[PATCH 0/8] Support hardware perf counters on xtensa

[Max Filippov]

Hello,

this series adds support for hardware performance counters in counting and
sampling modes as well as for page fault counting. It reorganizes stack
stracing code to share it between old oprofile and new perf interfaces,
and improves kernel stack traces both for builtin debug functions and for
gdb.

Max Filippov (8):
  xtensa: clean up Kconfig dependencies for custom cores
  xtensa: keep exception/interrupt stack continuous
  xtensa: move oprofile stack tracing to stacktrace.c
  xtensa: select PERF_USE_VMALLOC for cache-aliasing configurations
  xtensa: add profiling IRQ type to xtensa_irq_map
  xtensa: count software page fault perf events
  xtensa: implement counting and sampling perf events
  perf tools: xtensa: add DWARF register names

 arch/xtensa/Kconfig                      |  22 +-
 arch/xtensa/include/asm/stacktrace.h     |   8 +
 arch/xtensa/kernel/Makefile              |   1 +
 arch/xtensa/kernel/entry.S               |  60 +++--
 arch/xtensa/kernel/irq.c                 |   6 +
 arch/xtensa/kernel/perf_event.c          | 450 +++++++++++++++++++++++++++++++
 arch/xtensa/kernel/stacktrace.c          | 167 +++++++++++-
 arch/xtensa/mm/fault.c                   |   7 +
 arch/xtensa/oprofile/backtrace.c         | 158 +----------
 tools/perf/arch/xtensa/Build             |   1 +
 tools/perf/arch/xtensa/Makefile          |   3 +
 tools/perf/arch/xtensa/util/Build        |   1 +
 tools/perf/arch/xtensa/util/dwarf-regs.c |  25 ++
 13 files changed, 725 insertions(+), 184 deletions(-)
 create mode 100644 arch/xtensa/kernel/perf_event.c
 create mode 100644 tools/perf/arch/xtensa/Build
 create mode 100644 tools/perf/arch/xtensa/Makefile
 create mode 100644 tools/perf/arch/xtensa/util/Build
 create mode 100644 tools/perf/arch/xtensa/util/dwarf-regs.c

-- 
1.8.1.4

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