From aa6292f4845e7921fca60b146403ea6682b8f65d Mon Sep 17 00:00:00 2001
From: Mathieu Poirier <mathieu.poirier@linaro.org>
Date: Wed, 17 Jan 2018 10:52:10 -0700
Subject: 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>
---
 tools/perf/Makefile.config | 25 +++++++++++++++++++++++++
 tools/perf/Makefile.perf   |  2 ++
 2 files changed, 27 insertions(+)

(limited to 'tools/perf')

diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index a042ccca4e93..0dfdaa9fa81e 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -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
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 9a9b528a88bb..9b0351d3ce34 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -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
-- 
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