Re: [Xen-devel] [PATCH] libxl: disallow PCI device assignment for HVM guest when PoD is enabled

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 10/01/2014 11:46, Wei Liu wrote:
> On Fri, Jan 10, 2014 at 11:39:51AM +0000, Jan Beulich wrote:
>>>>> On 10.01.14 at 12:27, Wei Liu <wei.liu2@xxxxxxxxxx> wrote:
>>> +    /* We cannot have PoD and PCI device assignment at the same time
>>> +     * for HVM guest. It was reported that VT-d engine cannot
>> There's still a "VT-d" left in here...
>>
> I mentioned AMD as well. Was trying to clarify things a bit more...
>
> Wei.

Use "IOMMU"/"PCI Passthrough"/etc as appropriate, which are vendor neutral.

There is no way for for PoD (or Paging for that matter) to work in
combination with PCIPassthrough, as you need all the backing RAM for all
gfns to exist to receive DMA.

~Andrew

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