Messages in this thread Patch in this message | | | From | Mathieu Poirier <> | Subject | [PATCH 1/2] perf tools: making coresight PMU listable | Date | Tue, 31 May 2016 11:10:32 -0600 |
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Adding the required mechanic allowing 'perf list pmu' to discover coresight ETM/PTM tracers.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> --- MAINTAINERS | 1 + tools/perf/MANIFEST | 1 + tools/perf/arch/arm/util/Build | 2 ++ tools/perf/arch/arm/util/pmu.c | 34 ++++++++++++++++++++++++++++++++++ tools/perf/config/Makefile | 11 ++++++++--- 5 files changed, 46 insertions(+), 3 deletions(-) create mode 100644 tools/perf/arch/arm/util/pmu.c
diff --git a/MAINTAINERS b/MAINTAINERS index 7304d2e37a98..d3451007718b 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1085,6 +1085,7 @@ F: drivers/hwtracing/coresight/* F: Documentation/trace/coresight.txt F: Documentation/devicetree/bindings/arm/coresight.txt F: Documentation/ABI/testing/sysfs-bus-coresight-devices-* +F: tools/perf/arch/arm/util/pmu.c ARM/CORGI MACHINE SUPPORT M: Richard Purdie <rpurdie@rpsys.net> diff --git a/tools/perf/MANIFEST b/tools/perf/MANIFEST index 8c8c6b9ce915..c6683e60e603 100644 --- a/tools/perf/MANIFEST +++ b/tools/perf/MANIFEST @@ -64,6 +64,7 @@ include/asm-generic/bitops/const_hweight.h include/asm-generic/bitops/fls64.h include/asm-generic/bitops/__fls.h include/asm-generic/bitops/fls.h +include/linux/coresight-pmu.h include/linux/perf_event.h include/linux/list.h include/linux/hash.h diff --git a/tools/perf/arch/arm/util/Build b/tools/perf/arch/arm/util/Build index d22e3d07de3d..66ab0b05549c 100644 --- a/tools/perf/arch/arm/util/Build +++ b/tools/perf/arch/arm/util/Build @@ -2,3 +2,5 @@ libperf-$(CONFIG_DWARF) += dwarf-regs.o libperf-$(CONFIG_LIBUNWIND) += unwind-libunwind.o libperf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o + +libperf-$(CONFIG_AUXTRACE) += pmu.o diff --git a/tools/perf/arch/arm/util/pmu.c b/tools/perf/arch/arm/util/pmu.c new file mode 100644 index 000000000000..af9fb666b44f --- /dev/null +++ b/tools/perf/arch/arm/util/pmu.c @@ -0,0 +1,34 @@ +/* + * Copyright(C) 2015 Linaro Limited. All rights reserved. + * Author: Mathieu Poirier <mathieu.poirier@linaro.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <string.h> +#include <linux/coresight-pmu.h> +#include <linux/perf_event.h> + +#include "../../util/pmu.h" + +struct perf_event_attr +*perf_pmu__get_default_config(struct perf_pmu *pmu __maybe_unused) +{ +#ifdef HAVE_AUXTRACE_SUPPORT + if (!strcmp(pmu->name, CORESIGHT_ETM_PMU_NAME)) { + /* add ETM default config here */ + pmu->selectable = true; + } +#endif + return NULL; +} diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile index 5ad0255f8756..494a672aa11d 100644 --- a/tools/perf/config/Makefile +++ b/tools/perf/config/Makefile @@ -681,9 +681,14 @@ ifdef LIBBABELTRACE endif ifndef NO_AUXTRACE - ifeq ($(feature-get_cpuid), 0) - msg := $(warning Your gcc lacks the __get_cpuid() builtin, disables support for auxtrace/Intel PT, please install a newer gcc); - NO_AUXTRACE := 1 + ifeq ($(ARCH),x86) + ifeq ($(feature-get_cpuid), 0) + msg := $(warning Your gcc lacks the __get_cpuid() builtin, disables support for auxtrace/Intel PT, please install a newer gcc); + NO_AUXTRACE := 1 + else + $(call detected,CONFIG_AUXTRACE) + CFLAGS += -DHAVE_AUXTRACE_SUPPORT + endif else $(call detected,CONFIG_AUXTRACE) CFLAGS += -DHAVE_AUXTRACE_SUPPORT -- 2.5.0
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