tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1config PSTORE
2 tristate "Persistent store support"
3 select CRYPTO if PSTORE_COMPRESS
4 default n
5 help
6 This option enables generic access to platform level
7 persistent storage via "pstore" filesystem that can
8 be mounted as /dev/pstore. Only useful if you have
9 a platform level driver that registers with pstore to
10 provide the data, so you probably should just go say "Y"
11 (or "M") to a platform specific persistent store driver
12 (e.g. ACPI_APEI on X86) which will select this for you.
13 If you don't have a platform persistent store driver,
14 say N.
15
16config PSTORE_DEFLATE_COMPRESS
17 tristate "DEFLATE (ZLIB) compression"
18 default y
19 depends on PSTORE
20 select CRYPTO_DEFLATE
21 help
22 This option enables DEFLATE (also known as ZLIB) compression
23 algorithm support.
24
25config PSTORE_LZO_COMPRESS
26 tristate "LZO compression"
27 depends on PSTORE
28 select CRYPTO_LZO
29 help
30 This option enables LZO compression algorithm support.
31
32config PSTORE_LZ4_COMPRESS
33 tristate "LZ4 compression"
34 depends on PSTORE
35 select CRYPTO_LZ4
36 help
37 This option enables LZ4 compression algorithm support.
38
39config PSTORE_LZ4HC_COMPRESS
40 tristate "LZ4HC compression"
41 depends on PSTORE
42 select CRYPTO_LZ4HC
43 help
44 This option enables LZ4HC (high compression) mode algorithm.
45
46config PSTORE_842_COMPRESS
47 bool "842 compression"
48 depends on PSTORE
49 select CRYPTO_842
50 help
51 This option enables 842 compression algorithm support.
52
53config PSTORE_COMPRESS
54 def_bool y
55 depends on PSTORE
56 depends on PSTORE_DEFLATE_COMPRESS || PSTORE_LZO_COMPRESS || \
57 PSTORE_LZ4_COMPRESS || PSTORE_LZ4HC_COMPRESS || \
58 PSTORE_842_COMPRESS
59
60choice
61 prompt "Default pstore compression algorithm"
62 depends on PSTORE_COMPRESS
63 help
64 This option chooses the default active compression algorithm.
65 This change be changed at boot with "pstore.compress=..." on
66 the kernel command line.
67
68 Currently, pstore has support for 5 compression algorithms:
69 deflate, lzo, lz4, lz4hc and 842.
70
71 The default compression algorithm is deflate.
72
73 config PSTORE_DEFLATE_COMPRESS_DEFAULT
74 bool "deflate" if PSTORE_DEFLATE_COMPRESS
75
76 config PSTORE_LZO_COMPRESS_DEFAULT
77 bool "lzo" if PSTORE_LZO_COMPRESS
78
79 config PSTORE_LZ4_COMPRESS_DEFAULT
80 bool "lz4" if PSTORE_LZ4_COMPRESS
81
82 config PSTORE_LZ4HC_COMPRESS_DEFAULT
83 bool "lz4hc" if PSTORE_LZ4HC_COMPRESS
84
85 config PSTORE_842_COMPRESS_DEFAULT
86 bool "842" if PSTORE_842_COMPRESS
87
88endchoice
89
90config PSTORE_COMPRESS_DEFAULT
91 string
92 depends on PSTORE_COMPRESS
93 default "deflate" if PSTORE_DEFLATE_COMPRESS_DEFAULT
94 default "lzo" if PSTORE_LZO_COMPRESS_DEFAULT
95 default "lz4" if PSTORE_LZ4_COMPRESS_DEFAULT
96 default "lz4hc" if PSTORE_LZ4HC_COMPRESS_DEFAULT
97 default "842" if PSTORE_842_COMPRESS_DEFAULT
98
99config PSTORE_CONSOLE
100 bool "Log kernel console messages"
101 depends on PSTORE
102 help
103 When the option is enabled, pstore will log all kernel
104 messages, even if no oops or panic happened.
105
106config PSTORE_PMSG
107 bool "Log user space messages"
108 depends on PSTORE
109 help
110 When the option is enabled, pstore will export a character
111 interface /dev/pmsg0 to log user space messages. On reboot
112 data can be retrieved from /sys/fs/pstore/pmsg-ramoops-[ID].
113
114 If unsure, say N.
115
116config PSTORE_FTRACE
117 bool "Persistent function tracer"
118 depends on PSTORE
119 depends on FUNCTION_TRACER
120 depends on DEBUG_FS
121 help
122 With this option kernel traces function calls into a persistent
123 ram buffer that can be decoded and dumped after reboot through
124 pstore filesystem. It can be used to determine what function
125 was last called before a reset or panic.
126
127 If unsure, say N.
128
129config PSTORE_RAM
130 tristate "Log panic/oops to a RAM buffer"
131 depends on PSTORE
132 depends on HAS_IOMEM
133 depends on HAVE_MEMBLOCK
134 select REED_SOLOMON
135 select REED_SOLOMON_ENC8
136 select REED_SOLOMON_DEC8
137 help
138 This enables panic and oops messages to be logged to a circular
139 buffer in RAM where it can be read back at some later point.
140
141 Note that for historical reasons, the module will be named
142 "ramoops.ko".
143
144 For more information, see Documentation/admin-guide/ramoops.rst.