include/kernel.mk

   1 # SPDX-License-Identifier: GPL-2.0-only
   2 #
   3 # Copyright (C) 2006-2020 OpenWrt.org
   4
   5 ifneq ($(filter check,$(MAKECMDGOALS)),)
   6 CHECK:=1
   7 DUMP:=1
   8 endif
   9
  10 ifneq ($(SOURCE_DATE_EPOCH),)
  11   ifndef DUMP
  12     KBUILD_BUILD_TIMESTAMP:=$(shell perl -e 'print scalar gmtime($(SOURCE_DATE_EPOCH))')
  13   endif
  14 endif
  15
  16 ifeq ($(__target_inc),)
  17   ifndef CHECK
  18     include $(INCLUDE_DIR)/target.mk
  19   endif
  20 endif
  21
  22 ifeq ($(DUMP),1)
  23   KERNEL?=<KERNEL>
  24   BOARD?=<BOARD>
  25   LINUX_VERSION?=<LINUX_VERSION>
  26   LINUX_VERMAGIC?=<LINUX_VERMAGIC>
  27 else
  28   ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
  29     export GCC_HONOUR_COPTS=s
  30   endif
  31
  32   LINUX_KMOD_SUFFIX=ko
  33
  34   ifneq (,$(findstring uml,$(BOARD)))
  35     KERNEL_CC?=$(HOSTCC)
  36     KERNEL_CROSS?=
  37   else
  38     KERNEL_CC?=$(TARGET_CC)
  39     KERNEL_CROSS?=$(TARGET_CROSS)
  40   endif
  41
  42   ifeq ($(TARGET_BUILD),1)
  43     PATCH_DIR ?= $(CURDIR)/patches$(if $(wildcard ./patches-$(KERNEL_PATCHVER)),-$(KERNEL_PATCHVER))
  44     FILES_DIR ?= $(foreach dir,$(wildcard $(CURDIR)/files $(CURDIR)/files-$(KERNEL_PATCHVER)),"$(dir)")
  45   endif
  46   KERNEL_BUILD_DIR ?= $(BUILD_DIR)/linux-$(BOARD)$(if $(SUBTARGET),_$(SUBTARGET))
  47   LINUX_DIR ?= $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)
  48   LINUX_UAPI_DIR=uapi/
  49   LINUX_VERMAGIC:=$(strip $(shell cat $(LINUX_DIR)/.vermagic 2>/dev/null))
  50   LINUX_VERMAGIC:=$(if $(LINUX_VERMAGIC),$(LINUX_VERMAGIC),unknown)
  51
  52   LINUX_UNAME_VERSION:=$(KERNEL_BASE)
  53   ifneq ($(findstring -rc,$(LINUX_VERSION)),)
  54     LINUX_UNAME_VERSION:=$(LINUX_UNAME_VERSION)-$(strip $(lastword $(subst -, ,$(LINUX_VERSION))))
  55   endif
  56
  57   LINUX_KERNEL:=$(KERNEL_BUILD_DIR)/vmlinux
  58
  59   ifneq (,$(findstring -rc,$(LINUX_VERSION)))
  60       LINUX_SOURCE:=linux-$(LINUX_VERSION).tar.gz
  61   else
  62       LINUX_SOURCE:=linux-$(LINUX_VERSION).tar.xz
  63   endif
  64
  65   ifneq (,$(findstring -rc,$(LINUX_VERSION)))
  66       LINUX_SITE:=https://git.kernel.org/torvalds/t
  67   else ifeq ($(call qstrip,$(CONFIG_EXTERNAL_KERNEL_TREE))$(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI)),)
  68       LINUX_SITE:=@KERNEL/linux/kernel/v$(word 1,$(subst ., ,$(KERNEL_BASE))).x
  69   else
  70       LINUX_UNAME_VERSION:=$(strip $(shell cat $(LINUX_DIR)/include/config/kernel.release 2>/dev/null))
  71   endif
  72
  73   MODULES_SUBDIR:=lib/modules/$(LINUX_UNAME_VERSION)
