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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