Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-2.7-20160729' into staging

ppc patch queue 2016-07-29

Here are the current pending ppc and spapr related patches for
qemu-2.7.  Given the freeze status, these are all bugfixes, with two
exceptions:

  * There's some final rework of the vcpu hotplug model.  Specifically
    we add spapr specific code on the generic basis Igor established
    to make cpu_index stable for pseries-2.7 and later machine types.
      - This allows us to remove the limitation that cpu cores had to
        be inserted in linear order, and removed in LIFO order.
      - This is worth merging this late in 2.7 because it will avoid
        considerable future grief with management layers needing to
        discover whether out-of-order hotplug is possible, amongst
        other things.
      - For now we do add a constraint that the initial cpu cannot be
        unplugged.
  * We add two extra testcases to make check, for postcopy and
    drive_del on ppc64.
      - Not strictly bugfixes, but safe, because they don't affect the
        actual code, and increase test coverage.

# gpg: Signature made Fri 29 Jul 2016 05:50:02 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-2.7-20160729:
  tests: add drive_del-test to ppc/ppc64
  spapr: Prevent boot CPU core removal
  ppc: Fix fault PC reporting for lve*/stve* VMX instructions
  test: port postcopy test to ppc64
  Revert "spapr: Ensure CPU cores are added contiguously and removed in LIFO order"
  spapr: init CPUState->cpu_index with index relative to core-id

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

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