[PATCH 5/7] perf report: Add -H (--hierarchy) option

[Namhyung Kim <namhyung@kernel.org>]

From: Namhyung Kim <namhyung.kim@lge.com>

It's for enabling the hierarchical view.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/Documentation/perf-report.txt | 5 +++++
 tools/perf/builtin-report.c              | 6 ++++++
 2 files changed, 11 insertions(+)

diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index 7d5f4f38aa52..3c86b9f83c54 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -210,6 +210,11 @@ OPTIONS
 	Demangle symbol names to human readable form. It's enabled by default,
 	disable with --no-demangle.
 
+-H::
+--hierarchy::
+	Show events in hierarchical view.  Each events are grouped under prior
+	sort keys.  Currently --gtk output is supported only.
+
 SEE ALSO
 --------
 linkperf:perf-stat[1], linkperf:perf-annotate[1]
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index d45bf9b0361d..9b9a35b296d8 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -809,6 +809,7 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
 	OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle,
 		    "Disable symbol demangling"),
 	OPT_BOOLEAN(0, "mem-mode", &report.mem_mode, "mem access profile"),
+	OPT_BOOLEAN('H', "hierarchy", &symbol_conf.hierarchy, "Hierarchical view"),
 	OPT_END()
 	};
 
@@ -833,6 +834,11 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
 			input_name = "perf.data";
 	}
 
+	if (symbol_conf.hierarchy && use_browser != 2) {
+		pr_err("--hierarchy option is only used for --gtk output\n");
+		return -EINVAL;
+	}
+
 	if (strcmp(input_name, "-") != 0)
 		setup_browser(true);
 	else {
-- 
1.7.11.7