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 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.

> Jan
> 
> > +     * work with PoD enabled because it needs to populated entire page
> > +     * table for guest. Also a quick grep through AMD IOMMU related
> > +     * code suggests it has not coped with PoD as well. Just to stay
> > +     * on the safe side, we disable PCI device assignment with PoD all
> > +     * together, regardless of the underlying IOMMU in use.
> > +     */
> 
> 

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