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))) $(filter-out -fno-plt,$(call qstrip,$(CONFIG_EXTRA_OPTIMIZATION))) $(call qstrip,$(CONFIG_KERNEL_CFLAGS))" \
 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         KBUILD_HOSTLDFLAGS="-L$(STAGING_DIR_HOST)/lib" \
 114         CONFIG_SHELL="$(BASH)" \
 115         $(if $(findstring c,$(OPENWRT_VERBOSE)),V=1,V='') \
 116         $(if $(PKG_BUILD_ID),LDFLAGS_MODULE=--build-id=0x$(PKG_BUILD_ID)) \
 117         cmd_syscalls= \
 118         $(if $(__package_mk),KBUILD_EXTRA_SYMBOLS="$(wildcard $(PKG_SYMVERS_DIR)/*.symvers)")
 119
 120 KERNEL_NOSTDINC_FLAGS = \
 121         -nostdinc $(if $(DUMP),, -isystem $(shell $(TARGET_CC) -print-file-name=include))
 122
 123 ifeq ($(call qstrip,$(CONFIG_EXTERNAL_KERNEL_TREE))$(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI)),)
 124   KERNEL_MAKE_FLAGS += \
 125         KERNELRELEASE=$(LINUX_VERSION)
 126 endif
 127
 128 KERNEL_MAKEOPTS := -C $(LINUX_DIR) $(KERNEL_MAKE_FLAGS)
 129
 130 ifdef CONFIG_USE_SPARSE
 131   KERNEL_MAKEOPTS += C=1 CHECK=$(STAGING_DIR_HOST)/bin/sparse
 132 endif
 133
 134 ifneq ($(HOST_OS),Linux)
 135   KERNEL_MAKEOPTS += CONFIG_STACK_VALIDATION=
 136   export SKIP_STACK_VALIDATION:=1
 137 endif
 138
 139 PKG_EXTMOD_SUBDIRS ?= .
 140
 141 PKG_SYMVERS_DIR = $(KERNEL_BUILD_DIR)/symvers
 142
 143 define collect_module_symvers
 144         for subdir in $(PKG_EXTMOD_SUBDIRS); do \
 145                 realdir=$$$$(readlink -f $(PKG_BUILD_DIR)); \
 146                 grep -F $(PKG_BUILD_DIR) $(PKG_BUILD_DIR)/$$$$subdir/Module.symvers >> $(PKG_BUILD_DIR)/Module.symvers.tmp; \
 147                 [ "$(PKG_BUILD_DIR)" = "$$$$realdir" ] || \
 148                         grep -F $$$$realdir $(PKG_BUILD_DIR)/$$$$subdir/Module.symvers >> $(PKG_BUILD_DIR)/Module.symvers.tmp; \
 149         done; \
 150         sort -u $(PKG_BUILD_DIR)/Module.symvers.tmp > $(PKG_BUILD_DIR)/Module.symvers; \
 151         mkdir -p $(PKG_SYMVERS_DIR); \
 152         mv $(PKG_BUILD_DIR)/Module.symvers $(PKG_SYMVERS_DIR)/$(PKG_NAME).symvers
 153 endef
 154
 155 define KernelPackage/hooks
 156   ifneq ($(PKG_NAME),kernel)
 157     Hooks/Compile/Post += collect_module_symvers
 158   endif
 159   define KernelPackage/hooks
 160   endef
 161 endef
 162
 163 define KernelPackage/Defaults
 164   FILES:=
 165   AUTOLOAD:=
 166   MODPARAMS:=
 167   PKGFLAGS+=nonshared
 168 endef
 169
 170 # 1: name
 171 # 2: install prefix
 172 # 3: module priority prefix
 173 # 4: required for boot
 174 # 5: module list
 175 define ModuleAutoLoad
 176   $(if $(5), \
 177     mkdir -p $(2)/etc/modules.d; \
 178     ($(foreach mod,$(5), \
 179       echo "$(mod)$(if $(MODPARAMS.$(mod)), $(MODPARAMS.$(mod)),$(if $(MODPARAMS), $(MODPARAMS)))"; )) > $(2)/etc/modules.d/$(3)$(1); \
 180     $(if $(4), \
 181       mkdir -p $(2)/etc/modules-boot.d; \
 182       ln -sf ../modules.d/$(3)$(1) $(2)/etc/modules-boot.d/;))
 183 endef
 184
 185 ifeq ($(DUMP)$(TARGET_BUILD),)
 186   -include $(LINUX_DIR)/.config
 187 endif
 188
 189 define KernelPackage/depends
 190   $(STAMP_BUILT): $(LINUX_DIR)/.config
 191   define KernelPackage/depends
 192   endef
 193 endef
 194
 195 define KernelPackage
 196   NAME:=$(1)
 197   $(eval $(call Package/Default))
 198   $(eval $(call KernelPackage/Defaults))
 199   $(eval $(call KernelPackage/$(1)))
 200   $(eval $(call KernelPackage/$(1)/$(BOARD)))
 201   $(eval $(call KernelPackage/$(1)/$(BOARD)/$(if $(SUBTARGET),$(SUBTARGET),generic)))
 202
 203   define Package/kmod-$(1)
 204     TITLE:=$(TITLE)
 205     SECTION:=kernel
 206     CATEGORY:=Kernel modules
 207     DESCRIPTION:=$(DESCRIPTION)
 208     EXTRA_DEPENDS:=kernel (=$(LINUX_VERSION)-$(LINUX_RELEASE)-$(LINUX_VERMAGIC))
 209     VERSION:=$(LINUX_VERSION)$(if $(PKG_VERSION),+$(PKG_VERSION))-$(if $(PKG_RELEASE),$(PKG_RELEASE),$(LINUX_RELEASE))