  74   TARGET_MODULES_DIR:=$(LINUX_TARGET_DIR)/$(MODULES_SUBDIR)
  75
  76   ifneq ($(TARGET_BUILD),1)
  77     PKG_BUILD_DIR ?= $(KERNEL_BUILD_DIR)/$(if $(BUILD_VARIANT),$(PKG_NAME)-$(BUILD_VARIANT)/)$(PKG_NAME)$(if $(PKG_VERSION),-$(PKG_VERSION))
  78   endif
  79 endif
  80
  81 ifneq (,$(findstring uml,$(BOARD)))
  82   LINUX_KARCH=um
  83 else ifneq (,$(findstring $(ARCH) , aarch64 aarch64_be ))
  84   LINUX_KARCH := arm64
  85 else ifneq (,$(findstring $(ARCH) , arceb ))
  86   LINUX_KARCH := arc
  87 else ifneq (,$(findstring $(ARCH) , armeb ))
  88   LINUX_KARCH := arm
  89 else ifneq (,$(findstring $(ARCH) , mipsel mips64 mips64el ))
  90   LINUX_KARCH := mips
  91 else ifneq (,$(findstring $(ARCH) , powerpc64 ))
  92   LINUX_KARCH := powerpc
  93 else ifneq (,$(findstring $(ARCH) , sh2 sh3 sh4 ))
  94   LINUX_KARCH := sh
  95 else ifneq (,$(findstring $(ARCH) , i386 x86_64 ))
  96   LINUX_KARCH := x86
  97 else
  98   LINUX_KARCH := $(ARCH)
  99 endif
 100
 101 KERNEL_MAKE = $(MAKE) $(KERNEL_MAKEOPTS)
 102
 103 KERNEL_MAKE_FLAGS = \
 104         KCFLAGS="$(call iremap,$(BUILD_DIR),$(notdir $(BUILD_DIR)))" \
 105         HOSTCFLAGS="$(HOST_CFLAGS) -Wall -Wmissing-prototypes -Wstrict-prototypes" \
 106         CROSS_COMPILE="$(KERNEL_CROSS)" \
 107         ARCH="$(LINUX_KARCH)" \
 108         KBUILD_HAVE_NLS=no \
 109         KBUILD_BUILD_USER="$(call qstrip,$(CONFIG_KERNEL_BUILD_USER))" \
 110         KBUILD_BUILD_HOST="$(call qstrip,$(CONFIG_KERNEL_BUILD_DOMAIN))" \
 111         KBUILD_BUILD_TIMESTAMP="$(KBUILD_BUILD_TIMESTAMP)" \
 112         KBUILD_BUILD_VERSION="0" \
 113         HOST_LOADLIBES="-L$(STAGING_DIR_HOST)/lib" \
 114         KBUILD_HOSTLDLIBS="-L$(STAGING_DIR_HOST)/lib" \
 115         CONFIG_SHELL="$(BASH)" \
 116         $(if $(findstring c,$(OPENWRT_VERBOSE)),V=1,V='') \
 117         $(if $(PKG_BUILD_ID),LDFLAGS_MODULE=--build-id=0x$(PKG_BUILD_ID)) \
 118         cmd_syscalls= \
 119         $(if $(__package_mk),KBUILD_EXTRA_SYMBOLS="$(wildcard $(PKG_SYMVERS_DIR)/*.symvers)")
 120
 121 KERNEL_NOSTDINC_FLAGS = \
 122         -nostdinc $(if $(DUMP),, -isystem $(shell $(TARGET_CC) -print-file-name=include))
 123
 124 ifeq ($(call qstrip,$(CONFIG_EXTERNAL_KERNEL_TREE))$(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI)),)
 125   KERNEL_MAKE_FLAGS += \
 126         KERNELRELEASE=$(LINUX_VERSION)
 127 endif
 128
 129 KERNEL_MAKEOPTS := -C $(LINUX_DIR) $(KERNEL_MAKE_FLAGS)
 130
 131 ifdef CONFIG_USE_SPARSE
 132   KERNEL_MAKEOPTS += C=1 CHECK=$(STAGING_DIR_HOST)/bin/sparse
 133 endif
 134
 135 ifneq ($(HOST_OS),Linux)
