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Message-Id: <1450472361-426-24-git-send-email-mathieu.poirier@linaro.org>
Date: Fri, 18 Dec 2015 13:59:19 -0700
From: Mathieu Poirier <mathieu.poirier@...aro.org>
To: gregkh@...uxfoundation.org, alexander.shishkin@...ux.intel.com
Cc: zhang.chunyan@...aro.org, mike.leach@....com, tor@...com,
al.grant@....com, fainelli@...adcom.com,
linux-arm-kernel@...ts.infradead.org, linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org,
Mathieu Poirier <mathieu.poirier@...aro.org>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>
Subject: [PATCH V7 23/24] perf tools: making coresight PMU listable
Adding the required mechanic allowing 'perf list pmu' to
discover coresight ETM/PTM tracers.
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
---
MAINTAINERS | 1 +
tools/perf/arch/arm/util/Build | 2 ++
tools/perf/arch/arm/util/pmu.c | 34 ++++++++++++++++++++++++++++++++++
tools/perf/config/Makefile | 17 ++++++++++++-----
4 files changed, 49 insertions(+), 5 deletions(-)
create mode 100644 tools/perf/arch/arm/util/pmu.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 9bff63cf326e..e1a5de0e5733 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1007,6 +1007,7 @@ 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@...ys.net>
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@...aro.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 de89ec574361..905faabff8b1 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -647,12 +647,19 @@ 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
- $(call detected,CONFIG_AUXTRACE)
- CFLAGS += -DHAVE_AUXTRACE_SUPPORT
+ ifeq ($(ARCH),$(filter $(ARCH), arm arm64))
+ $(call detected,CONFIG_AUXTRACE)
+ CFLAGS += -DHAVE_AUXTRACE_SUPPORT
+ endif
endif
endif
--
2.1.4
--
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