xen: Add privcmd device driver

Access to arbitrary hypercalls is currently provided via xenfs. This
adds a standard character device to handle this. The support in xenfs
remains for backward compatibility and uses the device driver code.

Signed-off-by: Bastian Blank <[email protected]>
Acked-by: Ian Campbell <[email protected]>
Signed-off-by: Konrad Rzeszutek Wilk <[email protected]>
7 files changed