Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-2.7-20160705' into staging

ppc patch queue for 2016-07-05

Here's the current ppc, sPAPR and related drivers patch queue.

  * The big addition is dynamic DMA window support (this includes some
    core VFIO changes)
  * There are also several fixes to the MMU emulation for bugs
    introduced with the HV mode patches
  * Several other bugfixes and cleanups

Changes in v2:
  I messed up and forgot to make a fix in the last patch which BenH
  pointed out (introduced by my rebasing).  That's fixed in this
  version, and I'm replacing the tag in place with the revised
  version.

# gpg: Signature made Tue 05 Jul 2016 06:28:58 BST
# gpg:                using RSA key 0x6C38CACA20D9B392
# gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>"
# gpg:                 aka "David Gibson (Red Hat) <dgibson@redhat.com>"
# gpg:                 aka "David Gibson (ozlabs.org) <dgibson@ozlabs.org>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E  87DC 6C38 CACA 20D9 B392

* remotes/dgibson/tags/ppc-for-2.7-20160705:
  ppc/hash64: Fix support for LPCR:ISL
  ppc/hash64: Add proper real mode translation support
  target-ppc: Return page shift from PTEG search
  target-ppc: Simplify HPTE matching
  target-ppc: Correct page size decoding in ppc_hash64_pteg_search()
  ppc: simplify ppc_hash64_hpte_page_shift_noslb()
  spapr_pci/spapr_pci_vfio: Support Dynamic DMA Windows (DDW)
  vfio/spapr: Create DMA window dynamically (SPAPR IOMMU v2)
  vfio: Add host side DMA window capabilities
  vfio: spapr: Add DMA memory preregistering (SPAPR IOMMU v2)
  spapr_iommu: Realloc guest visible TCE table when starting/stopping listening
  ppc: simplify max_smt initialization in ppc_cpu_realizefn()
  spapr: Ensure thread0 of CPU core is always realized first
  ppc: Fix xsrdpi, xvrdpi and xvrspi rounding

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

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