The userspace pieces (xbc_snprint_cmdline() in lib/, tools/bootconfig -C) already landed; this series wires the rendered cmdline into the kernel.
Motivation: today the embedded bootconfig is parsed at runtime, after parse_early_param() has already run, so early_param() handlers can't see embedded values. Folding the kernel.* subtree into the cmdline at build time gives a CONFIG_CMDLINE-equivalent for embedded-bootconfig users without forcing them to maintain two cmdline sources. Behaviorally, the "kernel" subtree is rendered to a flat string at build time and stashed in .init.rodata. setup_arch() prepends it to boot_command_line before parse_early_param() runs. Overflow is a soft error: the helper logs and leaves boot_command_line untouched rather than panicking, so an oversized embedded bconf cannot brick a boot. Signed-off-by: Breno Leitao <[email protected]> --- Breno Leitao (4): bootconfig: return 0 from xbc_snprint_cmdline() for a leaf root bootconfig: render embedded bootconfig as a kernel cmdline at build time bootconfig: add xbc_prepend_embedded_cmdline() helper x86/setup: prepend embedded bootconfig cmdline before parse_early_param Makefile | 5 ++++ arch/x86/Kconfig | 1 + arch/x86/kernel/setup.c | 3 +++ include/linux/bootconfig.h | 7 ++++++ init/Kconfig | 33 ++++++++++++++++++++++++++ init/main.c | 19 ++++++++++++--- lib/Makefile | 16 +++++++++++++ lib/bootconfig.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++ lib/embedded-cmdline.S | 16 +++++++++++++ tools/bootconfig/Makefile | 2 +- 10 files changed, 156 insertions(+), 4 deletions(-) --- base-commit: e7e28506af98ce4e1059e5ec59334b335c00a246 change-id: 20260508-bootconfig_using_tools-cfa7aa9d6a5a Best regards, -- Breno Leitao <[email protected]>
