linux-kernel - Re: [PATCH v1] s390/vfio-ap: Signal eventfd when guest AP configuration is changed

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Message-ID: <f69bba4b-a97e-4166-9ce1-c8a2ad634696@linux.ibm.com>
Date: Wed, 5 Feb 2025 12:33:05 -0500
From: Rorie Reyes <rreyes@...ux.ibm.com>
To: Alexander Gordeev <agordeev@...ux.ibm.com>,
        Anthony Krowiak <akrowiak@...ux.ibm.com>
Cc: linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, hca@...ux.ibm.com, borntraeger@...ibm.com,
        gor@...ux.ibm.com, pasic@...ux.ibm.com, jjherne@...ux.ibm.com,
        alex.williamson@...hat.com
Subject: Re: [PATCH v1] s390/vfio-ap: Signal eventfd when guest AP
 configuration is changed


On 1/13/25 11:08 AM, Alexander Gordeev wrote:
> On Tue, Jan 07, 2025 at 01:36:45PM -0500, Rorie Reyes wrote:
>
> Hi Rorie, Antony,
>
>> Note that there are corresponding QEMU patches that will be shipped along
>> with this patch (see vfio-ap: Report vfio-ap configuration changes) that
>> will pick up the eventfd signal.
> How this patch is synchronized with the mentioned QEMU series?
> What is the series status, especially with the comment from Cédric Le Goater [1]?
>
> 1. https://lore.kernel.org/all/20250107184354.91079-1-rreyes@linux.ibm.com/T/#mb0d37909c5f69bdff96289094ac0bad0922a7cce
>
> Thanks!

Hey Alex, sorry for the long delay. This patch is synchronized with the 
QEMU series by registering an event notifier handler to process AP 
configuration

change events. This is done by queuing the event and generating a CRW. 
The series status is currently going through a v2 RFC after implementing 
changes

requested by Cedric and Tony.

Let me know if there's anything else you're concerned with

Thanks!