linux-kernel - Re: IOMMU and graphics cards

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Date:	Thu, 07 May 2009 11:22:01 +0100
From:	David Woodhouse <dwmw2@...radead.org>
To:	Joerg Roedel <joerg.roedel@....com>
Cc:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org,
	mingo@...hat.com, airlied@...ux.ie
Subject: Re: IOMMU and graphics cards

On Thu, 2009-05-07 at 12:01 +0200, Joerg Roedel wrote:
> > Looks like the DRM code uses the DMA API.
> 
> The proprietary drivers make problems so far. For the ATI one I am in
> contact with the developers to try to fix it. But I can't do anything
> about the other proprietary driver I am aware of :-(

I see no harm in "breaking" code which was already broken. If that's the
only reason we're enabling the graphics workaround, let's turn it off.

-- 
David Woodhouse                            Open Source Technology Centre
David.Woodhouse@...el.com                              Intel Corporation

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