 210     PKGFLAGS:=$(PKGFLAGS)
 211     $(call KernelPackage/$(1))
 212     $(call KernelPackage/$(1)/$(BOARD))
 213     $(call KernelPackage/$(1)/$(BOARD)/$(if $(SUBTARGET),$(SUBTARGET),generic))
 214   endef
 215
 216   ifdef KernelPackage/$(1)/conffiles
 217     define Package/kmod-$(1)/conffiles
 218 $(call KernelPackage/$(1)/conffiles)
 219     endef
 220   endif
 221
 222   ifdef KernelPackage/$(1)/description
 223     define Package/kmod-$(1)/description
 224 $(call KernelPackage/$(1)/description)
 225     endef
 226   endif
 227
 228   ifdef KernelPackage/$(1)/config
 229     define Package/kmod-$(1)/config
 230 $(call KernelPackage/$(1)/config)
 231     endef
 232   endif
 233
 234   $(call KernelPackage/depends)
 235   $(call KernelPackage/hooks)
 236
 237   ifneq ($(if $(filter-out %=y %=n %=m,$(KCONFIG)),$(filter m y,$(foreach c,$(filter-out %=y %=n %=m,$(KCONFIG)),$($(c)))),.),)
 238     define Package/kmod-$(1)/install
 239                   @for mod in $$(call version_filter,$$(FILES)); do \
 240                         if grep -q "$$$$$$$${mod##$(LINUX_DIR)/}" "$(LINUX_DIR)/modules.builtin"; then \
 241                                 echo "NOTICE: module '$$$$$$$$mod' is built-in."; \
 242                         elif [ -e $$$$$$$$mod ]; then \
 243                                 mkdir -p $$(1)/$(MODULES_SUBDIR) ; \
 244                                 $(CP) -L $$$$$$$$mod $$(1)/$(MODULES_SUBDIR)/ ; \
 245                         else \
 246                                 echo "ERROR: module '$$$$$$$$mod' is missing." >&2; \
 247                                 exit 1; \
 248                         fi; \
 249                   done;
 250                   $(call ModuleAutoLoad,$(1),$$(1),$(filter-out 0-,$(word 1,$(AUTOLOAD))-),$(filter-out 0,$(word 2,$(AUTOLOAD))),$(sort $(wordlist 3,99,$(AUTOLOAD))))
 251                   $(call KernelPackage/$(1)/install,$$(1))
 252     endef
 253   $(if $(CONFIG_PACKAGE_kmod-$(1)),
 254     else
 255       compile: $(1)-disabled
 256       $(1)-disabled:
 257                 @echo "WARNING: kmod-$(1) is not available in the kernel config - generating empty package" >&2
 258
 259       define Package/kmod-$(1)/install
 260                 true
 261       endef
 262   )
 263   endif
 264   $$(eval $$(call BuildPackage,kmod-$(1)))
 265
 266   $$(IPKG_kmod-$(1)): $$(wildcard $$(call version_filter,$$(FILES)))
 267
 268 endef
 269
 270 version_filter=$(if $(findstring @,$(1)),$(shell $(SCRIPT_DIR)/package-metadata.pl version_filter $(KERNEL_PATCHVER) $(1)),$(1))
 271
 272 # 1: priority (optional)
 273 # 2: module list
 274 # 3: boot flag
 275 define AutoLoad
 276   $(if $(1),$(1),0) $(if $(3),1,0) $(call version_filter,$(2))
 277 endef
 278
 279 # 1: module list
 280 # 2: boot flag
 281 define AutoProbe
 282   $(call AutoLoad,,$(1),$(2))
 283 endef
 284
 285 version_field=$(if $(word $(1),$(2)),$(word $(1),$(2)),0)
 286 kernel_version_merge=$$(( ($(call version_field,1,$(1)) << 24) + ($(call version_field,2,$(1)) << 16) + ($(call version_field,3,$(1)) << 8) + $(call version_field,4,$(1)) ))
 287
 288 ifdef DUMP
 289   kernel_version_cmp=
 290 else
 291   kernel_version_cmp=$(shell [ $(call kernel_version_merge,$(call split_version,$(2))) $(1) $(call kernel_version_merge,$(call split_version,$(3))) ] && echo 1 )
 292 endif
 293
 294 CompareKernelPatchVer=$(if $(call kernel_version_cmp,-$(2),$(1),$(3)),1,0)
 295
 296 kernel_patchver_gt=$(call kernel_version_cmp,-gt,$(KERNEL_PATCHVER),$(1))
 297 kernel_patchver_ge=$(call kernel_version_cmp,-ge,$(KERNEL_PATCHVER),$(1))
 298 kernel_patchver_eq=$(call kernel_version_cmp,-eq,$(KERNEL_PATCHVER),$(1))
 299 kernel_patchver_le=$(call kernel_version_cmp,-le,$(KERNEL_PATCHVER),$(1))
 300 kernel_patchver_lt=$(call kernel_version_cmp,-lt,$(KERNEL_PATCHVER),$(1))
 301