linux-kernel - [PATCH V4 0/3] perf/x86/amd: AMD Family 16h Data Breakpoint Extensions

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Date:	Sun, 28 Apr 2013 01:05:49 -0500
From:	Jacob Shin <jacob.shin@....com>
To:	Ingo Molnar <mingo@...hat.com>, Oleg Nesterov <oleg@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>
CC:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>, <x86@...nel.org>,
	Stephane Eranian <eranian@...gle.com>,
	Jiri Olsa <jolsa@...hat.com>, <linux-kernel@...r.kernel.org>,
	Will Deacon <will.deacon@....com>,
	Jacob Shin <jacob.shin@....com>
Subject: [PATCH V4 0/3] perf/x86/amd: AMD Family 16h Data Breakpoint Extensions

Oleg, Ingo, this is my final push for 3.10. I understand that it might
be too late for that .. if so I'll try again later for 3.11.

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

Will count writes to [0x1000 ~ 0x1010)

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 (3):
  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

 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          |   47 ++++++++++---------------
 tools/perf/Documentation/perf-record.txt |    7 ++--
 tools/perf/tests/parse-events.c          |   55 ++++++++++++++++++++++++++++++
 tools/perf/util/parse-events.c           |   17 ++++-----
 tools/perf/util/parse-events.h           |    2 +-
 tools/perf/util/parse-events.l           |    1 +
 tools/perf/util/parse-events.y           |   24 +++++++++++--
 12 files changed, 140 insertions(+), 44 deletions(-)

-- 
1.7.9.5


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