HVM debug console ring for PV (Windows) drivers
Creates a shared memory ring buffer and event channel in HVM
domains
for passing debug messages from PV drivers on HVM guests
For use with the Windows PV drivers (xevtchn, xenutil, ...)
Uses standard console (libxl_device_console_add) creation
functions
 
Signed-off-by: Owen Smith <owen.smith@xxxxxxxxxx>