I have been tracking the 1.3 I/O update quite closely, and have a
reasonable idea of how the low level mechanisms work.
Is there a roadmap document that describes where Xen I/O is going at a
IE - Will the Hardware I/O drivers be removed from Xen, and moved into a
special I/O manager domain (or Domain 0)
Will there be a stub (just drivers, and not much else) linux
kernel running in a privileged domain just for servicing hardware to
other domains that don't map the hardware?
Will Domain 0 continue to do its own hardware I/O?
Will it be possible to have complicated mappings of privileged
domains that each control different bits of hardware, and have them
service I/O to arbitrary sets of non-privileged domains?