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Date: Thu, 11 Aug 2022 16:09:15 +0200
From: Halil Pasic <pasic@linux.ibm.com>
Subject: Re: [virtio-dev] Re: [PATCH 1/4] content: Introduce driver/device
 auxiliary notifications
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To: Cornelia Huck <cohuck@redhat.com>
Cc: David Hildenbrand <david@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>, Usama Arif <usama.arif@bytedance.com>, virtio-dev@lists.oasis-open.org, stefanha@redhat.com, ndragazis@arrikto.com, fam.zheng@bytedance.com, liangma@liangbit.com, Halil Pasic <pasic@linux.ibm.com>
List-ID: <virtio-dev.lists.oasis-open.org>

On Thu, 11 Aug 2022 10:53:35 +0200
Cornelia Huck <cohuck@redhat.com> wrote:

> On Wed, Aug 10 2022, Halil Pasic <pasic@linux.ibm.com> wrote:
> 
> > On Wed, 10 Aug 2022 11:54:35 +0200
> > Cornelia Huck <cohuck@redhat.com> wrote:
> >  
> >> >> These device-specific notifications are needed later when adding support
> >> >> for virtio-vhost-user device.
> >> >> 
> >> >> Signed-off-by: Usama Arif <usama.arif@bytedance.com>
> >> >> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> >> >> Signed-off-by: Nikos Dragazis <ndragazis@arrikto.com>    
> >> >
> >> > I see ccw is missing. Cornelia, any suggestions?    
> >> 
> >> Hmm... I seem to be really behind on ccw things :(
> >> 
> >> We can probably use the following:
> >> 
> >> - for device->driver notification, use the next bit in the secondary
> >>   indicators (bit 0 is used for config change notification)
> >> - for driver->device notification, maybe use a new subcode for diagnose
> >>   0x500 (4 is probably the next free one?)
> >>   
> >
> > Sounds reasonable! I will have to double check the DIAG stuff though. I'm
> > not sure where what needs to be reserved and documented.   
> 
> There's
> https://gitlab.com/davidhildenbrand/s390x-os-virt-spec/-/merge_requests/1,
> but nothing much has happened there recently. David?

Hm, that seems to be private. I land on a sign-in page.

Regards,
Halil