linux/lib/bootconfig-data.S at 40b9969796bfa49ed1b0f7ddc254f48cb2ac6d2c - mirrors/linux - Nagai Git

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Masami Hiramatsu a2a9d67a26 bootconfig: Support embedding a bootconfig file in kernel

This allows kernel developer to embed a default bootconfig file in
the kernel instead of embedding it in the initrd. This will be good
for who are using the kernel without initrd, or who needs a default
bootconfigs.
This needs to set two kconfigs: CONFIG_BOOT_CONFIG_EMBED=y and set
the file path to CONFIG_BOOT_CONFIG_EMBED_FILE.

Note that you still need 'bootconfig' command line option to load the
embedded bootconfig. Also if you boot using an initrd with a different
bootconfig, the kernel will use the bootconfig in the initrd, instead
of the default bootconfig.

Link: https://lkml.kernel.org/r/164921227943.1090670.14035119557571329218.stgit@devnote2

Cc: Padmanabha Srinivasaiah <treasure4paddy@gmail.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Sami Tolvanen <samitolvanen@google.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

2022-04-26 17:58:51 -04:00

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 /* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Embed default bootconfig in the kernel.
  */
 	.section .init.rodata, "aw"
 	.global embedded_bootconfig_data
 embedded_bootconfig_data:
 	.incbin "lib/default.bconf"
 	.global embedded_bootconfig_data_end
 embedded_bootconfig_data_end: