Re: [PATCH] arm64: update Kconfig to better handle CMDLINE

[Jan Kaisrlik]

+ linux-kernel


On Fri, Sep 20, 2019 at 6:43 PM <ja.kaisrlik@xxxxxxxxx> wrote:
>
> From: Jan Kaisrlik <ja.kaisrlik@xxxxxxxxx>
>
> Added a menu to choose how to CMDLINE will be handled. Config strings
> were copied from arm32 port.
>
> Signed-off-by: Jan Kaisrlik <ja.kaisrlik@xxxxxxxxx>
> ---
>  arch/arm64/Kconfig | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
>
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index 3adcec05b1f6..b1dd948f9665 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -1538,6 +1538,23 @@ config CMDLINE
>           entering them here. As a minimum, you should specify the the
>           root device (e.g. root=/dev/nfs).
>
> +choice
> +       prompt "Kernel command line type" if CMDLINE != ""
> +       default CMDLINE_FROM_BOOTLOADER
> +
> +config CMDLINE_FROM_BOOTLOADER
> +       bool "Use bootloader kernel arguments if available"
> +       help
> +         Uses the command-line options passed by the boot loader. If
> +         the boot loader doesn't provide any, the default kernel command
> +         string provided in CMDLINE will be used.
> +
> +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.
> +
>  config CMDLINE_FORCE
>         bool "Always use the default kernel command string"
>         help
> @@ -1545,6 +1562,7 @@ config CMDLINE_FORCE
>           loader passes other arguments to the kernel.
>           This is useful if you cannot or don't want to change the
>           command-line options your boot loader passes to the kernel.
> +endchoice
>
>  config EFI_STUB
>         bool
> --
> 2.23.0
>