Le 24/07/2019 à 07:33, Chris Packham a écrit :
Device tree aware platforms can make use of CMDLINE_EXTEND to extend the kernel command line provided by the bootloader. This is particularly useful to set parameters for built-in modules that would otherwise be done at module insertion. Add support for this in the powerpc architecture. Signed-off-by: Chris Packham <[email protected]> --- arch/powerpc/Kconfig | 12 ++++++++++++
I think you also have to implement some stuff in early_cmdline_parse() in arch/powerpc/kernel/prom_init.c
Maybe look at https://patchwork.ozlabs.org/patch/1074126/ Christophe
1 file changed, 12 insertions(+) diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index d8dcd8820369..cd9b3974aa36 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -851,6 +851,11 @@ config CMDLINE some command-line options at build time by entering them here. In most cases you will need to specify the root device here.+choice+ prompt "Kernel command line type" if CMDLINE != "" + default CMDLINE_FORCE + depends on CMDLINE_BOOL + config CMDLINE_FORCE bool "Always use the default kernel command string" depends on CMDLINE_BOOL @@ -860,6 +865,13 @@ config CMDLINE_FORCE This is useful if you cannot or don't want to change the command-line options your boot loader passes to the kernel.+config CMDLINE_EXTEND+ bool "Extend bootloader kernel arguments" + help + The command-line arguments provided by the boot loader will be + appended to the default kernel command string. +endchoice + config EXTRA_TARGETS string "Additional default image types" help
