ppc patch queue 2017-04-26

Here's a respind of my first pull request for qemu-2.10, consisting of
assorted patches which have accumulated while qemu-2.9 stabilized.
Highlights are:
    * Rework / cleanup of the XICS interrupt controller
    * Substantial improvement to the 'powernv' machine type
        - Includes an MMIO XICS version
    * POWER9 support improvements
        - POWER9 guests with KVM
        - Partial support for POWER9 guests with TCG
    * IOMMU and VFIO improvements
    * Assorted minor changes

There are several IPMI patches here that aren't usually in my area of
maintenance, but there isn't a regular maintainer and these patches
are for the benefit of the powernv machine type.

This pull request supersedes my 2017-04-26 pull request.  This new set
fixes a bug in one of the aforementioned IPMI patches which caused
clang sanitizer failures (and may have crashed on some libc / host
versions).

# gpg: Signature made Wed 26 Apr 2017 07:58:10 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:                 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-2.10-20170426: (48 commits)
  MAINTAINERS: Remove myself from e500
  target/ppc: Style fixes
  e500,book3s: mfspr 259: Register mapped/aliased SPRG3 user read
  target/ppc: Flush TLB on write to PIDR
  spapr-cpu-core: Release ICPState object during CPU unrealization
  ppc/pnv: generate an OEM SEL event on shutdown
  ppc/pnv: add initial IPMI sensors for the BMC simulator
  ppc/pnv: populate device tree for IPMI BT devices
  ppc/pnv: populate device tree for serial devices
  ppc/pnv: populate device tree for RTC devices
  ppc/pnv: scan ISA bus to populate device tree
  ppc/pnv: enable only one LPC bus
  ppc/pnv: Add support for POWER8+ LPC Controller
  spapr: remove the 'nr_servers' field from the machine
  target/ppc: Fix size of struct PPCElfPrstatus
  ipmi: introduce an ipmi_bmc_gen_event() API
  ipmi: introduce an ipmi_bmc_sdr_find() API
  ipmi: provide support for FRUs
  ipmi: use a file to load SDRs
  ppc: add IPMI support
  ...

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