diff options
| author | Paul Walmsley <[email protected]> | 2018-12-17 19:15:12 -0800 |
|---|---|---|
| committer | Palmer Dabbelt <[email protected]> | 2019-01-07 08:08:00 -0800 |
| commit | 8fd6e05c7463b635e51ec7df0a1858c1b5a6e350 (patch) | |
| tree | 1e57a65f63d0e3e9f42b89926202c13f6e16b157 | |
| parent | d0df00e30e4bf9bc27ddbd092ad683ff6121b360 (diff) | |
arch: riscv: support kernel command line forcing when no DTB passed
CONFIG_CMDLINE_FORCE doesn't work on RISC-V when no DTB is passed into
the kernel. This is because the code that forces the kernel command
line only runs if a valid DTB is present at boot. During debugging,
it's useful to have the ability to force kernel command lines even
when no DTB is present. This patch adds support for doing so.
Cc: Palmer Dabbelt <[email protected]>
Cc: Albert Ou <[email protected]>
Cc: [email protected]
Cc: [email protected] (open list)
Signed-off-by: Paul Walmsley <[email protected]>
Signed-off-by: Paul Walmsley <[email protected]>
Signed-off-by: Palmer Dabbelt <[email protected]>
| -rw-r--r-- | arch/riscv/kernel/setup.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c index fc8006a042eb..6e079e94b638 100644 --- a/arch/riscv/kernel/setup.c +++ b/arch/riscv/kernel/setup.c @@ -149,7 +149,14 @@ asmlinkage void __init setup_vm(void) void __init parse_dtb(unsigned int hartid, void *dtb) { - early_init_dt_scan(__va(dtb)); + if (!early_init_dt_scan(__va(dtb))) + return; + + pr_err("No DTB passed to the kernel\n"); +#ifdef CONFIG_CMDLINE_FORCE + strlcpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE); + pr_info("Forcing kernel command line to: %s\n", boot_command_line); +#endif } static void __init setup_bootmem(void) |