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[PATCH v4 0/5] MIPS: perf: Add support for 64-bit MIPS hardware counters

Subject: [PATCH v4 0/5] MIPS: perf: Add support for 64-bit MIPS hardware counters.
From: David Daney <>
Date: Fri, 20 May 2011 14:39:17 -0700
Cc: David Daney <>, Deng-Cheng Zhu <>
Original-recipient: rfc822;
MIPS hardware performance counters may have either 32-bit or 64-bit
wide counter registers.  The current implementation only supports the
32-bit variety.

These patches aim to add support for 64-bit wide counters while
mantaining support for 32-bit.

Tested with perf top and perf record, which both work well on an
Octeon/Debian based system.

Changes from v3:

o Rebased against 2.6.39.

o Re-Include Octeon processor support.

Changes from v2:

o Quit sign extending 32-bit counter values.

o Remove usless local_irq_save() in several places.

Changes from v1:

o Removed Octeon processor support to a separate patch set.

o Rebased against v5 of Deng-Cheng Zhu's cleanups:

o Tried to fix problem where 32-bit counters generated way too many

David Daney (5):
  MIPS: Add accessor macros for 64-bit performance counter registers.
  MIPS: perf: Cleanup formatting in arch/mips/kernel/perf_event.c
  MIPS: perf: Reorganize contents of perf support files.
  MIPS: perf: Add support for 64-bit perf counters.
  MIPS: perf: Add Octeon support for hardware perf.

 arch/mips/Kconfig                    |    2 +-
 arch/mips/include/asm/mipsregs.h     |    8 +
 arch/mips/kernel/Makefile            |    5 +-
 arch/mips/kernel/perf_event.c        |  521 +--------------
 arch/mips/kernel/perf_event_mipsxx.c | 1267 ++++++++++++++++++++++++---------
 5 files changed, 935 insertions(+), 868 deletions(-)

Cc: Deng-Cheng Zhu <>

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