Kernel Parameters

This section documents kernel command-line parameters supported by Asterinas.

Inherited from Linux

init

Run the specified binary as init.

Example:

init=/bin/busybox

Notes:

• The value is the path to the executable.
• If omitted, Asterinas will fail to boot.

console

Select console devices for kernel messages. This parameter may be specified multiple times. Kernel messages are delivered to each listed console.

Valid values:

• tty0
• ttyS0
• hvc0

Examples:

console=ttyS0
console=ttyS0 console=hvc0

Asterinas-specific

ostd.log_level

Set the verbosity level for Asterinas’s logs.

Valid values:

• off
• error
• warn
• info
• debug
• trace

Example:

ostd.log_level=error

i8042.exist

Override ACPI’s indication of whether a PS/2 (i8042) controller exists.

Valid values:

• 1, on, yes, true or no value — treat the i8042 controller as present (force probing)
• 0, off, no, false - treat the i8042 controller as absent (skip probing)

Examples:

i8042.exist
i8042.exist=1
i8042.exist=0