ee1928bbd1
Add support to install the modules.order file for external modules
during module_install in order to retain the Makefile ordering
of external modules. This helps reduce the extra steps necessary to
properly order loading of external modules when there are multiple
kernel modules compiled within a given KBUILD_EXTMOD directory.
To handle compiling multiple external modules within the same
INSTALL_MOD_DIR, kbuild will append a suffix to the installed
modules.order file defined like so:
echo ${KBUILD_EXTMOD} | sed 's:[./_]:_:g'
Ex:
KBUILD_EXTMOD=/mnt/a.b/c-d/my_driver results in:
modules.order._mnt_a_b_c_d_my_driver
The installed module.order.$(extmod_suffix) files can then be cat'd
together to create a single modules.order file which would define the
order to load all of the modules during boot.
Link: https://lore.kernel.org/all/20211215172349.388497-1-willmcvicker@google.com/
Bug: 210713925
Signed-off-by: Will McVicker <willmcvicker@google.com>
Change-Id: I3c23098d551ef17427436feee78bfddc9f9d36c6
125 lines
2.7 KiB
Makefile
125 lines
2.7 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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# ==========================================================================
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# Installing modules
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# ==========================================================================
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PHONY := __modinst
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__modinst:
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include include/config/auto.conf
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include $(srctree)/scripts/Kbuild.include
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modules := $(sort $(shell cat $(MODORDER)))
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ifeq ($(KBUILD_EXTMOD),)
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dst := $(MODLIB)/kernel
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else
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INSTALL_MOD_DIR ?= extra
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dst := $(MODLIB)/$(INSTALL_MOD_DIR)
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endif
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suffix-y :=
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suffix-$(CONFIG_MODULE_COMPRESS_GZIP) := .gz
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suffix-$(CONFIG_MODULE_COMPRESS_XZ) := .xz
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suffix-$(CONFIG_MODULE_COMPRESS_ZSTD) := .zst
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modules := $(patsubst $(extmod_prefix)%, $(dst)/%$(suffix-y), $(modules))
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ifneq ($(KBUILD_EXTMOD),)
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extmod_suffix := $(subst /,_,$(subst .,_,$(subst -,_,$(KBUILD_EXTMOD))))
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modules += $(dst)/modules.order.$(extmod_suffix)
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endif
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__modinst: $(modules)
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@:
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quiet_cmd_none =
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cmd_none = :
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#
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# Installation
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#
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quiet_cmd_install = INSTALL $@
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cmd_install = mkdir -p $(dir $@); cp $< $@
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# Strip
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#
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# INSTALL_MOD_STRIP, if defined, will cause modules to be stripped after they
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# are installed. If INSTALL_MOD_STRIP is '1', then the default option
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# --strip-debug will be used. Otherwise, INSTALL_MOD_STRIP value will be used
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# as the options to the strip command.
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ifdef INSTALL_MOD_STRIP
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ifeq ($(INSTALL_MOD_STRIP),1)
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strip-option := --strip-debug
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else
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strip-option := $(INSTALL_MOD_STRIP)
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endif
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quiet_cmd_strip = STRIP $@
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cmd_strip = $(STRIP) $(strip-option) $@
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else
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quiet_cmd_strip =
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cmd_strip = :
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endif
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#
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# Signing
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# Don't stop modules_install even if we can't sign external modules.
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#
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ifeq ($(CONFIG_MODULE_SIG_ALL),y)
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quiet_cmd_sign = SIGN $@
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$(eval $(call config_filename,MODULE_SIG_KEY))
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cmd_sign = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 $@ \
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$(if $(KBUILD_EXTMOD),|| true)
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else
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quiet_cmd_sign :=
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cmd_sign := :
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endif
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ifeq ($(modules_sign_only),)
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$(dst)/%.ko: $(extmod_prefix)%.ko FORCE
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$(call cmd,install)
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$(call cmd,strip)
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$(call cmd,sign)
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ifneq ($(KBUILD_EXTMOD),)
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$(dst)/modules.order.$(extmod_suffix): $(MODORDER) FORCE
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$(call cmd,install)
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@sed -i "s:^$(KBUILD_EXTMOD):$(INSTALL_MOD_DIR):g" $@
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endif
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else
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$(dst)/%.ko: FORCE
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$(call cmd,sign)
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endif
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#
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# Compression
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#
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quiet_cmd_gzip = GZIP $@
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cmd_gzip = $(KGZIP) -n -f $<
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quiet_cmd_xz = XZ $@
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cmd_xz = $(XZ) --lzma2=dict=2MiB -f $<
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quiet_cmd_zstd = ZSTD $@
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cmd_zstd = $(ZSTD) -T0 --rm -f -q $<
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$(dst)/%.ko.gz: $(dst)/%.ko FORCE
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$(call cmd,gzip)
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$(dst)/%.ko.xz: $(dst)/%.ko FORCE
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$(call cmd,xz)
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$(dst)/%.ko.zst: $(dst)/%.ko FORCE
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$(call cmd,zstd)
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PHONY += FORCE
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FORCE:
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.PHONY: $(PHONY)
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