include/kernel-defaults.mk

   1 # SPDX-License-Identifier: GPL-2.0-only
   2 #
   3 # Copyright (C) 2006-2020 OpenWrt.org
   4
   5 ifdef CONFIG_STRIP_KERNEL_EXPORTS
   6   KERNEL_MAKEOPTS += \
   7         EXTRA_LDSFLAGS="-I$(KERNEL_BUILD_DIR) -include symtab.h"
   8 endif
   9
  10 INITRAMFS_EXTRA_FILES ?= $(GENERIC_PLATFORM_DIR)/image/initramfs-base-files.txt
  11
  12 ifneq (,$(KERNEL_CC))
  13   KERNEL_MAKEOPTS += CC="$(KERNEL_CC)"
  14 endif
  15
  16 export HOST_EXTRACFLAGS=-I$(STAGING_DIR_HOST)/include
  17
  18 # defined in quilt.mk
  19 Kernel/Patch:=$(Kernel/Patch/Default)
  20
  21 ifneq (,$(findstring .xz,$(LINUX_SOURCE)))
  22   LINUX_CAT:=xzcat
  23 else
  24   LINUX_CAT:=gzip -dc
  25 endif
  26
  27 ifeq ($(strip $(CONFIG_EXTERNAL_KERNEL_TREE)),"")
  28   ifeq ($(strip $(CONFIG_KERNEL_GIT_CLONE_URI)),"")
  29     define Kernel/Prepare/Default
  30         $(LINUX_CAT) $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  31         $(Kernel/Patch)
  32         $(if $(QUILT),touch $(LINUX_DIR)/.quilt_used)
  33     endef
  34   else
  35     define Kernel/Prepare/Default
  36         $(LINUX_CAT) $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  37     endef
  38   endif
  39 else
  40   define Kernel/Prepare/Default
  41         mkdir -p $(KERNEL_BUILD_DIR)
  42         if [ -d $(LINUX_DIR) ]; then \
  43                 rmdir $(LINUX_DIR); \
  44         fi
  45         ln -s $(CONFIG_EXTERNAL_KERNEL_TREE) $(LINUX_DIR)
  46         $(_SINGLE) [ -d $(LINUX_DIR)/user_headers ] && rm -rf $(LINUX_DIR)/user_headers
  47   endef
  48 endif
  49
  50 ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
  51   ifeq ($(strip $(CONFIG_EXTERNAL_CPIO)),"")
  52     define Kernel/SetInitramfs/PreConfigure
  53         grep -v -e INITRAMFS -e CONFIG_RD_ -e CONFIG_BLK_DEV_INITRD $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  54         echo 'CONFIG_BLK_DEV_INITRD=y' >> $(LINUX_DIR)/.config
  55         echo 'CONFIG_INITRAMFS_SOURCE="$(strip $(TARGET_DIR) $(INITRAMFS_EXTRA_FILES))"' >> $(LINUX_DIR)/.config
  56     endef
  57   else
  58     define Kernel/SetInitramfs/PreConfigure
  59         grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  60         echo 'CONFIG_INITRAMFS_SOURCE="$(call qstrip,$(CONFIG_EXTERNAL_CPIO))"' >> $(LINUX_DIR)/.config
  61     endef
  62   endif
  63
  64   define Kernel/SetInitramfs
  65         rm -f $(LINUX_DIR)/.config.prev
  66         mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  67         $(call Kernel/SetInitramfs/PreConfigure)
  68         echo 'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR)/.config
  69         echo 'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(LINUX_DIR)/.config
  70         echo "$(if $(CONFIG_TARGET_INITRAMFS_FORCE),CONFIG_INITRAMFS_FORCE=y,# CONFIG_INITRAMFS_FORCE is not set)" >> $(LINUX_DIR)/.config
  71         echo "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_NONE),CONFIG_INITRAMFS_COMPRESSION_NONE=y,# CONFIG_INITRAMFS_COMPRESSION_NONE is not set)" >> $(LINUX_DIR)/.config
  72         echo -e "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_GZIP),CONFIG_INITRAMFS_COMPRESSION_GZIP=y\nCONFIG_RD_GZIP=y,# CONFIG_INITRAMFS_COMPRESSION_GZIP is not set\n# CONFIG_RD_GZIP is not set)" >> $(LINUX_DIR)/.config
  73         echo -e "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_BZIP2),CONFIG_INITRAMFS_COMPRESSION_BZIP2=y\nCONFIG_RD_BZIP2=y,# CONFIG_INITRAMFS_COMPRESSION_BZIP2 is not set\n# CONFIG_RD_BZIP2 is not set)" >> $(LINUX_DIR)/.config
  74         echo -e "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZMA),CONFIG_INITRAMFS_COMPRESSION_LZMA=y\nCONFIG_RD_LZMA=y,# CONFIG_INITRAMFS_COMPRESSION_LZMA is not set\n# CONFIG_RD_LZMA is not set)" >> $(LINUX_DIR)/.config
  75         echo -e "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZO),CONFIG_INITRAMFS_COMPRESSION_LZO=y\nCONFIG_RD_LZO=y,# CONFIG_INITRAMFS_COMPRESSION_LZO is not set\n# CONFIG_RD_LZO is not set)" >> $(LINUX_DIR)/.config
  76         echo -e "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_XZ),CONFIG_INITRAMFS_COMPRESSION_XZ=y\nCONFIG_RD_XZ=y,# CONFIG_INITRAMFS_COMPRESSION_XZ is not set\n# CONFIG_RD_XZ is not set)" >> $(LINUX_DIR)/.config
  77         echo -e "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZ4),CONFIG_INITRAMFS_COMPRESSION_LZ4=y\nCONFIG_RD_LZ4=y,# CONFIG_INITRAMFS_COMPRESSION_LZ4 is not set\n# CONFIG_RD_LZ4 is not set)" >> $(LINUX_DIR)/.config
