[PATCH V6 0/4] perf/x86/amd: AMD Family 16h Data Breakpoint Extensions

[suravee.suthikulpanit]

From: Suravee Suthikulpanit <suravee.suthikulpanit@xxxxxxx>

The following patchset enables hardware breakpoint bp_len greater than
HW_BREAKPOINT_LEN_8 on AMD Family 16h and later.

  $ perf stat -e mem:0x1000/16:w a.out
                            ^^
                            bp_len

This will count writes to [0x1000 ~ 0x1010)

V6:
* Minor clean up in patch 1 and 2 based on comment from Frederic and Oleg.
* Split out changes in patch1 into patch4 per Frederic request.

V5:
* Rebase onto 3.12.0-rc3.
* Modify the tools/perf/util/parse-events.y due to change in
  parse_events_add_breakpoint().

V4:
Even more per Oleg's suggestion:
* Further simplify info->len and info->mask setting switch statement

V3:
More per Oleg's suggestion:
* Use already existing bp_len instead of changing userland API and
  in kernel turn bp_len into proper AMD hardware breakpoint address
  mask.

V2:
Per Oleg's suggestions:
* Moved testing of bp_addr_mask to validate_hw_breakpoint()
* Changed perf tool syntax to mem:<addr>[/addr_mask][:access]

Jacob Shin (4):
  perf/x86/amd: AMD support for bp_len > HW_BREAKPOINT_LEN_8
  perf tools: allow user to specify hardware breakpoint bp_len
  perf tools: add hardware breakpoint bp_len test cases
  perf/x86: Remove get_hbp_len and replace with bp_len

 arch/x86/include/asm/cpufeature.h        |  2 ++
 arch/x86/include/asm/debugreg.h          |  5 +++
 arch/x86/include/asm/hw_breakpoint.h     |  1 +
 arch/x86/include/uapi/asm/msr-index.h    |  4 +++
 arch/x86/kernel/cpu/amd.c                | 19 +++++++++++
 arch/x86/kernel/hw_breakpoint.c          | 45 ++++++++++----------------
 tools/perf/Documentation/perf-record.txt |  7 ++--
 tools/perf/tests/parse-events.c          | 55 ++++++++++++++++++++++++++++++++
 tools/perf/util/parse-events.c           | 21 ++++++------
 tools/perf/util/parse-events.h           |  2 +-
 tools/perf/util/parse-events.l           |  1 +
 tools/perf/util/parse-events.y           | 26 +++++++++++++--
 12 files changed, 145 insertions(+), 43 deletions(-)

-- 
1.8.1.2


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/