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authorChen Gong <gong.chen@linux.intel.com>2013-06-06 15:28:11 -0700
committerTony Luck <tony.luck@intel.com>2013-06-06 15:28:11 -0700
commitace3647afb3eca214f6da5d653ad116ff77545b6 (patch)
treea583a82d2eec6bd044064ae9d02251a455e6af29 /Documentation/acpi
parentc5a130325f13b219438cb100e2da71a3e31199f3 (diff)
downloadkernel-ace3647afb3eca214f6da5d653ad116ff77545b6.tar.gz
ACPI/APEI: Update einj documentation for param1/param2
To ensure EINJ working well when injecting errors via EINJ table, add some restrictions: param1 must be a valid physical RAM address and param2 must specify page granularity or narrower. Signed-off-by: Chen Gong <gong.chen@linux.intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'Documentation/acpi')
-rw-r--r--Documentation/acpi/apei/einj.txt9
1 files changed, 7 insertions, 2 deletions
diff --git a/Documentation/acpi/apei/einj.txt b/Documentation/acpi/apei/einj.txt
index e20b6daaced4..a58b63da1a36 100644
--- a/Documentation/acpi/apei/einj.txt
+++ b/Documentation/acpi/apei/einj.txt
@@ -47,11 +47,16 @@ directory apei/einj. The following files are provided.
- param1
This file is used to set the first error parameter value. Effect of
- parameter depends on error_type specified.
+ parameter depends on error_type specified. For example, if error
+ type is memory related type, the param1 should be a valid physical
+ memory address.
- param2
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. For example, if error
+ type is memory related type, the param2 should be a physical memory
+ address mask. Linux requires page or narrower granularity, say,
+ 0xfffffffffffff000.
- notrigger
The EINJ mechanism is a two step process. First inject the error, then