Add pvp mode.
Add pvp mode.

The PVP mode simulates the Physical-to-Virtual-to-Physical
setup with copies between phy-to-virt and vice-versa.

Signed-off-by: Flavio Leitner <aad92d04492d3e9d68113c6843d4514145c8ed06@sysclose.org>

fleitner/cmt