ARM perf events support v4

This is the fourth revision of ARM performance counter support. This adds
support for software performance events on all ARM platforms and hardware
support for v6 processors. There is a generic PMU framework to allow for v7
and later to be added in the future.

Jamie Iles (5):
      arm: provide a mechanism to reserve performance counters
      arm/oprofile: reserve the PMU when starting
      arm: use the spinlocked, generic atomic64 support
      arm: enable support for software perf events
      arm/perfevents: implement perf event support for ARMv6

 arch/arm/Kconfig                        |   16 +
 arch/arm/include/asm/atomic.h           |    4 +
 arch/arm/include/asm/perf_event.h       |   38 +
 arch/arm/include/asm/pmu.h              |   74 ++
 arch/arm/kernel/Makefile                |    2 +
 arch/arm/kernel/perf_event.c            | 1338 +++++++++++++++++++++++++++++++
 arch/arm/kernel/pmu.c                   |  107 +++
 arch/arm/mm/fault.c                     |    7 +
 arch/arm/oprofile/op_model_arm11_core.c |    4 +-
 arch/arm/oprofile/op_model_arm11_core.h |    4 +-
 arch/arm/oprofile/op_model_mpcore.c     |   42 +-
 arch/arm/oprofile/op_model_v6.c         |   30 +-
 arch/arm/oprofile/op_model_v7.c         |   30 +-
 arch/arm/oprofile/op_model_v7.h         |    4 +-
 arch/arm/oprofile/op_model_xscale.c     |   35 +-
 15 files changed, 1671 insertions(+), 64 deletions(-)

Jamie