1 .. SPDX-License-Identifier: GPL-2.0
2 .. include:: <isonum.txt>
8 :Copyright: |copy| 2016, Intel Corporation
9 :Author: Lv Zheng <lv.zheng@intel.com>
12 This document describes the usage of the AML debugger embedded in the Linux
18 The following kernel configuration items are required to enable the AML
19 debugger interface from the Linux kernel::
21 CONFIG_ACPI_DEBUGGER=y
22 CONFIG_ACPI_DEBUGGER_USER=m
24 The userspace utilities can be built from the kernel source tree using
25 the following commands::
30 The resultant userspace tool binary is then located at::
32 tools/power/acpi/acpidbg
34 It can be installed to system directories by running "make install" (as a
35 sufficiently privileged user).
37 2. Start the userspace debugger interface
38 =========================================
40 After booting the kernel with the debugger built-in, the debugger can be
41 started by using the following commands::
43 # mount -t debugfs none /sys/kernel/debug
45 # tools/power/acpi/acpidbg
47 That spawns the interactive AML debugger environment where you can execute
50 The commands are documented in the "ACPICA Overview and Programmer Reference"
51 that can be downloaded from
53 https://acpica.org/documentation
55 The detailed debugger commands reference is located in Chapter 12 "ACPICA
56 Debugger Reference". The "help" command can be used for a quick reference.
58 3. Stop the userspace debugger interface
59 ========================================
61 The interactive debugger interface can be closed by pressing Ctrl+C or using
62 the "quit" or "exit" commands. When finished, unload the module with::
66 The module unloading may fail if there is an acpidbg instance running.
68 4. Run the debugger in a script
69 ===============================
71 It may be useful to run the AML debugger in a test script. "acpidbg" supports
72 this in a special "batch" mode. For example, the following command outputs
73 the entire ACPI namespace::
75 # acpidbg -b "namespace"