[PATCH V6 3/4] selftests: amd-pstate: Add test trigger for amd-pstate driver

[Meng Li <li.meng@amd.com>]

Add amd-pstate test trigger in kselftest, it will load/unload
amd-pstate-ut module to test some cases etc.

Signed-off-by: Meng Li <li.meng@amd.com>
Acked-by: Huang Rui <ray.huang@amd.com>
---
 tools/testing/selftests/Makefile              |  1 +
 tools/testing/selftests/amd-pstate/Makefile   |  8 +++++
 .../selftests/amd-pstate/amd-pstate-ut.sh     | 34 +++++++++++++++++++
 tools/testing/selftests/amd-pstate/config     |  1 +
 4 files changed, 44 insertions(+)
 create mode 100644 tools/testing/selftests/amd-pstate/Makefile
 create mode 100755 tools/testing/selftests/amd-pstate/amd-pstate-ut.sh
 create mode 100644 tools/testing/selftests/amd-pstate/config

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 2319ec87f53d..975c13368286 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 TARGETS += alsa
+TARGETS += amd-pstate
 TARGETS += arm64
 TARGETS += bpf
 TARGETS += breakpoints
diff --git a/tools/testing/selftests/amd-pstate/Makefile b/tools/testing/selftests/amd-pstate/Makefile
new file mode 100644
index 000000000000..e1432112fb70
--- /dev/null
+++ b/tools/testing/selftests/amd-pstate/Makefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0-only
+# Makefile for amd-pstate/ function selftests
+
+TEST_PROGS := amd-pstate-ut.sh
+
+include ../lib.mk
+
+$(TEST_GEN_FILES): $(HEADERS)
diff --git a/tools/testing/selftests/amd-pstate/amd-pstate-ut.sh b/tools/testing/selftests/amd-pstate/amd-pstate-ut.sh
new file mode 100755
index 000000000000..970f7a76c7d5
--- /dev/null
+++ b/tools/testing/selftests/amd-pstate/amd-pstate-ut.sh
@@ -0,0 +1,34 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+# amd-pstate-ut is a test module for testing the amd-pstate driver.
+# (1) It can help all users to verify their processor support
+# (SBIOS/Firmware or Hardware).
+# (2) Kernel can have a basic function test to avoid the kernel
+# regression during the update.
+# (3) We can introduce more functional or performance tests to align
+# the result together, it will benefit power and performance scale optimization.
+
+# Kselftest framework requirement - SKIP code is 4.
+ksft_skip=4
+
+if ! uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ | grep -q x86; then
+	echo "$0 # Skipped: Test can only run on x86 architectures."
+	exit $ksft_skip
+fi
+
+msg="Skip all tests:"
+if [ ! -w /dev ]; then
+    echo $msg please run this as root >&2
+    exit $ksft_skip
+fi
+
+scaling_driver=$(cat /sys/devices/system/cpu/cpufreq/policy0/scaling_driver)
+
+if [ "$scaling_driver" != "amd-pstate" ]; then
+	echo "$0 # Skipped: Test can only run on amd-pstate driver."
+	echo "$0 # Current cpufreq scaling drvier is $scaling_driver."
+	exit $ksft_skip
+fi
+
+$(dirname $0)/../kselftest/module.sh "amd-pstate-ut" amd-pstate-ut
diff --git a/tools/testing/selftests/amd-pstate/config b/tools/testing/selftests/amd-pstate/config
new file mode 100644
index 000000000000..f43103c9adc4
--- /dev/null
+++ b/tools/testing/selftests/amd-pstate/config
@@ -0,0 +1 @@
+CONFIG_X86_AMD_PSTATE_UT=m
-- 
2.25.1