[PATCH v3 5/7] perf tools: Use ioctl to communicate driver configuration to kernel
From: mathieu.poirier@linaro.org (Mathieu Poirier)
Date: 2018-07-18 21:48:27
Also in:
lkml
Subsystem:
performance events subsystem, the rest · Maintainers:
Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo, Namhyung Kim, Linus Torvalds
Following in the footsteps of what was done for filters, adding the necessary mechanic needed to push down driver specific configuration to the kernel using an ioctl. By proceeding this way PMU specific configuration such as CoreSight sink specification can be communicated to each event. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> --- tools/perf/util/evsel.c | 7 +++++++ tools/perf/util/evsel.h | 1 + 2 files changed, 8 insertions(+)
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 94fce4f537e9..534aca4c642c 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c@@ -1162,6 +1162,13 @@ static int perf_evsel__append_filter(struct perf_evsel *evsel, return -1; } +int perf_evsel__apply_drv_config(struct perf_evsel *evsel, const char *config) +{ + return perf_evsel__run_ioctl(evsel, + PERF_EVENT_IOC_SET_DRV_CONFIG, + (void *)config); +} + int perf_evsel__append_tp_filter(struct perf_evsel *evsel, const char *filter) { return perf_evsel__append_filter(evsel, "(%s) && (%s)", filter);
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index d277930b19a1..0f671bd2a988 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h@@ -271,6 +271,7 @@ int perf_evsel__append_tp_filter(struct perf_evsel *evsel, const char *filter); int perf_evsel__append_addr_filter(struct perf_evsel *evsel, const char *filter); int perf_evsel__apply_filter(struct perf_evsel *evsel, const char *filter); +int perf_evsel__apply_drv_config(struct perf_evsel *evsel, const char *config); int perf_evsel__enable(struct perf_evsel *evsel); int perf_evsel__disable(struct perf_evsel *evsel);
--
2.7.4