These patches are interduce the support for configure interrupt

These codes are all tested on x86_64 and aarch64 platform.
In the scenario with vp-vdpa/vdpa_sim /virtio net device, with
the irqfd and without irqfd

tested in virtio-pci bus and virtio-mmio bus

Change in v2:
Add support for virtio-mmio bus
active the notifier while the backend support configure interrupt
misc fixes from v1

Change in v3
fix the coding style problems

Change in v4
misc fixes from v3
merge the set_config_notifier to set_guest_notifier
when vdpa start, check the feature by VIRTIO_NET_F_STATUS

Change in v5
misc fixes from v4
split the code to introduce configure interrupt type and the callback function
will init the configure interrupt in all virtio-pci and virtio-mmio bus, but will
only active while using vhost-vdpa driver

Change in v6
misc fixes from v5
decouple vq from interrupt setting and misc process
fix the bug in virtio_net_handle_rx

Change in v7
misc fixes from v6
decouple vq from interrupt setting and misc process
decouple vq from vector use/release process
decouple vq from set notifier fd handler process
move config_notifier and masked_config_notifier to VirtIODevice
fix the bug in virtio_net_handle_rx, add more information
add VIRTIO_CONFIG_IRQ_IDX as the queue number for configure interrupt 

Change in v8
misc fixes from v7
decouple vq from interrupt setting and misc process
decouple vq from vector use/release process
decouple vq from set notifier fd handler process
move the vhost configure interrupt to vhost_net

Change in v9
misc fixes from v8
address the comments from v8

Change in v10
fix the hang issue in qtest
address the comments from v9

Change in v11
fix the crash in aarch64 plateform.
fix the crash upstream reported

Change in v12
fix the typo and the comments

changes in v13
re-send the patches by git-publish

Cindy Lu (10):
  virtio: introduce macro VIRTIO_CONFIG_IRQ_IDX
  virtio-pci: decouple notifier from interrupt process
  virtio-pci: decouple the single vector from the interrupt process
  vhost: introduce new VhostOps vhost_set_config_call
  vhost-vdpa: add support for config interrupt
  virtio: add support for configure interrupt
  vhost: add support for configure interrupt
  virtio-net: add support for configure interrupt
  virtio-mmio: add support for configure interrupt
  virtio-pci: add support for configure interrupt

 hw/display/vhost-user-gpu.c       |  13 ++
 hw/net/vhost_net.c                |   9 +
 hw/net/virtio-net.c               |  20 ++-
 hw/virtio/trace-events            |   1 +
 hw/virtio/vhost-user-fs.c         |  14 ++
 hw/virtio/vhost-vdpa.c            |   8 +
 hw/virtio/vhost-vsock-common.c    |  14 ++
 hw/virtio/vhost.c                 |  78 +++++++-
 hw/virtio/virtio-crypto.c         |  14 ++
 hw/virtio/virtio-mmio.c           |  27 +++
 hw/virtio/virtio-pci.c            | 283 +++++++++++++++++++++---------
 hw/virtio/virtio-pci.h            |   4 +-
 hw/virtio/virtio.c                |  29 +++
 include/hw/virtio/vhost-backend.h |   3 +
 include/hw/virtio/vhost.h         |   4 +
 include/hw/virtio/virtio.h        |   7 +
 include/net/vhost_net.h           |   2 +
 17 files changed, 443 insertions(+), 87 deletions(-)

-- 
2.34.3