Messages in this thread | | | Date | Fri, 27 Jun 2008 13:12:01 -0400 | From | Muli Ben-Yehuda <> | Subject | Re: [PATCH 01/34] AMD IOMMU: add Kconfig entry |
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On Fri, Jun 27, 2008 at 07:05:46PM +0200, Joerg Roedel wrote: > On Fri, Jun 27, 2008 at 12:59:47PM -0400, Muli Ben-Yehuda wrote: > > On Fri, Jun 27, 2008 at 06:54:30PM +0200, Joerg Roedel wrote: > > > > > True. At least for the case without device isolation I have some > > > optimizations in mind which will minimize the performance > > > tradeoff. I hope to have them ready for 2.6.28 :) > > > > Do you mean the case where you have a single I/O address space which > > is shared by all devices? > > Yes. I think this will be the case used most when IOMMU is used for > virtualization
Could you elaborate on what you mean here? I assume you're thinking one I/O address space for the host, and one I/O address space per guest with assigned devices?
> and to handle devices with limited DMA address ranges.
I'd be pretty surprised if you'll find such devices on machines which will have AMD's IOMMU...
> In this case there is a lot to optimize.
Looking forward to seeing what you have in mind :-)
Cheers, Muli
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