linux-kernel - Re: [PATCH v2 0/5] s390/vfio-ap: queue_configuration sysfs attribute for mdevctl automation

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Date: Wed, 6 Mar 2024 17:02:37 -0500
From: Matthew Rosato <mjrosato@...ux.ibm.com>
To: "Jason J. Herne" <jjherne@...ux.ibm.com>, linux-s390@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, pasic@...ux.ibm.com, akrowiak@...ux.ibm.com,
        borntraeger@...ibm.com, agordeev@...ux.ibm.com, gor@...ux.ibm.com
Subject: Re: [PATCH v2 0/5] s390/vfio-ap: queue_configuration sysfs attribute
 for mdevctl automation

On 3/6/24 9:08 AM, Jason J. Herne wrote:
> Mdevctl requires a way to atomically query and atomically update a vfio-ap
> mdev's current state. This patch set creates the queue_configuration sysfs
> attribute.  This new attribute allows reading and writing an mdev's entire
> state in one go. If a newly written state is invalid for any reason the entire
> state is rejected and the target mdev remains unchanged.
> 
> Changelog
> ==========
> v2
>   - Rebased patched on top of latest master
>   - Reworked code to fit changes introduced by f848cba767e59
>       s390/vfio-ap: reset queues filtered from the guest's AP config
>   - Moved docs changes to separate patch

Tested exploitation of the new sysfs interface using proposed s390-tools code + mdevctl.  Besides the other minor changes mentioned separately, feel free to include

Tested-by: Matthew Rosato <mjrosato@...ux.ibm.com>

for the code patches.