vfio-ccw: protect the I/O region

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Introduce a mutex to disallow concurrent reads or writes to the
I/O region. This makes sure that the data the kernel or user
space see is always consistent.

The same mutex will be used to protect the async region as well.

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 2019-01-08 15:53:03 +01:00

parent 690f6a1581

commit 4f76617378

3 changed files with 24 additions and 9 deletions

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3

drivers/s390/cio/vfio_ccw_drv.c

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32

drivers/s390/cio/vfio_ccw_ops.c

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2

drivers/s390/cio/vfio_ccw_private.h

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