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| author | Huang Ying <ying.huang@intel.com> | 2010-05-18 10:35:15 +0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2010-05-20 06:39:49 +0400 |
| commit | ea8c071cad789b1919355fc7a67182a5c9994e6b (patch) | |
| tree | 7466051607ba419340a70f6b9a7af6fdb55ef193 /Documentation/acpi/apei/einj.txt | |
| parent | e40213450b53157967a1f83eda50e9a941c13a08 (diff) | |
| download | linux-ea8c071cad789b1919355fc7a67182a5c9994e6b.tar.xz | |
ACPI, APEI, Document for APEI
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>
Diffstat (limited to 'Documentation/acpi/apei/einj.txt')
| -rw-r--r-- | Documentation/acpi/apei/einj.txt | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/Documentation/acpi/apei/einj.txt b/Documentation/acpi/apei/einj.txt new file mode 100644 index 000000000000..838b7f0d5e11 --- /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. |