Commit | Line | Data |
---|---|---|
ca01d6dd | 1 | config PSTORE |
ee1d2674 | 2 | tristate "Persistent store support" |
58eb5b67 | 3 | select CRYPTO if PSTORE_COMPRESS |
ca01d6dd TL |
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. | |
1894a253 | 15 | |
cb3bee03 | 16 | config PSTORE_DEFLATE_COMPRESS |
58eb5b67 | 17 | tristate "DEFLATE (ZLIB) compression" |
fe1d4758 KC |
18 | default y |
19 | depends on PSTORE | |
cb3bee03 | 20 | select CRYPTO_DEFLATE |
fe1d4758 | 21 | help |
cb3bee03 GT |
22 | This option enables DEFLATE (also known as ZLIB) compression |
23 | algorithm support. | |
8cfc8ddc GT |
24 | |
25 | config PSTORE_LZO_COMPRESS | |
58eb5b67 | 26 | tristate "LZO compression" |
fe1d4758 | 27 | depends on PSTORE |
cb3bee03 | 28 | select CRYPTO_LZO |
fe1d4758 KC |
29 | help |
30 | This option enables LZO compression algorithm support. | |
8cfc8ddc GT |
31 | |
32 | config PSTORE_LZ4_COMPRESS | |
58eb5b67 | 33 | tristate "LZ4 compression" |
fe1d4758 | 34 | depends on PSTORE |
cb3bee03 | 35 | select CRYPTO_LZ4 |
fe1d4758 KC |
36 | help |
37 | This option enables LZ4 compression algorithm support. | |
239b7161 GT |
38 | |
39 | config PSTORE_LZ4HC_COMPRESS | |
58eb5b67 | 40 | tristate "LZ4HC compression" |
fe1d4758 | 41 | depends on PSTORE |
cb3bee03 | 42 | select CRYPTO_LZ4HC |
239b7161 GT |
43 | help |
44 | This option enables LZ4HC (high compression) mode algorithm. | |
45 | ||
46 | config PSTORE_842_COMPRESS | |
fe1d4758 KC |
47 | bool "842 compression" |
48 | depends on PSTORE | |
cb3bee03 | 49 | select CRYPTO_842 |
239b7161 GT |
50 | help |
51 | This option enables 842 compression algorithm support. | |
52 | ||
fe1d4758 KC |
53 | config PSTORE_COMPRESS |
54 | def_bool y | |
55 | depends on PSTORE | |
cb3bee03 | 56 | depends on PSTORE_DEFLATE_COMPRESS || PSTORE_LZO_COMPRESS || \ |
fe1d4758 KC |
57 | PSTORE_LZ4_COMPRESS || PSTORE_LZ4HC_COMPRESS || \ |
58 | PSTORE_842_COMPRESS | |
59 | ||
60 | choice | |
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: | |
cb3bee03 | 69 | deflate, lzo, lz4, lz4hc and 842. |
fe1d4758 | 70 | |
cb3bee03 | 71 | The default compression algorithm is deflate. |
fe1d4758 | 72 | |
cb3bee03 | 73 | config PSTORE_DEFLATE_COMPRESS_DEFAULT |
58eb5b67 | 74 | bool "deflate" if PSTORE_DEFLATE_COMPRESS |
fe1d4758 KC |
75 | |
76 | config PSTORE_LZO_COMPRESS_DEFAULT | |
58eb5b67 | 77 | bool "lzo" if PSTORE_LZO_COMPRESS |
fe1d4758 KC |
78 | |
79 | config PSTORE_LZ4_COMPRESS_DEFAULT | |
58eb5b67 | 80 | bool "lz4" if PSTORE_LZ4_COMPRESS |
fe1d4758 KC |
81 | |
82 | config PSTORE_LZ4HC_COMPRESS_DEFAULT | |
58eb5b67 | 83 | bool "lz4hc" if PSTORE_LZ4HC_COMPRESS |
fe1d4758 KC |
84 | |
85 | config PSTORE_842_COMPRESS_DEFAULT | |
58eb5b67 | 86 | bool "842" if PSTORE_842_COMPRESS |
fe1d4758 | 87 | |
8cfc8ddc GT |
88 | endchoice |
89 | ||
fe1d4758 KC |
90 | config PSTORE_COMPRESS_DEFAULT |
91 | string | |
92 | depends on PSTORE_COMPRESS | |
cb3bee03 | 93 | default "deflate" if PSTORE_DEFLATE_COMPRESS_DEFAULT |
fe1d4758 KC |
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 | ||
f29e5956 AV |
99 | config 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 | ||
9d5438f4 MS |
106 | config 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 | ||
060287b8 AV |
116 | config PSTORE_FTRACE |
117 | bool "Persistent function tracer" | |
118 | depends on PSTORE | |
119 | depends on FUNCTION_TRACER | |
65f8c95e | 120 | depends on DEBUG_FS |
060287b8 AV |
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 | ||
1894a253 AV |
129 | config PSTORE_RAM |
130 | tristate "Log panic/oops to a RAM buffer" | |
1894a253 | 131 | depends on PSTORE |
cddb8751 AV |
132 | depends on HAS_IOMEM |
133 | depends on HAVE_MEMBLOCK | |
134 | select REED_SOLOMON | |
135 | select REED_SOLOMON_ENC8 | |
136 | select REED_SOLOMON_DEC8 | |
1894a253 AV |
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 | ||
8c27ceff | 144 | For more information, see Documentation/admin-guide/ramoops.rst. |