arch/arm64/Makefile - kernel/msm.git - Git at Google

 #
 # arch/arm64/Makefile
 #
 # This file is included by the global makefile so that you can add your own
 # architecture-specific flags and dependencies.
 #
 # This file is subject to the terms and conditions of the GNU General Public
 # License.  See the file "COPYING" in the main directory of this archive
 # for more details.
 #
 # Copyright (C) 1995-2001 by Russell King

 LDFLAGS_vmlinux	:=--no-undefined -X
 CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET)
 GZFLAGS		:=-9

 ifeq ($(CONFIG_RELOCATABLE), y)
 # Pass --no-apply-dynamic-relocs to restore pre-binutils-2.27 behaviour
 # for relative relocs, since this leads to better Image compression
 # with the relocation offsets always being zero.
 LDFLAGS_vmlinux		+= -shared -Bsymbolic -z notext -z norelro \
 			$(call ld-option, --no-apply-dynamic-relocs)
 endif

 ifeq ($(CONFIG_ARM64_ERRATUM_843419),y)
   ifeq ($(call ld-option, --fix-cortex-a53-843419),)
 $(warning ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum)
   else
     ifeq ($(call gold-ifversion, -lt, 114000000, y), y)
 $(warning This version of GNU gold may generate incorrect code with --fix-cortex-a53-843419;\
 	see https://sourceware.org/bugzilla/show_bug.cgi?id=21491)
     endif
 LDFLAGS_vmlinux	+= --fix-cortex-a53-843419
   endif
 else
   ifeq ($(ld-name),gold)
 # Pass --no-fix-cortex-a53-843419 to ensure the erratum fix is disabled
 LDFLAGS	+= --no-fix-cortex-a53-843419
   endif
 endif

 KBUILD_DEFCONFIG := defconfig

 # Check for binutils support for specific extensions
 lseinstr := $(call as-instr,.arch_extension lse,-DCONFIG_AS_LSE=1)

 ifeq ($(CONFIG_ARM64_LSE_ATOMICS), y)
   ifeq ($(lseinstr),)
 $(warning LSE atomics not supported by binutils)
   endif
 endif

 ifeq ($(CONFIG_ARM64), y)
 brokengasinst := $(call as-instr,1:\n.inst 0\n.rept . - 1b\n\nnop\n.endr\n,,-DCONFIG_BROKEN_GAS_INST=1)

   ifneq ($(brokengasinst),)
 $(warning Detected assembler with broken .inst; disassembly will be unreliable)
   endif
 endif

 ifeq ($(cc-name),clang)
 # This is a workaround for https://bugs.llvm.org/show_bug.cgi?id=30792.
 # TODO: revert when this is fixed in LLVM.
 KBUILD_CFLAGS	+= -mno-implicit-float
 else
 KBUILD_CFLAGS	+= -mgeneral-regs-only
 endif

 ifeq ($(CONFIG_COMPAT_VDSO), y)
   CROSS_COMPILE_ARM32 ?= $(CONFIG_CROSS_COMPILE_ARM32:"%"=%)

   # Check that the user has provided a valid prefix for the 32-bit toolchain.
   # To prevent selecting the system $(cc-name) by default, the prefix is not
   # allowed to be empty, unlike CROSS_COMPILE. In the unlikely event that the
   # system $(cc-name) is actually the 32-bit ARM compiler to be used, the
   # variable can be set to the dirname (e.g. CROSS_COMPILE_ARM32=/usr/bin/).
   # Note: this Makefile is read both before and after regenerating the config
   # (if needed). Any warning appearing before the config has been regenerated
   # should be ignored. If the error is triggered and you set
   # CONFIG_CROSS_COMPILE_ARM32, set CROSS_COMPILE_ARM32 to an appropriate value
   # when invoking make and fix CONFIG_CROSS_COMPILE_ARM32.
   ifeq ($(CROSS_COMPILE_ARM32),)
     $(error CROSS_COMPILE_ARM32 not defined or empty, the compat vDSO will not be built)
   else ifeq ($(cc-name),clang)
     export CLANG_TRIPLE_ARM32 ?= $(CROSS_COMPILE_ARM32)
     export CLANG_TARGET_ARM32 := --target=$(notdir $(CLANG_TRIPLE_ARM32:%-=%))
     export GCC_TOOLCHAIN32_DIR := $(dir $(shell which $(CROSS_COMPILE_ARM32)ld))
     export GCC_TOOLCHAIN32 := $(realpath $(GCC_TOOLCHAIN32_DIR)/..)
     export CLANG_PREFIX32 := --prefix=$(GCC_TOOLCHAIN32_DIR)
     export CLANG_GCC32_TC := --gcc-toolchain=$(GCC_TOOLCHAIN32)
     export CONFIG_VDSO32 := y
     vdso32 := -DCONFIG_VDSO32=1
   else ifeq ($(shell which $(CROSS_COMPILE_ARM32)$(cc-name) 2> /dev/null),)
     $(error $(CROSS_COMPILE_ARM32)$(cc-name) not found, check CROSS_COMPILE_ARM32)
   else
     export CROSS_COMPILE_ARM32
     export CONFIG_VDSO32 := y
     vdso32 := -DCONFIG_VDSO32=1
   endif
 endif

