Re: [Xen-users] pci passthrough and svm

["Todd Deshane" <deshantm@xxxxxxxxx>]

On Sat, Sep 13, 2008 at 11:24 AM, Javier Guerra Giraldez
<javier@xxxxxxxxxxx> wrote:
> On Friday 12 September 2008, Mike Power wrote:
>> I can not pass through PCI with out VT-d or equivalent
>> AMD doesn't have a VT-d equivalent out yet
>
> i thought AMD's IOMMU predated Intel's VT-d.  am i missing something?
>

The IOMMU support that AMD has in first generataion AMD-V is not the full
IOMMU support needed for secure passthrough. Intel VT-d is the only choice
at this point, but AMD support is coming soon.

here is a link that will help add to the confusion.
http://en.wikipedia.org/wiki/IOMMU

They don't seem to mention (at a quick glance) that the AMD IOMMU support
in the older AMD stuff is not the full functionality required for
virtualization DMA
protection support.

Muli is the expert on this sort of thing, browse these threads and see
that there
is a IOMMU GART and IOMMU that supports DMA re-mapping etc.

http://xen.markmail.org/search/?q=IOMMU#query:IOMMU%20from%3A%22Muli%20Ben-Yehuda%22+page:1+mid:t2iir5dcee7rfpe6+state:results

Cheers,
Todd


-- 
Todd Deshane
http://todddeshane.net
check out our book: http://runningxen.com

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