| config PSTORE | |
| tristate "Persistent store support" | |
| select CRYPTO if PSTORE_COMPRESS | |
| 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. | |
| config PSTORE_DEFLATE_COMPRESS | |
| tristate "DEFLATE (ZLIB) compression" | |
| default y | |
| depends on PSTORE | |
| select CRYPTO_DEFLATE | |
| help | |
| This option enables DEFLATE (also known as ZLIB) compression | |
| algorithm support. | |
| config PSTORE_LZO_COMPRESS | |
| tristate "LZO compression" | |
| depends on PSTORE | |
| select CRYPTO_LZO | |
| help | |
| This option enables LZO compression algorithm support. | |
| config PSTORE_LZ4_COMPRESS | |
| tristate "LZ4 compression" | |
| depends on PSTORE | |
| select CRYPTO_LZ4 | |
| help | |
| This option enables LZ4 compression algorithm support. | |
| config PSTORE_LZ4HC_COMPRESS | |
| tristate "LZ4HC compression" | |
| depends on PSTORE | |
| select CRYPTO_LZ4HC | |
| help | |
| This option enables LZ4HC (high compression) mode algorithm. | |
| config PSTORE_842_COMPRESS | |
| bool "842 compression" | |
| depends on PSTORE | |
| select CRYPTO_842 | |
| help | |
| This option enables 842 compression algorithm support. | |
| config PSTORE_ZSTD_COMPRESS | |
| bool "zstd compression" | |
| depends on PSTORE | |
| select CRYPTO_ZSTD | |
| help | |
| This option enables zstd compression algorithm support. | |
| config PSTORE_COMPRESS | |
| def_bool y | |
| depends on PSTORE | |
| depends on PSTORE_DEFLATE_COMPRESS || PSTORE_LZO_COMPRESS || \ | |
| PSTORE_LZ4_COMPRESS || PSTORE_LZ4HC_COMPRESS || \ | |
| PSTORE_842_COMPRESS || PSTORE_ZSTD_COMPRESS | |
| choice | |
| prompt "Default pstore compression algorithm" | |
| depends on PSTORE_COMPRESS | |
| help | |
| This option chooses the default active compression algorithm. | |
| This change be changed at boot with "pstore.compress=..." on | |
| the kernel command line. | |
| Currently, pstore has support for 6 compression algorithms: | |
| deflate, lzo, lz4, lz4hc, 842 and zstd. | |
| The default compression algorithm is deflate. | |
| config PSTORE_DEFLATE_COMPRESS_DEFAULT | |
| bool "deflate" if PSTORE_DEFLATE_COMPRESS | |
| config PSTORE_LZO_COMPRESS_DEFAULT | |
| bool "lzo" if PSTORE_LZO_COMPRESS | |
| config PSTORE_LZ4_COMPRESS_DEFAULT | |
| bool "lz4" if PSTORE_LZ4_COMPRESS | |
| config PSTORE_LZ4HC_COMPRESS_DEFAULT | |
| bool "lz4hc" if PSTORE_LZ4HC_COMPRESS | |
| config PSTORE_842_COMPRESS_DEFAULT | |
| bool "842" if PSTORE_842_COMPRESS | |
| config PSTORE_ZSTD_COMPRESS_DEFAULT | |
| bool "zstd" if PSTORE_ZSTD_COMPRESS | |
| endchoice | |
| config PSTORE_COMPRESS_DEFAULT | |
| string | |
| depends on PSTORE_COMPRESS | |
| default "deflate" if PSTORE_DEFLATE_COMPRESS_DEFAULT | |
| default "lzo" if PSTORE_LZO_COMPRESS_DEFAULT | |
| default "lz4" if PSTORE_LZ4_COMPRESS_DEFAULT | |
| default "lz4hc" if PSTORE_LZ4HC_COMPRESS_DEFAULT | |
| default "842" if PSTORE_842_COMPRESS_DEFAULT | |
| default "zstd" if PSTORE_ZSTD_COMPRESS_DEFAULT | |
| 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. |