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1 APEI Error INJection
2 ~~~~~~~~~~~~~~~~~~~~
3
4EINJ provides a hardware error injection mechanism
5It is very useful for debugging and testing of other APEI and RAS features.
6
7To use EINJ, make sure the following are enabled in your kernel
8configuration:
9
10CONFIG_DEBUG_FS
11CONFIG_ACPI_APEI
12CONFIG_ACPI_APEI_EINJ
13
14The user interface of EINJ is debug file system, under the
15directory apei/einj. The following files are provided.
16
17- available_error_type
18 Reading this file returns the error injection capability of the
19 platform, that is, which error types are supported. The error type
20 definition is as follow, the left field is the error type value, the
21 right field is error description.
22
23 0x00000001 Processor Correctable
24 0x00000002 Processor Uncorrectable non-fatal
25 0x00000004 Processor Uncorrectable fatal
26 0x00000008 Memory Correctable
27 0x00000010 Memory Uncorrectable non-fatal
28 0x00000020 Memory Uncorrectable fatal
29 0x00000040 PCI Express Correctable
30 0x00000080 PCI Express Uncorrectable fatal
31 0x00000100 PCI Express Uncorrectable non-fatal
32 0x00000200 Platform Correctable
33 0x00000400 Platform Uncorrectable non-fatal
34 0x00000800 Platform Uncorrectable fatal
35
36 The format of file contents are as above, except there are only the
37 available error type lines.
38
39- error_type
40 This file is used to set the error type value. The error type value
41 is defined in "available_error_type" description.
42
43- error_inject
44 Write any integer to this file to trigger the error
45 injection. Before this, please specify all necessary error
46 parameters.
47
48- param1
49 This file is used to set the first error parameter value. Effect of
50 parameter depends on error_type specified. For memory error, this is
51 physical memory address.
52
53- param2
54 This file is used to set the second error parameter value. Effect of
55 parameter depends on error_type specified. For memory error, this is
56 physical memory address mask.
57
58For more information about EINJ, please refer to ACPI specification
59version 4.0, section 17.5.