pmf(9) and Xen domU suspending?

[Jean-Yves Migeon <jean-yves.migeon%espci.fr@localhost>]

Hi list,

I am working on suspend/resume functionality for port-xen under the 
supervision of Manuel Bouyer (bouyer@) and Stoned Elipot (seb@). 
Currently, I am mostly trying to get familiar with NetBSD internals, and 
Xen.

While studying the code regarding devices relating to port-xen (xenbus, 
xennet, hypervisor...), I was thinking at how I should implement the 
suspend/resume mechanisms for theses devices and buses (inspired by ACPI 
states). Manuel suggested me to have a look at pmf(9), but the 
documentation tends to be scarce (compared to autoconf machinery on 
"NetBSD internals"). And since pmf(9) is still a WIP, I am a bit lost 
with it.

The man page points me to the MI implementation of it in the kernel. 
However, I would like to know if there lies somewhere some "canonical" 
example (or how-to) I could read just to get a better understanding of it.

Thanking you in advance for your time and patience,

--
Jean-Yves Migeon
ESPCI engineering student - www.espci.fr
jean-yves.migeon%espci.fr@localhost