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_IMAGE += \
   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         if [ -d $(LINUX_DIR)/user_headers ]; then \
  47                 rm -rf $(LINUX_DIR)/user_headers; \
  48         fi
  49   endef
  50 endif
  51
  52 ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
  53   ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS_SEPARATE),y)
  54     define Kernel/SetInitramfs/PreConfigure
  55         grep -v -e CONFIG_BLK_DEV_INITRD $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  56         echo 'CONFIG_BLK_DEV_INITRD=y' >> $(LINUX_DIR)/.config
  57         echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config
  58     endef
  59   else
  60   ifeq ($(strip $(CONFIG_EXTERNAL_CPIO)),"")
  61     define Kernel/SetInitramfs/PreConfigure
  62         grep -v -e INITRAMFS -e CONFIG_RD_ -e CONFIG_BLK_DEV_INITRD $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  63         echo 'CONFIG_BLK_DEV_INITRD=y' >> $(LINUX_DIR)/.config
  64         echo 'CONFIG_INITRAMFS_SOURCE="$(strip $(TARGET_DIR) $(INITRAMFS_EXTRA_FILES))"' >> $(LINUX_DIR)/.config
  65     endef
  66   else
  67     define Kernel/SetInitramfs/PreConfigure
  68         grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  69         echo 'CONFIG_INITRAMFS_SOURCE="$(call qstrip,$(CONFIG_EXTERNAL_CPIO))"' >> $(LINUX_DIR)/.config
  70     endef
  71   endif
  72 endif
  73
  74   define Kernel/SetInitramfs
  75         rm -f $(LINUX_DIR)/.config.prev
  76         mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  77         $(call Kernel/SetInitramfs/PreConfigure)
  78   ifneq ($(CONFIG_TARGET_ROOTFS_INITRAMFS_SEPARATE),y)
  79         echo 'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR)/.config
  80         echo 'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(LINUX_DIR)/.config
  81         echo "$(if $(CONFIG_TARGET_INITRAMFS_FORCE),CONFIG_INITRAMFS_FORCE=y,# CONFIG_INITRAMFS_FORCE is not set)" >> $(LINUX_DIR)/.config
  82   else
  83         echo "# CONFIG_INITRAMFS_FORCE is not set" >> $(LINUX_DIR)/.config
  84   endif
  85         echo "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_NONE),CONFIG_INITRAMFS_COMPRESSION_NONE=y,# CONFIG_INITRAMFS_COMPRESSION_NONE is not set)" >> $(LINUX_DIR)/.config
  86         echo -e "$(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)" >> $(LINUX_DIR)/.config
  87         echo -e "$(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)" >> $(LINUX_DIR)/.config
  88         echo -e "$(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)" >> $(LINUX_DIR)/.config
  89         echo -e "$(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)" >> $(LINUX_DIR)/.config
  90         echo -e "$(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)" >> $(LINUX_DIR)/.config
  91         echo -e "$(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)" >> $(LINUX_DIR)/.config
  92         echo -e "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_ZSTD),CONFIG_INITRAMFS_COMPRESSION_ZSTD=y\nCONFIG_RD_ZSTD=y,# CONFIG_INITRAMFS_COMPRESSION_ZSTD is not set\n# CONFIG_RD_ZSTD is not set)" >> $(LINUX_DIR)/.config
  93   endef
  94 else
  95 endif
  96
  97 define Kernel/SetNoInitramfs
  98         mv $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.old
  99         grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config.set
 100         echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config.set
 101         echo '# CONFIG_INITRAMFS_FORCE is not set' >> $(LINUX_DIR)/.config.set
 102 endef
 103
 104 define Kernel/Configure/Default
 105         rm -f $(LINUX_DIR)/localversion
 106         $(LINUX_CONF_CMD) > $(LINUX_DIR)/.config.target
 107 # copy CONFIG_KERNEL_* settings over to .config.target
 108         awk '/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");print}' $(TOPDIR)/.config >> $(LINUX_DIR)/.config.target
 109         echo "# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $(LINUX_DIR)/.config.target
 110         echo "# CONFIG_KALLSYMS_ALL is not set" >> $(LINUX_DIR)/.config.target
 111         echo "CONFIG_KALLSYMS_UNCOMPRESSED=y" >> $(LINUX_DIR)/.config.target
 112         $(SCRIPT_DIR)/package-metadata.pl kconfig $(TMP_DIR)/.packageinfo $(TOPDIR)/.config $(KERNEL_PATCHVER) > $(LINUX_DIR)/.config.override
 113         $(SCRIPT_DIR)/kconfig.pl 'm+' '+' $(LINUX_DIR)/.config.target /dev/null $(LINUX_DIR)/.config.override > $(LINUX_DIR)/.config.set
 114         $(call Kernel/SetNoInitramfs)
 115         rm -rf $(KERNEL_BUILD_DIR)/modules
 116         cmp -s $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.prev || { \
 117                 cp $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config; \
