vfio-ccw: add some logging

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Usually, the common I/O layer logs various things into the s390
cio debug feature, which has been very helpful in the past when
looking at crash dumps. As vfio-ccw devices unbind from the
standard I/O subchannel driver, we lose some information there.

Let's introduce some vfio-ccw debug features and log some things
there. (Unfortunately we cannot reuse the cio debug feature from
a module.)

Message-Id: <20190816151505.9853-2-cohuck@redhat.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>

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This commit is contained in:

Cornelia Huck 2019-08-15 13:53:41 +02:00

parent 416f79c23d

commit 60e05d1cf0

4 changed files with 124 additions and 4 deletions

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50

drivers/s390/cio/vfio_ccw_drv.c

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51

drivers/s390/cio/vfio_ccw_fsm.c

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10

drivers/s390/cio/vfio_ccw_ops.c

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17

drivers/s390/cio/vfio_ccw_private.h

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