linux.mk 22 KB

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  1. ################################################################################
  2. #
  3. # Linux kernel target
  4. #
  5. ################################################################################
  6. LINUX_VERSION = $(call qstrip,$(BR2_LINUX_KERNEL_VERSION))
  7. LINUX_LICENSE = GPL-2.0
  8. LINUX_LICENSE_FILES = COPYING
  9. define LINUX_HELP_CMDS
  10. @echo ' linux-menuconfig - Run Linux kernel menuconfig'
  11. @echo ' linux-savedefconfig - Run Linux kernel savedefconfig'
  12. @echo ' linux-update-defconfig - Save the Linux configuration to the path specified'
  13. @echo ' by BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE'
  14. endef
  15. # Compute LINUX_SOURCE and LINUX_SITE from the configuration
  16. ifeq ($(BR2_LINUX_KERNEL_CUSTOM_TARBALL),y)
  17. LINUX_TARBALL = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION))
  18. LINUX_SITE = $(patsubst %/,%,$(dir $(LINUX_TARBALL)))
  19. LINUX_SOURCE = $(notdir $(LINUX_TARBALL))
  20. else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_GIT),y)
  21. LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))
  22. LINUX_SITE_METHOD = git
  23. else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_HG),y)
  24. LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))
  25. LINUX_SITE_METHOD = hg
  26. else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_SVN),y)
  27. LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))
  28. LINUX_SITE_METHOD = svn
  29. else ifeq ($(BR2_LINUX_KERNEL_LATEST_CIP_VERSION),y)
  30. LINUX_SITE = git://git.kernel.org/pub/scm/linux/kernel/git/cip/linux-cip.git
  31. else ifneq ($(findstring -rc,$(LINUX_VERSION)),)
  32. # Since 4.12-rc1, -rc kernels are generated from cgit. This also works for
  33. # older -rc kernels.
  34. LINUX_SITE = https://git.kernel.org/torvalds/t
  35. else
  36. LINUX_SOURCE = linux-$(LINUX_VERSION).tar.xz
  37. # In X.Y.Z, get X and Y. We replace dots and dashes by spaces in order
  38. # to use the $(word) function. We support versions such as 4.0, 3.1,
  39. # 2.6.32, 2.6.32-rc1, 3.0-rc6, etc.
  40. ifeq ($(findstring x2.6.,x$(LINUX_VERSION)),x2.6.)
  41. LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v2.6
  42. else ifeq ($(findstring x3.,x$(LINUX_VERSION)),x3.)
  43. LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v3.x
  44. else ifeq ($(findstring x4.,x$(LINUX_VERSION)),x4.)
  45. LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v4.x
  46. endif
  47. endif
  48. ifeq ($(BR2_LINUX_KERNEL)$(BR2_LINUX_KERNEL_LATEST_VERSION),y)
  49. BR_NO_CHECK_HASH_FOR += $(LINUX_SOURCE)
  50. endif
  51. LINUX_PATCHES = $(call qstrip,$(BR2_LINUX_KERNEL_PATCH))
  52. # We have no way to know the hashes for user-supplied patches.
  53. BR_NO_CHECK_HASH_FOR += $(notdir $(LINUX_PATCHES))
  54. # We rely on the generic package infrastructure to download and apply
  55. # remote patches (downloaded from ftp, http or https). For local
  56. # patches, we can't rely on that infrastructure, because there might
  57. # be directories in the patch list (unlike for other packages).
  58. LINUX_PATCH = $(filter ftp://% http://% https://%,$(LINUX_PATCHES))
  59. LINUX_INSTALL_IMAGES = YES
  60. LINUX_DEPENDENCIES = host-kmod
  61. # Starting with 4.16, the generated kconfig paser code is no longer
  62. # shipped with the kernel sources, so we need flex and bison, but
  63. # only if the host does not have them.
  64. LINUX_KCONFIG_DEPENDENCIES = \
  65. $(BR2_BISON_HOST_DEPENDENCY) \
  66. $(BR2_FLEX_HOST_DEPENDENCY)
  67. # Starting with 4.18, the kconfig in the kernel calls the
  68. # cross-compiler to check its capabilities. So we need the
  69. # toolchain before we can call the configurators.
