Messages in this thread | | | From | Masami Hiramatsu <> | Subject | [PATCH v8 0/4] bootconfig: Support embedding a bootconfig in kernel for non initrd boot | Date | Wed, 6 Apr 2022 11:30:48 +0900 |
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Hi,
Here are the 8th version of the patchset to enable kernel embedded bootconfig for non-initrd kernel boot environment. This version fixes a build error when CONFIG_BLK_DEV_INITRD=n. Previous version is here [1];
[1] https://lore.kernel.org/all/164871505771.178991.7870442736805590948.stgit@devnote2/T/#u
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_BOOT_CONFIG_EMBED=y and set the file path to CONFIG_BOOT_CONFIG_EMBED_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). The CONFIG_BOOT_CONFIG_EMBED_FILE can take both absolute and relative path.
This is requested by Padmanabha at the below thread[2];
[2] https://lore.kernel.org/all/20220307184011.GA2570@pswork/T/#u
Thank you,
---
Masami Hiramatsu (4): bootconfig: Make the bootconfig.o as a normal object file 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 | 31 ++++++++++++++++++++++-- MAINTAINERS | 1 + include/linux/bootconfig.h | 10 ++++++++ init/Kconfig | 21 ++++++++++++++++- init/main.c | 38 +++++++++++++++--------------- lib/.gitignore | 1 + lib/Makefile | 10 +++++++- lib/bootconfig-data.S | 10 ++++++++ lib/bootconfig.c | 13 ++++++++++ 9 files changed, 111 insertions(+), 24 deletions(-) create mode 100644 lib/bootconfig-data.S
-- Masami Hiramatsu (Linaro) <mhiramat@kernel.org>
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