156 lines
4.3 KiB
Plaintext
156 lines
4.3 KiB
Plaintext
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# SPDX-License-Identifier: GPL-2.0-only
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config PSTORE
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tristate "Persistent store support"
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select CRYPTO if PSTORE_COMPRESS
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default n
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help
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This option enables generic access to platform level
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persistent storage via "pstore" filesystem that can
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be mounted as /dev/pstore. Only useful if you have
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a platform level driver that registers with pstore to
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provide the data, so you probably should just go say "Y"
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(or "M") to a platform specific persistent store driver
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(e.g. ACPI_APEI on X86) which will select this for you.
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If you don't have a platform persistent store driver,
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say N.
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config PSTORE_DEFLATE_COMPRESS
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tristate "DEFLATE (ZLIB) compression"
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default y
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depends on PSTORE
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select CRYPTO_DEFLATE
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help
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This option enables DEFLATE (also known as ZLIB) compression
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algorithm support.
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config PSTORE_LZO_COMPRESS
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tristate "LZO compression"
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depends on PSTORE
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select CRYPTO_LZO
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help
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This option enables LZO compression algorithm support.
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config PSTORE_LZ4_COMPRESS
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tristate "LZ4 compression"
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depends on PSTORE
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select CRYPTO_LZ4
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help
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This option enables LZ4 compression algorithm support.
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config PSTORE_LZ4HC_COMPRESS
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tristate "LZ4HC compression"
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depends on PSTORE
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select CRYPTO_LZ4HC
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help
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This option enables LZ4HC (high compression) mode algorithm.
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config PSTORE_842_COMPRESS
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bool "842 compression"
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depends on PSTORE
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select CRYPTO_842
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help
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This option enables 842 compression algorithm support.
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config PSTORE_ZSTD_COMPRESS
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bool "zstd compression"
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depends on PSTORE
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select CRYPTO_ZSTD
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help
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This option enables zstd compression algorithm support.
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config PSTORE_COMPRESS
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def_bool y
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depends on PSTORE
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depends on PSTORE_DEFLATE_COMPRESS || PSTORE_LZO_COMPRESS || \
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PSTORE_LZ4_COMPRESS || PSTORE_LZ4HC_COMPRESS || \
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PSTORE_842_COMPRESS || PSTORE_ZSTD_COMPRESS
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choice
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prompt "Default pstore compression algorithm"
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depends on PSTORE_COMPRESS
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help
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This option chooses the default active compression algorithm.
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This change be changed at boot with "pstore.compress=..." on
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the kernel command line.
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Currently, pstore has support for 6 compression algorithms:
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deflate, lzo, lz4, lz4hc, 842 and zstd.
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The default compression algorithm is deflate.
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config PSTORE_DEFLATE_COMPRESS_DEFAULT
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bool "deflate" if PSTORE_DEFLATE_COMPRESS
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config PSTORE_LZO_COMPRESS_DEFAULT
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bool "lzo" if PSTORE_LZO_COMPRESS
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config PSTORE_LZ4_COMPRESS_DEFAULT
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bool "lz4" if PSTORE_LZ4_COMPRESS
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config PSTORE_LZ4HC_COMPRESS_DEFAULT
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bool "lz4hc" if PSTORE_LZ4HC_COMPRESS
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config PSTORE_842_COMPRESS_DEFAULT
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bool "842" if PSTORE_842_COMPRESS
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config PSTORE_ZSTD_COMPRESS_DEFAULT
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bool "zstd" if PSTORE_ZSTD_COMPRESS
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endchoice
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config PSTORE_COMPRESS_DEFAULT
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string
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depends on PSTORE_COMPRESS
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default "deflate" if PSTORE_DEFLATE_COMPRESS_DEFAULT
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default "lzo" if PSTORE_LZO_COMPRESS_DEFAULT
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default "lz4" if PSTORE_LZ4_COMPRESS_DEFAULT
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default "lz4hc" if PSTORE_LZ4HC_COMPRESS_DEFAULT
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default "842" if PSTORE_842_COMPRESS_DEFAULT
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default "zstd" if PSTORE_ZSTD_COMPRESS_DEFAULT
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config PSTORE_CONSOLE
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bool "Log kernel console messages"
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depends on PSTORE
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help
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When the option is enabled, pstore will log all kernel
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messages, even if no oops or panic happened.
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config PSTORE_PMSG
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bool "Log user space messages"
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depends on PSTORE
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help
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When the option is enabled, pstore will export a character
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interface /dev/pmsg0 to log user space messages. On reboot
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data can be retrieved from /sys/fs/pstore/pmsg-ramoops-[ID].
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If unsure, say N.
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config PSTORE_FTRACE
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bool "Persistent function tracer"
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depends on PSTORE
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depends on FUNCTION_TRACER
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depends on DEBUG_FS
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help
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With this option kernel traces function calls into a persistent
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ram buffer that can be decoded and dumped after reboot through
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pstore filesystem. It can be used to determine what function
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was last called before a reset or panic.
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If unsure, say N.
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config PSTORE_RAM
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tristate "Log panic/oops to a RAM buffer"
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depends on PSTORE
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depends on HAS_IOMEM
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select REED_SOLOMON
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select REED_SOLOMON_ENC8
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select REED_SOLOMON_DEC8
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help
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This enables panic and oops messages to be logged to a circular
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buffer in RAM where it can be read back at some later point.
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Note that for historical reasons, the module will be named
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"ramoops.ko".
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For more information, see Documentation/admin-guide/ramoops.rst.
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