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authorChen Gong <gong.chen@linux.intel.com>2012-03-15 16:53:37 +0800
committerLen Brown <len.brown@intel.com>2012-03-30 03:30:19 -0400
commit6ef19ab7fa1535d35006535dba6c407dad2d845c (patch)
treeebc8d0a9341ac4cfd5970b0eacf45e548a31a0eb /Documentation
parentee49089dc7d9fc78db51e18f4fba68e88edc49a4 (diff)
downloadkernel-6ef19ab7fa1535d35006535dba6c407dad2d845c.tar.gz
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: Tony Luck <tony.luck@intel.com> Signed-off-by: Chen Gong <gong.chen@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/acpi/apei/einj.txt8
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/acpi/apei/einj.txt b/Documentation/acpi/apei/einj.txt
index e7cc36397217..e20b6daaced4 100644
--- a/Documentation/acpi/apei/einj.txt
+++ b/Documentation/acpi/apei/einj.txt
@@ -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