Re: [Xen-devel] Re: PCI passthrough support via PV-PCI

[Samuel Thibault <samuel.thibault@xxxxxxxxxxxxx>]

Espen Skoglund, le Wed 02 Jul 2008 15:18:16 +0100, a écrit :
> [Samuel Thibault]
> > Keir Fraser, le Wed 02 Jul 2008 13:59:42 +0100, a écrit :
> >> Shouldn't they happen from xend or pciback?
> 
> > For PV guests it looks like something is done indeed, because else
> > it wouldn't work.  It is probably a matter of having domctl permit
> > the stub domain to transfer these rights to the HVM guest.
> 
> When I added VT-d support for PV guests I made xend do the device
> assignment iff the destination was a PV domain.  Is there any reason
> why device assignment can not be performed by xend for HVM guests as
> well?
> 
> Other resource assignment (IOMEM and IRQs) still seems to happen in
> xend for HVM guests as well as for PV guest.  What other domctls does
> ioemu need to perform?

ioemu needs to update the mappings, see the pt_iomem_map() function.

Samuel

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