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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2017-01-11 09:14:52 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-01-16 07:27:55 +0100 |
| commit | 89175cf766869307c4f57a7a5f63d2819e76c41b (patch) | |
| tree | 6046a08b5f2c1a012094053aa6287a76058b95c6 /arch/s390/Kconfig.debug | |
| parent | s390/sclp: always stay within bounds of the early sccb (diff) | |
| download | linux-89175cf766869307c4f57a7a5f63d2819e76c41b.tar.xz linux-89175cf766869307c4f57a7a5f63d2819e76c41b.zip | |
s390: provide sclp based boot console
Use the early sclp code to provide a boot console. This boot console
is available if the kernel parameter "earlyprintk" has been specified,
just like it works for other architectures that also provide an early
boot console.
This makes debugging of early problems much easier, since now we
finally have working console output even before memory detection is
running.
The boot console will be automatically disabled as soon as another
console will be registered.
Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/Kconfig.debug')
| -rw-r--r-- | arch/s390/Kconfig.debug | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/s390/Kconfig.debug b/arch/s390/Kconfig.debug index 26c5d5beb4be..32b3e3bfd022 100644 --- a/arch/s390/Kconfig.debug +++ b/arch/s390/Kconfig.debug @@ -20,4 +20,8 @@ config S390_PTDUMP config DEBUG_SET_MODULE_RONX def_bool y depends on MODULES + +config EARLY_PRINTK + def_bool y + endmenu |