As an extra sanity check, make sure the region we're registering
can perform UFFDIO_COPY;  the COPY will fail later but this
gives a cleaner failure.
Signed-off-by: NDr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: NLaurent Vivier <lvivier@redhat.com>
Message-Id: <20170224182844.32452-17-dgilbert@redhat.com>
Signed-off-by: NDr. David Alan Gilbert <dgilbert@redhat.com>