| config PSTORE | |
| tristate "Persistent store support" | |
| default n | |
| help | |
| This option enables generic access to platform level | |
| persistent storage via "pstore" filesystem that can | |
| be mounted as /dev/pstore. Only useful if you have | |
| a platform level driver that registers with pstore to | |
| provide the data, so you probably should just go say "Y" | |
| (or "M") to a platform specific persistent store driver | |
| (e.g. ACPI_APEI on X86) which will select this for you. | |
| If you don't have a platform persistent store driver, | |
| say N. | |
| choice | |
| prompt "Choose compression algorithm" | |
| depends on PSTORE | |
| default PSTORE_ZLIB_COMPRESS | |
| help | |
| This option chooses compression algorithm. | |
| config PSTORE_ZLIB_COMPRESS | |
| bool "ZLIB" | |
| select ZLIB_DEFLATE | |
| select ZLIB_INFLATE | |
| help | |
| This option enables ZLIB compression algorithm support. | |
| config PSTORE_LZO_COMPRESS | |
| bool "LZO" | |
| select LZO_COMPRESS | |
| select LZO_DECOMPRESS | |
| help | |
| This option enables LZO compression algorithm support. | |
| config PSTORE_LZ4_COMPRESS | |
| bool "LZ4" | |
| select LZ4_COMPRESS | |
| select LZ4_DECOMPRESS | |
| help | |
| This option enables LZ4 compression algorithm support. | |
| endchoice | |
| config PSTORE_CONSOLE | |
| bool "Log kernel console messages" | |
| depends on PSTORE | |
| help | |
| When the option is enabled, pstore will log all kernel | |
| messages, even if no oops or panic happened. | |
| config PSTORE_PMSG | |
| bool "Log user space messages" | |
| depends on PSTORE | |
| help | |
| When the option is enabled, pstore will export a character | |
| interface /dev/pmsg0 to log user space messages. On reboot | |
| data can be retrieved from /sys/fs/pstore/pmsg-ramoops-[ID]. | |
| If unsure, say N. | |
| config PSTORE_FTRACE | |
| bool "Persistent function tracer" | |
| depends on PSTORE | |
| depends on FUNCTION_TRACER | |
| depends on DEBUG_FS | |
| help | |
| With this option kernel traces function calls into a persistent | |
| ram buffer that can be decoded and dumped after reboot through | |
| pstore filesystem. It can be used to determine what function | |
| was last called before a reset or panic. | |
| If unsure, say N. | |
| config PSTORE_RAM | |
| tristate "Log panic/oops to a RAM buffer" | |
| depends on PSTORE | |
| depends on HAS_IOMEM | |
| depends on HAVE_MEMBLOCK | |
| select REED_SOLOMON | |
| select REED_SOLOMON_ENC8 | |
| select REED_SOLOMON_DEC8 | |
| help | |
| This enables panic and oops messages to be logged to a circular | |
| buffer in RAM where it can be read back at some later point. | |
| Note that for historical reasons, the module will be named | |
| "ramoops.ko". | |
| For more information, see Documentation/admin-guide/ramoops.rst. |