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Commit | Line | Data |
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ec8f24b7 | 1 | # SPDX-License-Identifier: GPL-2.0-only |
ca01d6dd | 2 | config PSTORE |
ee1d2674 | 3 | tristate "Persistent store support" |
58eb5b67 | 4 | select CRYPTO if PSTORE_COMPRESS |
ca01d6dd TL |
5 | default n |
6 | help | |
7 | This option enables generic access to platform level | |
8 | persistent storage via "pstore" filesystem that can | |
9 | be mounted as /dev/pstore. Only useful if you have | |
10 | a platform level driver that registers with pstore to | |
11 | provide the data, so you probably should just go say "Y" | |
12 | (or "M") to a platform specific persistent store driver | |
13 | (e.g. ACPI_APEI on X86) which will select this for you. | |
14 | If you don't have a platform persistent store driver, | |
15 | say N. | |
1894a253 | 16 | |
cb3bee03 | 17 | config PSTORE_DEFLATE_COMPRESS |
58eb5b67 | 18 | tristate "DEFLATE (ZLIB) compression" |
fe1d4758 KC |
19 | default y |
20 | depends on PSTORE | |
cb3bee03 | 21 | select CRYPTO_DEFLATE |
fe1d4758 | 22 | help |
cb3bee03 GT |
23 | This option enables DEFLATE (also known as ZLIB) compression |
24 | algorithm support. | |
8cfc8ddc GT |
25 | |
26 | config PSTORE_LZO_COMPRESS | |
58eb5b67 | 27 | tristate "LZO compression" |
fe1d4758 | 28 | depends on PSTORE |
cb3bee03 | 29 | select CRYPTO_LZO |
fe1d4758 KC |
30 | help |
31 | This option enables LZO compression algorithm support. | |
8cfc8ddc GT |
32 | |
33 | config PSTORE_LZ4_COMPRESS | |
58eb5b67 | 34 | tristate "LZ4 compression" |
fe1d4758 | 35 | depends on PSTORE |
cb3bee03 | 36 | select CRYPTO_LZ4 |
fe1d4758 KC |
37 | help |
38 | This option enables LZ4 compression algorithm support. | |
239b7161 GT |
39 | |
40 | config PSTORE_LZ4HC_COMPRESS | |
58eb5b67 | 41 | tristate "LZ4HC compression" |
fe1d4758 | 42 | depends on PSTORE |
cb3bee03 | 43 | select CRYPTO_LZ4HC |
239b7161 GT |
44 | help |
45 | This option enables LZ4HC (high compression) mode algorithm. | |
46 | ||
47 | config PSTORE_842_COMPRESS | |
fe1d4758 KC |
48 | bool "842 compression" |
49 | depends on PSTORE | |
cb3bee03 | 50 | select CRYPTO_842 |
239b7161 GT |
51 | help |
52 | This option enables 842 compression algorithm support. | |
53 | ||
1021bcf4 GT |
54 | config PSTORE_ZSTD_COMPRESS |
55 | bool "zstd compression" | |
56 | depends on PSTORE | |
57 | select CRYPTO_ZSTD | |
58 | help | |
59 | This option enables zstd compression algorithm support. | |
60 | ||
fe1d4758 KC |
61 | config PSTORE_COMPRESS |
62 | def_bool y | |
63 | depends on PSTORE | |
cb3bee03 | 64 | depends on PSTORE_DEFLATE_COMPRESS || PSTORE_LZO_COMPRESS || \ |
fe1d4758 | 65 | PSTORE_LZ4_COMPRESS || PSTORE_LZ4HC_COMPRESS || \ |
1021bcf4 | 66 | PSTORE_842_COMPRESS || PSTORE_ZSTD_COMPRESS |
fe1d4758 KC |
67 | |
68 | choice | |
69 | prompt "Default pstore compression algorithm" | |
70 | depends on PSTORE_COMPRESS | |
71 | help | |
72 | This option chooses the default active compression algorithm. | |
73 | This change be changed at boot with "pstore.compress=..." on | |
74 | the kernel command line. | |
75 | ||
1021bcf4 GT |
76 | Currently, pstore has support for 6 compression algorithms: |
