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xen-devel
Re: [Xen-devel] Using arch/x86_64/pci-dma in x86_64 Xen
On Thu, May 04, 2006 at 09:57:35AM -0500, Langsdorf, Mark wrote:
> 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.
100% agreed.
> 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?
Please keep Jon and me in the loop, we added the dma_ops to the main
kernel for the Calgary IOMMU but haven't got around to porting the
various Xen dma ops to it.
Also, I believe Christian had some thoughts about the direction going
forward for the Xen specific dma ops?
Cheers,
Muli
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