commit <249fad734a25> ""powerpc/perf: Disable trace_imc pmu"
disables IMC(In-Memory Collection) trace-mode in kernel, since frequent
mode switching between accumulation mode and trace mode via the spr LDBAR
in the hardware can trigger a checkstop(system crash).
This patch series re-enables IMC trace mode and fixes the mode switching
issue by global lock mechanism.
Patch 3/5,4/5 and 5/5 provides a selftest to verify the global-lock
mechanism.
Changes from v1 -> v2:
-------------------------
- Added self test patches to the series.
Anju T Sudhakar (2):
powerpc/powernv: Re-enable imc trace-mode in kernel
powerpc/perf: Implement a global lock to avoid races between trace,
core and thread imc events.
Madhavan Srinivasan (3):
powerpc/perf: Add an interface sub-folder to imc pmu
selftest/powerpc/pmc: Support to include interface test for Memory
Counter PMUs
selftest/powerpc/pmu: Testcase for imc global lock mechanism
arch/powerpc/include/asm/imc-pmu.h | 11 +-
arch/powerpc/perf/imc-pmu.c | 196 +++++++++++++++---
arch/powerpc/platforms/powernv/opal-imc.c | 9 +-
tools/testing/selftests/powerpc/pmu/Makefile | 7 +-
.../powerpc/pmu/mem_counters/Makefile | 21 ++
.../pmu/mem_counters/imc_global_lock_test.c | 68 ++++++
.../powerpc/pmu/mem_counters/mem_counters.c | 99 +++++++++
.../powerpc/pmu/mem_counters/mem_counters.h | 36 ++++
8 files changed, 408 insertions(+), 39 deletions(-)
create mode 100644 tools/testing/selftests/powerpc/pmu/mem_counters/Makefile
create mode 100644
tools/testing/selftests/powerpc/pmu/mem_counters/imc_global_lock_test.c
create mode 100644
tools/testing/selftests/powerpc/pmu/mem_counters/mem_counters.c
create mode 100644
tools/testing/selftests/powerpc/pmu/mem_counters/mem_counters.h
--
2.18.1