 136   KERNEL_MAKEOPTS += CONFIG_STACK_VALIDATION=
 137   export SKIP_STACK_VALIDATION:=1
 138 endif
 139
 140 PKG_EXTMOD_SUBDIRS ?= .
 141
 142 PKG_SYMVERS_DIR = $(KERNEL_BUILD_DIR)/symvers
 143
 144 define collect_module_symvers
 145         for subdir in $(PKG_EXTMOD_SUBDIRS); do \
 146                 realdir=$$$$(readlink -f $(PKG_BUILD_DIR)); \
 147                 grep -F $(PKG_BUILD_DIR) $(PKG_BUILD_DIR)/$$$$subdir/Module.symvers >> $(PKG_BUILD_DIR)/Module.symvers.tmp; \
 148                 [ "$(PKG_BUILD_DIR)" = "$$$$realdir" ] || \
 149                         grep -F $$$$realdir $(PKG_BUILD_DIR)/$$$$subdir/Module.symvers >> $(PKG_BUILD_DIR)/Module.symvers.tmp; \
 150         done; \
 151         sort -u $(PKG_BUILD_DIR)/Module.symvers.tmp > $(PKG_BUILD_DIR)/Module.symvers; \
 152         mkdir -p $(PKG_SYMVERS_DIR); \
 153         mv $(PKG_BUILD_DIR)/Module.symvers $(PKG_SYMVERS_DIR)/$(PKG_NAME).symvers
 154 endef
 155
 156 define KernelPackage/hooks
 157   ifneq ($(PKG_NAME),kernel)
 158     Hooks/Compile/Post += collect_module_symvers
 159   endif
 160   define KernelPackage/hooks
 161   endef
 162 endef
 163
 164 define KernelPackage/Defaults
 165   FILES:=
 166   AUTOLOAD:=
 167   MODPARAMS:=
 168   PKGFLAGS+=nonshared
 169 endef
 170
 171 # 1: name
 172 # 2: install prefix
 173 # 3: module priority prefix
 174 # 4: required for boot
 175 # 5: module list
 176 define ModuleAutoLoad
 177   $(if $(5), \
 178     mkdir -p $(2)/etc/modules.d; \
 179     ($(foreach mod,$(5), \
 180       echo "$(mod)$(if $(MODPARAMS.$(mod)), $(MODPARAMS.$(mod)),$(if $(MODPARAMS), $(MODPARAMS)))"; )) > $(2)/etc/modules.d/$(3)$(1); \
 181     $(if $(4), \
 182       mkdir -p $(2)/etc/modules-boot.d; \
 183       ln -sf ../modules.d/$(3)$(1) $(2)/etc/modules-boot.d/;))
 184 endef
 185
 186 ifeq ($(DUMP)$(TARGET_BUILD),)
 187   -include $(LINUX_DIR)/.config
 188 endif
 189
 190 define KernelPackage/depends
 191   $(STAMP_BUILT): $(LINUX_DIR)/.config
 192   define KernelPackage/depends
 193   endef
 194 endef
 195
 196 define KernelPackage
 197   NAME:=$(1)
 198   $(eval $(call Package/Default))
 199   $(eval $(call KernelPackage/Defaults))
 200   $(eval $(call KernelPackage/$(1)))
 201   $(eval $(call KernelPackage/$(1)/$(BOARD)))
 202   $(eval $(call KernelPackage/$(1)/$(BOARD)/$(if $(SUBTARGET),$(SUBTARGET),generic)))
 203
 204   define Package/kmod-$(1)
 205     TITLE:=$(TITLE)
 206     SECTION:=kernel
 207     CATEGORY:=Kernel modules
 208     DESCRIPTION:=$(DESCRIPTION)
 209     EXTRA_DEPENDS:=kernel (=$(LINUX_VERSION)-$(LINUX_RELEASE)-$(LINUX_VERMAGIC))
 210     VERSION:=$(LINUX_VERSION)$(if $(PKG_VERSION),+$(PKG_VERSION))-$(if $(PKG_RELEASE),$(PKG_RELEASE),$(LINUX_RELEASE))
 211     PKGFLAGS:=$(PKGFLAGS)
 212     $(call KernelPackage/$(1))
 213     $(call KernelPackage/$(1)/$(BOARD))
 214     $(call KernelPackage/$(1)/$(BOARD)/$(if $(SUBTARGET),$(SUBTARGET),generic))
 215   endef
 216
 217   ifdef KernelPackage/$(1)/conffiles
 218     define Package/kmod-$(1)/conffiles
 219 $(call KernelPackage/$(1)/conffiles)
 220     endef
 221   endif
 222
 223   ifdef KernelPackage/$(1)/description
 224     define Package/kmod-$(1)/description
 225 $(call KernelPackage/$(1)/description)
 226     endef
 227   endif
 228
