virtio, vhost fixes

The following patches fix qemu-kvm specific crashes with vhost-net. They need to be applied before qemu.git including analogous changes is merged, otherwise bisect is broken.

They are needed on stable as well.

The following changes since commit c2333d898b52a9d64845522f18fd083534dc0a5b:

kvm: allow tpr patching to write to write-protected vapic option rom (2010-10-05 15:02:34 +0200)

are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/mst/qemu-kvm.git vhost

Michael S. Tsirkin (5):
virtio: invoke set_status callback on reset
virtio-net: unify vhost-net start/stop
vhost: fix up irqfd support
vhost: error code
msix: factor out mask notifier code

 hw/msix.c       |   82 +++++++++++++++++++++++++++++---------------------
 hw/msix.h       |    4 +-
 hw/pci.h        |    3 +-
 hw/vhost.c      |   54 ++++++++++++++++++---------------
 hw/virtio-net.c |   89 ++++++++++++++++++++++++++----------------------------
 hw/virtio-pci.c |   85 ++++++++++++++++++++++++++++++++++++++++++++++------
 hw/virtio.c     |    2 +
 hw/virtio.h     |    2 +-
 8 files changed, 201 insertions(+), 120 deletions(-)

MST