[PATCH v3 11/11] perf c2c: Use 'peer' as default display for Arm64

[Leo Yan <leo.yan@linaro.org>]

Since Arm64 arch doesn't support HITMs flags, so use 'peer' as default
if user doesn't specify display type; for other arches, it still uses
'tot' as default display type if user doesn't specify it.

Suggested-by: Ali Saidi <alisaidi@amazon.com>
Signed-off-by: Leo Yan <leo.yan@linaro.org>
---
 tools/perf/builtin-c2c.c | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 3bd422c5e8ae..042431b7b6ba 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -2785,7 +2785,7 @@ static int setup_callchain(struct evlist *evlist)
 
 static int setup_display(const char *str)
 {
-	const char *display = str ?: "tot";
+	const char *display = str;
 
 	if (!strcmp(display, "tot"))
 		c2c.display = DISPLAY_TOT_HITM;
@@ -2971,9 +2971,6 @@ static int perf_c2c__report(int argc, const char **argv)
 	data.path  = input_name;
 	data.force = symbol_conf.force;
 
-	err = setup_display(display);
-	if (err)
-		goto out;
 
 	err = setup_coalesce(coalesce, no_source);
 	if (err) {
@@ -2994,6 +2991,22 @@ static int perf_c2c__report(int argc, const char **argv)
 		goto out;
 	}
 
+	/*
+	 * Use the 'tot' as default display type if user doesn't specify it;
+	 * since Arm64 platform doesn't support HITMs flag, use 'peer' as the
+	 * default display type.
+	 */
+	if (!display) {
+		if (!strcmp(perf_env__arch(&session->header.env), "arm64"))
+			display = "peer";
+		else
+			display = "tot";
+	}
+
+	err = setup_display(display);
+	if (err)
+		goto out_session;
+
 	session->itrace_synth_opts = &itrace_synth_opts;
 
 	err = setup_nodes(session);
-- 
2.25.1