vfio/ccw: handle a guest Format-1 IDAL

vfio/ccw: handle a guest Format-1 IDAL

There are two scenarios that need to be addressed here.

First, an ORB that does NOT have the Format-2 IDAL bit set could
have both a direct-addressed CCW and an indirect-data-address CCW
chained together. This means that the IDA CCW will contain a
Format-1 IDAL, and can be easily converted to a 2K Format-2 IDAL.
But it also means that the direct-addressed CCW needs to be
converted to the same 2K Format-2 IDAL for consistency with the
ORB settings.

Secondly, a Format-1 IDAL is comprised of 31-bit addresses.
Thus, we need to cast this IDAL to a pointer of ints while
populating the list of addresses that are sent to vfio.

Since the result of both of these is the use of the 2K IDAL
variants, and the output of vfio-ccw is always a Format-2 IDAL
(in order to use 64-bit addresses), make sure that the correct
control bit gets set in the ORB when these scenarios occur.

Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>