Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-2.9-20170301' into staging

ppc patch queue for 2017-03-01

I was hoping to get this pull request squeezed in before the soft
freeze, but I ran into some difficulties during testing.  Everything
here was at least posted before the soft freeze, so I'm hoping we can
still merge it for 2.9.

The biggest things here are:
    * Cleanups to handling of hashed page tables, that will make
      adding support for the POWER9 MMU easier
    * Cleanups to the XICS interrupt controller that will make
      implementing the powernv machine easier
    * TCG implementation of extended overflow and carry handling for
      POWER9

It also includes:
    * Increasing the CPU limit for pseries to 1024 vCPUs
    * Generating proper OF node names in qemu (making hotplug and
      coldplug logic closer together)

# gpg: Signature made Wed 01 Mar 2017 04:43:06 GMT
# 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:                 aka "David Gibson (kernel.org) <dwg@kernel.org>"
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E  87DC 6C38 CACA 20D9 B392

* remotes/dgibson/tags/ppc-for-2.9-20170301: (50 commits)
  Add PowerPC 32-bit guest memory dump support
  ppc/xics: rename 'ICPState *' variables to 'icp'
  ppc/xics: move InterruptStatsProvider to the sPAPR machine
  ppc/xics: move ics-simple post_load under the machine
  ppc/xics: remove the XICSState classes
  ppc/xics: export the XICS init routines
  ppc/xics: move the ICP array under the sPAPR machine
  ppc/xics: register the reset handler of ICP objects
  ppc/xics: simplify spapr_dt_xics() interface
  ppc/xics: use the QOM interface to grab an ICP
  ppc/xics: move the cpu_setup() handler under the ICPState class
  ppc/xics: simplify the cpu_setup() handler
  ppc/xics: move kernel_xics_fd out of KVMXICSState
  ppc/xics: extend the QOM interface to handle ICPs
  ppc/xics: remove the XICS list of ICS
  ppc/xics: register the reset handler of ICS objects
  ppc/xics: remove xics_find_source()
  ppc/xics: use the QOM interface to resend irqs
  ppc/xics: use the QOM interface to get irqs
  ppc/xics: use the QOM interface under the sPAPR machine
  ...

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

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