[PULL][Bionic] Restructure perf vendor event support for arm64

[dann frazier]

This PR comprises all clean cherry picks from upstream that
restructures arm64 perf vendor event support, followed by a fix to
enable that support for ThunderX2 B0 silicon. The latter could be
backported without the restructuring - indeed, that's what I plan to
submit for artful - however I think this larger backport is a better
approach for bionic. We'll very likely need to add support for other
arm64 platforms throughout the support life of bionic, and that will
be easier/safer if we're on the other side of this transition.

BugLink: https://bugs.launchpad.net/bugs/1760712

The following changes since commit e4a338d3e1f71c4cb11abc41fd571a6d9dc0ef67:

  UBUNTU: Ubuntu-4.15.0-14.15 (2018-04-02 16:09:51 -0300)

are available in the Git repository at:

  git://git.launchpad.net/~dannf/ubuntu/+source/linux/+git/linux lp1760712-bionic

for you to fetch changes up to 03c09f02d96a3a19e4cdc22b5c99c9c3c41bb339:

  perf vendor events arm64: Enable JSON events for ThunderX2 B0 (2018-04-03 12:18:32 -0600)

----------------------------------------------------------------
Ganapatrao Kulkarni (1):
      perf vendor events arm64: Enable JSON events for ThunderX2 B0

John Garry (11):
      perf vendor events: Drop incomplete multiple mapfile support
      perf vendor events: Fix error code in json_events()
      perf vendor events: Drop support for unused topic directories
      perf vendor events: Add support for pmu events vendor subdirectory
      perf vendor events arm64: Relocate ThunderX2 JSON to cavium subdirectory
      perf vendor events arm64: Relocate Cortex A53 JSONs to arm subdirectory
      perf vendor events: Add support for arch standard events
      perf vendor events arm64: Add armv8-recommended.json
      perf vendor events arm64: Fixup ThunderX2 to use recommended events
      perf vendor events arm64: fixup A53 to use recommended events
      perf vendor events arm64: add HiSilicon hip08 JSON file

William Cohen (1):
      perf vendor events aarch64: Add JSON metrics for ARM Cortex-A53 Processor

 tools/perf/pmu-events/Build                        |   2 +
 tools/perf/pmu-events/README                       |  15 +-
 .../arch/arm64/arm/cortex-a53/branch.json          |  25 ++
 .../pmu-events/arch/arm64/arm/cortex-a53/bus.json  |   8 +
 .../arch/arm64/arm/cortex-a53/cache.json           |  27 ++
 .../arch/arm64/arm/cortex-a53/memory.json          |  12 +
 .../arch/arm64/arm/cortex-a53/other.json           |  28 ++
 .../arch/arm64/arm/cortex-a53/pipeline.json        |  52 +++
 .../pmu-events/arch/arm64/armv8-recommended.json   | 452 +++++++++++++++++++++
 .../arch/arm64/cavium/thunderx2-imp-def.json       |  62 ---
 .../arch/arm64/cavium/thunderx2/core-imp-def.json  |  32 ++
 .../arch/arm64/hisilicon/hip08/core-imp-def.json   | 122 ++++++
 tools/perf/pmu-events/arch/arm64/mapfile.csv       |   5 +-
 tools/perf/pmu-events/jevents.c                    | 291 ++++++++++---
 14 files changed, 1019 insertions(+), 114 deletions(-)
 create mode 100644 tools/perf/pmu-events/arch/arm64/arm/cortex-a53/branch.json
 create mode 100644 tools/perf/pmu-events/arch/arm64/arm/cortex-a53/bus.json
 create mode 100644 tools/perf/pmu-events/arch/arm64/arm/cortex-a53/cache.json
 create mode 100644 tools/perf/pmu-events/arch/arm64/arm/cortex-a53/memory.json
 create mode 100644 tools/perf/pmu-events/arch/arm64/arm/cortex-a53/other.json
 create mode 100644 tools/perf/pmu-events/arch/arm64/arm/cortex-a53/pipeline.json
 create mode 100644 tools/perf/pmu-events/arch/arm64/armv8-recommended.json
 delete mode 100644 tools/perf/pmu-events/arch/arm64/cavium/thunderx2-imp-def.json
 create mode 100644 tools/perf/pmu-events/arch/arm64/cavium/thunderx2/core-imp-def.json
 create mode 100644 tools/perf/pmu-events/arch/arm64/hisilicon/hip08/core-imp-def.json