virtio-rng: hardware random number generator device

Hello,

Reviving this series last sent by Anthony to the list. The differences are minimal from the time Anthony sent, just rebasing to the current tree and fixing a couple of minor bugs.

I've not really looked in detail at the object patches -- mostly just concerned about the device itself.

Please review and apply if appropriate.

Changes from last submission:
- Fix a few typos/whitespaces in rng.h
- Switch to virtqueue_get_avail_bytes(): helps remove the savevm/loadvm complexities and provides a cleaner interface
- Remove the older qevent hunks that got left behind
- Rebase to master
- Bugfix: rng_backend_request_entropy() in chr_read() should pass len, not size
- Do not request for more entropy in chr_read() once the current request is served; there are other ways this notification will go out.

Amit Shah (1):
virtio-rng: hardware random number generator device

Anthony Liguori (7):
object: add object_property_add_bool (v2)
qdev: add realized property and make adding child bus implied by
realize
vl: add -object option to create QOM objects from the command line
vl: add -late-object to create QOM objects after machine init
rng: add RndBackend abstract object class
rng-urandom: add an RNG backend that uses /dev/urandom
rng-egd: introduce EGD compliant RNG backend

 Makefile.objs          |    2 +
 backends/Makefile.objs |    1 +
 backends/rng-egd.c     |  215 ++++++++++++++++++++++++++++++++++++++++++++++++
 backends/rng-urandom.c |  144 ++++++++++++++++++++++++++++++++
 backends/rng.c         |   93 +++++++++++++++++++++
 hw/Makefile.objs       |    1 +
 hw/pci.h               |    1 +
 hw/qdev.c              |   36 ++++++++-
 hw/s390-virtio-bus.c   |   37 ++++++++
 hw/s390-virtio-bus.h   |    2 +
 hw/virtio-pci.c        |   60 +++++++++++++
 hw/virtio-pci.h        |    2 +
 hw/virtio-rng.c        |  149 +++++++++++++++++++++++++++++++++
 hw/virtio-rng.h        |   24 ++++++
 hw/virtio.h            |    3 +
 include/qemu/object.h  |   16 ++++
 include/qemu/rng.h     |   93 +++++++++++++++++++++
 qemu-config.c          |   20 +++++
 qemu-options.hx        |   20 +++++
 qom/object.c           |   56 +++++++++++++
 vl.c                   |   62 ++++++++++++++
 21 files changed, 1036 insertions(+), 1 deletions(-)
 create mode 100644 backends/Makefile.objs
 create mode 100644 backends/rng-egd.c
 create mode 100644 backends/rng-urandom.c
 create mode 100644 backends/rng.c
 create mode 100644 hw/virtio-rng.c
 create mode 100644 hw/virtio-rng.h
 create mode 100644 include/qemu/rng.h

1.7.7.6