  70. LINUX_KCONFIG_DEPENDENCIES += toolchain
  71. # host tools needed for kernel compression
  72. ifeq ($(BR2_LINUX_KERNEL_LZ4),y)
  73. LINUX_DEPENDENCIES += host-lz4
  74. else ifeq ($(BR2_LINUX_KERNEL_LZMA),y)
  75. LINUX_DEPENDENCIES += host-lzma
  76. else ifeq ($(BR2_LINUX_KERNEL_LZO),y)
  77. LINUX_DEPENDENCIES += host-lzop
  78. else ifeq ($(BR2_LINUX_KERNEL_XZ),y)
  79. LINUX_DEPENDENCIES += host-xz
  80. endif
  81. LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_GZIP) += CONFIG_KERNEL_GZIP
  82. LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZ4) += CONFIG_KERNEL_LZ4
  83. LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZMA) += CONFIG_KERNEL_LZMA
  84. LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZO) += CONFIG_KERNEL_LZO
  85. LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_XZ) += CONFIG_KERNEL_XZ
  86. ifeq ($(BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL),y)
  87. LINUX_DEPENDENCIES += host-openssl
  88. endif
  89. ifeq ($(BR2_LINUX_KERNEL_NEEDS_HOST_LIBELF),y)
  90. LINUX_DEPENDENCIES += host-elfutils
  91. endif
  92. # If host-uboot-tools is selected by the user, assume it is needed to
  93. # create a custom image
  94. ifeq ($(BR2_PACKAGE_HOST_UBOOT_TOOLS),y)
  95. LINUX_DEPENDENCIES += host-uboot-tools
  96. endif
  97. ifneq ($(ARCH_XTENSA_OVERLAY_FILE),)
  98. define LINUX_XTENSA_OVERLAY_EXTRACT
  99. $(call arch-xtensa-overlay-extract,$(@D),linux)
  100. endef
  101. LINUX_POST_EXTRACT_HOOKS += LINUX_XTENSA_OVERLAY_EXTRACT
  102. LINUX_EXTRA_DOWNLOADS += $(ARCH_XTENSA_OVERLAY_URL)
  103. endif
  104. LINUX_MAKE_FLAGS = \
  105. HOSTCC="$(HOSTCC) $(HOST_CFLAGS) $(HOST_LDFLAGS)" \
  106. ARCH=$(KERNEL_ARCH) \
  107. INSTALL_MOD_PATH=$(TARGET_DIR) \
  108. CROSS_COMPILE="$(TARGET_CROSS)" \
  109. DEPMOD=$(HOST_DIR)/sbin/depmod
  110. LINUX_MAKE_ENV = \
  111. $(TARGET_MAKE_ENV) \
  112. BR_BINARIES_DIR=$(BINARIES_DIR)
  113. ifeq ($(BR2_REPRODUCIBLE),y)
  114. LINUX_MAKE_ENV += \
  115. KBUILD_BUILD_VERSION=1 \
  116. KBUILD_BUILD_USER=buildroot \
  117. KBUILD_BUILD_HOST=buildroot \
  118. KBUILD_BUILD_TIMESTAMP="$(shell LC_ALL=C date -d @$(SOURCE_DATE_EPOCH))"
  119. endif
  120. # gcc-8 started warning about function aliases that have a
  121. # non-matching prototype. This seems rather useful in general, but it
  122. # causes tons of warnings in the Linux kernel, where we rely on
  123. # abusing those aliases for system call entry points, in order to
  124. # sanitize the arguments passed from user space in registers.
  125. # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82435
  126. ifeq ($(BR2_TOOLCHAIN_GCC_AT_LEAST_8),y)
  127. LINUX_MAKE_ENV += KCFLAGS=-Wno-attribute-alias
  128. endif
  129. # Get the real Linux version, which tells us where kernel modules are
  130. # going to be installed in the target filesystem.
  131. LINUX_VERSION_PROBED = `$(MAKE) $(LINUX_MAKE_FLAGS) -C $(LINUX_DIR) --no-print-directory -s kernelrelease 2>/dev/null`
  132. LINUX_DTS_NAME += $(call qstrip,$(BR2_LINUX_KERNEL_INTREE_DTS_NAME))
  133. # We keep only the .dts files, so that the user can specify both .dts
  134. # and .dtsi files in BR2_LINUX_KERNEL_CUSTOM_DTS_PATH. Both will be
  135. # copied to arch/<arch>/boot/dts, but only the .dts files will
  136. # actually be generated as .dtb.
