s390/vfio-ap: reset queues associated with adapter for queue unbound from driver

Browse source

commit f009cfa466 upstream.

When a queue is unbound from the vfio_ap device driver, if that queue is
assigned to a guest's AP configuration, its associated adapter is removed
because queues are defined to a guest via a matrix of adapters and
domains; so, it is not possible to remove a single queue.

If an adapter is removed from the guest's AP configuration, all associated
queues must be reset to prevent leaking crypto data should any of them be
assigned to a different guest or device driver. The one caveat is that if
the queue is being removed because the adapter or domain has been removed
from the host's AP configuration, then an attempt to reset the queue will
fail with response code 01, AP-queue number not valid; so resetting these
queues should be skipped.

Acked-by: Halil Pasic <pasic@linux.ibm.com>
Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
Fixes: 09d31ff787 ("s390/vfio-ap: hot plug/unplug of AP devices when probed/removed")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20240115185441.31526-6-akrowiak@linux.ibm.com
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Tony Krowiak 2024-01-15 13:54:35 -05:00 • committed by Greg Kroah-Hartman

parent 44992a7656

commit 2c9bb887dc

1 changed files with 41 additions and 35 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

76

drivers/s390/crypto/vfio_ap_ops.c

View file