systemtap probe points for Xen hypervisor

[Peter Teoh]

How do we probe the Xen hypervisor, while running as the dom0 (which
is the GUI frontend for us, and  running as guest)?   Since the entry
to hypervisor is controlled, I supposed it will need a patch before
systemtap can be used to probe the Xen hypervisor, right?   Or is it
not a logical thing  to do?

My target of interest will be to trace/analyze  the behavior of the
Xen hypervisor, and the domX guest as well.

Thank you for your answer.

-- 
Regards,
Peter Teoh