Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging

pci, pc fixes, features

A bunch of bugfixes - these will make sense for 2.1.1

Initial Intel IOMMU support.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

# gpg: Signature made Tue 02 Sep 2014 16:05:04 BST using RSA key ID D28D5469
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>"
# gpg:                 aka "Michael S. Tsirkin <mst@redhat.com>"

* remotes/mst/tags/for_upstream:
  vhost_net: start/stop guest notifiers properly
  pci: avoid losing config updates to MSI/MSIX cap regs
  virtio-net: don't run bh on vm stopped
  ioh3420: remove unused ioh3420_init() declaration
  vhost_net: cleanup start/stop condition
  intel-iommu: add IOTLB using hash table
  intel-iommu: add context-cache to cache context-entry
  intel-iommu: add supports for queued invalidation interface
  intel-iommu: fix coding style issues around in q35.c and machine.c
  intel-iommu: add Intel IOMMU emulation to q35 and add a machine option "iommu" as a switch
  intel-iommu: add DMAR table to ACPI tables
  intel-iommu: introduce Intel IOMMU (VT-d) emulation
  iommu: add is_write as a parameter to the translate function of MemoryRegionIOMMUOps

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

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