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

2 files changed, 5 insertions, 1 deletions

diff --git a/src/conf_mode/system_option.py b/src/conf_mode/system_option.py
index b45a9d8a6..3d76a1eaa 100755
--- a/src/conf_mode/system_option.py
+++ b/src/conf_mode/system_option.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 #
-# Copyright (C) 2019-2024 VyOS maintainers and contributors
+# Copyright (C) 2019-2025 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
@@ -136,6 +136,8 @@ def generate(options):
             mode = options['kernel']['amd_pstate_driver']
             cmdline_options.append(
                 f'initcall_blacklist=acpi_cpufreq_init amd_pstate={mode}')
+        if 'quiet' in options['kernel']:
+            cmdline_options.append('quiet')
     grub_util.update_kernel_cmdline_options(' '.join(cmdline_options))
 
     return None
diff --git a/src/op_mode/image_installer.py b/src/op_mode/image_installer.py
index 2660309a5..540967c1f 100755
--- a/src/op_mode/image_installer.py
+++ b/src/op_mode/image_installer.py
@@ -504,6 +504,8 @@ def get_cli_kernel_options(config_file: str) -> list:
         mode = kernel_options['amd-pstate-driver']
         cmdline_options.append(
             f'initcall_blacklist=acpi_cpufreq_init amd_pstate={mode}')
+    if 'quiet' in kernel_options:
+        cmdline_options.append('quiet')
 
     return cmdline_options