linux-kernel - [PATCH V3 0/3] gpio: Add virtio based driver

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Message-Id: <cover.1623326176.git.viresh.kumar@linaro.org>
Date:   Thu, 10 Jun 2021 17:39:05 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        "Enrico Weigelt, metux IT consult" <info@...ux.net>,
        Jason Wang <jasowang@...hat.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Viresh Kumar <vireshk@...nel.org>
Cc:     Viresh Kumar <viresh.kumar@...aro.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Bill Mills <bill.mills@...aro.org>,
        Alex Bennée <alex.bennee@...aro.org>,
        stratos-dev@...lists.linaro.org, linux-gpio@...r.kernel.org,
        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
Subject: [PATCH V3 0/3] gpio: Add virtio based driver

Hello,

This adds a virtio based GPIO driver based on the proposed specification [1].

The first two versions [2] were sent by Enrico earlier and here is a newer version.
I have retained the authorship of the work done by Enrico (1st patch) to make
sure we don't loose his credits.

I have tested all basic operations of the patchset (with Qemu guest) with the
libgpiod utility. I have also tested the handling of interrupts on the guest
side. All works as expected.

I will now be working towards a Rust based hypervisor agnostic backend to
provide a generic solution for that.

This should be merged only after the specifications are merged, I will keep
everyone posted for the same.

I am not adding a version history here as a lot of changes have been made, from
protocol to code and this really needs a full review from scratch.

--
Viresh

[1] https://lists.oasis-open.org/archives/virtio-comment/202106/msg00022.html
[2] https://lore.kernel.org/linux-gpio/20201203191135.21576-2-info@metux.net/

Enrico Weigelt, metux IT consult (1):
  gpio: Add virtio-gpio driver

Viresh Kumar (2):
  gpio: virtio: Add IRQ support
  MAINTAINERS: Add entry for Virtio-gpio

 MAINTAINERS                      |   7 +
 drivers/gpio/Kconfig             |   9 +
 drivers/gpio/Makefile            |   1 +
 drivers/gpio/gpio-virtio.c       | 566 +++++++++++++++++++++++++++++++
 include/uapi/linux/virtio_gpio.h |  56 +++
 include/uapi/linux/virtio_ids.h  |   1 +
 6 files changed, 640 insertions(+)
 create mode 100644 drivers/gpio/gpio-virtio.c
 create mode 100644 include/uapi/linux/virtio_gpio.h

-- 
2.31.1.272.g89b43f80a514