linux-kernel - Re: [PATCH V3 1/3] gpio: Add virtio-gpio driver

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Message-ID: <0478822f-9d10-deb8-86ae-3b4ac3bb0c6c@metux.net>
Date:   Mon, 14 Jun 2021 10:07:28 +0200
From:   "Enrico Weigelt, metux IT consult" <lkml@...ux.net>
To:     Viresh Kumar <viresh.kumar@...aro.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        "Enrico Weigelt, metux IT consult" <info@...ux.net>,
        Viresh Kumar <vireshk@...nel.org>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Bill Mills <bill.mills@...aro.org>,
        Alex Bennée <alex.bennee@...aro.org>,
        stratos-dev@...lists.linaro.org,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        "Stefano Garzarella --cc virtualization @ lists . linux-foundation . org" 
        <sgarzare@...hat.com>, virtualization@...ts.linux-foundation.org,
        Alistair Strachan <astrachan@...gle.com>
Subject: Re: [PATCH V3 1/3] gpio: Add virtio-gpio driver

On 11.06.21 10:01, Viresh Kumar wrote:

> No, QEMU passes the raw messages to the backend daemon running in host
> userspace (which shares a socket with qemu). The backend understands
> the virtio/vhost protocols and so won't be required to change at all
> if we move from Qemu to something else. And that's what we (Linaro)
> are looking to do here with Project Stratos.

Note that this is completely different from my approach that I've posted
in autumn last year. Viresh's protocol hasn't much in common with mine.


--mtx

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Enrico Weigelt, metux IT consult
Free software and Linux embedded engineering
info@...ux.net -- +49-151-27565287