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ACPI, APEI, Document for APEI
authorHuang Ying <ying.huang@intel.com>
Tue, 18 May 2010 06:35:15 +0000 (14:35 +0800)
committerLen Brown <len.brown@intel.com>
Thu, 20 May 2010 02:39:49 +0000 (22:39 -0400)
Add document for APEI, including kernel parameters and EINJ debug file
sytem interface.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Documentation/acpi/apei/einj.txt [new file with mode: 0644] patch | blob
Documentation/kernel-parameters.txt patch | blob | history

diff --git a/Documentation/acpi/apei/einj.txt b/Documentation/acpi/apei/einj.txt
new file mode 100644 (file)
index 0000000..838b7f0
--- /dev/null
+++ b/Documentation/acpi/apei/einj.txt
@@ -0,0 +1,49 @@
+                       APEI Error INJection
+                       ~~~~~~~~~~~~~~~~~~~~
+
+EINJ provides a hardware error injection mechanism
+It is very useful for debugging and testing of other APEI and RAS features.
+
+To use EINJ, make sure the following are enabled in your kernel
+configuration:
+
+CONFIG_DEBUG_FS
+CONFIG_ACPI_APEI
+CONFIG_ACPI_APEI_EINJ
+
+The user interface of EINJ is debug file system, under the
+directory apei/einj. The following files are provided.
+
+- available_error_type
+  Reading this file returns the error injection capability of the
+  platform, that is, which error types are supported. The error type
+  definition is as follow, the left field is the error type value, the
+  right field is error description.
+
+    0x00000001 Processor Correctable
+    0x00000002 Processor Uncorrectable non-fatal
+    0x00000004 Processor Uncorrectable fatal
+    0x00000008  Memory Correctable
+    0x00000010  Memory Uncorrectable non-fatal
+    0x00000020  Memory Uncorrectable fatal
+    0x00000040 PCI Express Correctable
+    0x00000080 PCI Express Uncorrectable fatal
+    0x00000100 PCI Express Uncorrectable non-fatal
+    0x00000200 Platform Correctable
+    0x00000400 Platform Uncorrectable non-fatal
+    0x00000800 Platform Uncorrectable fatal
+
+  The format of file contents are as above, except there are only the
+  available error type lines.
+
+- error_type
+  This file is used to set the error type value. The error type value
+  is defined in "available_error_type" description.
+
+- error_inject
+  Write any integer to this file to trigger the error
+  injection. Before this, please specify all necessary error
+  parameters.
+
+For more information about EINJ, please refer to ACPI specification
+version 4.0, section 17.5.
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 839b21b..47a0e1b 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -843,6 +843,11 @@ and is between 256 and 4096 characters. It is defined in the file
        hd=             [EIDE] (E)IDE hard drive subsystem geometry
                        Format: <cyl>,<head>,<sect>
 
+       hest_disable    [ACPI]
+                       Disable Hardware Error Source Table (HEST) support;
+                       corresponding firmware-first mode error processing
+                       logic will be disabled.
+
        highmem=nn[KMG] [KNL,BOOT] forces the highmem zone to have an exact
                        size of <nn>. This works even on boxes that have no
                        highmem otherwise. This also works to reduce highmem
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