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| author |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2021-04-26 17:03:22 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2021-04-26 17:03:22 +0200 |
| commit | ab497507c0e4df6282b9212c40cbc7acd5c55cdd (patch) | |
| tree | d361a0ec2c31378b4d7dc5defea20ba7b2c593fe /Documentation | |
| parent | Merge branches 'acpi-pci' and 'acpi-processor' (diff) | |
| parent | hwmon: acpi_power_meter: Get rid of ACPICA message printing (diff) | |
| download | linux-dev-ab497507c0e4df6282b9212c40cbc7acd5c55cdd.tar.xz linux-dev-ab497507c0e4df6282b9212c40cbc7acd5c55cdd.zip | |
Merge branch 'acpi-messages'
* acpi-messages:
hwmon: acpi_power_meter: Get rid of ACPICA message printing
IIO: acpi-als: Get rid of ACPICA message printing
ACPI: utils: Introduce acpi_evaluation_failure_warn()
ACPI: Drop unused ACPI_*_COMPONENT definitions and update documentation
ACPI: sysfs: Get rid of ACPICA message printing
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/firmware-guide/acpi/debug.rst | 30 |
1 files changed, 12 insertions, 18 deletions
diff --git a/Documentation/firmware-guide/acpi/debug.rst b/Documentation/firmware-guide/acpi/debug.rst index 0c979d8e45d7..0639c9de07f9 100644 --- a/Documentation/firmware-guide/acpi/debug.rst +++ b/Documentation/firmware-guide/acpi/debug.rst @@ -1,18 +1,17 @@ .. SPDX-License-Identifier: GPL-2.0 -================= -ACPI Debug Output -================= +==================== +ACPI CA Debug Output +==================== -The ACPI CA, the Linux ACPI core, and some ACPI drivers can generate debug -output. This document describes how to use this facility. +The ACPI CA can generate debug output. This document describes how to use this +facility. Compile-time configuration ========================== -ACPI debug output is globally enabled by CONFIG_ACPI_DEBUG. If this config -option is turned off, the debug messages are not even built into the -kernel. +The ACPI CA debug output is globally enabled by CONFIG_ACPI_DEBUG. If this +config option is not set, the debug messages are not even built into the kernel. Boot- and run-time configuration ================================ @@ -27,16 +26,16 @@ debug_layer (component) ======================= The "debug_layer" is a mask that selects components of interest, e.g., a -specific driver or part of the ACPI interpreter. To build the debug_layer -bitmask, look for the "#define _COMPONENT" in an ACPI source file. +specific part of the ACPI interpreter. To build the debug_layer bitmask, look +for the "#define _COMPONENT" in an ACPI source file. You can set the debug_layer mask at boot-time using the acpi.debug_layer command line argument, and you can change it after boot by writing values to /sys/module/acpi/parameters/debug_layer. -The possible components are defined in include/acpi/acoutput.h and -include/acpi/acpi_drivers.h. Reading /sys/module/acpi/parameters/debug_layer -shows the supported mask values, currently these:: +The possible components are defined in include/acpi/acoutput.h. + +Reading /sys/module/acpi/parameters/debug_layer shows the supported mask values:: ACPI_UTILITIES 0x00000001 ACPI_HARDWARE 0x00000002 @@ -52,11 +51,6 @@ shows the supported mask values, currently these:: ACPI_CA_DISASSEMBLER 0x00000800 ACPI_COMPILER 0x00001000 ACPI_TOOLS 0x00002000 - ACPI_SBS_COMPONENT 0x00100000 - ACPI_FAN_COMPONENT 0x00200000 - ACPI_CONTAINER_COMPONENT 0x01000000 - ACPI_SYSTEM_COMPONENT 0x02000000 - ACPI_MEMORY_DEVICE_COMPONENT 0x08000000 debug_level =========== |