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TOMOYO Linux Cross Reference
Linux/fs/pstore/Kconfig

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Diff markup

Differences between /fs/pstore/Kconfig (Architecture mips) and /fs/pstore/Kconfig (Architecture ppc)


  1 # SPDX-License-Identifier: GPL-2.0-only             1 # SPDX-License-Identifier: GPL-2.0-only
  2 config PSTORE                                       2 config PSTORE
  3         tristate "Persistent store support"         3         tristate "Persistent store support"
  4         default n                                   4         default n
  5         help                                        5         help
  6            This option enables generic access       6            This option enables generic access to platform level
  7            persistent storage via "pstore" fil      7            persistent storage via "pstore" filesystem that can
  8            be mounted as /dev/pstore.  Only us      8            be mounted as /dev/pstore.  Only useful if you have
  9            a platform level driver that regist      9            a platform level driver that registers with pstore to
 10            provide the data, so you probably s     10            provide the data, so you probably should just go say "Y"
 11            (or "M") to a platform specific per     11            (or "M") to a platform specific persistent store driver
 12            (e.g. ACPI_APEI on X86) which will      12            (e.g. ACPI_APEI on X86) which will select this for you.
 13            If you don't have a platform persis     13            If you don't have a platform persistent store driver,
 14            say N.                                  14            say N.
 15                                                    15 
 16 config PSTORE_DEFAULT_KMSG_BYTES                   16 config PSTORE_DEFAULT_KMSG_BYTES
 17         int "Default kernel log storage space"     17         int "Default kernel log storage space" if EXPERT
 18         depends on PSTORE                          18         depends on PSTORE
 19         default "10240"                            19         default "10240"
 20         help                                       20         help
 21           Defines default size of pstore kerne     21           Defines default size of pstore kernel log storage.
 22           Can be enlarged if needed, not recom     22           Can be enlarged if needed, not recommended to shrink it.
 23                                                    23 
 24 config PSTORE_COMPRESS                             24 config PSTORE_COMPRESS
 25         bool "Pstore compression (deflate)"        25         bool "Pstore compression (deflate)"
 26         depends on PSTORE                          26         depends on PSTORE
 27         select ZLIB_INFLATE                        27         select ZLIB_INFLATE
 28         select ZLIB_DEFLATE                        28         select ZLIB_DEFLATE
 29         default y                                  29         default y
 30         help                                       30         help
 31           Whether pstore records should be com     31           Whether pstore records should be compressed before being written to
 32           the backing store. This is implement     32           the backing store. This is implemented using the zlib 'deflate'
 33           algorithm, using the library impleme     33           algorithm, using the library implementation instead of using the full
 34           blown crypto API. This reduces the r     34           blown crypto API. This reduces the risk of secondary oopses or other
 35           problems while pstore is recording p     35           problems while pstore is recording panic metadata.
 36                                                    36 
 37 config PSTORE_CONSOLE                              37 config PSTORE_CONSOLE
 38         bool "Log kernel console messages"         38         bool "Log kernel console messages"
 39         depends on PSTORE                          39         depends on PSTORE
 40         help                                       40         help
 41           When the option is enabled, pstore w     41           When the option is enabled, pstore will log all kernel
 42           messages, even if no oops or panic h     42           messages, even if no oops or panic happened.
 43                                                    43 
 44 config PSTORE_PMSG                                 44 config PSTORE_PMSG
 45         bool "Log user space messages"             45         bool "Log user space messages"
 46         depends on PSTORE                          46         depends on PSTORE
 47         select RT_MUTEXES                          47         select RT_MUTEXES
 48         help                                       48         help
 49           When the option is enabled, pstore w     49           When the option is enabled, pstore will export a character
 50           interface /dev/pmsg0 to log user spa     50           interface /dev/pmsg0 to log user space messages. On reboot
 51           data can be retrieved from /sys/fs/p     51           data can be retrieved from /sys/fs/pstore/pmsg-ramoops-[ID].
 52                                                    52 
 53           If unsure, say N.                        53           If unsure, say N.
 54                                                    54 
 55 config PSTORE_FTRACE                               55 config PSTORE_FTRACE
 56         bool "Persistent function tracer"          56         bool "Persistent function tracer"
 57         depends on PSTORE                          57         depends on PSTORE
 58         depends on FUNCTION_TRACER                 58         depends on FUNCTION_TRACER
 59         depends on DEBUG_FS                        59         depends on DEBUG_FS
 60         help                                       60         help
 61           With this option kernel traces funct     61           With this option kernel traces function calls into a persistent
 62           ram buffer that can be decoded and d     62           ram buffer that can be decoded and dumped after reboot through
 63           pstore filesystem. It can be used to     63           pstore filesystem. It can be used to determine what function
 64           was last called before a reset or pa     64           was last called before a reset or panic.
