linux-kernel - [PATCH v4 0/7] scripts/make_fit: Support ramdisks and faster operations

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Message-ID: <20251006230205.521341-1-sjg@chromium.org>
Date: Mon,  6 Oct 2025 17:01:51 -0600
From: Simon Glass <sjg@...omium.org>
To: linux-arm-kernel@...ts.infradead.org
Cc: Chen-Yu Tsai <wenst@...omium.org>,
	Ahmad Fatoum <a.fatoum@...gutronix.de>,
	Masahiro Yamada <masahiroy@...nel.org>,
	J . Neuschäfer <j.ne@...teo.net>,
	Nicolas Schier <nicolas@...sle.eu>,
	Tom Rini <trini@...sulko.com>,
	Simon Glass <sjg@...omium.org>,
	Ard Biesheuvel <ardb@...nel.org>,
	Catalin Marinas <catalin.marinas@....com>,
	David Sterba <dsterba@...e.com>,
	Josh Poimboeuf <jpoimboe@...nel.org>,
	Kees Cook <kees@...nel.org>,
	Nathan Chancellor <nathan@...nel.org>,
	Nick Terrell <terrelln@...com>,
	Nicolas Schier <nicolas.schier@...ux.dev>,
	Rong Xu <xur@...gle.com>,
	Will Deacon <will@...nel.org>,
	linux-kbuild@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v4 0/7] scripts/make_fit: Support ramdisks and faster operations

This series updates 'make image.fit' to support adding a ramdisk to the
FIT, either one provided as a parameter or one created from all the
kernel modules.

It also includes a few performance improvement, so that building a FIT
from ~450MB of kernel/module/devicetree files only takes a few seconds
on a modern machine.

Changes in v4:
- Provide the list of modules from the Makefile
- Reduce verbosity (don't print every module filename)
- Rename the Makefile variable from 'EXTRA' to 'MAKE_FIT_FLAGS'
- Use an empty FIT_MODULES to disable the feature, instead of '0'
- Make use of the 'modules' dependency to ensure modules are built
- Pass the list of modules to the script

Changes in v3:
- Move the ramdisk chunk into the correct patch
- Add a comment at the top of the file about the -r option
- Count the ramdisk in the total files
- Update the commit message
- Update the commit message
- Add a way to add built modules into the FIT

Changes in v2:
- Don't compress the ramdisk as it is already compressed

Simon Glass (7):
  scripts/make_fit: Speed up operation
  scripts/make_fit: Support an initial ramdisk
  scripts/make_fit: Move dtb processing into a function
  scripts/make_fit: Provide a way to add built modules
  kbuild: Allow adding modules into the FIT ramdisk
  scripts/make_fit: Support a few more parallel compressors
  scripts/make_fit: Compress dtbs in parallel

 arch/arm64/boot/Makefile |   4 +
 scripts/Makefile.lib     |  10 +-
 scripts/make_fit.py      | 264 +++++++++++++++++++++++++++++++++------
 3 files changed, 239 insertions(+), 39 deletions(-)

-- 
2.43.0

base-commit: 4a71531471926e3c391665ee9c42f4e0295a4585
branch: fita4