 229   ifdef KernelPackage/$(1)/config
 230     define Package/kmod-$(1)/config
 231 $(call KernelPackage/$(1)/config)
 232     endef
 233   endif
 234
 235   $(call KernelPackage/depends)
 236   $(call KernelPackage/hooks)
 237
 238   ifneq ($(if $(filter-out %=y %=n %=m,$(KCONFIG)),$(filter m y,$(foreach c,$(filter-out %=y %=n %=m,$(KCONFIG)),$($(c)))),.),)
 239     define Package/kmod-$(1)/install
 240                   @for mod in $$(call version_filter,$$(FILES)); do \
 241                         if grep -q "$$$$$$$${mod##$(LINUX_DIR)/}" "$(LINUX_DIR)/modules.builtin"; then \
 242                                 echo "NOTICE: module '$$$$$$$$mod' is built-in."; \
 243                         elif [ -e $$$$$$$$mod ]; then \
 244                                 mkdir -p $$(1)/$(MODULES_SUBDIR) ; \
 245                                 $(CP) -L $$$$$$$$mod $$(1)/$(MODULES_SUBDIR)/ ; \
 246                         else \
 247                                 echo "ERROR: module '$$$$$$$$mod' is missing." >&2; \
 248                                 exit 1; \
 249                         fi; \
 250                   done;
 251                   $(call ModuleAutoLoad,$(1),$$(1),$(filter-out 0-,$(word 1,$(AUTOLOAD))-),$(filter-out 0,$(word 2,$(AUTOLOAD))),$(sort $(wordlist 3,99,$(AUTOLOAD))))
 252                   $(call KernelPackage/$(1)/install,$$(1))
 253     endef
 254   $(if $(CONFIG_PACKAGE_kmod-$(1)),
 255     else
 256       compile: $(1)-disabled
 257       $(1)-disabled:
 258                 @echo "WARNING: kmod-$(1) is not available in the kernel config - generating empty package" >&2
 259
 260       define Package/kmod-$(1)/install
 261                 true
 262       endef
 263   )
 264   endif
 265   $$(eval $$(call BuildPackage,kmod-$(1)))
 266
 267   $$(IPKG_kmod-$(1)): $$(wildcard $$(call version_filter,$$(FILES)))
 268
 269 endef
 270
 271 version_filter=$(if $(findstring @,$(1)),$(shell $(SCRIPT_DIR)/package-metadata.pl version_filter $(KERNEL_PATCHVER) $(1)),$(1))
 272
 273 # 1: priority (optional)
 274 # 2: module list
 275 # 3: boot flag
 276 define AutoLoad
 277   $(if $(1),$(1),0) $(if $(3),1,0) $(call version_filter,$(2))
 278 endef
 279
 280 # 1: module list
 281 # 2: boot flag
 282 define AutoProbe
 283   $(call AutoLoad,,$(1),$(2))
 284 endef
 285
 286 version_field=$(if $(word $(1),$(2)),$(word $(1),$(2)),0)
 287 kernel_version_merge=$$(( ($(call version_field,1,$(1)) << 24) + ($(call version_field,2,$(1)) << 16) + ($(call version_field,3,$(1)) << 8) + $(call version_field,4,$(1)) ))
 288
 289 ifdef DUMP
 290   kernel_version_cmp=
 291 else
 292   kernel_version_cmp=$(shell [ $(call kernel_version_merge,$(call split_version,$(2))) $(1) $(call kernel_version_merge,$(call split_version,$(3))) ] && echo 1 )
 293 endif
 294
 295 CompareKernelPatchVer=$(if $(call kernel_version_cmp,-$(2),$(1),$(3)),1,0)
 296
 297 kernel_patchver_gt=$(call kernel_version_cmp,-gt,$(KERNEL_PATCHVER),$(1))
 298 kernel_patchver_ge=$(call kernel_version_cmp,-ge,$(KERNEL_PATCHVER),$(1))
 299 kernel_patchver_eq=$(call kernel_version_cmp,-eq,$(KERNEL_PATCHVER),$(1))
 300 kernel_patchver_le=$(call kernel_version_cmp,-le,$(KERNEL_PATCHVER),$(1))
 301 kernel_patchver_lt=$(call kernel_version_cmp,-lt,$(KERNEL_PATCHVER),$(1))
 302