 65                                                    65 
 66           If unsure, say N.                        66           If unsure, say N.
 67                                                    67 
 68 config PSTORE_RAM                                  68 config PSTORE_RAM
 69         tristate "Log panic/oops to a RAM buff     69         tristate "Log panic/oops to a RAM buffer"
 70         depends on PSTORE                          70         depends on PSTORE
 71         depends on HAS_IOMEM                       71         depends on HAS_IOMEM
 72         select REED_SOLOMON                        72         select REED_SOLOMON
 73         select REED_SOLOMON_ENC8                   73         select REED_SOLOMON_ENC8
 74         select REED_SOLOMON_DEC8                   74         select REED_SOLOMON_DEC8
 75         help                                       75         help
 76           This enables panic and oops messages     76           This enables panic and oops messages to be logged to a circular
 77           buffer in RAM where it can be read b     77           buffer in RAM where it can be read back at some later point.
 78                                                    78 
 79           Note that for historical reasons, th     79           Note that for historical reasons, the module will be named
 80           "ramoops.ko".                            80           "ramoops.ko".
 81                                                    81 
 82           For more information, see Documentat     82           For more information, see Documentation/admin-guide/ramoops.rst.
 83                                                    83 
 84 config PSTORE_ZONE                                 84 config PSTORE_ZONE
 85         tristate                                   85         tristate
 86         depends on PSTORE                          86         depends on PSTORE
 87         help                                       87         help
 88           The common layer for pstore/blk (and     88           The common layer for pstore/blk (and pstore/ram in the future)
 89           to manage storage in zones.              89           to manage storage in zones.
 90                                                    90 
 91 config PSTORE_BLK                                  91 config PSTORE_BLK
 92         tristate "Log panic/oops to a block de     92         tristate "Log panic/oops to a block device"
 93         depends on PSTORE                          93         depends on PSTORE
 94         depends on BLOCK                           94         depends on BLOCK
 95         select PSTORE_ZONE                         95         select PSTORE_ZONE
 96         default n                                  96         default n
 97         help                                       97         help
 98           This enables panic and oops message      98           This enables panic and oops message to be logged to a block dev
 99           where it can be read back at some la     99           where it can be read back at some later point.
100                                                   100 
101           For more information, see Documentat    101           For more information, see Documentation/admin-guide/pstore-blk.rst
102                                                   102 
103           If unsure, say N.                       103           If unsure, say N.
104                                                   104 
105 config PSTORE_BLK_BLKDEV                          105 config PSTORE_BLK_BLKDEV
106         string "block device identifier"          106         string "block device identifier"
107         depends on PSTORE_BLK                     107         depends on PSTORE_BLK
108         default ""                                108         default ""
109         help                                      109         help
110           Which block device should be used fo    110           Which block device should be used for pstore/blk.
111                                                   111 
112           It accepts the following variants:      112           It accepts the following variants:
113           1) <hex_major><hex_minor> device num    113           1) <hex_major><hex_minor> device number in hexadecimal representation,
114              with no leading 0x, for example b    114              with no leading 0x, for example b302.
115           2) /dev/<disk_name> represents the d    115           2) /dev/<disk_name> represents the device name of disk
116           3) /dev/<disk_name><decimal> represe    116           3) /dev/<disk_name><decimal> represents the device name and number
117              of partition - device number of d    117              of partition - device number of disk plus the partition number
118           4) /dev/<disk_name>p<decimal> - same    118           4) /dev/<disk_name>p<decimal> - same as the above, this form is
119              used when disk name of partitione    119              used when disk name of partitioned disk ends with a digit.
120           5) PARTUUID=00112233-4455-6677-8899-    120           5) PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF representing the
121              unique id of a partition if the p    121              unique id of a partition if the partition table provides it.
122              The UUID may be either an EFI/GPT    122              The UUID may be either an EFI/GPT UUID, or refer to an MSDOS
123              partition using the format SSSSSS    123              partition using the format SSSSSSSS-PP, where SSSSSSSS is a zero-
124              filled hex representation of the     124              filled hex representation of the 32-bit "NT disk signature", and PP
125              is a zero-filled hex representati    125              is a zero-filled hex representation of the 1-based partition number.
126           6) PARTUUID=<UUID>/PARTNROFF=<int> t    126           6) PARTUUID=<UUID>/PARTNROFF=<int> to select a partition in relation
127              to a partition with a known uniqu    127              to a partition with a known unique id.
128           7) <major>:<minor> major and minor n    128           7) <major>:<minor> major and minor number of the device separated by
129              a colon.                             129              a colon.
