[Qemu-devel] [RFC PATCH v3 0/2] Introduce virtio-bus.

[fred . konrad]

From: KONRAD Frederic <address@hidden>

As said on IRC, I send only VirtioBus as old implementation of VirtioPCI is not 
longer making sense after the changes on VirtioBus.

As anthony said, the better way to do this refactoring is :

    * Introducing a virtio-bus which extends bus-state.
    * Implementing a virtio-pci-bus which extends virtio-bus.
    * Implementing virtio-device which extends device-states.

This patch introduce virtio-bus, which is abstract and extends bus-state.

The VirtioBusClass still has init and exit methods, which must be called by the
VirtIODevice, and have all the VirtioBindings methods. The futur virtio-x-bus,
will have to implement this methods to be a virtio-bus.

The second patch is a modification of qdev-monitor.c, it forces the function
qbus_find_recursive(..) to return a non full bus, and return an error if the
desired bus ( with "bus=" option ) is full. It add a max_dev field to the
bus_state structure. If max_dev=0 it has no limitation, if not the maximum
amount of device connected to the bus is max_dev.

Changes v2 -> v3:
    * Added VirtioBusClass.
    * Renamed VirtioBus -> VirtioBusState.
    * Renamed qbus -> parent_obj.
    * Plug the device only in a non-full bus.

Changes v1 -> v2:

    * All the little fix you suggest ( License, Debug printf, naming convention,
      ...)
    * Added get_virtio_device_id(), and remove the pci_id* from the VirtioBus
      structure.
    * Added virtio_bus_reset().
    * Added cast macros VIRTIO_BUS.
    * Added virtio_bus_plug_device.
    * Replaced the old-style "bus->qbus" by BUS() macro.

Fred

KONRAD Frederic (2):
  virtio-bus : Introduce virtio-bus
  qbus : add a maximum device.

 hw/qdev-core.h    |    1 +
 hw/qdev-monitor.c |   12 +++++
 hw/virtio-bus.c   |  118 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 hw/virtio-bus.h   |   74 +++++++++++++++++++++++++++++++++
 4 files changed, 205 insertions(+), 0 deletions(-)
 create mode 100644 hw/virtio-bus.c
 create mode 100644 hw/virtio-bus.h