  137. LINUX_DTS_NAME += $(basename $(filter %.dts,$(notdir $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH)))))
  138. LINUX_DTBS = $(addsuffix .dtb,$(LINUX_DTS_NAME))
  139. ifeq ($(BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM),y)
  140. LINUX_IMAGE_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_IMAGE_NAME))
  141. LINUX_TARGET_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_IMAGE_TARGET_NAME))
  142. ifeq ($(LINUX_IMAGE_NAME),)
  143. LINUX_IMAGE_NAME = $(LINUX_TARGET_NAME)
  144. endif
  145. else
  146. ifeq ($(BR2_LINUX_KERNEL_UIMAGE),y)
  147. LINUX_IMAGE_NAME = uImage
  148. else ifeq ($(BR2_LINUX_KERNEL_APPENDED_UIMAGE),y)
  149. LINUX_IMAGE_NAME = uImage
  150. else ifeq ($(BR2_LINUX_KERNEL_BZIMAGE),y)
  151. LINUX_IMAGE_NAME = bzImage
  152. else ifeq ($(BR2_LINUX_KERNEL_ZIMAGE),y)
  153. LINUX_IMAGE_NAME = zImage
  154. else ifeq ($(BR2_LINUX_KERNEL_ZIMAGE_EPAPR),y)
  155. LINUX_IMAGE_NAME = zImage.epapr
  156. else ifeq ($(BR2_LINUX_KERNEL_APPENDED_ZIMAGE),y)
  157. LINUX_IMAGE_NAME = zImage
  158. else ifeq ($(BR2_LINUX_KERNEL_CUIMAGE),y)
  159. LINUX_IMAGE_NAME = cuImage.$(firstword $(LINUX_DTS_NAME))
  160. else ifeq ($(BR2_LINUX_KERNEL_SIMPLEIMAGE),y)
  161. LINUX_IMAGE_NAME = simpleImage.$(firstword $(LINUX_DTS_NAME))
  162. else ifeq ($(BR2_LINUX_KERNEL_IMAGE),y)
  163. LINUX_IMAGE_NAME = Image
  164. else ifeq ($(BR2_LINUX_KERNEL_LINUX_BIN),y)
  165. LINUX_IMAGE_NAME = linux.bin
  166. else ifeq ($(BR2_LINUX_KERNEL_VMLINUX_BIN),y)
  167. LINUX_IMAGE_NAME = vmlinux.bin
  168. else ifeq ($(BR2_LINUX_KERNEL_VMLINUX),y)
  169. LINUX_IMAGE_NAME = vmlinux
  170. else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ),y)
  171. LINUX_IMAGE_NAME = vmlinuz
  172. else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ_BIN),y)
  173. LINUX_IMAGE_NAME = vmlinuz.bin
  174. endif
  175. # The if-else blocks above are all the image types we know of, and all
  176. # come from a Kconfig choice, so we know we have LINUX_IMAGE_NAME set
  177. # to something
  178. LINUX_TARGET_NAME = $(LINUX_IMAGE_NAME)
  179. endif
  180. LINUX_KERNEL_UIMAGE_LOADADDR = $(call qstrip,$(BR2_LINUX_KERNEL_UIMAGE_LOADADDR))
  181. ifneq ($(LINUX_KERNEL_UIMAGE_LOADADDR),)
  182. LINUX_MAKE_FLAGS += LOADADDR="$(LINUX_KERNEL_UIMAGE_LOADADDR)"
  183. endif
  184. # Compute the arch path, since i386 and x86_64 are in arch/x86 and not
  185. # in arch/$(KERNEL_ARCH). Even if the kernel creates symbolic links
  186. # for bzImage, arch/i386 and arch/x86_64 do not exist when copying the
  187. # defconfig file.
  188. ifeq ($(KERNEL_ARCH),i386)
  189. LINUX_ARCH_PATH = $(LINUX_DIR)/arch/x86
  190. else ifeq ($(KERNEL_ARCH),x86_64)
  191. LINUX_ARCH_PATH = $(LINUX_DIR)/arch/x86
  192. else
  193. LINUX_ARCH_PATH = $(LINUX_DIR)/arch/$(KERNEL_ARCH)
  194. endif
  195. ifeq ($(BR2_LINUX_KERNEL_VMLINUX),y)
  196. LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
  197. else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ),y)
  198. LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
  199. else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ_BIN),y)
  200. LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
  201. else
  202. LINUX_IMAGE_PATH = $(LINUX_ARCH_PATH)/boot/$(LINUX_IMAGE_NAME)
  203. endif # BR2_LINUX_KERNEL_VMLINUX
  204. define LINUX_APPLY_LOCAL_PATCHES
  205. for p in $(filter-out ftp://% http://% https://%,$(LINUX_PATCHES)) ; do \
  206. if test -d $$p ; then \
  207. $(APPLY_PATCHES) $(@D) $$p \*.patch || exit 1 ; \
  208. else \
  209. $(APPLY_PATCHES) $(@D) `dirname $$p` `basename $$p` || exit 1; \
  210. fi \
  211. done
  212. endef
  213. LINUX_POST_PATCH_HOOKS += LINUX_APPLY_LOCAL_PATCHES
  214. # Older linux kernels use deprecated perl constructs in timeconst.pl
  215. # that were removed for perl 5.22+ so it breaks on newer distributions
  216. # Try a dry-run patch to see if this applies, if it does go ahead
  217. define LINUX_TRY_PATCH_TIMECONST
  218. @if patch -p1 --dry-run -f -s -d $(@D) <$(LINUX_PKGDIR)/0001-timeconst.pl-Eliminate-Perl-warning.patch.conditional >/dev/null ; then \
  219. $(APPLY_PATCHES) $(@D) $(LINUX_PKGDIR) 0001-timeconst.pl-Eliminate-Perl-warning.patch.conditional ; \
  220. fi
  221. endef
  222. LINUX_POST_PATCH_HOOKS += LINUX_TRY_PATCH_TIMECONST
  223. LINUX_KERNEL_CUSTOM_LOGO_PATH = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_LOGO_PATH))
  224. ifneq ($(LINUX_KERNEL_CUSTOM_LOGO_PATH),)
  225. LINUX_DEPENDENCIES += host-imagemagick
  226. define LINUX_KERNEL_CUSTOM_LOGO_CONVERT
  227. $(HOST_DIR)/bin/convert $(LINUX_KERNEL_CUSTOM_LOGO_PATH) \
  228. -dither None -colors 224 -compress none \
  229. $(LINUX_DIR)/drivers/video/logo/logo_linux_clut224.ppm
  230. endef
  231. LINUX_PRE_BUILD_HOOKS += LINUX_KERNEL_CUSTOM_LOGO_CONVERT
  232. endif
  233. ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y)
  234. LINUX_KCONFIG_DEFCONFIG = $(call qstrip,$(BR2_LINUX_KERNEL_DEFCONFIG))_defconfig
  235. else ifeq ($(BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG),y)
  236. LINUX_KCONFIG_DEFCONFIG = defconfig
  237. else ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG),y)
  238. LINUX_KCONFIG_FILE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE))
  239. endif
  240. LINUX_KCONFIG_FRAGMENT_FILES = $(call qstrip,$(BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES))
  241. LINUX_KCONFIG_EDITORS = menuconfig xconfig gconfig nconfig
  242. # LINUX_MAKE_FLAGS overrides HOSTCC to allow the kernel build to find
  243. # our host-openssl and host-libelf. However, this triggers a bug in
  244. # the kconfig build script that causes it to build with
  245. # /usr/include/ncurses.h (which is typically wchar) but link with
  246. # $(HOST_DIR)/lib/libncurses.so (which is not). We don't actually
  247. # need any host-package for kconfig, so remove the HOSTCC override
  248. # again. In addition, even though linux depends on the toolchain and
  249. # therefore host-ccache would be ready, we use HOSTCC_NOCCACHE for
  250. # consistency with other kconfig packages.
  251. LINUX_KCONFIG_OPTS = $(LINUX_MAKE_FLAGS) HOSTCC="$(HOSTCC_NOCCACHE)"
  252. # If no package has yet set it, set it from the Kconfig option
  253. LINUX_NEEDS_MODULES ?= $(BR2_LINUX_NEEDS_MODULES)
  254. # Make sure the Linux kernel is built with the right endianness. Not
  255. # all architectures support
  256. # CONFIG_CPU_BIG_ENDIAN/CONFIG_CPU_LITTLE_ENDIAN in Linux, but the
  257. # option will be thrown away and ignored if it doesn't exist.