130                                                   130 
131           NOTE that, both Kconfig and module p    131           NOTE that, both Kconfig and module parameters can configure
132           pstore/blk, but module parameters ha    132           pstore/blk, but module parameters have priority over Kconfig.
133                                                   133 
134 config PSTORE_BLK_KMSG_SIZE                       134 config PSTORE_BLK_KMSG_SIZE
135         int "Size in Kbytes of kmsg dump log t    135         int "Size in Kbytes of kmsg dump log to store"
136         depends on PSTORE_BLK                     136         depends on PSTORE_BLK
137         default 64                                137         default 64
138         help                                      138         help
139           This just sets size of kmsg dump (oo    139           This just sets size of kmsg dump (oops, panic, etc) log for
140           pstore/blk. The size is in KB and mu    140           pstore/blk. The size is in KB and must be a multiple of 4.
141                                                   141 
142           NOTE that, both Kconfig and module p    142           NOTE that, both Kconfig and module parameters can configure
143           pstore/blk, but module parameters ha    143           pstore/blk, but module parameters have priority over Kconfig.
144                                                   144 
145 config PSTORE_BLK_MAX_REASON                      145 config PSTORE_BLK_MAX_REASON
146         int "Maximum kmsg dump reason to store    146         int "Maximum kmsg dump reason to store"
147         depends on PSTORE_BLK                     147         depends on PSTORE_BLK
148         default 2                                 148         default 2
149         help                                      149         help
150           The maximum reason for kmsg dumps to    150           The maximum reason for kmsg dumps to store. The default is
151           2 (KMSG_DUMP_OOPS), see include/linu    151           2 (KMSG_DUMP_OOPS), see include/linux/kmsg_dump.h's
152           enum kmsg_dump_reason for more detai    152           enum kmsg_dump_reason for more details.
153                                                   153 
154           NOTE that, both Kconfig and module p    154           NOTE that, both Kconfig and module parameters can configure
155           pstore/blk, but module parameters ha    155           pstore/blk, but module parameters have priority over Kconfig.
156                                                   156 
157 config PSTORE_BLK_PMSG_SIZE                       157 config PSTORE_BLK_PMSG_SIZE
158         int "Size in Kbytes of pmsg to store"     158         int "Size in Kbytes of pmsg to store"
159         depends on PSTORE_BLK                     159         depends on PSTORE_BLK
160         depends on PSTORE_PMSG                    160         depends on PSTORE_PMSG
161         default 64                                161         default 64
162         help                                      162         help
163           This just sets size of pmsg (pmsg_si    163           This just sets size of pmsg (pmsg_size) for pstore/blk. The size is
164           in KB and must be a multiple of 4.      164           in KB and must be a multiple of 4.
165                                                   165 
166           NOTE that, both Kconfig and module p    166           NOTE that, both Kconfig and module parameters can configure
167           pstore/blk, but module parameters ha    167           pstore/blk, but module parameters have priority over Kconfig.
168                                                   168 
169 config PSTORE_BLK_CONSOLE_SIZE                    169 config PSTORE_BLK_CONSOLE_SIZE
170         int "Size in Kbytes of console log to     170         int "Size in Kbytes of console log to store"
171         depends on PSTORE_BLK                     171         depends on PSTORE_BLK
172         depends on PSTORE_CONSOLE                 172         depends on PSTORE_CONSOLE
173         default 64                                173         default 64
174         help                                      174         help
175           This just sets size of console log (    175           This just sets size of console log (console_size) to store via
176           pstore/blk. The size is in KB and mu    176           pstore/blk. The size is in KB and must be a multiple of 4.
177                                                   177 
178           NOTE that, both Kconfig and module p    178           NOTE that, both Kconfig and module parameters can configure
179           pstore/blk, but module parameters ha    179           pstore/blk, but module parameters have priority over Kconfig.
180                                                   180 
181 config PSTORE_BLK_FTRACE_SIZE                     181 config PSTORE_BLK_FTRACE_SIZE
182         int "Size in Kbytes of ftrace log to s    182         int "Size in Kbytes of ftrace log to store"
183         depends on PSTORE_BLK                     183         depends on PSTORE_BLK
184         depends on PSTORE_FTRACE                  184         depends on PSTORE_FTRACE
185         default 64                                185         default 64
186         help                                      186         help
187           This just sets size of ftrace log (f    187           This just sets size of ftrace log (ftrace_size) for pstore/blk. The
188           size is in KB and must be a multiple    188           size is in KB and must be a multiple of 4.
189                                                   189 
190           NOTE that, both Kconfig and module p    190           NOTE that, both Kconfig and module parameters can configure
191           pstore/blk, but module parameters ha    191           pstore/blk, but module parameters have priority over Kconfig.
                                                      

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