[PATCH v2 0/3] bootconfig: Support embedding a bootconfig in kernel for non initrd boot

Masami Hiramatsu
2022-03-14T09:08:32Z

Hi,

Here are the 3rd version of the patchset to enable kernel embedded bootconfig
for non-initrd kernel boot environment. In this version, I fixed some typo in
the document patch [3/3].

You can embed a bootconfig file into the kernel as a default bootconfig,
which will be used if there is no initrd or no bootconfig is attached to initrd.

This needs 2 options: CONFIG_EMBED_BOOT_CONFIG=y and set the file
path to CONFIG_EMBED_BOOT_CONFIG_FILE. Even if you embed the bootconfig file
to the kernel, it will not be enabled unless you pass "bootconfig" kernel
command line option at boot. Moreover, since this is just a "default"
bootconfig, you can override it with a new bootconfig if you attach another
bootconfig to the initrd (if possible).
CONFIG_EMBED_BOOT_CONFIG_FILE can take both absolute and relative path, but
to simplify and make it independent from the build environment, I recommend
you to use an absolute path for that.

This is requested by Padmanabha at the below thread;

https://lore.kernel.org/all/20220307184011.GA2570@pswork/T/#u

Thank you,

---

Masami Hiramatsu (3):
bootconfig: Check the checksum before removing the bootconfig from initrd
bootconfig: Support embedding a bootconfig file in kernel
docs: bootconfig: Add how to embed the bootconfig into kernel

Documentation/admin-guide/bootconfig.rst | 30 ++++++++++++++++++++++++++---
include/linux/bootconfig.h | 10 ++++++++++
init/Kconfig | 21 ++++++++++++++++++++
init/main.c | 31 +++++++++++++++---------------
lib/.gitignore | 1 +
lib/Makefile | 12 ++++++++++++
lib/bootconfig.c | 23 ++++++++++++++++++++++
7 files changed, 110 insertions(+), 18 deletions(-)

--
Masami Hiramatsu (Linaro) <mhiramat@kernel.org>