[XenPPC] RFC: PowerPC and VIO

[Jimi Xenidis <jimix@xxxxxxxxxxxxxx>]

Well, we've had some success good success with VIO on PowerPC.  We  
have had to reintroduce some "P2V-like" stuff to get it going,  
because the PowerPC is a very different beast WRT grant tables.  Now  
that I understand it a little better I think we can re-work to remove  
some of the hacks we put in.
Immediate questions do come to mind:
  Why do we return the MFN on a GNTTABOP_map_grant_ref?
  Shouldn't that all be hidden?
  I use it now, but can I depend on it in the future?

I'll have more to discuss soon as I have more code.

-JX


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