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author | Nick Kossifidis <mick@ics.forth.gr> | 2018-11-18 03:06:56 +0300 |
---|---|---|
committer | Palmer Dabbelt <palmer@sifive.com> | 2018-12-21 19:15:02 +0300 |
commit | 3aed8c43267ebad70b5130d21155db6d9d7c8ebe (patch) | |
tree | c83e07949d362d4e5a5fe29dbf365803fb526381 /arch | |
parent | 397182e0db56b8894a43631ce72de14d90a29834 (diff) | |
download | linux-3aed8c43267ebad70b5130d21155db6d9d7c8ebe.tar.xz |
RISC-V: Update Kconfig to better handle CMDLINE
Added a menu to choose how the built-in command line will be
used and CMDLINE_EXTEND for compatibility with FDT code.
v2: Improved help messages, removed references to bootloader
and made them more descriptive. I also asked help from a
friend who's a language expert just in case.
v3: This time used the corrected text
v4: Copy the config strings from the arm32 port.
v5: Actually copy the config strings from the arm32 port.
Signed-off-by: Nick Kossifidis <mick@ics.forth.gr>
Signed-off-by: Debbie Maliotaki <dmaliotaki@gmail.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/riscv/Kconfig | 57 |
1 files changed, 33 insertions, 24 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 55da93f4e818..23ac6d6f9ab2 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -227,39 +227,48 @@ endmenu menu "Boot options" -config CMDLINE_BOOL - bool "Built-in kernel command line" +config CMDLINE + string "Built-in kernel command line" help - For most platforms, it is firmware or second stage bootloader - that by default specifies the kernel command line options. - However, it might be necessary or advantageous to either override - the default kernel command line or add a few extra options to it. - For such cases, this option allows hardcoding command line options - directly into the kernel. + For most platforms, the arguments for the kernel's command line + are provided at run-time, during boot. However, there are cases + where either no arguments are being provided or the provided + arguments are insufficient or even invalid. - For that, choose 'Y' here and fill in the extra boot parameters - in CONFIG_CMDLINE. + When that occurs, it is possible to define a built-in command + line here and choose how the kernel should use it later on. - The built-in options will be concatenated to the default command - line if CMDLINE_FORCE is set to 'N'. Otherwise, the default - command line will be ignored and replaced by the built-in string. +choice + prompt "Built-in command line usage" if CMDLINE != "" + default CMDLINE_FALLBACK + help + Choose how the kernel will handle the provided built-in command + line. -config CMDLINE - string "Built-in kernel command string" - depends on CMDLINE_BOOL - default "" +config CMDLINE_FALLBACK + bool "Use bootloader kernel arguments if available" help - Supply command-line options at build time by entering them here. + Use the built-in command line as fallback in case we get nothing + during boot. This is the default behaviour. + +config CMDLINE_EXTEND + bool "Extend bootloader kernel arguments" + help + The command-line arguments provided during boot will be + appended to the built-in command line. This is useful in + cases where the provided arguments are insufficient and + you don't want to or cannot modify them. + config CMDLINE_FORCE - bool "Built-in command line overrides bootloader arguments" - depends on CMDLINE_BOOL + bool "Always use the default kernel command string" help - Set this option to 'Y' to have the kernel ignore the bootloader - or firmware command line. Instead, the built-in command line - will be used exclusively. + Always use the built-in command line, even if we get one during + boot. This is useful in case you need to override the provided + command line on systems where you don't have or want control + over it. - If you don't know what to do here, say N. +endchoice endmenu |