8cfc8ddc99
Like zlib compression in pstore, this patch added lzo and lz4 compression support so that users can have more options and better compression ratio. The original code treats the compressed data together with the uncompressed ECC correction notice by using zlib decompress. The ECC correction notice is missing in the decompression process. The treatment also makes lzo and lz4 not working. So I treat them separately by using pstore_decompress() to treat the compressed data, and memcpy() to treat the uncompressed ECC correction notice. Signed-off-by: Geliang Tang <geliangtang@163.com> Signed-off-by: Kees Cook <keescook@chromium.org>
90 lines
2.6 KiB
Plaintext
90 lines
2.6 KiB
Plaintext
config PSTORE
|
|
tristate "Persistent store support"
|
|
default n
|
|
help
|
|
This option enables generic access to platform level
|
|
persistent storage via "pstore" filesystem that can
|
|
be mounted as /dev/pstore. Only useful if you have
|
|
a platform level driver that registers with pstore to
|
|
provide the data, so you probably should just go say "Y"
|
|
(or "M") to a platform specific persistent store driver
|
|
(e.g. ACPI_APEI on X86) which will select this for you.
|
|
If you don't have a platform persistent store driver,
|
|
say N.
|
|
|
|
choice
|
|
prompt "Choose compression algorithm"
|
|
depends on PSTORE
|
|
default PSTORE_ZLIB_COMPRESS
|
|
help
|
|
This option chooses compression algorithm.
|
|
|
|
config PSTORE_ZLIB_COMPRESS
|
|
bool "ZLIB"
|
|
select ZLIB_DEFLATE
|
|
select ZLIB_INFLATE
|
|
help
|
|
This option enables ZLIB compression algorithm support.
|
|
|
|
config PSTORE_LZO_COMPRESS
|
|
bool "LZO"
|
|
select LZO_COMPRESS
|
|
select LZO_DECOMPRESS
|
|
help
|
|
This option enables LZO compression algorithm support.
|
|
|
|
config PSTORE_LZ4_COMPRESS
|
|
bool "LZ4"
|
|
select LZ4_COMPRESS
|
|
select LZ4_DECOMPRESS
|
|
help
|
|
This option enables LZ4 compression algorithm support.
|
|
endchoice
|
|
|
|
config PSTORE_CONSOLE
|
|
bool "Log kernel console messages"
|
|
depends on PSTORE
|
|
help
|
|
When the option is enabled, pstore will log all kernel
|
|
messages, even if no oops or panic happened.
|
|
|
|
config PSTORE_PMSG
|
|
bool "Log user space messages"
|
|
depends on PSTORE
|
|
help
|
|
When the option is enabled, pstore will export a character
|
|
interface /dev/pmsg0 to log user space messages. On reboot
|
|
data can be retrieved from /sys/fs/pstore/pmsg-ramoops-[ID].
|
|
|
|
If unsure, say N.
|
|
|
|
config PSTORE_FTRACE
|
|
bool "Persistent function tracer"
|
|
depends on PSTORE
|
|
depends on FUNCTION_TRACER
|
|
depends on DEBUG_FS
|
|
help
|
|
With this option kernel traces function calls into a persistent
|
|
ram buffer that can be decoded and dumped after reboot through
|
|
pstore filesystem. It can be used to determine what function
|
|
was last called before a reset or panic.
|
|
|
|
If unsure, say N.
|
|
|
|
config PSTORE_RAM
|
|
tristate "Log panic/oops to a RAM buffer"
|
|
depends on PSTORE
|
|
depends on HAS_IOMEM
|
|
depends on HAVE_MEMBLOCK
|
|
select REED_SOLOMON
|
|
select REED_SOLOMON_ENC8
|
|
select REED_SOLOMON_DEC8
|
|
help
|
|
This enables panic and oops messages to be logged to a circular
|
|
buffer in RAM where it can be read back at some later point.
|
|
|
|
Note that for historical reasons, the module will be named
|
|
"ramoops.ko".
|
|
|
|
For more information, see Documentation/ramoops.txt.
|