This patchset aims to integrate configuration and control of the Coresight tracers with the perf sub-system. The goal is to use PMUs to represent tracers and the auxiliary buffer enhancement to collect processor traces. As such a lot of work is done to move the current Coresight sysFS oriented configuration and control commands to perf's AUX API. For the time being the work concentrates on ETMv3 and ETB1.0 sink buffer. Work on ETMv4 and other type of sink buffers will follow once a foundation has been established. This patchset is based on [1] and assumes [2] has been applied. Best regards, Mathieu Changes since V7: * Moved coresight_release_path() a workqueue context, preventing pm_runtime_put_sync() from being called from an invalid (i.e interrupt) context. * Fixed wrong 'buf_ptr' type in function etb_update_buffer(). * In function auxtrace_record__init(), no longer setting the 'err' pointer to '-EINVAL'. * Removing erroneous call to kfree() in function etm_disable_sysfs(). [1]. https://git.linaro.org/kernel/coresight.git/shortlog/refs/heads/next [2]. http://www.spinics.net/lists/arm-kernel/msg474573.html Changes since V6: * Rebased to 4.4-rc5. * Thanks to [1], all tracer configuration now happens when events are scheduled. [1]. https://lwn.net/Articles/667573/ Changes since V5: * Addressed Arnaldo's comment about using a struct perf_evlist rather than a struct perf_session. * Addressed kbuild test robot's anomaly report [1]. * Moved perf_aux_output_{begin|end} to etm_event_{start|stop} in accordance with [2]. [1]. https://lkml.org/lkml/2015/11/30/46 [2]. http://thread.gmane.org/gmane.linux.kernel/2099328/focus=2099343 Changes since V4: * Reworked the way event configuration information is kept, fixing a few corner cases when doing per CPU tracing. * Rebased on 4.4-rc1. * Added 'Cc' to specific perf related patches in the hope of suscitating interest from reviewers, i.e perf maintainers. Changes since V3: * Rebased to GKH's char-misc-next tree (e2d8680741ed). Changes since V2: * Rebased to v4.3. * Used the -M option to "git format-patch". * Decoupled tracers and path - both are now completely independent. * Moved path enablement/release to Perf's add/del functions. * Moved PM runtime operations to the coresight core rather than individual drivers. * Enhanced mutual exclusion scheme between perf and sysFS. * Removed architecture specific define in perf cmd line tool. * Got rid of unused fields in structure 'cs_buffers'. * Enhanced changelog for patch 16/26. Changes since V1: * Fixed typos in typographical error in documentation. * Moved to a multi session support scheme. * Split static and dynamic tracer configuration. * Fixed configuration for user and kernel space tracing. * Using WARN_ON_ONCE() rather than WARN_ON(). * Implemented strategy to prevent tracers from being used simultaneously. * Changed sink_ops::unset_buffer() to sink_ops::reset_buffer(). * Moves ETM's sysFS interface from driver core to dedicated file. * Removed spinlock in "etm_cpu_id()". * Aggregated PMU driver pieces in a single patch. * Added user space changes and rebased everything to v4.3-rc5. Mathieu Poirier (23): coresight: associating path with session rather than tracer coresight: add API to get sink from path coresight: moving PM runtime operations to core framework coresight: etm3x: moving etm_readl/writel to header file coresight: etm3x: moving sysFS entries to dedicated file coresight: etm3x: unlocking tracers in default arch init coresight: etm3x: splitting struct etm_drvdata coresight: etm3x: adding operation mode for etm_enable() coresight: etm3x: set progbit to stop trace collection coresight: etm3x: changing default trace configuration coresight: etm3x: consolidating initial config coresight: etm3x: implementing user/kernel mode tracing coresight: etm3x: implementing perf_enable/disable() API coresight: etb10: moving to local atomic operations coresight: etb10: adding operation mode for sink->enable() coresight: etb10: implementing AUX API coresight: updating documentation to reflect integration with perf coresight: etm-perf: new PMU driver for ETM tracers coresight: introducing a global trace ID function perf tools: making function set_max_cpu_num() non static perf tools: adding perf_evlist to *info_priv_size() perf tools: making coresight PMU listable perf tools: adding coresight etm PMU record capabilities Documentation/trace/coresight.txt | 138 +- MAINTAINERS | 4 + drivers/hwtracing/coresight/Kconfig | 1 + drivers/hwtracing/coresight/Makefile | 4 +- drivers/hwtracing/coresight/coresight-etb10.c | 276 ++- drivers/hwtracing/coresight/coresight-etm-perf.c | 398 +++++ drivers/hwtracing/coresight/coresight-etm-perf.h | 32 + drivers/hwtracing/coresight/coresight-etm.h | 142 +- .../hwtracing/coresight/coresight-etm3x-sysfs.c | 1272 ++++++++++++++ drivers/hwtracing/coresight/coresight-etm3x.c | 1816 +++++--------------- drivers/hwtracing/coresight/coresight-etm4x.c | 10 +- drivers/hwtracing/coresight/coresight-funnel.c | 2 - drivers/hwtracing/coresight/coresight-priv.h | 15 + .../coresight/coresight-replicator-qcom.c | 4 - drivers/hwtracing/coresight/coresight-replicator.c | 2 - drivers/hwtracing/coresight/coresight-tmc.c | 7 +- drivers/hwtracing/coresight/coresight-tpiu.c | 4 +- drivers/hwtracing/coresight/coresight.c | 326 ++-- include/linux/coresight-pmu.h | 39 + include/linux/coresight.h | 31 +- tools/perf/arch/arm/util/Build | 2 + tools/perf/arch/arm/util/auxtrace.c | 54 + tools/perf/arch/arm/util/cs_etm.c | 466 +++++ tools/perf/arch/arm/util/cs_etm.h | 44 + tools/perf/arch/arm/util/pmu.c | 34 + tools/perf/arch/x86/util/intel-bts.c | 4 +- tools/perf/arch/x86/util/intel-pt.c | 4 +- tools/perf/config/Makefile | 17 +- tools/perf/util/auxtrace.c | 8 +- tools/perf/util/auxtrace.h | 7 +- tools/perf/util/cpumap.c | 2 +- tools/perf/util/cpumap.h | 1 + 32 files changed, 3522 insertions(+), 1644 deletions(-) create mode 100644 drivers/hwtracing/coresight/coresight-etm-perf.c create mode 100644 drivers/hwtracing/coresight/coresight-etm-perf.h create mode 100644 drivers/hwtracing/coresight/coresight-etm3x-sysfs.c create mode 100644 include/linux/coresight-pmu.h create mode 100644 tools/perf/arch/arm/util/auxtrace.c create mode 100644 tools/perf/arch/arm/util/cs_etm.c create mode 100644 tools/perf/arch/arm/util/cs_etm.h create mode 100644 tools/perf/arch/arm/util/pmu.c -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
