linux-kernel - [tip:perf/core] perf tools: Make coresight PMU listable

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Message-ID: <tip-7e21b0d579a481e2e7064c6383d5873d841777a8@git.kernel.org>
Date:   Thu, 22 Sep 2016 22:26:24 -0700
From:   tip-bot for Mathieu Poirier <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     alexander.shishkin@...ux.intel.com, peterz@...radead.org,
        hpa@...or.com, tglx@...utronix.de, acme@...hat.com,
        adrian.hunter@...el.com, mathieu.poirier@...aro.org,
        linux-kernel@...r.kernel.org, mingo@...nel.org, jolsa@...nel.org
Subject: [tip:perf/core] perf tools: Make coresight PMU listable

Commit-ID:  7e21b0d579a481e2e7064c6383d5873d841777a8
Gitweb:     http://git.kernel.org/tip/7e21b0d579a481e2e7064c6383d5873d841777a8
Author:     Mathieu Poirier <mathieu.poirier@...aro.org>
AuthorDate: Fri, 16 Sep 2016 09:49:59 -0600
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Thu, 22 Sep 2016 12:19:35 -0300

perf tools: Make coresight PMU listable

Adding the required mechanic allowing 'perf list pmu' to discover
coresight ETM/PTM tracers.

Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
Acked-by: Adrian Hunter <adrian.hunter@...el.com>
Acked-by: Jiri Olsa <jolsa@...nel.org>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: linux-arm-kernel@...ts.infradead.org
Link: http://lkml.kernel.org/r/1474041004-13956-3-git-send-email-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 MAINTAINERS                                        |  1 +
 tools/perf/arch/arm/util/Build                     |  2 ++
 .../perf/arch/arm/util/pmu.c                       | 26 ++++++++++++----------
 tools/perf/arch/arm64/util/Build                   |  2 ++
 4 files changed, 19 insertions(+), 12 deletions(-)

diff --git a/MAINTAINERS b/MAINTAINERS
index db814a8..7407fe7 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1123,6 +1123,7 @@ 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 f98da17..4093fd1 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-$(CONFIG_LOCAL_LIBUNWIND)    += unwind-libunwind.o
 libperf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
+
+libperf-$(CONFIG_AUXTRACE) += pmu.o
diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.h b/tools/perf/arch/arm/util/pmu.c
similarity index 66%
copy from drivers/hwtracing/coresight/coresight-etm-perf.h
copy to tools/perf/arch/arm/util/pmu.c
index 87f5a13..af9fb66 100644
--- a/drivers/hwtracing/coresight/coresight-etm-perf.h
+++ b/tools/perf/arch/arm/util/pmu.c
@@ -15,18 +15,20 @@
  * this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef _CORESIGHT_ETM_PERF_H
-#define _CORESIGHT_ETM_PERF_H
+#include <string.h>
+#include <linux/coresight-pmu.h>
+#include <linux/perf_event.h>
 
-struct coresight_device;
-
-#ifdef CONFIG_CORESIGHT
-int etm_perf_symlink(struct coresight_device *csdev, bool link);
-
-#else
-static inline int etm_perf_symlink(struct coresight_device *csdev, bool link)
-{ return -EINVAL; }
-
-#endif /* CONFIG_CORESIGHT */
+#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/arch/arm64/util/Build b/tools/perf/arch/arm64/util/Build
index 02f41db..3876dd0 100644
--- a/tools/perf/arch/arm64/util/Build
+++ b/tools/perf/arch/arm64/util/Build
@@ -1,2 +1,4 @@
 libperf-$(CONFIG_DWARF)     += dwarf-regs.o
 libperf-$(CONFIG_LOCAL_LIBUNWIND) += unwind-libunwind.o
+
+libperf-$(CONFIG_AUXTRACE) += ../../arm/util/pmu.o