fs/pstore/Kconfig

   1 config PSTORE
   2         tristate "Persistent store support"
   3         default n
   4         help
   5            This option enables generic access to platform level
   6            persistent storage via "pstore" filesystem that can
   7            be mounted as /dev/pstore.  Only useful if you have
   8            a platform level driver that registers with pstore to
   9            provide the data, so you probably should just go say "Y"
  10            (or "M") to a platform specific persistent store driver
  11            (e.g. ACPI_APEI on X86) which will select this for you.
  12            If you don't have a platform persistent store driver,
  13            say N.
  14
  15 choice
  16         prompt "Choose compression algorithm"
  17         depends on PSTORE
  18         default PSTORE_ZLIB_COMPRESS
  19         help
  20           This option chooses compression algorithm.
  21
  22 config PSTORE_ZLIB_COMPRESS
  23         bool "ZLIB"
  24         select ZLIB_DEFLATE
  25         select ZLIB_INFLATE
  26         help
  27           This option enables ZLIB compression algorithm support.
  28
  29 config PSTORE_LZO_COMPRESS
  30         bool "LZO"
  31         select LZO_COMPRESS
  32         select LZO_DECOMPRESS
  33         help
  34           This option enables LZO compression algorithm support.
  35
  36 config PSTORE_LZ4_COMPRESS
  37         bool "LZ4"
  38         select LZ4_COMPRESS
  39         select LZ4_DECOMPRESS
  40         help
  41           This option enables LZ4 compression algorithm support.
  42 endchoice
  43
  44 config PSTORE_CONSOLE
  45         bool "Log kernel console messages"
  46         depends on PSTORE
  47         help
  48           When the option is enabled, pstore will log all kernel
  49           messages, even if no oops or panic happened.
  50
  51 config PSTORE_PMSG
  52         bool "Log user space messages"
  53         depends on PSTORE
  54         help
  55           When the option is enabled, pstore will export a character
  56           interface /dev/pmsg0 to log user space messages. On reboot
  57           data can be retrieved from /sys/fs/pstore/pmsg-ramoops-[ID].
  58
  59           If unsure, say N.
  60
  61 config PSTORE_FTRACE
  62         bool "Persistent function tracer"
  63         depends on PSTORE
  64         depends on FUNCTION_TRACER
  65         depends on DEBUG_FS
  66         help
  67           With this option kernel traces function calls into a persistent
  68           ram buffer that can be decoded and dumped after reboot through
  69           pstore filesystem. It can be used to determine what function
  70           was last called before a reset or panic.
  71
  72           If unsure, say N.
  73
  74 config PSTORE_RAM
  75         tristate "Log panic/oops to a RAM buffer"
  76         depends on PSTORE
  77         depends on HAS_IOMEM
  78         depends on HAVE_MEMBLOCK
  79         select REED_SOLOMON
  80         select REED_SOLOMON_ENC8
  81         select REED_SOLOMON_DEC8
  82         help
  83           This enables panic and oops messages to be logged to a circular
  84           buffer in RAM where it can be read back at some later point.
  85
  86           Note that for historical reasons, the module will be named
  87           "ramoops.ko".
  88
  89           For more information, see Documentation/admin-guide/ramoops.rst.