T7397: add "system kernel option quiet" to suppress boot messages

Add option to limit the number of messages that are displayed on the console
during the boot process and to persist this setting with image upgrades.

set system option kernel quiet

1 files changed, 30 insertions, 2 deletions

diff --git a/smoketest/scripts/cli/test_system_option.py b/smoketest/scripts/cli/test_system_option.py
index f3112cf0b..4daa812c0 100755
--- a/smoketest/scripts/cli/test_system_option.py
+++ b/smoketest/scripts/cli/test_system_option.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 #
-# Copyright (C) 2024 VyOS maintainers and contributors
+# Copyright (C) 2024-2025 VyOS maintainers and contributors
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 2 or later as
@@ -16,14 +16,18 @@
 
 import os
 import unittest
+
 from base_vyostest_shim import VyOSUnitTestSHIM
+
+from vyos.configsession import ConfigSessionError
+from vyos.utils.cpu import get_cpus
 from vyos.utils.file import read_file
 from vyos.utils.process import is_systemd_service_active
 from vyos.utils.system import sysctl_read
+from vyos.system import image
 
 base_path = ['system', 'option']
 
-
 class TestSystemOption(VyOSUnitTestSHIM.TestCase):
     def tearDown(self):
         self.cli_delete(base_path)
@@ -96,6 +100,30 @@ class TestSystemOption(VyOSUnitTestSHIM.TestCase):
         self.cli_commit()
         self.assertFalse(os.path.exists(ssh_client_opt_file))
 
+    def test_kernel_options(self):
+        amd_pstate_mode = 'active'
+
+        self.cli_set(['system', 'option', 'kernel', 'disable-mitigations'])
+        self.cli_set(['system', 'option', 'kernel', 'disable-power-saving'])
+        self.cli_set(['system', 'option', 'kernel', 'quiet'])
+
+        self.cli_set(['system', 'option', 'kernel', 'amd-pstate-driver', amd_pstate_mode])
+        cpu_vendor = get_cpus()[0]['vendor_id']
+        if cpu_vendor != 'AuthenticAMD':
+            with self.assertRaises(ConfigSessionError):
+                self.cli_commit()
+            self.cli_delete(['system', 'option', 'kernel', 'amd-pstate-driver'])
+
+        self.cli_commit()
+
+        # Read GRUB config file for current running image
+        tmp = read_file(f'{image.grub.GRUB_DIR_VYOS_VERS}/{image.get_running_image()}.cfg')
+        self.assertIn(' mitigations=off', tmp)
+        self.assertIn(' intel_idle.max_cstate=0 processor.max_cstate=1', tmp)
+        self.assertIn(' quiet', tmp)
+
+        if cpu_vendor == 'AuthenticAMD':
+            self.assertIn(f' initcall_blacklist=acpi_cpufreq_init amd_pstate={amd_pstate_mode}', tmp)
 
 if __name__ == '__main__':
     unittest.main(verbosity=2)