  258. ifeq ($(BR2_ENDIAN),"BIG")
  259. define LINUX_FIXUP_CONFIG_ENDIANNESS
  260. $(call KCONFIG_ENABLE_OPT,CONFIG_CPU_BIG_ENDIAN,$(@D)/.config)
  261. endef
  262. else
  263. define LINUX_FIXUP_CONFIG_ENDIANNESS
  264. $(call KCONFIG_ENABLE_OPT,CONFIG_CPU_LITTLE_ENDIAN,$(@D)/.config)
  265. endef
  266. endif
  267. define LINUX_KCONFIG_FIXUP_CMDS
  268. $(if $(LINUX_NEEDS_MODULES),
  269. $(call KCONFIG_ENABLE_OPT,CONFIG_MODULES,$(@D)/.config))
  270. $(call KCONFIG_ENABLE_OPT,$(strip $(LINUX_COMPRESSION_OPT_y)),$(@D)/.config)
  271. $(foreach opt, $(LINUX_COMPRESSION_OPT_),
  272. $(call KCONFIG_DISABLE_OPT,$(opt),$(@D)/.config)
  273. )
  274. $(LINUX_FIXUP_CONFIG_ENDIANNESS)
  275. $(if $(BR2_arm)$(BR2_armeb),
  276. $(call KCONFIG_ENABLE_OPT,CONFIG_AEABI,$(@D)/.config))
  277. $(if $(BR2_TARGET_ROOTFS_CPIO),
  278. $(call KCONFIG_ENABLE_OPT,CONFIG_BLK_DEV_INITRD,$(@D)/.config))
  279. # As the kernel gets compiled before root filesystems are
  280. # built, we create a fake cpio file. It'll be
  281. # replaced later by the real cpio archive, and the kernel will be
  282. # rebuilt using the linux-rebuild-with-initramfs target.
  283. $(if $(BR2_TARGET_ROOTFS_INITRAMFS),
  284. mkdir -p $(BINARIES_DIR)
  285. touch $(BINARIES_DIR)/rootfs.cpio
  286. $(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_SOURCE,"$${BR_BINARIES_DIR}/rootfs.cpio",$(@D)/.config)
  287. $(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_ROOT_UID,0,$(@D)/.config)
  288. $(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_ROOT_GID,0,$(@D)/.config))
  289. $(if $(BR2_ROOTFS_DEVICE_CREATION_STATIC),,
  290. $(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS,$(@D)/.config)
  291. $(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS_MOUNT,$(@D)/.config))
  292. $(if $(BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV),
  293. $(call KCONFIG_ENABLE_OPT,CONFIG_INOTIFY_USER,$(@D)/.config))
  294. $(if $(BR2_PACKAGE_AUDIT),
  295. $(call KCONFIG_ENABLE_OPT,CONFIG_NET,$(@D)/.config)
  296. $(call KCONFIG_ENABLE_OPT,CONFIG_AUDIT,$(@D)/.config))
  297. $(if $(BR2_PACKAGE_KTAP),
  298. $(call KCONFIG_ENABLE_OPT,CONFIG_DEBUG_FS,$(@D)/.config)
  299. $(call KCONFIG_ENABLE_OPT,CONFIG_ENABLE_DEFAULT_TRACERS,$(@D)/.config)
  300. $(call KCONFIG_ENABLE_OPT,CONFIG_PERF_EVENTS,$(@D)/.config)
  301. $(call KCONFIG_ENABLE_OPT,CONFIG_FUNCTION_TRACER,$(@D)/.config))
  302. $(if $(BR2_PACKAGE_LINUX_TOOLS_PERF),
  303. $(call KCONFIG_ENABLE_OPT,CONFIG_PERF_EVENTS,$(@D)/.config))
  304. $(if $(BR2_PACKAGE_SYSTEMD),
  305. $(call KCONFIG_ENABLE_OPT,CONFIG_CGROUPS,$(@D)/.config)
  306. $(call KCONFIG_ENABLE_OPT,CONFIG_INOTIFY_USER,$(@D)/.config)
  307. $(call KCONFIG_ENABLE_OPT,CONFIG_FHANDLE,$(@D)/.config)
  308. $(call KCONFIG_ENABLE_OPT,CONFIG_AUTOFS4_FS,$(@D)/.config)
  309. $(call KCONFIG_ENABLE_OPT,CONFIG_TMPFS_POSIX_ACL,$(@D)/.config)
  310. $(call KCONFIG_ENABLE_OPT,CONFIG_TMPFS_XATTR,$(@D)/.config))
  311. $(if $(BR2_PACKAGE_SMACK),
  312. $(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY,$(@D)/.config)
  313. $(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY_SMACK,$(@D)/.config)
  314. $(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY_NETWORK,$(@D)/.config))
  315. $(if $(BR2_PACKAGE_SUNXI_MALI_MAINLINE_DRIVER),
  316. $(call KCONFIG_ENABLE_OPT,CONFIG_CMA,$(@D)/.config)
  317. $(call KCONFIG_ENABLE_OPT,CONFIG_DMA_CMA,$(@D)/.config))
  318. $(if $(BR2_PACKAGE_IPTABLES),
  319. $(call KCONFIG_ENABLE_OPT,CONFIG_IP_NF_IPTABLES,$(@D)/.config)
  320. $(call KCONFIG_ENABLE_OPT,CONFIG_IP_NF_FILTER,$(@D)/.config)
  321. $(call KCONFIG_ENABLE_OPT,CONFIG_NETFILTER,$(@D)/.config)
  322. $(call KCONFIG_ENABLE_OPT,CONFIG_NETFILTER_XTABLES,$(@D)/.config))
  323. $(if $(BR2_PACKAGE_XTABLES_ADDONS),
  324. $(call KCONFIG_ENABLE_OPT,CONFIG_NETFILTER_ADVANCED,$(@D)/.config)
  325. $(call KCONFIG_ENABLE_OPT,CONFIG_NF_CONNTRACK,$(@D)/.config)
  326. $(call KCONFIG_ENABLE_OPT,CONFIG_NF_CONNTRACK_MARK,$(@D)/.config))
  327. $(if $(BR2_PACKAGE_WIREGUARD),
  328. $(call KCONFIG_ENABLE_OPT,CONFIG_INET,$(@D)/.config)
  329. $(call KCONFIG_ENABLE_OPT,CONFIG_NET,$(@D)/.config)
  330. $(call KCONFIG_ENABLE_OPT,CONFIG_NET_FOU,$(@D)/.config)
  331. $(call KCONFIG_ENABLE_OPT,CONFIG_CRYPTO,$(@D)/.config)
  332. $(call KCONFIG_ENABLE_OPT,CONFIG_CRYPTO_MANAGER,$(@D)/.config))
  333. $(if $(BR2_LINUX_KERNEL_APPENDED_DTB),
  334. $(call KCONFIG_ENABLE_OPT,CONFIG_ARM_APPENDED_DTB,$(@D)/.config))
  335. $(if $(BR2_PACKAGE_KERNEL_MODULE_IMX_GPU_VIV),
  336. $(call KCONFIG_DISABLE_OPT,CONFIG_MXC_GPU_VIV,$(@D)/.config))
  337. $(if $(LINUX_KERNEL_CUSTOM_LOGO_PATH),
  338. $(call KCONFIG_ENABLE_OPT,CONFIG_FB,$(@D)/.config)
  339. $(call KCONFIG_ENABLE_OPT,CONFIG_LOGO,$(@D)/.config)
  340. $(call KCONFIG_ENABLE_OPT,CONFIG_LOGO_LINUX_CLUT224,$(@D)/.config))
  341. endef
  342. ifeq ($(BR2_LINUX_KERNEL_DTS_SUPPORT),y)
  343. # Starting with 4.17, the generated dtc parser code is no longer
  344. # shipped with the kernel sources, so we need flex and bison. For
  345. # reproducibility, we use our owns rather than the host ones.
  346. LINUX_DEPENDENCIES += host-bison host-flex
  347. ifeq ($(BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT),)
  348. define LINUX_BUILD_DTB
  349. $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(LINUX_DTBS)
  350. endef
  351. ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),)
  352. define LINUX_INSTALL_DTB
  353. # dtbs moved from arch/<ARCH>/boot to arch/<ARCH>/boot/dts since 3.8-rc1
  354. cp $(addprefix \
  355. $(LINUX_ARCH_PATH)/boot/$(if $(wildcard \
  356. $(addprefix $(LINUX_ARCH_PATH)/boot/dts/,$(LINUX_DTBS))),dts/),$(LINUX_DTBS)) \
  357. $(1)
  358. endef
  359. endif # BR2_LINUX_KERNEL_APPENDED_DTB
  360. endif # BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT
  361. endif # BR2_LINUX_KERNEL_DTS_SUPPORT
  362. ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),y)
  363. # dtbs moved from arch/$ARCH/boot to arch/$ARCH/boot/dts since 3.8-rc1
  364. define LINUX_APPEND_DTB
  365. (cd $(LINUX_ARCH_PATH)/boot; \
  366. for dtb in $(LINUX_DTS_NAME); do \
  367. if test -e $${dtb}.dtb ; then \
  368. dtbpath=$${dtb}.dtb ; \
  369. else \
  370. dtbpath=dts/$${dtb}.dtb ; \
  371. fi ; \
  372. cat zImage $${dtbpath} > zImage.$${dtb} || exit 1; \
  373. done)
  374. endef
  375. ifeq ($(BR2_LINUX_KERNEL_APPENDED_UIMAGE),y)
  376. # We need to generate a new u-boot image that takes into
  377. # account the extra-size added by the device tree at the end
  378. # of the image. To do so, we first need to retrieve both load
  379. # address and entry point for the kernel from the already
  380. # generate uboot image before using mkimage -l.
