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

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
...@@ -53,6 +53,14 @@ directory apei/einj. The following files are provided. ...@@ -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 This file is used to set the second error parameter value. Effect of
parameter depends on error_type specified. 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 BIOS versions based in the ACPI 4.0 specification have limited options
to control where the errors are injected. Your BIOS may support an to control where the errors are injected. Your BIOS may support an
extension (enabled with the param_extension=1 module parameter, or extension (enabled with the param_extension=1 module parameter, or
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