1 files changed, 69 insertions, 0 deletions
diff --git a/tools/testing/selftests/ftrace/test.d/direct/ftrace-direct.tc b/tools/testing/selftests/ftrace/test.d/direct/ftrace-direct.tc
new file mode 100644
index 000000000..d75a8695b
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/direct/ftrace-direct.tc
@@ -0,0 +1,69 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: Test ftrace direct functions against tracers
+
+rmmod ftrace-direct ||:
+if ! modprobe ftrace-direct ; then
+  echo "No ftrace-direct sample module - please make CONFIG_SAMPLE_FTRACE_DIRECT=m"
+  exit_unresolved;
+fi
+
+echo "Let the module run a little"
+sleep 1
+
+grep -q "my_direct_func: waking up" trace
+
+rmmod ftrace-direct
+
+test_tracer() {
+	tracer=$1
+
+	# tracer -> direct -> no direct > no tracer
+	echo $tracer > current_tracer
+	modprobe ftrace-direct
+	rmmod ftrace-direct
+	echo nop > current_tracer
+
+	# tracer -> direct -> no tracer > no direct
+	echo $tracer > current_tracer
+	modprobe ftrace-direct
+	echo nop > current_tracer
+	rmmod ftrace-direct
+
+	# direct -> tracer -> no tracer > no direct
+	modprobe ftrace-direct
+	echo $tracer > current_tracer
+	echo nop > current_tracer
+	rmmod ftrace-direct
+
+	# direct -> tracer -> no direct > no notracer
+	modprobe ftrace-direct
+	echo $tracer > current_tracer
+	rmmod ftrace-direct
+	echo nop > current_tracer
+}
+
+for t in `cat available_tracers`; do
+	if [ "$t" != "nop" ]; then
+		test_tracer $t
+	fi
+done
+
+echo nop > current_tracer
+rmmod ftrace-direct ||:
+
+# Now do the same thing with another direct function registered
+echo "Running with another ftrace direct function"
+
+rmmod ftrace-direct-too ||:
+modprobe ftrace-direct-too
+
+for t in `cat available_tracers`; do
+	if [ "$t" != "nop" ]; then
+		test_tracer $t
+	fi
+done
+
+echo nop > current_tracer
+rmmod ftrace-direct ||:
+rmmod ftrace-direct-too ||: