linux.mk 23 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. ifeq ($(findstring x2.6.,x$(LINUX_VERSION)),x2.6.)
  38. LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v2.6
  39. else
  40. LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v$(firstword $(subst ., ,$(LINUX_VERSION))).x
  41. endif
  42. endif
  43. ifeq ($(BR2_LINUX_KERNEL)$(BR2_LINUX_KERNEL_LATEST_VERSION),y)
  44. BR_NO_CHECK_HASH_FOR += $(LINUX_SOURCE)
  45. endif
  46. LINUX_PATCHES = $(call qstrip,$(BR2_LINUX_KERNEL_PATCH))
  47. # We have no way to know the hashes for user-supplied patches.
  48. BR_NO_CHECK_HASH_FOR += $(notdir $(LINUX_PATCHES))
  49. # We rely on the generic package infrastructure to download and apply
  50. # remote patches (downloaded from ftp, http or https). For local
  51. # patches, we can't rely on that infrastructure, because there might
  52. # be directories in the patch list (unlike for other packages).
  53. LINUX_PATCH = $(filter ftp://% http://% https://%,$(LINUX_PATCHES))
  54. # while the kernel is built for the target, the build may need various
  55. # host libraries depending on config (and version), so use
  56. # HOST_MAKE_ENV here. In particular, this ensures that our
  57. # host-pkgconf will look for host libraries and not target ones.
  58. LINUX_MAKE_ENV = \
  59. $(HOST_MAKE_ENV) \
  60. BR_BINARIES_DIR=$(BINARIES_DIR)
  61. LINUX_INSTALL_IMAGES = YES
  62. LINUX_DEPENDENCIES = host-kmod \
  63. $(if $(BR2_PACKAGE_INTEL_MICROCODE),intel-microcode)
  64. # Starting with 4.16, the generated kconfig paser code is no longer
  65. # shipped with the kernel sources, so we need flex and bison, but
  66. # only if the host does not have them.
  67. LINUX_KCONFIG_DEPENDENCIES = \
  68. $(BR2_BISON_HOST_DEPENDENCY) \
  69. $(BR2_FLEX_HOST_DEPENDENCY)
  70. # Starting with 4.18, the kconfig in the kernel calls the
  71. # cross-compiler to check its capabilities. So we need the
  72. # toolchain before we can call the configurators.
  73. LINUX_KCONFIG_DEPENDENCIES += toolchain
  74. # host tools needed for kernel compression
  75. ifeq ($(BR2_LINUX_KERNEL_LZ4),y)
  76. LINUX_DEPENDENCIES += host-lz4
  77. else ifeq ($(BR2_LINUX_KERNEL_LZMA),y)
  78. LINUX_DEPENDENCIES += host-lzma
  79. else ifeq ($(BR2_LINUX_KERNEL_LZO),y)
  80. LINUX_DEPENDENCIES += host-lzop
  81. else ifeq ($(BR2_LINUX_KERNEL_XZ),y)
  82. LINUX_DEPENDENCIES += host-xz
  83. endif
  84. LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_GZIP) += CONFIG_KERNEL_GZIP
  85. LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZ4) += CONFIG_KERNEL_LZ4
  86. LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZMA) += CONFIG_KERNEL_LZMA
  87. LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZO) += CONFIG_KERNEL_LZO
  88. LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_XZ) += CONFIG_KERNEL_XZ
  89. ifeq ($(BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL),y)
  90. LINUX_DEPENDENCIES += host-openssl
  91. endif
  92. ifeq ($(BR2_LINUX_KERNEL_NEEDS_HOST_LIBELF),y)
  93. LINUX_DEPENDENCIES += host-elfutils host-pkgconf
  94. endif
  95. # If host-uboot-tools is selected by the user, assume it is needed to
  96. # create a custom image
  97. ifeq ($(BR2_PACKAGE_HOST_UBOOT_TOOLS),y)
  98. LINUX_DEPENDENCIES += host-uboot-tools
  99. endif
  100. ifneq ($(ARCH_XTENSA_OVERLAY_FILE),)
  101. define LINUX_XTENSA_OVERLAY_EXTRACT
  102. $(call arch-xtensa-overlay-extract,$(@D),linux)
  103. endef
  104. LINUX_POST_EXTRACT_HOOKS += LINUX_XTENSA_OVERLAY_EXTRACT
  105. LINUX_EXTRA_DOWNLOADS += $(ARCH_XTENSA_OVERLAY_URL)
  106. endif
  107. LINUX_MAKE_FLAGS = \
  108. HOSTCC="$(HOSTCC) $(HOST_CFLAGS) $(HOST_LDFLAGS)" \
  109. ARCH=$(KERNEL_ARCH) \
  110. INSTALL_MOD_PATH=$(TARGET_DIR) \
  111. CROSS_COMPILE="$(TARGET_CROSS)" \
  112. DEPMOD=$(HOST_DIR)/sbin/depmod
  113. ifeq ($(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 ($(BR2_TOOLCHAIN_GCC_AT_LEAST_8),y)
  127. LINUX_MAKE_ENV += KCFLAGS=-Wno-attribute-alias
  128. endif
  129. ifeq ($(BR2_LINUX_KERNEL_DTB_OVERLAY_SUPPORT),y)
  130. LINUX_MAKE_ENV += DTC_FLAGS=-@
  131. endif
  132. # Get the real Linux version, which tells us where kernel modules are
  133. # going to be installed in the target filesystem.
  134. LINUX_VERSION_PROBED = `$(MAKE) $(LINUX_MAKE_FLAGS) -C $(LINUX_DIR) --no-print-directory -s kernelrelease 2>/dev/null`
  135. LINUX_DTS_NAME += $(call qstrip,$(BR2_LINUX_KERNEL_INTREE_DTS_NAME))
  136. # We keep only the .dts files, so that the user can specify both .dts
  137. # and .dtsi files in BR2_LINUX_KERNEL_CUSTOM_DTS_PATH. Both will be
  138. # copied to arch/<arch>/boot/dts, but only the .dts files will
  139. # actually be generated as .dtb.
  140. LINUX_DTS_NAME += $(basename $(filter %.dts,$(notdir $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH)))))
  141. LINUX_DTBS = $(addsuffix .dtb,$(LINUX_DTS_NAME))
  142. ifeq ($(BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM),y)
  143. LINUX_IMAGE_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_IMAGE_NAME))
  144. LINUX_TARGET_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_IMAGE_TARGET_NAME))
  145. ifeq ($(LINUX_IMAGE_NAME),)
  146. LINUX_IMAGE_NAME = $(LINUX_TARGET_NAME)
  147. endif
  148. else
  149. ifeq ($(BR2_LINUX_KERNEL_UIMAGE),y)
  150. LINUX_IMAGE_NAME = uImage
  151. else ifeq ($(BR2_LINUX_KERNEL_APPENDED_UIMAGE),y)
  152. LINUX_IMAGE_NAME = uImage
  153. else ifeq ($(BR2_LINUX_KERNEL_BZIMAGE),y)
  154. LINUX_IMAGE_NAME = bzImage
  155. else ifeq ($(BR2_LINUX_KERNEL_ZIMAGE),y)
  156. LINUX_IMAGE_NAME = zImage
  157. else ifeq ($(BR2_LINUX_KERNEL_ZIMAGE_EPAPR),y)
  158. LINUX_IMAGE_NAME = zImage.epapr
  159. else ifeq ($(BR2_LINUX_KERNEL_APPENDED_ZIMAGE),y)
  160. LINUX_IMAGE_NAME = zImage
  161. else ifeq ($(BR2_LINUX_KERNEL_CUIMAGE),y)
  162. LINUX_IMAGE_NAME = cuImage.$(firstword $(LINUX_DTS_NAME))
  163. else ifeq ($(BR2_LINUX_KERNEL_SIMPLEIMAGE),y)
  164. LINUX_IMAGE_NAME = simpleImage.$(firstword $(LINUX_DTS_NAME))
  165. else ifeq ($(BR2_LINUX_KERNEL_IMAGE),y)
  166. LINUX_IMAGE_NAME = Image
  167. else ifeq ($(BR2_LINUX_KERNEL_LINUX_BIN),y)
  168. LINUX_IMAGE_NAME = linux.bin
  169. else ifeq ($(BR2_LINUX_KERNEL_VMLINUX_BIN),y)
  170. LINUX_IMAGE_NAME = vmlinux.bin
  171. else ifeq ($(BR2_LINUX_KERNEL_VMLINUX),y)
  172. LINUX_IMAGE_NAME = vmlinux
  173. else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ),y)
  174. LINUX_IMAGE_NAME = vmlinuz
  175. else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ_BIN),y)
  176. LINUX_IMAGE_NAME = vmlinuz.bin
  177. endif
  178. # The if-else blocks above are all the image types we know of, and all
  179. # come from a Kconfig choice, so we know we have LINUX_IMAGE_NAME set
  180. # to something
  181. LINUX_TARGET_NAME = $(LINUX_IMAGE_NAME)
  182. endif
  183. LINUX_KERNEL_UIMAGE_LOADADDR = $(call qstrip,$(BR2_LINUX_KERNEL_UIMAGE_LOADADDR))
  184. ifneq ($(LINUX_KERNEL_UIMAGE_LOADADDR),)
  185. LINUX_MAKE_FLAGS += LOADADDR="$(LINUX_KERNEL_UIMAGE_LOADADDR)"
  186. endif
  187. # Compute the arch path, since i386 and x86_64 are in arch/x86 and not
  188. # in arch/$(KERNEL_ARCH). Even if the kernel creates symbolic links
  189. # for bzImage, arch/i386 and arch/x86_64 do not exist when copying the
  190. # defconfig file.
  191. ifeq ($(KERNEL_ARCH),i386)
  192. LINUX_ARCH_PATH = $(LINUX_DIR)/arch/x86
  193. else ifeq ($(KERNEL_ARCH),x86_64)
  194. LINUX_ARCH_PATH = $(LINUX_DIR)/arch/x86
  195. else
  196. LINUX_ARCH_PATH = $(LINUX_DIR)/arch/$(KERNEL_ARCH)
  197. endif
  198. ifeq ($(BR2_LINUX_KERNEL_VMLINUX),y)
  199. LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
  200. else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ),y)
  201. LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
  202. else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ_BIN),y)
  203. LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
  204. else
  205. LINUX_IMAGE_PATH = $(LINUX_ARCH_PATH)/boot/$(LINUX_IMAGE_NAME)
  206. endif # BR2_LINUX_KERNEL_VMLINUX
  207. define LINUX_APPLY_LOCAL_PATCHES
  208. for p in $(filter-out ftp://% http://% https://%,$(LINUX_PATCHES)) ; do \
  209. if test -d $$p ; then \
  210. $(APPLY_PATCHES) $(@D) $$p \*.patch || exit 1 ; \
  211. else \
  212. $(APPLY_PATCHES) $(@D) `dirname $$p` `basename $$p` || exit 1; \
  213. fi \
  214. done
  215. endef
  216. LINUX_POST_PATCH_HOOKS += LINUX_APPLY_LOCAL_PATCHES
  217. # Older linux kernels use deprecated perl constructs in timeconst.pl
  218. # that were removed for perl 5.22+ so it breaks on newer distributions
  219. # Try a dry-run patch to see if this applies, if it does go ahead
  220. define LINUX_TRY_PATCH_TIMECONST
  221. @if patch -p1 --dry-run -f -s -d $(@D) <$(LINUX_PKGDIR)/0001-timeconst.pl-Eliminate-Perl-warning.patch.conditional >/dev/null ; then \
  222. $(APPLY_PATCHES) $(@D) $(LINUX_PKGDIR) 0001-timeconst.pl-Eliminate-Perl-warning.patch.conditional ; \
  223. fi
  224. endef
  225. LINUX_POST_PATCH_HOOKS += LINUX_TRY_PATCH_TIMECONST
  226. LINUX_KERNEL_CUSTOM_LOGO_PATH = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_LOGO_PATH))
  227. ifneq ($(LINUX_KERNEL_CUSTOM_LOGO_PATH),)
  228. LINUX_DEPENDENCIES += host-imagemagick
  229. define LINUX_KERNEL_CUSTOM_LOGO_CONVERT
  230. $(HOST_DIR)/bin/convert $(LINUX_KERNEL_CUSTOM_LOGO_PATH) \
  231. -dither None -colors 224 -compress none \
  232. $(LINUX_DIR)/drivers/video/logo/logo_linux_clut224.ppm
  233. endef
  234. LINUX_PRE_BUILD_HOOKS += LINUX_KERNEL_CUSTOM_LOGO_CONVERT
  235. endif
  236. ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y)
  237. LINUX_KCONFIG_DEFCONFIG = $(call qstrip,$(BR2_LINUX_KERNEL_DEFCONFIG))_defconfig
  238. else ifeq ($(BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG),y)
  239. LINUX_KCONFIG_DEFCONFIG = defconfig
  240. else ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG),y)
  241. LINUX_KCONFIG_FILE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE))
  242. endif
  243. LINUX_KCONFIG_FRAGMENT_FILES = $(call qstrip,$(BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES))
  244. LINUX_KCONFIG_EDITORS = menuconfig xconfig gconfig nconfig
  245. # LINUX_MAKE_FLAGS overrides HOSTCC to allow the kernel build to find
  246. # our host-openssl and host-libelf. However, this triggers a bug in
  247. # the kconfig build script that causes it to build with
  248. # /usr/include/ncurses.h (which is typically wchar) but link with
  249. # $(HOST_DIR)/lib/libncurses.so (which is not). We don't actually
  250. # need any host-package for kconfig, so remove the HOSTCC override
  251. # again. In addition, even though linux depends on the toolchain and
  252. # therefore host-ccache would be ready, we use HOSTCC_NOCCACHE for
  253. # consistency with other kconfig packages.
  254. LINUX_KCONFIG_OPTS = $(LINUX_MAKE_FLAGS) HOSTCC="$(HOSTCC_NOCCACHE)"
  255. # If no package has yet set it, set it from the Kconfig option
  256. LINUX_NEEDS_MODULES ?= $(BR2_LINUX_NEEDS_MODULES)
  257. # Make sure the Linux kernel is built with the right endianness. Not
  258. # all architectures support
  259. # CONFIG_CPU_BIG_ENDIAN/CONFIG_CPU_LITTLE_ENDIAN in Linux, but the
  260. # option will be thrown away and ignored if it doesn't exist.
  261. ifeq ($(BR2_ENDIAN),"BIG")
  262. define LINUX_FIXUP_CONFIG_ENDIANNESS
  263. $(call KCONFIG_ENABLE_OPT,CONFIG_CPU_BIG_ENDIAN,$(@D)/.config)
  264. endef
  265. else
  266. define LINUX_FIXUP_CONFIG_ENDIANNESS
  267. $(call KCONFIG_ENABLE_OPT,CONFIG_CPU_LITTLE_ENDIAN,$(@D)/.config)
  268. endef
  269. endif
  270. define LINUX_KCONFIG_FIXUP_CMDS
  271. $(if $(LINUX_NEEDS_MODULES),
  272. $(call KCONFIG_ENABLE_OPT,CONFIG_MODULES,$(@D)/.config))
  273. $(call KCONFIG_ENABLE_OPT,$(strip $(LINUX_COMPRESSION_OPT_y)),$(@D)/.config)
  274. $(foreach opt, $(LINUX_COMPRESSION_OPT_),
  275. $(call KCONFIG_DISABLE_OPT,$(opt),$(@D)/.config)
  276. )
  277. $(LINUX_FIXUP_CONFIG_ENDIANNESS)
  278. $(if $(BR2_arm)$(BR2_armeb),
  279. $(call KCONFIG_ENABLE_OPT,CONFIG_AEABI,$(@D)/.config))
  280. $(if $(BR2_powerpc)$(BR2_powerpc64)$(BR2_powerpc64le),
  281. $(call KCONFIG_ENABLE_OPT,CONFIG_PPC_DISABLE_WERROR,$(@D)/.config))
  282. $(if $(BR2_TARGET_ROOTFS_CPIO),
  283. $(call KCONFIG_ENABLE_OPT,CONFIG_BLK_DEV_INITRD,$(@D)/.config))
  284. # As the kernel gets compiled before root filesystems are
  285. # built, we create a fake cpio file. It'll be
  286. # replaced later by the real cpio archive, and the kernel will be
  287. # rebuilt using the linux-rebuild-with-initramfs target.
  288. $(if $(BR2_TARGET_ROOTFS_INITRAMFS),
  289. mkdir -p $(BINARIES_DIR)
  290. touch $(BINARIES_DIR)/rootfs.cpio
  291. $(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_SOURCE,"$${BR_BINARIES_DIR}/rootfs.cpio",$(@D)/.config)
  292. $(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_ROOT_UID,0,$(@D)/.config)
  293. $(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_ROOT_GID,0,$(@D)/.config))
  294. $(if $(BR2_ROOTFS_DEVICE_CREATION_STATIC),,
  295. $(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS,$(@D)/.config)
  296. $(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS_MOUNT,$(@D)/.config))
  297. $(if $(BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV),
  298. $(call KCONFIG_ENABLE_OPT,CONFIG_INOTIFY_USER,$(@D)/.config))
  299. $(if $(BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_MDEV),
  300. $(call KCONFIG_ENABLE_OPT,CONFIG_NET,$(@D)/.config))
  301. $(if $(BR2_PACKAGE_AUDIT),
  302. $(call KCONFIG_ENABLE_OPT,CONFIG_NET,$(@D)/.config)
  303. $(call KCONFIG_ENABLE_OPT,CONFIG_AUDIT,$(@D)/.config))
  304. $(if $(BR2_PACKAGE_INTEL_MICROCODE),
  305. $(call KCONFIG_ENABLE_OPT,CONFIG_MICROCODE,$(@D)/.config)
  306. $(call KCONFIG_ENABLE_OPT,CONFIG_MICROCODE_INTEL,$(@D)/.config))
  307. $(if $(BR2_PACKAGE_KTAP),
  308. $(call KCONFIG_ENABLE_OPT,CONFIG_DEBUG_FS,$(@D)/.config)
  309. $(call KCONFIG_ENABLE_OPT,CONFIG_ENABLE_DEFAULT_TRACERS,$(@D)/.config)
  310. $(call KCONFIG_ENABLE_OPT,CONFIG_PERF_EVENTS,$(@D)/.config)
  311. $(call KCONFIG_ENABLE_OPT,CONFIG_FUNCTION_TRACER,$(@D)/.config))
  312. $(if $(BR2_PACKAGE_LINUX_TOOLS_PERF),
  313. $(call KCONFIG_ENABLE_OPT,CONFIG_PERF_EVENTS,$(@D)/.config))
  314. $(if $(BR2_PACKAGE_PCM_TOOLS),
  315. $(call KCONFIG_ENABLE_OPT,CONFIG_X86_MSR,$(@D)/.config))
  316. $(if $(BR2_PACKAGE_SYSTEMD),
  317. $(call KCONFIG_ENABLE_OPT,CONFIG_CGROUPS,$(@D)/.config)
  318. $(call KCONFIG_ENABLE_OPT,CONFIG_INOTIFY_USER,$(@D)/.config)
  319. $(call KCONFIG_ENABLE_OPT,CONFIG_FHANDLE,$(@D)/.config)
  320. $(call KCONFIG_ENABLE_OPT,CONFIG_AUTOFS4_FS,$(@D)/.config)
  321. $(call KCONFIG_ENABLE_OPT,CONFIG_TMPFS_POSIX_ACL,$(@D)/.config)
  322. $(call KCONFIG_ENABLE_OPT,CONFIG_TMPFS_XATTR,$(@D)/.config))
  323. $(if $(BR2_PACKAGE_SMACK),
  324. $(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY,$(@D)/.config)
  325. $(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY_SMACK,$(@D)/.config)
  326. $(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY_NETWORK,$(@D)/.config))
  327. $(if $(BR2_PACKAGE_SUNXI_MALI_MAINLINE_DRIVER),
  328. $(call KCONFIG_ENABLE_OPT,CONFIG_CMA,$(@D)/.config)
  329. $(call KCONFIG_ENABLE_OPT,CONFIG_DMA_CMA,$(@D)/.config))
  330. $(if $(BR2_PACKAGE_IPTABLES),
  331. $(call KCONFIG_ENABLE_OPT,CONFIG_IP_NF_IPTABLES,$(@D)/.config)
  332. $(call KCONFIG_ENABLE_OPT,CONFIG_IP_NF_FILTER,$(@D)/.config)
  333. $(call KCONFIG_ENABLE_OPT,CONFIG_NETFILTER,$(@D)/.config)
  334. $(call KCONFIG_ENABLE_OPT,CONFIG_NETFILTER_XTABLES,$(@D)/.config))
  335. $(if $(BR2_PACKAGE_XTABLES_ADDONS),
  336. $(call KCONFIG_ENABLE_OPT,CONFIG_NETFILTER_ADVANCED,$(@D)/.config)
  337. $(call KCONFIG_ENABLE_OPT,CONFIG_NF_CONNTRACK,$(@D)/.config)
  338. $(call KCONFIG_ENABLE_OPT,CONFIG_NF_CONNTRACK_MARK,$(@D)/.config)
  339. $(call KCONFIG_ENABLE_OPT,CONFIG_NF_NAT,$(@D)/.config))
  340. $(if $(BR2_PACKAGE_WIREGUARD),
  341. $(call KCONFIG_ENABLE_OPT,CONFIG_INET,$(@D)/.config)
  342. $(call KCONFIG_ENABLE_OPT,CONFIG_NET,$(@D)/.config)
  343. $(call KCONFIG_ENABLE_OPT,CONFIG_NET_FOU,$(@D)/.config)
  344. $(call KCONFIG_ENABLE_OPT,CONFIG_CRYPTO,$(@D)/.config)
  345. $(call KCONFIG_ENABLE_OPT,CONFIG_CRYPTO_MANAGER,$(@D)/.config))
  346. $(if $(BR2_LINUX_KERNEL_APPENDED_DTB),
  347. $(call KCONFIG_ENABLE_OPT,CONFIG_ARM_APPENDED_DTB,$(@D)/.config))
  348. $(if $(BR2_PACKAGE_KERNEL_MODULE_IMX_GPU_VIV),
  349. $(call KCONFIG_DISABLE_OPT,CONFIG_MXC_GPU_VIV,$(@D)/.config))
  350. $(if $(LINUX_KERNEL_CUSTOM_LOGO_PATH),
  351. $(call KCONFIG_ENABLE_OPT,CONFIG_FB,$(@D)/.config)
  352. $(call KCONFIG_ENABLE_OPT,CONFIG_LOGO,$(@D)/.config)
  353. $(call KCONFIG_ENABLE_OPT,CONFIG_LOGO_LINUX_CLUT224,$(@D)/.config))
  354. endef
  355. ifeq ($(BR2_LINUX_KERNEL_DTS_SUPPORT),y)
  356. # Starting with 4.17, the generated dtc parser code is no longer
  357. # shipped with the kernel sources, so we need flex and bison. For
  358. # reproducibility, we use our owns rather than the host ones.
  359. LINUX_DEPENDENCIES += host-bison host-flex
  360. ifeq ($(BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT),)
  361. define LINUX_BUILD_DTB
  362. $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(LINUX_DTBS)
  363. endef
  364. ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),)
  365. define LINUX_INSTALL_DTB
  366. # dtbs moved from arch/<ARCH>/boot to arch/<ARCH>/boot/dts since 3.8-rc1
  367. cp $(addprefix \
  368. $(LINUX_ARCH_PATH)/boot/$(if $(wildcard \
  369. $(addprefix $(LINUX_ARCH_PATH)/boot/dts/,$(LINUX_DTBS))),dts/),$(LINUX_DTBS)) \
  370. $(1)
  371. endef
  372. endif # BR2_LINUX_KERNEL_APPENDED_DTB
  373. endif # BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT
  374. endif # BR2_LINUX_KERNEL_DTS_SUPPORT
  375. ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),y)
  376. # dtbs moved from arch/$ARCH/boot to arch/$ARCH/boot/dts since 3.8-rc1
  377. define LINUX_APPEND_DTB
  378. (cd $(LINUX_ARCH_PATH)/boot; \
  379. for dtb in $(LINUX_DTS_NAME); do \
  380. if test -e $${dtb}.dtb ; then \
  381. dtbpath=$${dtb}.dtb ; \
  382. else \
  383. dtbpath=dts/$${dtb}.dtb ; \
  384. fi ; \
  385. cat zImage $${dtbpath} > zImage.$${dtb} || exit 1; \
  386. done)
  387. endef
  388. ifeq ($(BR2_LINUX_KERNEL_APPENDED_UIMAGE),y)
  389. # We need to generate a new u-boot image that takes into
  390. # account the extra-size added by the device tree at the end
  391. # of the image. To do so, we first need to retrieve both load
  392. # address and entry point for the kernel from the already
  393. # generate uboot image before using mkimage -l.
  394. LINUX_APPEND_DTB += ; \
  395. MKIMAGE_ARGS=`$(MKIMAGE) -l $(LINUX_IMAGE_PATH) |\
  396. sed -n -e 's/Image Name:[ ]*\(.*\)/-n \1/p' -e 's/Load Address:/-a/p' -e 's/Entry Point:/-e/p'`; \
  397. for dtb in $(LINUX_DTS_NAME); do \
  398. $(MKIMAGE) -A $(MKIMAGE_ARCH) -O linux \
  399. -T kernel -C none $${MKIMAGE_ARGS} \
  400. -d $(LINUX_ARCH_PATH)/boot/zImage.$${dtb} $(LINUX_IMAGE_PATH).$${dtb}; \
  401. done
  402. endif
  403. endif
  404. # Compilation. We make sure the kernel gets rebuilt when the
  405. # configuration has changed. We call the 'all' and
  406. # '$(LINUX_TARGET_NAME)' targets separately because calling them in
  407. # the same $(MAKE) invocation has shown to cause parallel build
  408. # issues.
  409. define LINUX_BUILD_CMDS
  410. $(foreach dts,$(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH)), \
  411. cp -f $(dts) $(LINUX_ARCH_PATH)/boot/dts/
  412. )
  413. $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) all
  414. $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(LINUX_TARGET_NAME)
  415. $(LINUX_BUILD_DTB)
  416. $(LINUX_APPEND_DTB)
  417. endef
  418. ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),y)
  419. # When a DTB was appended, install the potential several images with
  420. # appended DTBs.
  421. define LINUX_INSTALL_IMAGE
  422. mkdir -p $(1)
  423. cp $(LINUX_ARCH_PATH)/boot/$(LINUX_IMAGE_NAME).* $(1)
  424. endef
  425. else
  426. # Otherwise, just install the unique image generated by the kernel
  427. # build process.
  428. define LINUX_INSTALL_IMAGE
  429. $(INSTALL) -m 0644 -D $(LINUX_IMAGE_PATH) $(1)/$(LINUX_IMAGE_NAME)
  430. endef
  431. endif
  432. ifeq ($(BR2_LINUX_KERNEL_INSTALL_TARGET),y)
  433. define LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET
  434. $(call LINUX_INSTALL_IMAGE,$(TARGET_DIR)/boot)
  435. $(call LINUX_INSTALL_DTB,$(TARGET_DIR)/boot)
  436. endef
  437. endif
  438. define LINUX_INSTALL_HOST_TOOLS
  439. # Installing dtc (device tree compiler) as host tool, if selected
  440. if grep -q "CONFIG_DTC=y" $(@D)/.config; then \
  441. $(INSTALL) -D -m 0755 $(@D)/scripts/dtc/dtc $(HOST_DIR)/bin/linux-dtc ; \
  442. $(if $(BR2_PACKAGE_HOST_DTC),,ln -sf linux-dtc $(HOST_DIR)/bin/dtc;) \
  443. fi
  444. endef
  445. define LINUX_INSTALL_IMAGES_CMDS
  446. $(call LINUX_INSTALL_IMAGE,$(BINARIES_DIR))
  447. $(call LINUX_INSTALL_DTB,$(BINARIES_DIR))
  448. endef
  449. ifeq ($(BR2_STRIP_strip),y)
  450. LINUX_MAKE_FLAGS += INSTALL_MOD_STRIP=1
  451. endif
  452. define LINUX_INSTALL_TARGET_CMDS
  453. $(LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET)
  454. # Install modules and remove symbolic links pointing to build
  455. # directories, not relevant on the target
  456. @if grep -q "CONFIG_MODULES=y" $(@D)/.config; then \
  457. $(LINUX_MAKE_ENV) $(MAKE1) $(LINUX_MAKE_FLAGS) -C $(@D) modules_install; \
  458. rm -f $(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED)/build ; \
  459. rm -f $(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED)/source ; \
  460. fi
  461. $(LINUX_INSTALL_HOST_TOOLS)
  462. endef
  463. # Include all our extensions.
  464. #
  465. # Note: our package infrastructure uses the full-path of the last-scanned
  466. # Makefile to determine what package we're currently defining, using the
  467. # last directory component in the path. Additionally, the full path of
  468. # the package directory is also stored in _PKGDIR (e.g. to find patches)
  469. #
  470. # As such, including other Makefiles, like below, before we call one of
  471. # the *-package macros usually doesn't work.
  472. #
  473. # However, by including the in-tree extensions after the ones from the
  474. # br2-external trees, we're back to the situation where the last Makefile
  475. # scanned *is* included from the correct directory.
  476. #
  477. # NOTE: this is very fragile, and extra care must be taken to ensure that
  478. # we always end up with an in-tree included file. That's mostly OK, because
  479. # we do have in-tree linux-extensions.
  480. #
  481. include $(sort $(wildcard $(foreach ext,$(BR2_EXTERNAL_DIRS), \
  482. $(ext)/linux/linux-ext-*.mk)))
  483. include $(sort $(wildcard linux/linux-ext-*.mk))
  484. LINUX_PATCH_DEPENDENCIES += $(foreach ext,$(LINUX_EXTENSIONS),\
  485. $(if $(BR2_LINUX_KERNEL_EXT_$(call UPPERCASE,$(ext))),$(ext)))
  486. LINUX_PRE_PATCH_HOOKS += $(foreach ext,$(LINUX_EXTENSIONS),\
  487. $(if $(BR2_LINUX_KERNEL_EXT_$(call UPPERCASE,$(ext))),\
  488. $(call UPPERCASE,$(ext))_PREPARE_KERNEL))
  489. # Checks to give errors that the user can understand
  490. # When a custom repository has been set, check for the repository version
  491. ifeq ($(BR2_LINUX_KERNEL_CUSTOM_SVN)$(BR2_LINUX_KERNEL_CUSTOM_GIT)$(BR2_LINUX_KERNEL_CUSTOM_HG),y)
  492. ifeq ($(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION)),)
  493. $(error No custom repository version set. Check your BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION setting)
  494. endif
  495. ifeq ($(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL)),)
  496. $(error No custom repo URL set. Check your BR2_LINUX_KERNEL_CUSTOM_REPO_URL setting)
  497. endif
  498. endif
  499. ifeq ($(BR_BUILDING),y)
  500. ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y)
  501. # We must use the user-supplied kconfig value, because
  502. # LINUX_KCONFIG_DEFCONFIG will at least contain the
  503. # trailing _defconfig
  504. ifeq ($(call qstrip,$(BR2_LINUX_KERNEL_DEFCONFIG)),)
  505. $(error No kernel defconfig name specified, check your BR2_LINUX_KERNEL_DEFCONFIG setting)
  506. endif
  507. endif
  508. ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG),y)
  509. ifeq ($(LINUX_KCONFIG_FILE),)
  510. $(error No kernel configuration file specified, check your BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE setting)
  511. endif
  512. endif
  513. ifeq ($(BR2_LINUX_KERNEL_DTS_SUPPORT):$(strip $(LINUX_DTS_NAME)),y:)
  514. $(error No kernel device tree source specified, check your \
  515. BR2_LINUX_KERNEL_INTREE_DTS_NAME / BR2_LINUX_KERNEL_CUSTOM_DTS_PATH settings)
  516. endif
  517. endif # BR_BUILDING
  518. $(eval $(kconfig-package))
  519. # Support for rebuilding the kernel after the cpio archive has
  520. # been generated.
  521. .PHONY: linux-rebuild-with-initramfs
  522. linux-rebuild-with-initramfs: $(LINUX_DIR)/.stamp_target_installed
  523. linux-rebuild-with-initramfs: $(LINUX_DIR)/.stamp_images_installed
  524. linux-rebuild-with-initramfs: rootfs-cpio
  525. linux-rebuild-with-initramfs:
  526. @$(call MESSAGE,"Rebuilding kernel with initramfs")
  527. # Build the kernel.
  528. $(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(LINUX_DIR) $(LINUX_TARGET_NAME)
  529. $(LINUX_APPEND_DTB)
  530. # Copy the kernel image(s) to its(their) final destination
  531. $(call LINUX_INSTALL_IMAGE,$(BINARIES_DIR))
  532. # If there is a .ub file copy it to the final destination
  533. test ! -f $(LINUX_IMAGE_PATH).ub || cp $(LINUX_IMAGE_PATH).ub $(BINARIES_DIR)