Merge remote-tracking branch 'bonzini/iommu-for-anthony' into staging

# By Paolo Bonzini (12) and others
# Via Paolo Bonzini
* bonzini/iommu-for-anthony: (25 commits)
  memory: render_memory_region: factor out fr constant setters
  memory: as_update_topology_pass: Improve comments
  memory: Fix comment typo
  memory: give name to every AddressSpace
  dma: eliminate DMAContext
  spapr_vio: take care of creating our own AddressSpace/DMAContext
  pci: use memory core for iommu support
  dma: eliminate old-style IOMMU support
  spapr: use memory core for iommu support
  spapr: make IOMMU translation go through IOMMUTLBEntry
  spapr: convert TCE API to use an opaque type
  vfio: abort if an emulated iommu is used
  memory: Add iommu map/unmap notifiers
  memory: iommu support
  memory: make section size a 128-bit integer
  exec: reorganize mem_add to match Int128 version
  Revert "s390x: reduce TARGET_PHYS_ADDR_SPACE_BITS to 62"
  Revert "memory: limit sections in the radix tree to the actual address space size"
  exec: return MemoryRegion from address_space_translate
  exec: Implement subpage_read/write via address_space_rw
  ...

Message-id: 1371739493-10187-1-git-send-email-pbonzini@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>