[PATCH v3 0/4] virtio: Refactor vhost input stub

[Leo Yan]

This series is to refactor vhost stub vhost-user-input.

Since vhost input stub requires set_config() callback for communication
event configurations between the backend and the guest, patch 01 is a
preparison for support set_config() callback in vhost-user-base.

The patch 02 is to add documentation for vhost-user-input.

The patch 03 is to move virtio input stub from the input folder to the
virtio folder.

The patch 04 derives vhost-user-input from vhost-user-base.  We reuse
the common code from vhhost-user-base as possible and the input stub is
simplized significantly.

This patch set has been tested with the backend daemon:

  # ./build/contrib/vhost-user-input/vhost-user-input \
                     -p /dev/input/event20 -s /tmp/input.sock

The series is based on "[PATCH v8 0/7] virtio: cleanup
vhost-user-generic and reduce c&p" which introduces vhost-user-base.
Based-on: <20231107180752.3458672-1-alex.bennee@linaro.org>

Changes from v2:
- Created reference for shared memory object and updated
  vhost-user-input.rst respectively. (Marc-André)

Changes from v1:
- Fixed typo in vhost-user-input.rst.
- Updated MAINTAINERS for new added input document and
  changing folder for vhost-user-input.c. (Manos)


Leo Yan (4):
  hw/virtio: Support set_config() callback in vhost-user-base
  docs/system: Add vhost-user-input documentation
  hw/virtio: Move vhost-user-input into virtio folder
  hw/virtio: derive vhost-user-input from vhost-user-base

 MAINTAINERS                              |   3 +-
 docs/system/device-emulation.rst         |   1 +
 docs/system/devices/vhost-user-input.rst |  45 ++++++++
 docs/system/devices/vhost-user.rst       |   4 +-
 hw/input/meson.build                     |   1 -
 hw/input/vhost-user-input.c              | 136 -----------------------
 hw/virtio/meson.build                    |   4 +-
 hw/virtio/vhost-user-base.c              |  17 +++
 hw/virtio/vhost-user-input-pci.c         |   3 -
 hw/virtio/vhost-user-input.c             |  58 ++++++++++
 include/hw/virtio/virtio-input.h         |   6 +-
 11 files changed, 132 insertions(+), 146 deletions(-)
 create mode 100644 docs/system/devices/vhost-user-input.rst
 delete mode 100644 hw/input/vhost-user-input.c
 create mode 100644 hw/virtio/vhost-user-input.c

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2.39.2