Missing drivers: xen-vbd.ko and xen-vnif.ko

During install, OpenSUSE loads xen-vbd.ko and xen-vnif.ko, but after install these drivers are not present.

I can’t find them in /lib/modules nor I can find a package on the installation DVD containing this Xen Virtualized Hardware drivers to use Disk and Network on a HVM DomU.

Can anybody give me a hint?

System: OpenSUSE 11.1 x86_64, running in a Xen HVM DomU (on OpenSolaris).
At the moment, it uses rtl8139 and ata emulation which is slow, sure.

I am new to this forum so I don’t know whether this belongs to the “Installation” forum or to the Drivers/Hardware forum. These two files are drivers for virtualized hardware but it’s also an installation issue (because during install these drivers are present).
Sorry for crossposting if this was a mistake.