linux-kernel - [PATCH v2 0/6] improve AP queue reset processing

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Message-Id: <20230118203111.529766-1-akrowiak@linux.ibm.com>
Date:   Wed, 18 Jan 2023 15:31:05 -0500
From:   Tony Krowiak <akrowiak@...ux.ibm.com>
To:     linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Cc:     jjherne@...ux.ibm.com, freude@...ux.ibm.com,
        borntraeger@...ibm.com, pasic@...ux.ibm.com
Subject: [PATCH v2 0/6] improve AP queue reset processing

This series introduces several improvements to the function that performs
AP queue resets:

* Breaks up reset processing into multiple smaller, more concise functions.

* Use TAPQ to verify completion of a reset in progress rather than mulitple
  invocations of ZAPQ.

* Check TAPQ response codes when verifying successful completion of ZAPQ.

* Fix erroneous handling of some error response codes.

* Increase the maximum amount of time to wait for successful completion of
  ZAPQ.
 
Change log v1 => v2:
-------------------
Remove patch 7/7 to restore original behavior since we don't know whether
interrupts are disabled when an unexpected response code is returned from 
ZAPQ. (Halil)

Tony Krowiak (6):
  s390/vfio-ap: verify reset complete in separate function
  s390/vfio_ap: check TAPQ response code when waiting for queue reset
  s390/vfio_ap: use TAPQ to verify reset in progress completes
  s390/vfio_ap: verify ZAPQ completion after return of response code
    zero
  s390/vfio_ap: fix handling of error response codes
  s390/vfio_ap: increase max wait time for reset verification

 drivers/s390/crypto/vfio_ap_ops.c | 104 +++++++++++++++++++++---------
 1 file changed, 72 insertions(+), 32 deletions(-)

-- 
2.31.1