1 What: /sys/firmware/opal/elog
2 Date: Feb 2014
3 Contact: Stewart Smith <stewart@linux.vn
4 Description:
5 This directory exposes error l
6 through the OPAL firmware inte
7
8 Each error log is identified b
9 exist until explicitly acknowl
10
11 Each log entry has a directory
12
13 Log entries may be purged by t
14 before retrieved by firmware o
15 Linux if there is no room for
16
17 In the event that Linux has re
18 but not explicitly acknowledge
19 the service processor needs mo
20 the only remaining copy of a l
21 Linux.
22
23 Typically, a user space daemon
24 entries, read them out and ack
25
26 The service processor may be a
27 entries than firmware can, so
28 an event from Linux you may in
29 from the queue that was genera
30
31 The raw log format is a binary
32 do not parse this at all in ke
33 user space to solve the proble
34 do more parsing in kernel and
35 it easier for simple user spac
36 more information.
37
38 For each log entry (directory)
39 files:
40
41 ============== ==============
42 id: An ASCII repre
43 error log, in
44
45 type: An ASCII repre
46 description of
47 Currently just
48 In the future
49
50 raw: A read-only bi
51 to get the raw
52 <16kb, often j
53 "average" 2kb.
54
55 acknowledge: Writing 'ack'
56 the error log
57 the service pr
58 Shortly after
59 entry will be
60 Reading this f
61 operations (cu
62 ============== ==============
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