  381. LINUX_APPEND_DTB += ; \
  382. MKIMAGE_ARGS=`$(MKIMAGE) -l $(LINUX_IMAGE_PATH) |\
  383. sed -n -e 's/Image Name:[ ]*\(.*\)/-n \1/p' -e 's/Load Address:/-a/p' -e 's/Entry Point:/-e/p'`; \
  384. for dtb in $(LINUX_DTS_NAME); do \
  385. $(MKIMAGE) -A $(MKIMAGE_ARCH) -O linux \
  386. -T kernel -C none $${MKIMAGE_ARGS} \
  387. -d $(LINUX_ARCH_PATH)/boot/zImage.$${dtb} $(LINUX_IMAGE_PATH).$${dtb}; \
  388. done
  389. endif
  390. endif
  391. # Compilation. We make sure the kernel gets rebuilt when the
  392. # configuration has changed.
  393. define LINUX_BUILD_CMDS
  394. $(foreach dts,$(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH)), \
  395. cp -f $(dts) $(LINUX_ARCH_PATH)/boot/dts/
  396. )
  397. $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(LINUX_TARGET_NAME)
  398. @if grep -q "CONFIG_MODULES=y" $(@D)/.config; then \
  399. $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) modules ; \
  400. fi
  401. $(LINUX_BUILD_DTB)
  402. $(LINUX_APPEND_DTB)
  403. endef
  404. ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),y)
  405. # When a DTB was appended, install the potential several images with
  406. # appended DTBs.
  407. define LINUX_INSTALL_IMAGE
  408. mkdir -p $(1)
  409. cp $(LINUX_ARCH_PATH)/boot/$(LINUX_IMAGE_NAME).* $(1)
  410. endef
  411. else
  412. # Otherwise, just install the unique image generated by the kernel
  413. # build process.
  414. define LINUX_INSTALL_IMAGE
  415. $(INSTALL) -m 0644 -D $(LINUX_IMAGE_PATH) $(1)/$(LINUX_IMAGE_NAME)
  416. endef
  417. endif
  418. ifeq ($(BR2_LINUX_KERNEL_INSTALL_TARGET),y)
  419. define LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET
  420. $(call LINUX_INSTALL_IMAGE,$(TARGET_DIR)/boot)
  421. $(call LINUX_INSTALL_DTB,$(TARGET_DIR)/boot)
  422. endef
  423. endif
  424. define LINUX_INSTALL_HOST_TOOLS
  425. # Installing dtc (device tree compiler) as host tool, if selected
  426. if grep -q "CONFIG_DTC=y" $(@D)/.config; then \
  427. $(INSTALL) -D -m 0755 $(@D)/scripts/dtc/dtc $(HOST_DIR)/bin/linux-dtc ; \
  428. $(if $(BR2_PACKAGE_HOST_DTC),,ln -sf linux-dtc $(HOST_DIR)/bin/dtc;) \
  429. fi
  430. endef
  431. define LINUX_INSTALL_IMAGES_CMDS
  432. $(call LINUX_INSTALL_IMAGE,$(BINARIES_DIR))
  433. $(call LINUX_INSTALL_DTB,$(BINARIES_DIR))
  434. endef
  435. ifeq ($(BR2_STRIP_strip),y)
  436. LINUX_MAKE_FLAGS += INSTALL_MOD_STRIP=1
  437. endif
  438. define LINUX_INSTALL_TARGET_CMDS
  439. $(LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET)
  440. # Install modules and remove symbolic links pointing to build
  441. # directories, not relevant on the target
  442. @if grep -q "CONFIG_MODULES=y" $(@D)/.config; then \
  443. $(LINUX_MAKE_ENV) $(MAKE1) $(LINUX_MAKE_FLAGS) -C $(@D) modules_install; \
  444. rm -f $(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED)/build ; \
  445. rm -f $(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED)/source ; \
  446. fi
  447. $(LINUX_INSTALL_HOST_TOOLS)
  448. endef
  449. # Include all our extensions.
  450. #
  451. # Note: our package infrastructure uses the full-path of the last-scanned
  452. # Makefile to determine what package we're currently defining, using the
  453. # last directory component in the path. As such, including other Makefile,
  454. # like below, before we call one of the *-package macro is usally not
  455. # working.
  456. # However, since the files we include here are in the same directory as
  457. # the current Makefile, we are OK. But this is a hard requirement: files
  458. # included here *must* be in the same directory!
  459. include $(sort $(wildcard linux/linux-ext-*.mk))
  460. LINUX_PATCH_DEPENDENCIES += $(foreach ext,$(LINUX_EXTENSIONS),\
  461. $(if $(BR2_LINUX_KERNEL_EXT_$(call UPPERCASE,$(ext))),$(ext)))
  462. LINUX_PRE_PATCH_HOOKS += $(foreach ext,$(LINUX_EXTENSIONS),\
  463. $(if $(BR2_LINUX_KERNEL_EXT_$(call UPPERCASE,$(ext))),\
  464. $(call UPPERCASE,$(ext))_PREPARE_KERNEL))
  465. # Checks to give errors that the user can understand
  466. # When a custom repository has been set, check for the repository version
  467. ifeq ($(BR2_LINUX_KERNEL_CUSTOM_SVN)$(BR2_LINUX_KERNEL_CUSTOM_GIT)$(BR2_LINUX_KERNEL_CUSTOM_HG),y)
  468. ifeq ($(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION)),)
  469. $(error No custom repository version set. Check your BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION setting)
  470. endif
  471. ifeq ($(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL)),)
  472. $(error No custom repo URL set. Check your BR2_LINUX_KERNEL_CUSTOM_REPO_URL setting)
  473. endif
  474. endif
  475. ifeq ($(BR_BUILDING),y)
  476. ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y)
  477. # We must use the user-supplied kconfig value, because
  478. # LINUX_KCONFIG_DEFCONFIG will at least contain the
  479. # trailing _defconfig
  480. ifeq ($(call qstrip,$(BR2_LINUX_KERNEL_DEFCONFIG)),)
  481. $(error No kernel defconfig name specified, check your BR2_LINUX_KERNEL_DEFCONFIG setting)
  482. endif
  483. endif
  484. ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG),y)
  485. ifeq ($(LINUX_KCONFIG_FILE),)
  486. $(error No kernel configuration file specified, check your BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE setting)
  487. endif
  488. endif
  489. ifeq ($(BR2_LINUX_KERNEL_DTS_SUPPORT):$(strip $(LINUX_DTS_NAME)),y:)
  490. $(error No kernel device tree source specified, check your \
  491. BR2_LINUX_KERNEL_INTREE_DTS_NAME / BR2_LINUX_KERNEL_CUSTOM_DTS_PATH settings)
  492. endif
  493. endif # BR_BUILDING
  494. $(eval $(kconfig-package))
  495. # Support for rebuilding the kernel after the cpio archive has
  496. # been generated.
  497. .PHONY: linux-rebuild-with-initramfs
  498. linux-rebuild-with-initramfs: $(LINUX_DIR)/.stamp_target_installed
  499. linux-rebuild-with-initramfs: $(LINUX_DIR)/.stamp_images_installed
  500. linux-rebuild-with-initramfs: rootfs-cpio
  501. linux-rebuild-with-initramfs:
  502. @$(call MESSAGE,"Rebuilding kernel with initramfs")
  503. # Build the kernel.
  504. $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(LINUX_DIR) $(LINUX_TARGET_NAME)
  505. $(LINUX_APPEND_DTB)
  506. # Copy the kernel image(s) to its(their) final destination
  507. $(call LINUX_INSTALL_IMAGE,$(BINARIES_DIR))
  508. # If there is a .ub file copy it to the final destination
  509. test ! -f $(LINUX_IMAGE_PATH).ub || cp $(LINUX_IMAGE_PATH).ub $(BINARIES_DIR)