 118                 cp $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.prev; \
 119         }
 120         $(_SINGLE) [ -d $(LINUX_DIR)/user_headers ] || $(KERNEL_MAKE) INSTALL_HDR_PATH=$(LINUX_DIR)/user_headers headers_install
 121         grep '=[ym]' $(LINUX_DIR)/.config.set | LC_ALL=C sort | $(MKHASH) md5 > $(LINUX_DIR)/.vermagic
 122 endef
 123
 124 define Kernel/Configure/Initramfs
 125         $(call Kernel/SetInitramfs)
 126 endef
 127
 128 define Kernel/CompileModules/Default
 129         rm -f $(LINUX_DIR)/vmlinux $(LINUX_DIR)/System.map
 130         +$(KERNEL_MAKE) $(if $(KERNELNAME),$(KERNELNAME),all) modules
 131         # If .config did not change, use the previous timestamp to avoid package rebuilds
 132         cmp -s $(LINUX_DIR)/.config $(LINUX_DIR)/.config.modules.save && \
 133                 mv $(LINUX_DIR)/.config.modules.save $(LINUX_DIR)/.config; \
 134         $(CP) $(LINUX_DIR)/.config $(LINUX_DIR)/.config.modules.save
 135 endef
 136
 137 OBJCOPY_STRIP = -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id
 138
 139 # AMD64 shares the location with x86
 140 ifeq ($(LINUX_KARCH),x86_64)
 141 IMAGES_DIR:=../../x86/boot
 142 endif
 143
 144 define Kernel/CopyImage
 145         cmp -s $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).debug || { \
 146                 $(KERNEL_CROSS)objcopy -O binary $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)$(1); \
 147                 $(KERNEL_CROSS)objcopy $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).elf; \
 148                 $(CP) $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).debug; \
 149                 $(foreach k, \
 150                         $(if $(KERNEL_IMAGES),$(KERNEL_IMAGES),$(filter-out vmlinux dtbs,$(KERNELNAME))), \
 151                         $(CP) $(LINUX_DIR)/arch/$(LINUX_KARCH)/boot/$(IMAGES_DIR)/$(k) $(KERNEL_BUILD_DIR)/$(k)$(1); \
 152                 ) \
 153         }
 154 endef
 155
 156 # Always add "modules" so a proper Module.symvers file is written that
 157 # also contains symbols from the kernel modules. Without these symbols
 158 # external packages that depend on exported symbols from kernel modules
 159 # will fail to build.
 160 define Kernel/CompileImage/Default
 161         rm -f $(TARGET_DIR)/init
 162         +$(KERNEL_MAKE) $(KERNEL_MAKEOPTS_IMAGE) $(if $(KERNELNAME),$(KERNELNAME),all) modules
 163         $(call Kernel/CopyImage)
 164 endef
 165
 166 # Here as well, always add "modules", see comment above.
 167 ifneq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),)
 168 define Kernel/CompileImage/Initramfs
 169         $(call Kernel/Configure/Initramfs)
 170         $(CP) $(GENERIC_PLATFORM_DIR)/other-files/init $(TARGET_DIR)/init
 171         $(if $(SOURCE_DATE_EPOCH),touch -hcd "@$(SOURCE_DATE_EPOCH)" $(TARGET_DIR)/init)
 172         rm -rf $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/usr/initramfs_data.cpio*
 173 ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS_SEPARATE),y)
 174 ifneq ($(qstrip $(CONFIG_EXTERNAL_CPIO)),)
 175         $(CP) $(CONFIG_EXTERNAL_CPIO) $(KERNEL_BUILD_DIR)/initrd.cpio
 176 else
 177         ( cd $(TARGET_DIR); find . | $(STAGING_DIR_HOST)/bin/cpio -o -H newc -R 0:0 > $(KERNEL_BUILD_DIR)/initrd.cpio )
 178 endif
 179         $(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_BZIP2),bzip2 -9 -c < $(KERNEL_BUILD_DIR)/initrd.cpio > $(KERNEL_BUILD_DIR)/initrd.cpio.bzip2)
 180         $(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_GZIP),gzip -f -S .gzip -9n $(KERNEL_BUILD_DIR)/initrd.cpio)
 181         $(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZMA),$(STAGING_DIR_HOST)/bin/lzma e -lc1 -lp2 -pb2 $(KERNEL_BUILD_DIR)/initrd.cpio $(KERNEL_BUILD_DIR)/initrd.cpio.lzma)
 182 # ?     $(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZO),)
 183         $(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_XZ),$(STAGING_DIR_HOST)/bin/xz -9 -fz --check=crc32 $(KERNEL_BUILD_DIR)/initrd.cpio)
 184 # ?     $(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZ4),)
 185         $(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_ZSTD),$(STAGING_DIR_HOST)/bin/zstd -T0 -f -o $(KERNEL_BUILD_DIR)/initrd.cpio.zstd $(KERNEL_BUILD_DIR)/initrd.cpio)
 186 endif
 187         +$(KERNEL_MAKE) $(KERNEL_MAKEOPTS_IMAGE) $(if $(KERNELNAME),$(KERNELNAME),all) modules
 188         $(call Kernel/CopyImage,-initramfs)
 189 endef
 190 else
 191 define Kernel/CompileImage/Initramfs
 192 endef
 193 endif
 194
 195 define Kernel/Clean/Default
 196         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
 197         rm -f $(LINUX_KERNEL)
 198         $(_SINGLE)$(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 199 endef