s390/vfio-ap: allow assignment of unavailable AP queues to mdev device

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The current implementation does not allow assignment of an AP adapter or
domain to an mdev device if each APQN resulting from the assignment
does not reference an AP queue device that is bound to the vfio_ap device
driver. This patch allows assignment of AP resources to the matrix mdev as
long as the APQNs resulting from the assignment:
   1. Are not reserved by the AP BUS for use by the zcrypt device drivers.
   2. Are not assigned to another matrix mdev.

The rationale behind this is that the AP architecture does not preclude
assignment of APQNs to an AP configuration profile that are not available
to the system.

Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>

...

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Tony Krowiak 2020-12-14 21:14:54 -05:00 • committed by Alexander Gordeev

parent 48cae940c3

commit e2126a7374

1 changed files with 53 additions and 171 deletions

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drivers/s390/crypto/vfio_ap_ops.c

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