xen Use CFLAGS from /etc/make.conf rather than the default Xen CFLAGS (not supported) Enable support for hardware based virtualization (VT-x, AMD-v Install the pygrub boot loader Enable support for running domain U console in an app-misc/screen session Enable the ACM/sHype XSM module from IBM Enable the Flask XSM module from NSA Build the C libxenapi bindings Enable ioemu support for HVM guests