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perf tools: Integrating the CoreSight decoding library 

The Open CoreSight Decoding Library (openCSD) is a free and open library
to decode traces collected by the CoreSight hardware infrastructure.

This patch adds the required mechanic to recognise the presence of the
openCSD library on a system and set up miscellaneous flags to be used in
the compilation of the trace decoding feature.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kim Phillips <kim.phillips@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Mike Leach <mike.leach@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Link: http://lkml.kernel.org/r/1516211539-5166-2-git-send-email-mathieu.poirier@linaro.org
Link: http://lkml.kernel.org/r/1516635644-24819-1-git-send-email-mathieu.poirier@linaro.org
[ Merged missing test-libopencsd.c file, provided later by Mathieu ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Mathieu Poirier 2018-01-17 10:52:10 -07:00 committed by Arnaldo Carvalho de Melo
parent 5b50758c4b
commit aa6292f484
6 changed files with 48 additions and 2 deletions
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3
tools/build/Makefile.feature
View File

@ -66,7 +66,8 @@ FEATURE_TESTS_BASIC := \
bpf \
sched_getcpu \
sdt \
setns
setns \
libopencsd
# FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
# of all feature tests

7
tools/build/feature/Makefile
View File

@ -52,7 +52,8 @@ FILES= \
test-cxx.bin \
test-jvmti.bin \
test-sched_getcpu.bin \
test-setns.bin
test-setns.bin \
test-libopencsd.bin
FILES := $(addprefix $(OUTPUT),$(FILES))
@ -104,6 +105,10 @@ $(OUTPUT)test-sched_getcpu.bin:
$(OUTPUT)test-setns.bin:
$(BUILD)
$(OUTPUT)test-libopencsd.bin:
$(BUILD) # -lopencsd_c_api -lopencsd provided by
# $(FEATURE_CHECK_LDFLAGS-libopencsd)
DWARFLIBS := -ldw
ifeq ($(findstring -static,${LDFLAGS}),-static)
DWARFLIBS += -lelf -lebl -lz -llzma -lbz2

5
tools/build/feature/test-all.c
View File

@ -162,6 +162,10 @@
# include "test-setns.c"
#undef main
#define main main_test_libopencsd
# include "test-libopencsd.c"
#undef main
int main(int argc, char *argv[])
{
main_test_libpython();
@ -199,6 +203,7 @@ int main(int argc, char *argv[])
main_test_sched_getcpu();
main_test_sdt();
main_test_setns();
main_test_libopencsd();
return 0;
}

8
tools/build/feature/test-libopencsd.c Normal file
View File

@ -0,0 +1,8 @@
// SPDX-License-Identifier: GPL-2.0
#include <opencsd/c_api/opencsd_c_api.h>
int main(void)
{
(void)ocsd_get_version();
return 0;
}

25
tools/perf/Makefile.config
View File

@ -105,6 +105,16 @@ FEATURE_CHECK_LDFLAGS-libunwind = $(LIBUNWIND_LDFLAGS) $(LIBUNWIND_LIBS)
FEATURE_CHECK_CFLAGS-libunwind-debug-frame = $(LIBUNWIND_CFLAGS)
FEATURE_CHECK_LDFLAGS-libunwind-debug-frame = $(LIBUNWIND_LDFLAGS) $(LIBUNWIND_LIBS)
ifdef CSINCLUDES
LIBOPENCSD_CFLAGS := -I$(CSINCLUDES)
endif
OPENCSDLIBS := -lopencsd_c_api -lopencsd
ifdef CSLIBS
LIBOPENCSD_LDFLAGS := -L$(CSLIBS)
endif
FEATURE_CHECK_CFLAGS-libopencsd := $(LIBOPENCSD_CFLAGS)
FEATURE_CHECK_LDFLAGS-libopencsd := $(LIBOPENCSD_LDFLAGS) $(OPENCSDLIBS)
ifeq ($(NO_PERF_REGS),0)
CFLAGS += -DHAVE_PERF_REGS_SUPPORT
endif
@ -353,6 +363,21 @@ ifeq ($(feature-setns), 1)
$(call detected,CONFIG_SETNS)
endif
ifndef NO_CORESIGHT
ifeq ($(feature-libopencsd), 1)
CFLAGS += -DHAVE_CSTRACE_SUPPORT $(LIBOPENCSD_CFLAGS)
LDFLAGS += $(LIBOPENCSD_LDFLAGS)
EXTLIBS += $(OPENCSDLIBS)
$(call detected,CONFIG_LIBOPENCSD)
ifdef CSTRACE_RAW
CFLAGS += -DCS_DEBUG_RAW
ifeq (${CSTRACE_RAW}, packed)
CFLAGS += -DCS_RAW_PACKED
endif
endif
endif
endif
ifndef NO_LIBELF
CFLAGS += -DHAVE_LIBELF_SUPPORT
EXTLIBS += -lelf

2
tools/perf/Makefile.perf
View File

@ -98,6 +98,8 @@ include ../scripts/utilities.mak
# When selected, pass LLVM_CONFIG=/path/to/llvm-config to `make' if
# llvm-config is not in $PATH.
# Define NO_CORESIGHT if you do not want support for CoreSight trace decoding.
# As per kernel Makefile, avoid funny character set dependencies
unexport LC_ALL
LC_COLLATE=C