1# SPDX-License-Identifier: GPL-2.0
2# ==========================================================================
3# Installing modules
4# ==========================================================================
5
6PHONY := __modinst
7__modinst:
8
9include include/config/auto.conf
10include $(srctree)/scripts/Kbuild.include
11
12install-y :=
13
14ifeq ($(KBUILD_EXTMOD)$(sign-only),)
15
16# remove the old directory and symlink
17$(shell rm -fr $(MODLIB)/kernel $(MODLIB)/build)
18
19install-$(CONFIG_MODULES) += $(addprefix $(MODLIB)/, build modules.order)
20
21$(MODLIB)/build: FORCE
22	$(call cmd,symlink)
23
24quiet_cmd_symlink = SYMLINK $@
25      cmd_symlink = ln -s $(CURDIR) $@
26
27$(MODLIB)/modules.order: modules.order FORCE
28	$(call cmd,install_modorder)
29
30quiet_cmd_install_modorder = INSTALL $@
31      cmd_install_modorder = sed 's:^\(.*\)\.o$$:kernel/\1.ko:' $< > $@
32
33# Install modules.builtin(.modinfo,.ranges) even when CONFIG_MODULES is disabled.
34install-y += $(addprefix $(MODLIB)/, modules.builtin modules.builtin.modinfo)
35
36install-$(CONFIG_BUILTIN_MODULE_RANGES) += $(MODLIB)/modules.builtin.ranges
37
38$(addprefix $(MODLIB)/, modules.builtin modules.builtin.modinfo modules.builtin.ranges): $(MODLIB)/%: % FORCE
39	$(call cmd,install)
40
41endif
42
43modules := $(call read-file, $(MODORDER))
44
45ifeq ($(KBUILD_EXTMOD),)
46dst := $(MODLIB)/kernel
47else
48INSTALL_MOD_DIR ?= updates
49dst := $(MODLIB)/$(INSTALL_MOD_DIR)
50endif
51
52$(foreach x, % :, $(if $(findstring $x, $(dst)), \
53	$(error module installation path cannot contain '$x')))
54
55suffix-y				:=
56ifdef CONFIG_MODULE_COMPRESS_ALL
57suffix-$(CONFIG_MODULE_COMPRESS_GZIP)	:= .gz
58suffix-$(CONFIG_MODULE_COMPRESS_XZ)	:= .xz
59suffix-$(CONFIG_MODULE_COMPRESS_ZSTD)	:= .zst
60endif
61
62modules := $(patsubst $(extmod_prefix)%.o, $(dst)/%.ko$(suffix-y), $(modules))
63install-$(CONFIG_MODULES) += $(modules)
64
65__modinst: $(install-y)
66	@:
67
68#
69# Installation
70#
71quiet_cmd_install = INSTALL $@
72      cmd_install = cp $< $@
73
74# Strip
75#
76# INSTALL_MOD_STRIP, if defined, will cause modules to be stripped after they
77# are installed. If INSTALL_MOD_STRIP is '1', then the default option
78# --strip-debug will be used. Otherwise, INSTALL_MOD_STRIP value will be used
79# as the options to the strip command.
80ifdef INSTALL_MOD_STRIP
81
82ifeq ($(INSTALL_MOD_STRIP),1)
83strip-option := --strip-debug
84else
85strip-option := $(INSTALL_MOD_STRIP)
86endif
87
88quiet_cmd_strip = STRIP   $@
89      cmd_strip = $(STRIP) $(strip-option) $@
90
91else
92
93quiet_cmd_strip =
94      cmd_strip = :
95
96endif
97
98#
99# Signing
100# Don't stop modules_install even if we can't sign external modules.
101#
102ifeq ($(filter pkcs11:%, $(CONFIG_MODULE_SIG_KEY)),)
103sig-key := $(if $(wildcard $(CONFIG_MODULE_SIG_KEY)),,$(srctree)/)$(CONFIG_MODULE_SIG_KEY)
104else
105sig-key := $(CONFIG_MODULE_SIG_KEY)
106endif
107quiet_cmd_sign = SIGN    $@
108      cmd_sign = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) "$(sig-key)" certs/signing_key.x509 $@ \
109                 $(if $(KBUILD_EXTMOD),|| true)
110
111ifeq ($(sign-only),)
112
113# During modules_install, modules are signed only when CONFIG_MODULE_SIG_ALL=y.
114ifndef CONFIG_MODULE_SIG_ALL
115quiet_cmd_sign :=
116      cmd_sign := :
117endif
118
119# Create necessary directories
120$(foreach dir, $(sort $(dir $(install-y))), $(shell mkdir -p $(dir)))
121
122$(dst)/%.ko: $(extmod_prefix)%.ko FORCE
123	$(call cmd,install)
124	$(call cmd,strip)
125	$(call cmd,sign)
126
127ifdef CONFIG_MODULES
128__modinst: depmod
129
130PHONY += depmod
131depmod: $(install-y)
132	$(call cmd,depmod)
133
134quiet_cmd_depmod = DEPMOD  $(MODLIB)
135      cmd_depmod = $(srctree)/scripts/depmod.sh $(KERNELRELEASE)
136endif
137
138else
139
140$(dst)/%.ko: FORCE
141	$(call cmd,sign)
142
143endif
144
145#
146# Compression
147#
148quiet_cmd_gzip = GZIP    $@
149      cmd_gzip = $(KGZIP) -n -f $<
150quiet_cmd_xz = XZ      $@
151      cmd_xz = $(XZ) --check=crc32 --lzma2=dict=1MiB -f $<
152quiet_cmd_zstd = ZSTD    $@
153      cmd_zstd = $(ZSTD) --rm -f -q $<
154
155$(dst)/%.ko.gz: $(dst)/%.ko FORCE
156	$(call cmd,gzip)
157
158$(dst)/%.ko.xz: $(dst)/%.ko FORCE
159	$(call cmd,xz)
160
161$(dst)/%.ko.zst: $(dst)/%.ko FORCE
162	$(call cmd,zstd)
163
164PHONY += FORCE
165FORCE:
166
167.PHONY: $(PHONY)
168