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einj.txt

einj.txt 2.4 KB
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  1. 			APEI Error INJection
    2. 

  2. 			~~~~~~~~~~~~~~~~~~~~
    3. 

  3. 

  4. EINJ provides a hardware error injection mechanism
    5. 

  5. It is very useful for debugging and testing of other APEI and RAS features.
    6. 

  6. 

  7. To use EINJ, make sure the following are enabled in your kernel
    8. 

  8. configuration:
    9. 

  9. 

  10. CONFIG_DEBUG_FS
    11. 

  11. CONFIG_ACPI_APEI
    12. 

  12. CONFIG_ACPI_APEI_EINJ
    13. 

  13. 

  14. The user interface of EINJ is debug file system, under the
    15. 

  15. directory apei/einj. The following files are provided.
    16. 

  16. 

  17. - available_error_type
    18. 

  18.   Reading this file returns the error injection capability of the
    19. 

  19.   platform, that is, which error types are supported. The error type
    20. 

  20.   definition is as follow, the left field is the error type value, the
    21. 

  21.   right field is error description.
    22. 

  22. 

  23.     0x00000001	Processor Correctable
    24. 

  24.     0x00000002	Processor Uncorrectable non-fatal
    25. 

  25.     0x00000004	Processor Uncorrectable fatal
    26. 

  26.     0x00000008  Memory Correctable
    27. 

  27.     0x00000010  Memory Uncorrectable non-fatal
    28. 

  28.     0x00000020  Memory Uncorrectable fatal
    29. 

  29.     0x00000040	PCI Express Correctable
    30. 

  30.     0x00000080	PCI Express Uncorrectable fatal
    31. 

  31.     0x00000100	PCI Express Uncorrectable non-fatal
    32. 

  32.     0x00000200	Platform Correctable
    33. 

  33.     0x00000400	Platform Uncorrectable non-fatal
    34. 

  34.     0x00000800	Platform Uncorrectable fatal
    35. 

  35. 

  36.   The format of file contents are as above, except there are only the
    37. 

  37.   available error type lines.
    38. 

  38. 

  39. - error_type
    40. 

  40.   This file is used to set the error type value. The error type value
    41. 

  41.   is defined in "available_error_type" description.
    42. 

  42. 

  43. - error_inject
    44. 

  44.   Write any integer to this file to trigger the error
    45. 

  45.   injection. Before this, please specify all necessary error
    46. 

  46.   parameters.
    47. 

  47. 

  48. - param1
    49. 

  49.   This file is used to set the first error parameter value. Effect of
    50. 

  50.   parameter depends on error_type specified. For memory error, this is
    51. 

  51.   physical memory address.  Only available if param_extension module
    52. 

  52.   parameter is specified.
    53. 

  53. 

  54. - param2
    55. 

  55.   This file is used to set the second error parameter value. Effect of
    56. 

  56.   parameter depends on error_type specified. For memory error, this is
    57. 

  57.   physical memory address mask.  Only available if param_extension
    58. 

  58.   module parameter is specified.
    59. 

  59. 

  60. Injecting parameter support is a BIOS version specific extension, that
    61. 

  61. is, it only works on some BIOS version.  If you want to use it, please
    62. 

  62. make sure your BIOS version has the proper support and specify
    63. 

  63. "param_extension=y" in module parameter.
    64. 

  64. 

  65. For more information about EINJ, please refer to ACPI specification
    66. 

  66. version 4.0, section 17.5.
    67.