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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-11-23 01:56:43 +08:00

kbuild: create a list of all built DTB files

It is useful to have a list of all *.dtb and *.dtbo files generated
from the current build.

With this commit, 'make dtbs' creates arch/*/boot/dts/dtbs-list, which
lists the dtb(o) files created in the current build. It maintains the
order of the dtb-y additions in Makefiles although the order is not
important for DTBs. It is a (good) side effect through the reuse of the
modules.order rule.

Please note this list only includes the files directly added to dtb-y.

For example, consider this case:

    foo-dtbs := foo_base.dtb foo_overlay.dtbo
    dtb-y := foo.dtb

In this example, the list will include foo.dtb, but not foo_base.dtb
or foo_overlay.dtbo.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Masahiro Yamada 2024-01-09 21:07:34 +09:00
parent f6314b76d8
commit 24507871c3
4 changed files with 21 additions and 10 deletions

1
.gitignore vendored
View File

@ -52,6 +52,7 @@
*.xz
*.zst
Module.symvers
dtbs-list
modules.order
#

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@ -1393,7 +1393,7 @@ ifneq ($(dtstree),)
PHONY += dtbs dtbs_prepare dtbs_install dtbs_check
dtbs: dtbs_prepare
$(Q)$(MAKE) $(build)=$(dtstree)
$(Q)$(MAKE) $(build)=$(dtstree) need-dtbslist=1
# include/config/kernel.release is actually needed when installing DTBs because
# INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make
@ -1932,7 +1932,7 @@ clean: $(clean-dirs)
-o -name '*.ko.*' \
-o -name '*.dtb' -o -name '*.dtbo' \
-o -name '*.dtb.S' -o -name '*.dtbo.S' \
-o -name '*.dt.yaml' \
-o -name '*.dt.yaml' -o -name 'dtbs-list' \
-o -name '*.dwo' -o -name '*.lst' \
-o -name '*.su' -o -name '*.mod' \
-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \

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@ -71,6 +71,7 @@ endif
# subdir-builtin and subdir-modorder may contain duplications. Use $(sort ...)
subdir-builtin := $(sort $(filter %/built-in.a, $(real-obj-y)))
subdir-modorder := $(sort $(filter %/modules.order, $(obj-m)))
subdir-dtbslist := $(sort $(filter %/dtbs-list, $(dtb-y)))
targets-for-builtin := $(extra-y)
@ -388,6 +389,7 @@ $(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler
# To build objects in subdirs, we need to descend into the directories
$(subdir-builtin): $(obj)/%/built-in.a: $(obj)/% ;
$(subdir-modorder): $(obj)/%/modules.order: $(obj)/% ;
$(subdir-dtbslist): $(obj)/%/dtbs-list: $(obj)/% ;
#
# Rule to compile a set of .o files into one .a file (without symbol table)
@ -404,19 +406,21 @@ $(obj)/built-in.a: $(real-obj-y) FORCE
$(call if_changed,ar_builtin)
#
# Rule to create modules.order file
# Rule to create modules.order and dtbs-list
#
# Create commands to either record .ko file or cat modules.order from
# a subdirectory
# Add $(obj-m) as the prerequisite to avoid updating the timestamp of
# modules.order unless contained modules are updated.
# This is a list of build artifacts (module or dtb) from the current Makefile
# and its sub-directories. The timestamp should be updated when any of the
# member files.
cmd_modules_order = { $(foreach m, $(real-prereqs), \
$(if $(filter %/modules.order, $m), cat $m, echo $m);) :; } \
cmd_gen_order = { $(foreach m, $(real-prereqs), \
$(if $(filter %/$(notdir $@), $m), cat $m, echo $m);) :; } \
> $@
$(obj)/modules.order: $(obj-m) FORCE
$(call if_changed,modules_order)
$(call if_changed,gen_order)
$(obj)/dtbs-list: $(dtb-y) FORCE
$(call if_changed,gen_order)
#
# Rule to compile a set of .o files into one .a file (with symbol table)

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@ -45,6 +45,11 @@ else
obj-y := $(filter-out %/, $(obj-y))
endif
ifdef need-dtbslist
dtb-y += $(addsuffix /dtbs-list, $(subdir-ym))
always-y += dtbs-list
endif
# Expand $(foo-objs) $(foo-y) etc. by replacing their individuals
suffix-search = $(strip $(foreach s, $3, $($(1:%$(strip $2)=%$s))))
# List composite targets that are constructed by combining other targets
@ -99,6 +104,7 @@ lib-y := $(addprefix $(obj)/,$(lib-y))
real-obj-y := $(addprefix $(obj)/,$(real-obj-y))
real-obj-m := $(addprefix $(obj)/,$(real-obj-m))
multi-obj-m := $(addprefix $(obj)/, $(multi-obj-m))
dtb-y := $(addprefix $(obj)/, $(dtb-y))
multi-dtb-y := $(addprefix $(obj)/, $(multi-dtb-y))
real-dtb-y := $(addprefix $(obj)/, $(real-dtb-y))
subdir-ym := $(addprefix $(obj)/,$(subdir-ym))