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[Xen-devel] Using arch/x86_64/pci-dma in x86_64 Xen

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Subject: [Xen-devel] Using arch/x86_64/pci-dma in x86_64 Xen
From: "Langsdorf, Mark" <mark.langsdorf@xxxxxxx>
Date: Thu, 4 May 2006 09:57:35 -0500
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Thread-topic: Using arch/x86_64/pci-dma in x86_64 Xen
The current implementation of pci-dma in x86_64 Xen
Linux is to use the i386 implementation.  I don't
believe this is sustainable in the long term, as
x86_64 Xen is going to need more DMA solutions than
just SWIOTLB and plain hardware as various IOMMU 
implementations arrive.  

The mainstream kernel has a clean abstraction layer
with the dma_ops that should be portable to Xen dom0
and domU.  I've started implementing this in a
pci-dma-xen for x86_64 Xen Linux.  Am I stepping on 
anyone's toes or is there anyone I should be 
co-ordinating this with?

-Mark Langsdorf
AMD, Inc.

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