On Mon, Jan 06, 2025 at 02:52:59PM +0100, Christophe Leroy wrote: > > > Le 02/01/2025 à 19:31, J. Neuschäfer via B4 Relay a écrit : > > [Vous ne recevez pas souvent de courriers de devnull+j.ne.posteo.net@xxxxxxxxxx. Découvrez pourquoi ceci est important à https://aka.ms/LearnAboutSenderIdentification ] > > > > From: "J. Neuschäfer" <j.ne@xxxxxxxxxx> > > > > The Flat Image Tree (FIT) format combines a kernel, a set of > > devicetrees, and optionally additional resources into a single file that > > can be loaded by a bootloader such as U-Boot. Generating a FIT image as > > part of the kernel build reduces the need for additional build scripts, > > and produces a single boot image without falling back to one of the > > many legacy methods implemented in arch/powerpc/boot/Makefile, which > > would require additional changes for arch/powerpc/boot for each board. > > Will that allow compressed vmlinux ? Yes, the make_fit.py script can compress included data (kernel, dtb), and the logic in scripts/Makefile.lib makes use of this feature. By default, gzip is used: # Use this to override the compression algorithm FIT_COMPRESSION ?= gzip quiet_cmd_fit = FIT $@ cmd_fit = $(MAKE_FIT) -o $@ --arch $(UIMAGE_ARCH) --os linux \ --name '$(UIMAGE_NAME)' \ $(if $(findstring 1,$(KBUILD_VERBOSE)),-v) \ $(if $(FIT_DECOMPOSE_DTBS),--decompose-dtbs) \ --compress $(FIT_COMPRESSION) -k $< @$(word 2,$^) Best regards, J. Neuschäfer
