blob: 360ae43f590cccf24630f4b5676ebf5f00ebca0b [file] [log] [blame]
Tony Luckca01d6d2010-12-28 14:25:21 -08001config PSTORE
Geliang Tangee1d2672015-10-20 00:39:03 -07002 tristate "Persistent store support"
Tony Luckca01d6d2010-12-28 14:25:21 -08003 default n
Aruna Balakrishnaiah90ce4ca2013-08-16 13:52:57 -07004 select ZLIB_DEFLATE
5 select ZLIB_INFLATE
Tony Luckca01d6d2010-12-28 14:25:21 -08006 help
7 This option enables generic access to platform level
8 persistent storage via "pstore" filesystem that can
9 be mounted as /dev/pstore. Only useful if you have
10 a platform level driver that registers with pstore to
11 provide the data, so you probably should just go say "Y"
12 (or "M") to a platform specific persistent store driver
13 (e.g. ACPI_APEI on X86) which will select this for you.
14 If you don't have a platform persistent store driver,
15 say N.
Anton Vorontsov1894a252012-05-16 05:43:08 -070016
Anton Vorontsovf29e5952012-05-26 06:20:19 -070017config PSTORE_CONSOLE
18 bool "Log kernel console messages"
19 depends on PSTORE
20 help
21 When the option is enabled, pstore will log all kernel
22 messages, even if no oops or panic happened.
23
Mark Salyzyn9d5438f2015-01-16 16:01:10 -080024config PSTORE_PMSG
25 bool "Log user space messages"
26 depends on PSTORE
27 help
28 When the option is enabled, pstore will export a character
29 interface /dev/pmsg0 to log user space messages. On reboot
30 data can be retrieved from /sys/fs/pstore/pmsg-ramoops-[ID].
31
32 If unsure, say N.
33
Anton Vorontsov060287b2012-07-09 17:10:41 -070034config PSTORE_FTRACE
35 bool "Persistent function tracer"
36 depends on PSTORE
37 depends on FUNCTION_TRACER
Anton Vorontsov65f8c952012-07-17 14:26:15 -070038 depends on DEBUG_FS
Anton Vorontsov060287b2012-07-09 17:10:41 -070039 help
40 With this option kernel traces function calls into a persistent
41 ram buffer that can be decoded and dumped after reboot through
42 pstore filesystem. It can be used to determine what function
43 was last called before a reset or panic.
44
45 If unsure, say N.
46
Anton Vorontsov1894a252012-05-16 05:43:08 -070047config PSTORE_RAM
48 tristate "Log panic/oops to a RAM buffer"
Anton Vorontsov1894a252012-05-16 05:43:08 -070049 depends on PSTORE
Anton Vorontsovcddb8752012-05-17 00:15:08 -070050 depends on HAS_IOMEM
51 depends on HAVE_MEMBLOCK
52 select REED_SOLOMON
53 select REED_SOLOMON_ENC8
54 select REED_SOLOMON_DEC8
Anton Vorontsov1894a252012-05-16 05:43:08 -070055 help
56 This enables panic and oops messages to be logged to a circular
57 buffer in RAM where it can be read back at some later point.
58
59 Note that for historical reasons, the module will be named
60 "ramoops.ko".
61
62 For more information, see Documentation/ramoops.txt.