[Fedora-xen] No pcifront in F10?

[Jim Lutz]

I have a virtual machine landscape consisting of a CentOS 5.3 Dom0 with 
Xen 3.1.2, some PV CentOS DomU's with PCI passthrough (same versions), 
and I'm trying to implement a F10 DomU with PCI passthrough. I set 
everything up for the passthrough, and the F10 guest can't see any of 
the devices with lspci. If I boot a CentOS PV machine with the same PCI 
passthrough configuration, the devices show up with lspci. I've seen 
some posts in various places about this issue, but no solutions. How do 
I implement this?