  78         echo -e "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_ZSTD),CONFIG_INITRAMFS_COMPRESSION_ZSTD=y\nCONFIG_RD_STD=y,# CONFIG_INITRAMFS_COMPRESSION_ZSTD is not set\n# CONFIG_RD_ZSTD is not set)" >> $(LINUX_DIR)/.config
  79   endef
  80 else
  81 endif
  82
  83 define Kernel/SetNoInitramfs
  84         mv $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.old
  85         grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config.set
  86         echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config.set
  87         echo '# CONFIG_INITRAMFS_FORCE is not set' >> $(LINUX_DIR)/.config.set
  88 endef
  89
  90 define Kernel/Configure/Default
  91         rm -f $(LINUX_DIR)/localversion
  92         $(LINUX_CONF_CMD) > $(LINUX_DIR)/.config.target
  93 # copy CONFIG_KERNEL_* settings over to .config.target
  94         awk '/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");print}' $(TOPDIR)/.config >> $(LINUX_DIR)/.config.target
  95         echo "# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $(LINUX_DIR)/.config.target
  96         echo "# CONFIG_KALLSYMS_ALL is not set" >> $(LINUX_DIR)/.config.target
  97         echo "CONFIG_KALLSYMS_UNCOMPRESSED=y" >> $(LINUX_DIR)/.config.target
  98         $(SCRIPT_DIR)/package-metadata.pl kconfig $(TMP_DIR)/.packageinfo $(TOPDIR)/.config $(KERNEL_PATCHVER) > $(LINUX_DIR)/.config.override
  99         $(SCRIPT_DIR)/kconfig.pl 'm+' '+' $(LINUX_DIR)/.config.target /dev/null $(LINUX_DIR)/.config.override > $(LINUX_DIR)/.config.set
 100         $(call Kernel/SetNoInitramfs)
 101         rm -rf $(KERNEL_BUILD_DIR)/modules
 102         cmp -s $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.prev || { \
 103                 cp $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config; \
 104                 cp $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.prev; \
 105         }
 106         $(_SINGLE) [ -d $(LINUX_DIR)/user_headers ] || $(KERNEL_MAKE) INSTALL_HDR_PATH=$(LINUX_DIR)/user_headers headers_install
 107         grep '=[ym]' $(LINUX_DIR)/.config.set | LC_ALL=C sort | mkhash md5 > $(LINUX_DIR)/.vermagic
 108 endef
 109
 110 define Kernel/Configure/Initramfs
 111         $(call Kernel/SetInitramfs)
 112 endef
 113
 114 define Kernel/CompileModules/Default
 115         rm -f $(LINUX_DIR)/vmlinux $(LINUX_DIR)/System.map
 116         +$(KERNEL_MAKE) modules
 117 endef
 118
 119 OBJCOPY_STRIP = -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id
 120
 121 # AMD64 shares the location with x86
 122 ifeq ($(LINUX_KARCH),x86_64)
 123 IMAGES_DIR:=../../x86/boot
 124 endif
 125
 126 define Kernel/CopyImage
 127         cmp -s $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).debug || { \
 128                 $(KERNEL_CROSS)objcopy -O binary $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)$(1); \
 129                 $(KERNEL_CROSS)objcopy $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).elf; \
 130                 $(CP) $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).debug; \
 131                 $(foreach k, \
 132                         $(if $(KERNEL_IMAGES),$(KERNEL_IMAGES),$(filter-out vmlinux dtbs,$(KERNELNAME))), \
 133                         $(CP) $(LINUX_DIR)/arch/$(LINUX_KARCH)/boot/$(IMAGES_DIR)/$(k) $(KERNEL_BUILD_DIR)/$(k)$(1); \
 134                 ) \
 135         }
 136 endef
 137
 138 define Kernel/CompileImage/Default
 139         rm -f $(TARGET_DIR)/init
 140         +$(KERNEL_MAKE) $(if $(KERNELNAME),$(KERNELNAME),all) modules
 141         $(call Kernel/CopyImage)
 142 endef
 143
 144 ifneq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),)
 145 define Kernel/CompileImage/Initramfs
 146         $(call Kernel/Configure/Initramfs)
 147         $(CP) $(GENERIC_PLATFORM_DIR)/other-files/init $(TARGET_DIR)/init
 148         $(if $(SOURCE_DATE_EPOCH),touch -hcd "@$(SOURCE_DATE_EPOCH)" $(TARGET_DIR)/init)
 149         rm -rf $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/usr/initramfs_data.cpio*
 150         +$(KERNEL_MAKE) $(if $(KERNELNAME),$(KERNELNAME),all) modules
 151         $(call Kernel/CopyImage,-initramfs)
 152 endef
 153 else
 154 define Kernel/CompileImage/Initramfs
 155 endef
 156 endif
 157
 158 define Kernel/Clean/Default
 159         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
 160         rm -f $(LINUX_KERNEL)
 161         $(_SINGLE)$(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 162 endef
 163
 164