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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <02675184-0ce5-4f08-9d5d-f42987b77b5b@linux.ibm.com>
Date: Thu, 6 Feb 2025 09:12:27 -0500
From: Rorie Reyes <rreyes@...ux.ibm.com>
To: Alexander Gordeev <agordeev@...ux.ibm.com>,
        Anthony Krowiak <akrowiak@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>, Heiko Carstens <hca@...ux.ibm.com>
Cc: linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, borntraeger@...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 2/6/25 2:40 AM, Alexander Gordeev wrote:
> On Wed, Feb 05, 2025 at 12:47:55PM -0500, Anthony Krowiak wrote:
>>>> 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
> ...
>>> 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!
>> I don't think that is what Alex was asking. I believe he is asking how the
>> QEMU and kernel patch series are going to be synchronized.
>> Given the kernel series changes a value in vfio.h which is used by QEMU, the
>> two series need to be coordinated since the vfio.h file
>> used by QEMU can not be updated until the kernel code is available. So these
>> two sets of code have
>> to be merged upstream during a merge window. which is different for the
>> kernel and QEMU. At least I think that is what Alex is asking.
> Correct.
> Thanks for the clarification, Anthony!

Tony, thank you for the back up!

Alexander, is there anything else you need from my end for clarification?