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273 lines
8.3 KiB
273 lines
8.3 KiB
# 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_DEFAULT_KMSG_BYTES |
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int "Default kernel log storage space" if EXPERT |
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depends on PSTORE |
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default "10240" |
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help |
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Defines default size of pstore kernel log storage. |
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Can be enlarged if needed, not recommended to shrink it. |
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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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config PSTORE_ZONE |
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tristate |
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depends on PSTORE |
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help |
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The common layer for pstore/blk (and pstore/ram in the future) |
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to manage storage in zones. |
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config PSTORE_BLK |
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tristate "Log panic/oops to a block device" |
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depends on PSTORE |
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depends on BLOCK |
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depends on BROKEN |
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select PSTORE_ZONE |
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default n |
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help |
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This enables panic and oops message to be logged to a block dev |
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where it can be read back at some later point. |
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For more information, see Documentation/admin-guide/pstore-blk.rst |
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If unsure, say N. |
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config PSTORE_BLK_BLKDEV |
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string "block device identifier" |
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depends on PSTORE_BLK |
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default "" |
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help |
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Which block device should be used for pstore/blk. |
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It accepts the following variants: |
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1) <hex_major><hex_minor> device number in hexadecimal representation, |
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with no leading 0x, for example b302. |
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2) /dev/<disk_name> represents the device name of disk |
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3) /dev/<disk_name><decimal> represents the device name and number |
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of partition - device number of disk plus the partition number |
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4) /dev/<disk_name>p<decimal> - same as the above, this form is |
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used when disk name of partitioned disk ends with a digit. |
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5) PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF representing the |
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unique id of a partition if the partition table provides it. |
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The UUID may be either an EFI/GPT UUID, or refer to an MSDOS |
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partition using the format SSSSSSSS-PP, where SSSSSSSS is a zero- |
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filled hex representation of the 32-bit "NT disk signature", and PP |
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is a zero-filled hex representation of the 1-based partition number. |
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6) PARTUUID=<UUID>/PARTNROFF=<int> to select a partition in relation |
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to a partition with a known unique id. |
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7) <major>:<minor> major and minor number of the device separated by |
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a colon. |
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NOTE that, both Kconfig and module parameters can configure |
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pstore/blk, but module parameters have priority over Kconfig. |
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config PSTORE_BLK_KMSG_SIZE |
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int "Size in Kbytes of kmsg dump log to store" |
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depends on PSTORE_BLK |
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default 64 |
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help |
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This just sets size of kmsg dump (oops, panic, etc) log for |
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pstore/blk. The size is in KB and must be a multiple of 4. |
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NOTE that, both Kconfig and module parameters can configure |
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pstore/blk, but module parameters have priority over Kconfig. |
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config PSTORE_BLK_MAX_REASON |
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int "Maximum kmsg dump reason to store" |
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depends on PSTORE_BLK |
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default 2 |
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help |
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The maximum reason for kmsg dumps to store. The default is |
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2 (KMSG_DUMP_OOPS), see include/linux/kmsg_dump.h's |
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enum kmsg_dump_reason for more details. |
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NOTE that, both Kconfig and module parameters can configure |
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pstore/blk, but module parameters have priority over Kconfig. |
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config PSTORE_BLK_PMSG_SIZE |
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int "Size in Kbytes of pmsg to store" |
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depends on PSTORE_BLK |
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depends on PSTORE_PMSG |
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default 64 |
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help |
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This just sets size of pmsg (pmsg_size) for pstore/blk. The size is |
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in KB and must be a multiple of 4. |
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NOTE that, both Kconfig and module parameters can configure |
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pstore/blk, but module parameters have priority over Kconfig. |
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config PSTORE_BLK_CONSOLE_SIZE |
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int "Size in Kbytes of console log to store" |
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depends on PSTORE_BLK |
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depends on PSTORE_CONSOLE |
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default 64 |
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help |
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This just sets size of console log (console_size) to store via |
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pstore/blk. The size is in KB and must be a multiple of 4. |
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NOTE that, both Kconfig and module parameters can configure |
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pstore/blk, but module parameters have priority over Kconfig. |
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config PSTORE_BLK_FTRACE_SIZE |
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int "Size in Kbytes of ftrace log to store" |
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depends on PSTORE_BLK |
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depends on PSTORE_FTRACE |
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default 64 |
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help |
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This just sets size of ftrace log (ftrace_size) for pstore/blk. The |
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size is in KB and must be a multiple of 4. |
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NOTE that, both Kconfig and module parameters can configure |
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pstore/blk, but module parameters have priority over Kconfig.
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