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

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Date:   Fri, 20 Jan 2023 11:25:59 +0100
From:   Christian Borntraeger <borntraeger@...ibm.com>
To:     Tony Krowiak <akrowiak@...ux.ibm.com>, linux-s390@...r.kernel.org,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     jjherne@...ux.ibm.com, freude@...ux.ibm.com, pasic@...ux.ibm.com,
        Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>
Subject: Re: [PATCH v2 0/6] improve AP queue reset processing

Am 18.01.23 um 21:31 schrieb Tony Krowiak:
> 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(-)
> 

Thanks applied and queued for CI and regression runs. Will likely go via s390 tree.