Add document for APEI, including kernel parameters and EINJ debug file
sytem interface.
Signed-off-by: Huang Ying <ying.huang@xxxxxxxxx>
---
Documentation/acpi/apei/einj.txt | 49 ++++++++++++++++++++++++++++++++++++
Documentation/kernel-parameters.txt | 5 +++
2 files changed, 54 insertions(+)
create mode 100644 Documentation/acpi/apei/einj.txt
--- /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 the following is enabled in your kernel
+configuration:
+
+CONFIG_DEBUG_FS
+CONFIG_ACPI_APEI
+CONFIG_ACPI_APEI_EINJ
+
+The user interface of EINJ is in debug file system, under the
+directory apei/einj. The following files are provided.
+
+- available_error_type
+ Read this file will return 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.
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -338,6 +338,11 @@ and is between 256 and 4096 characters.
not play well with APC CPU idle - disable it if you have
APC and your system crashes randomly.
+ apei.hest_disable= [ACPI]
+ Disable Hardware Error Source Table (HEST) support,
+ corresponding firmware-first mode error processing
+ logic will be disabled.
+
apic= [APIC,X86-32] Advanced Programmable Interrupt Controller
Change the output verbosity whilst booting
Format: { quiet (default) | verbose | debug }
--
To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
