| 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. |
