Xen stuff

[Doug Rabson]

I will be working on improving Xen support in FreeBSD for the new few  
months. My main goal is to add support for native Xen drivers to an  
amd64 kernel which is running in Xen's HVM mode. These drivers will  
take over from the slow emulated devices and provide most of the  
performance benefits of a paravirtualised kernel. I'm initially going  
to be supporting FreeBSD 6.x but I will port it all forward to head  
and 7.x when it works properly.

If anyone is interested in following this work, please feel free to  
contact me by email or just check out my working tree at http://svn.freebsd.org/user/dfr/xenhvm/6 
.