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Commit b4d2730a authored by Len Brown's avatar Len Brown
Browse files

ACPI: document method tracing hooks



Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 4169c45f
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+3 −0
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@@ -14,6 +14,7 @@ Following translations are available on the WWW:
	- this file.
ABI/
	- info on kernel <-> userspace ABI and relative interface stability.

BUG-HUNTING
	- brute force method of doing binary search of patches to find bug.
Changes
@@ -66,6 +67,8 @@ VGA-softcursor.txt
	- how to change your VGA cursor from a blinking underscore.
accounting/
	- documentation on accounting and taskstats.
acpi/
	- info on ACPI-specific hooks in the kernel.
aoe/
	- description of AoE (ATA over Ethernet) along with config examples.
applying-patches.txt
+26 −0
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/sys/module/acpi/parameters/:

trace_method_name
	The AML method name that the user wants to trace

trace_debug_layer
	The temporary debug_layer used when tracing the method.
	Using 0xffffffff by default if it is 0.

trace_debug_level
	The temporary debug_level used when tracing the method.
	Using 0x00ffffff by default if it is 0.

trace_state
	The status of the tracing feature.

	"enabled" means this feature is enabled
	and the AML method is traced every time it's executed.

	"1" means this feature is enabled and the AML method
	will only be traced during the next execution.

	"disabled" means this feature is disabled.
	Users can enable/disable this debug tracing feature by
	"echo string > /sys/module/acpi/parameters/trace_state".
	"string" should be one of "enable", "disable" and "1".