mirror of
https://github.com/torvalds/linux.git
synced 2024-11-16 17:12:06 +00:00
f29e5956ae
Pstore doesn't support logging kernel messages in run-time, it only dumps dmesg when kernel oopses/panics. This makes pstore useless for debugging hangs caused by HW issues or improper use of HW (e.g. weird device inserted -> driver tried to write a reserved bits -> SoC hanged. In that case we don't get any messages in the pstore. Therefore, let's add a runtime logging support: PSTORE_TYPE_CONSOLE. Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org> Acked-by: Kees Cook <keescook@chromium.org> Acked-by: Colin Cross <ccross@android.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
38 lines
1.2 KiB
Plaintext
38 lines
1.2 KiB
Plaintext
config PSTORE
|
|
bool "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.
|
|
|
|
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_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.
|