This patch set has a dual purpose: introduce proper migration for the
channel subsystem (css) and convert the migration of ccw devices to
vmstate. The state of the css was only partially migrated by the
virtio-ccw devices (was the only device type until recent), which was
good enough for a while.

Since the new vmstate infrastructure is used also for handling the
migration stream for legacy machines some bits are a bit convoluted:
that is, if you see something convoluted there is a good chance the
reason why is compatibility.

Halil Pasic (10):
  s390x: add helper get_machine_class
  s390x: add css_migration_enabled to machine class
  s390x/css: add vmstate entities for css
  s390x/css: add vmstate macro for CcwDevice
  virtio-ccw: add vmstate entities for VirtioCcwDevice
  virtio-ccw: use vmstate way for config migration
  s390x/css: remove unused subch_dev_(load|save)
  s390x/css: add ORB to SubchDev
  s390x/css: turn on channel subsystem migration
  s390x/css: use SubchDev.orb

 hw/intc/s390_flic.c                |  48 ++++
 hw/s390x/ccw-device.c              |  11 +
 hw/s390x/ccw-device.h              |   4 +
 hw/s390x/css.c                     | 478 +++++++++++++++++++++++++------------
 hw/s390x/s390-virtio-ccw.c         |  58 +++--
 hw/s390x/virtio-ccw.c              | 164 +++++++------
 include/hw/s390x/css.h             |  17 +-
 include/hw/s390x/s390-virtio-ccw.h |   7 +
 include/hw/s390x/s390_flic.h       |   5 +
 9 files changed, 543 insertions(+), 249 deletions(-)

-- 
2.10.2