Hi Connie, and all,
I come back on the consolidation of the VFIO CCW driver,
this time by making smaller steps.
Here a first proposal, as RFC, therefore I only CC to
the linux-s390 list.
The first patch of this serie is essentially cosmetic
to clarify the code.
The second patch is a bug correction.
The last three patches clarify the linux device state changes.
Currently the VFIO CCW driver may be used while it is
not completely initialized or not dedicated to a guest.
- Let's consolidate this by moving state change and initialization
inside the mediated device open callback.
- quiesce the device when the mediated device is released.
- refuse to remove a mediated device when it is in use.
- do not change the linux state on subchannel events.
Regards,
Pierre
Pierre Morel (5):
vfio: ccw: Merge BUSY and BOXED states
vfio: ccw: Register mediated device once all structures are
initialized
vfio: ccw: Set subchannel state STANDBY on open
vfio: ccw: Refactoring state changes
vfio: ccw: Do not change the mediated device state on sch events
drivers/s390/cio/vfio_ccw_drv.c | 38 ++++++++++++++++-------------------
drivers/s390/cio/vfio_ccw_fsm.c | 7 +------
drivers/s390/cio/vfio_ccw_ops.c | 40 +++++++++++++++++++++++++++----------
drivers/s390/cio/vfio_ccw_private.h | 1 -
4 files changed, 47 insertions(+), 39 deletions(-)
--
2.7.4
