linux-kernel - Re: [PATCH 0/3] fix GART to respect device's dma

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Date:	Sun, 14 Sep 2008 16:45:08 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Cc:	joerg.roedel@....com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/3] fix GART to respect device's dma_mask about
	virtual mappings


* FUJITA Tomonori <fujita.tomonori@....ntt.co.jp> wrote:

> Currently, gart IOMMU ignores device's dma_mask when it does virtual
> mappings. So it could give a device a virtual address that the device
> can't access to.
> 
> Some IOMMUs, in x86 IOMMUs GART and Calgary, have this issue. This
> patchset fixes GART.
> 
> The first and second patches add helper functions, useful for some
> IOMMUs (both are taken from POWER IOMMU code). I'll convert some
> IOMMUs to use the functions after they are merged into mainline (to
> avoid complicated dependence on multiple trees).
> 
> This is against tip/x86/iommu plus a patch that I sent yesterday:
> 
> http://lkml.org/lkml/2008/9/11/147.

applied them to tip/x86/iommu:

bee44f2: x86: make GART to respect device's dma_mask about virtual mappings
589fc9a: iommu: add dma_get_mask helper function
eecfffc: iommu: add iommu_device_max_index IOMMU helper function

thanks!

	Ingo
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