77 | deflate, lzo, lz4, lz4hc, 842 and zstd. | |
fe1d4758 | 78 | |
cb3bee03 | 79 | The default compression algorithm is deflate. |
fe1d4758 | 80 | |
cb3bee03 | 81 | config PSTORE_DEFLATE_COMPRESS_DEFAULT |
58eb5b67 | 82 | bool "deflate" if PSTORE_DEFLATE_COMPRESS |
fe1d4758 KC |
83 | |
84 | config PSTORE_LZO_COMPRESS_DEFAULT | |
58eb5b67 | 85 | bool "lzo" if PSTORE_LZO_COMPRESS |
fe1d4758 KC |
86 | |
87 | config PSTORE_LZ4_COMPRESS_DEFAULT | |
58eb5b67 | 88 | bool "lz4" if PSTORE_LZ4_COMPRESS |
fe1d4758 KC |
89 | |
90 | config PSTORE_LZ4HC_COMPRESS_DEFAULT | |
58eb5b67 | 91 | bool "lz4hc" if PSTORE_LZ4HC_COMPRESS |
fe1d4758 KC |
92 | |
93 | config PSTORE_842_COMPRESS_DEFAULT | |
58eb5b67 | 94 | bool "842" if PSTORE_842_COMPRESS |
fe1d4758 | 95 | |
1021bcf4 GT |
96 | config PSTORE_ZSTD_COMPRESS_DEFAULT |
97 | bool "zstd" if PSTORE_ZSTD_COMPRESS | |
98 | ||
8cfc8ddc GT |
99 | endchoice |
100 | ||
fe1d4758 KC |
101 | config PSTORE_COMPRESS_DEFAULT |
102 | string | |
103 | depends on PSTORE_COMPRESS | |
cb3bee03 | 104 | default "deflate" if PSTORE_DEFLATE_COMPRESS_DEFAULT |
fe1d4758 KC |
105 | default "lzo" if PSTORE_LZO_COMPRESS_DEFAULT |
106 | default "lz4" if PSTORE_LZ4_COMPRESS_DEFAULT | |
107 | default "lz4hc" if PSTORE_LZ4HC_COMPRESS_DEFAULT | |
108 | default "842" if PSTORE_842_COMPRESS_DEFAULT | |
1021bcf4 | 109 | default "zstd" if PSTORE_ZSTD_COMPRESS_DEFAULT |
fe1d4758 | 110 | |
f29e5956 AV |
111 | config PSTORE_CONSOLE |
112 | bool "Log kernel console messages" | |
113 | depends on PSTORE | |
114 | help | |
115 | When the option is enabled, pstore will log all kernel | |
116 | messages, even if no oops or panic happened. | |
117 | ||
9d5438f4 MS |
118 | config PSTORE_PMSG |
119 | bool "Log user space messages" | |
120 | depends on PSTORE | |
121 | help | |
122 | When the option is enabled, pstore will export a character | |
123 | interface /dev/pmsg0 to log user space messages. On reboot | |
124 | data can be retrieved from /sys/fs/pstore/pmsg-ramoops-[ID]. | |
125 | ||
126 | If unsure, say N. | |
127 | ||
060287b8 AV |
128 | config PSTORE_FTRACE |
129 | bool "Persistent function tracer" | |
130 | depends on PSTORE | |
131 | depends on FUNCTION_TRACER | |
65f8c95e | 132 | depends on DEBUG_FS |
060287b8 AV |
133 | help |
134 | With this option kernel traces function calls into a persistent | |
135 | ram buffer that can be decoded and dumped after reboot through | |
136 | pstore filesystem. It can be used to determine what function | |
137 | was last called before a reset or panic. | |
138 | ||
139 | If unsure, say N. | |
140 | ||
1894a253 AV |
141 | config PSTORE_RAM |
142 | tristate "Log panic/oops to a RAM buffer" | |
1894a253 | 143 | depends on PSTORE |
cddb8751 | 144 | depends on HAS_IOMEM |
cddb8751 AV |
145 | select REED_SOLOMON |
146 | select REED_SOLOMON_ENC8 | |
147 | select REED_SOLOMON_DEC8 | |
1894a253 AV |
148 | help |
149 | This enables panic and oops messages to be logged to a circular | |
150 | buffer in RAM where it can be read back at some later point. | |
151 | ||
152 | Note that for historical reasons, the module will be named | |
153 | "ramoops.ko". | |
154 | ||
8c27ceff | 155 | For more information, see Documentation/admin-guide/ramoops.rst. |