Re: [Qemu-devel] [PATCH v4 0/6] virtio: add input device

[Michael S. Tsirkin]

On Thu, May 28, 2015 at 11:46:32AM +0200, Gerd Hoffmann wrote:
>   Hi,
> 
> This patch series adds virtio input devices.  It's basically sending
> linux evdev events over virtio.  There is support for emulated hid
> devices (i.e. send usual input to virtio device instead of usb or ps2
> device).
> 
> For v4 I've splitted the patches, so virtio-*-device and virtio-*-pci
> are added by separate patches.  I've also left out pass-through for now.
> 
> So, patches 1-3 implement the actual devices, and they should be ready
> to merge.  They apply cleanly to master and build just fine with a minor
> fixup (s/64/32/ for virtio_input_get_features).  I plan to send out a
> pull request for them soon.
> 
> Patches 4-6 carry the virtio-pci support code.  They have a dependency
> on the virtio-1 branch (from mst or cordula), because I want them be
> non-transitional devices.  The device has been designed with virtio-1
> in mind, where virtio-pci config space moves from io to mmio, so having
> a bit larger config space isn't a big issue.
> 
> Not sure how to proceed best with patches 4-6.  I don't feel like making
> them transitional devices, but missing qemu 2.4 because virtio-pci isn't
> ready for virtio 1.0 doesn't look nice either :(

Help us complete virtio 1 support in 2.4?

> Guest driver:  Present in linux kernel 4.1-rc1 & newer.
> 
> Specification (slightly outdated, latest changes from kernel driver
> review not added yet):
>   https://www.kraxel.org/cgit/virtio-spec/log/?h=virtio-input
>   
> https://www.kraxel.org/virtio/virtio-v1.0-csprd03-virtio-input.html#x1-2640007
> 
> Gerd Hoffmann (6):
>   virtio-input: add linux/input.h
>   virtio-input: core code & base class [device]
>   virtio-input: emulated devices [device]
>   pci: add  PCI_CLASS_INPUT_*
>   virtio-input: core code & base class [pci]
>   virtio-input: emulated devices [pci]
> 
>  hw/input/Makefile.objs                 |    5 +
>  hw/input/virtio-input-hid.c            |  502 +++++++++++++
>  hw/input/virtio-input.c                |  282 ++++++++
>  hw/virtio/virtio-pci.c                 |  120 ++++
>  hw/virtio/virtio-pci.h                 |   27 +
>  include/hw/pci/pci_ids.h               |    7 +
>  include/hw/virtio/virtio-input.h       |  105 +++
>  include/hw/virtio/virtio.h             |    1 +
>  include/standard-headers/linux/input.h | 1198 
> ++++++++++++++++++++++++++++++++
>  scripts/update-linux-headers.sh        |    4 +-
>  10 files changed, 2250 insertions(+), 1 deletion(-)
>  create mode 100644 hw/input/virtio-input-hid.c
>  create mode 100644 hw/input/virtio-input.c
>  create mode 100644 include/hw/virtio/virtio-input.h
>  create mode 100644 include/standard-headers/linux/input.h
> 
> -- 
> 1.8.3.1