Re: GPU Passthrough without VT-d

[Kai Huang <kai.k.huang@linux.intel.com>]

In general you cannot do pci passthrough for HVM without IOMMU (vt-d) 
support, as we need VT-d to support guest physical address to machine 
address translation for DMA.

However, theoretically, you can do it by hacking Xen to setup identical 
(1:1) mappings for guest's memory, but it's not a pretty way and you 
should expect to suffer lots of tricky corner case bugs.

Thanks,
-Kai

On 03/07/2014 11:03 AM, Dushyant Behl wrote:
> Hi all,
>
> I am new to the xen community and I wanted to work on the project
> "Allowing guests to boot with a passed-through GPU as the primary
> display" but the processor in my system does not supports IO MMU
> Virtualization (Intel VT-d), it only supports the Intel Virtualization
> (Intel VT-x). Would it be possible for me to work on the project in anyway?
>
> Thanks,
> Dushyant
>
>
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