linux-kernel - Re: [Qemu-devel] [RFC PATCH 0/3] vfio: ccw: basic channel path event handling

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Message-Id: <f9224bba-08fb-589e-ed6e-d8e967a8fe67@linux.vnet.ibm.com>
Date:   Fri, 12 Jan 2018 19:10:20 +0100
From:   Halil Pasic <pasic@...ux.vnet.ibm.com>
To:     Dong Jia Shi <bjsdjshi@...ux.vnet.ibm.com>,
        linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org,
        kvm@...r.kernel.org, qemu-devel@...gnu.org, qemu-s390x@...gnu.org
Cc:     cohuck@...hat.com, borntraeger@...ibm.com,
        pmorel@...ux.vnet.ibm.com
Subject: Re: [Qemu-devel] [RFC PATCH 0/3] vfio: ccw: basic channel path event
 handling

On 01/11/2018 04:04 AM, Dong Jia Shi wrote:
> What are still missing, thus need to be offered in the next version are:
> - I/O termination and FSM state handling if currently we have I/O on the status
>   switched path.
> - Vary on/off event is not sensible to a guest.

I don't see a doc update. We do have documentation (in
Documentation/s390/vfio-ccw.txt) in which the uapi interface with the
regions and their purpose/usage  is at least kind of explained. You are
changing this interface without updating the doc.

I would like to see documentation on this because I'm under the
impression either the design is pretty convoluted or I did not
get it at all.

Regards,
Halil