The following patchset adds address masks to existing perf hardware
breakpoint mechanism to allow trapping on an address range (currently
only single address) on supported architectures.
perf uapi is updated, x86 AMD implementation (for AMD Family 16h and
beyond) is provided, and perf tool has been extended to do:
$ perf stat -e mem:0x1000/0xf:w a.out
^^^
"don't care" bit mask
which will count writes to [0x1000 ~ 0x1010)
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 (2):
perf: Add hardware breakpoint address mask
perf/x86/amd: AMD implementation for hardware breakpoint address mask
Suravee Suthikulpanit (2):
perf tools: Add hardware breakpoint address mask event parser
perf tools: Add hardware breakpoint address mask 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 | 6 ++++
arch/x86/kernel/cpu/amd.c | 19 +++++++++++++
arch/x86/kernel/hw_breakpoint.c | 16 +++++++++++
include/uapi/linux/perf_event.h | 5 +++-
kernel/events/hw_breakpoint.c | 9 ++++++
tools/perf/Documentation/perf-record.txt | 14 +++++++---
tools/perf/tests/parse-events.c | 45 ++++++++++++++++++++++++++++++
tools/perf/util/parse-events.c | 5 ++--
tools/perf/util/parse-events.h | 2 +-
tools/perf/util/parse-events.l | 1 +
tools/perf/util/parse-events.y | 24 ++++++++++++++--
14 files changed, 144 insertions(+), 10 deletions(-)
--
1.7.9.5
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