	Fri, 25 Jul 2008 16:14:25 +0200
From:	Joerg Roedel <joerg.roedel@....com>
To:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
CC:	mingo@...hat.com, tglx@...utronix.de, linux-kernel@...r.kernel.org,
	iommu@...ts.linux-foundation.org, bhavna.sarathy@....com,
	robert.richter@....com
Subject: Re: [PATCH] add iommu_num_pages helper function

On Fri, Jul 25, 2008 at 10:57:24PM +0900, FUJITA Tomonori wrote:
> On Fri, 25 Jul 2008 15:41:59 +0200
> Joerg Roedel <joerg.roedel@....com> wrote:
> > 
> > Is there any other architecture independent way to find out the page
> > size the IOMMU is using? If yes I can rework that patchset.
> 
> There isn't now, I think.
>

Ok.

> 
> > If not, I suggest that we (you?) introduce one in a follow-on patch
> > series and fix the iommu_num_pages function then.
> 
> That's fine by me. Or I could try to find a solution and submit new
> patchset with your AMD and GART patches.

Thats also possible. But I prefer to fix that incrementally and merge
this first step.

> BTW, I prefer to push this patchset via -mm rather than x86 since
> after all we need to clean up all the IOMMUs.

Push it through -mm would make sense since it touches generic code in
lib/. On the other side in x86 we would avoid merge conflicts with
updates in AMD IOMMU and GART code.

Joerg

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