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

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Fri, Jan 10, 2014 at 12:16:22PM +0000, Andrew Cooper wrote:
> 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.
> 

Thanks for clarification. I will fix this comment.

Wei.

> ~Andrew

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