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Commit 6ef19ab7 authored by Chen Gong's avatar Chen Gong Committed by Len Brown
Browse files

Update documentation for parameter *notrigger* in einj.txt 



Add description of parameter notrigger in the einj.txt.
One can utilize this new parameter to do some SRAR injection
test. Pay attention, the operation is highly depended on the
BIOS implementation. If no proper BIOS supports it, even if
enabling this parameter, expected result will not happen.

v2:
  Update the documentation suggested by Tony

Suggested-by: default avatarTony Luck <tony.luck@intel.com>
Signed-off-by: default avatarChen Gong <gong.chen@linux.intel.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent ee49089d

Documentation/acpi/apei/einj.txt

+8 −0
Original line number Diff line number Diff line
@@ -53,6 +53,14 @@ directory apei/einj. The following files are provided. 
  This file is used to set the second error parameter value. Effect of

  parameter depends on error_type specified.



- notrigger

  The EINJ mechanism is a two step process. First inject the error, then

  perform some actions to trigger it. Setting "notrigger" to 1 skips the

  trigger phase, which *may* allow the user to cause the error in some other

  context by a simple access to the cpu, memory location, or device that is

  the target of the error injection. Whether this actually works depends

  on what operations the BIOS actually includes in the trigger phase.



BIOS versions based in the ACPI 4.0 specification have limited options

to control where the errors are injected.  Your BIOS may support an

extension (enabled with the param_extension=1 module parameter, or