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

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Message-ID: <your-ad-here.call-01739357719-ext-1861@work.hours>
Date: Wed, 12 Feb 2025 11:55:19 +0100
From: Vasily Gorbik <gor@...ux.ibm.com>
To: Anthony Krowiak <akrowiak@...ux.ibm.com>
Cc: Rorie Reyes <rreyes@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        Heiko Carstens <hca@...ux.ibm.com>, 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 Tue, Feb 11, 2025 at 03:24:05PM -0500, Anthony Krowiak wrote:
> 
> 
> 
> On 2/11/25 10:02 AM, Rorie Reyes wrote:
> > 
> > On 2/11/25 2:58 AM, Alexander Gordeev wrote:
> > > On Thu, Feb 06, 2025 at 09:12:27AM -0500, Rorie Reyes wrote:
> > > 
> > > Hi Rorie,
> > > 
> > > > 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
> > > ...
> > > > > > 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?
> > > The original question still stays - is it safe to pull this patch now,
> > > before the corresponding QEMU change is integrated?
> 
> This patch has to be pulled before the QEMU patches are integrated. The
> change to the
> include/uapi/linux/vfio.h file needs to be merged before the QEMU version of
> that file
> can be generated for a QEMU build. I have given my r-b for this patch, so I
> think it is
> safe to pull it now.

Ok, applied, thank you!