 KBUILD_CFLAGS	+= $(lseinstr) $(brokengasinst) $(vdso32)
 KBUILD_CFLAGS	+= -fno-asynchronous-unwind-tables
 KBUILD_CFLAGS	+= $(call cc-option, -mpc-relative-literal-loads)
 KBUILD_CFLAGS	+= -fno-pic
 KBUILD_AFLAGS	+= $(lseinstr) $(brokengasinst) $(vdso32)

 KBUILD_CFLAGS	+= $(call cc-option,-mabi=lp64)
 KBUILD_AFLAGS	+= $(call cc-option,-mabi=lp64)

 ifeq ($(CONFIG_SHADOW_CALL_STACK), y)
 KBUILD_CFLAGS	+= -ffixed-x18
 endif

 ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
 KBUILD_CPPFLAGS	+= -mbig-endian
 CHECKFLAGS	+= -D__AARCH64EB__
 AS		+= -EB
 LD		+= -EB
 ifeq ($(ld-name),gold)
 LDFLAGS		+= -maarch64_elf64_be_vec
 else
 LDFLAGS		+= -maarch64linuxb
 endif
 UTS_MACHINE	:= aarch64_be
 else
 KBUILD_CPPFLAGS	+= -mlittle-endian
 CHECKFLAGS	+= -D__AARCH64EL__
 AS		+= -EL
 LD		+= -EL
 ifeq ($(ld-name),gold)
 LDFLAGS		+= -maarch64_elf64_le_vec
 else
 LDFLAGS		+= -maarch64linux
 endif
 UTS_MACHINE	:= aarch64
 endif

 CHECKFLAGS	+= -D__aarch64__ -m64

 ifeq ($(CONFIG_ARM64_MODULE_CMODEL_LARGE), y)
 KBUILD_CFLAGS_MODULE	+= -mcmodel=large
 ifeq ($(CONFIG_LTO_CLANG), y)
 # Code model is not stored in LLVM IR, so we need to pass it also to LLVMgold
 KBUILD_LDFLAGS_MODULE	+= -plugin-opt=-code-model=large
 endif
 endif

 ifeq ($(CONFIG_ARM64_MODULE_PLTS),y)
 KBUILD_LDFLAGS_MODULE	+= -T $(srctree)/arch/arm64/kernel/module.lds
 endif

 # Default value
 head-y		:= arch/arm64/kernel/head.o

 # The byte offset of the kernel image in RAM from the start of RAM.
 ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y)
 TEXT_OFFSET := $(shell awk "BEGIN {srand(); printf \"0x%06x\n\", \
 		 int(2 * 1024 * 1024 / (2 ^ $(CONFIG_ARM64_PAGE_SHIFT)) * \
 		 rand()) * (2 ^ $(CONFIG_ARM64_PAGE_SHIFT))}")
 else
 TEXT_OFFSET := 0x00080000
 endif

 ifeq ($(cc-name),clang)
 KBUILD_CFLAGS += $(call cc-disable-warning, asm-operand-widths)
 endif

 ifeq ($(CONFIG_KASAN_SW_TAGS), y)
 KASAN_SHADOW_SCALE_SHIFT := 4
 else
 KASAN_SHADOW_SCALE_SHIFT := 3
 endif

 KBUILD_CFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(KASAN_SHADOW_SCALE_SHIFT)
 KBUILD_CPPFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(KASAN_SHADOW_SCALE_SHIFT)
 KBUILD_AFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(KASAN_SHADOW_SCALE_SHIFT)

 # KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - KASAN_SHADOW_SCALE_SHIFT))
 #				 - (1 << (64 - KASAN_SHADOW_SCALE_SHIFT))
 # in 32-bit arithmetic
 KASAN_SHADOW_OFFSET := $(shell printf "0x%08x00000000\n" $$(( \
 	(0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS) - 32))) \
 	+ (1 << ($(CONFIG_ARM64_VA_BITS) - 32 - $(KASAN_SHADOW_SCALE_SHIFT))) \
 	- (1 << (64 - 32 - $(KASAN_SHADOW_SCALE_SHIFT))) )) )

 export	TEXT_OFFSET GZFLAGS

 core-y		+= arch/arm64/kernel/ arch/arm64/mm/
 core-$(CONFIG_NET) += arch/arm64/net/
 core-$(CONFIG_KVM) += arch/arm64/kvm/
 core-$(CONFIG_XEN) += arch/arm64/xen/
 core-$(CONFIG_CRYPTO) += arch/arm64/crypto/
 libs-y		:= arch/arm64/lib/ $(libs-y)
 core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a

 suffix_$(CONFIG_KERNEL_GZIP) = gz
 suffix_$(CONFIG_KERNEL_LZ4)  = lz4
 KBUILD_IMAGE	:= Image.$(suffix_y)


 # Default target when executing plain make
 boot		:= arch/arm64/boot
 ifeq ($(CONFIG_BUILD_ARM64_APPENDED_DTB_IMAGE),y)
 KBUILD_TARGET  := $(addsuffix -dtb,$(KBUILD_IMAGE))
 KBUILD_IMAGE	:= $(boot)/$(addsuffix -dtb,$(KBUILD_IMAGE))
 else
 KBUILD_TARGET := $(KBUILD_IMAGE)
 KBUILD_IMAGE  := $(boot)/$(KBUILD_IMAGE)
 endif

 KBUILD_DTBS	:= dtbs

 KBUILD_DTBO_IMG := dtbo.img

 ifeq ($(CONFIG_BUILD_ARM64_DT_OVERLAY),y)
 export DTC_FLAGS := -@
 endif

 all:	$(KBUILD_DTBS) $(KBUILD_TARGET)

 Image: vmlinux
 	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

 Image.%: Image
 	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

 zinstall install:
 	$(Q)$(MAKE) $(build)=$(boot) $@

 %.dtb: scripts
 	$(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@

 PHONY += dtbs dtbs_install

 dtbs: prepare scripts
 	$(Q)$(MAKE) $(build)=$(boot)/dts

 dtbs_install:
 	$(Q)$(MAKE) $(dtbinst)=$(boot)/dts

 Image-dtb: vmlinux scripts dtbs
 	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

 Image.gz-dtb: vmlinux scripts dtbs Image.gz
 	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

 Image.lz4-dtb: vmlinux scripts dtbs Image.lz4
 	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

 ifeq ($(CONFIG_BUILD_ARM64_DT_OVERLAY),y)
 $(KBUILD_DTBO_IMG): dtbs
 	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

 all: $(KBUILD_DTBO_IMG)
 endif

 PHONY += vdso_install
 vdso_install:
 	$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@

 # We use MRPROPER_FILES and CLEAN_FILES now
 archclean:
 	$(Q)$(MAKE) $(clean)=$(boot)
 	$(Q)$(MAKE) $(clean)=$(boot)/dts

 ifeq ($(KBUILD_EXTMOD),)
 # We need to generate vdso-offsets.h before compiling certain files in kernel/.
 # In order to do that, we should use the archprepare target, but we can't since
 # asm-offsets.h is included in some files used to generate vdso-offsets.h, and
 # asm-offsets.h is built in prepare0, for which archprepare is a dependency.
 # Therefore we need to generate the header after prepare0 has been made, hence
 # this hack.
 prepare: vdso_prepare
 vdso_prepare: prepare0
 	$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso include/generated/vdso-offsets.h
 	$(if $(CONFIG_VDSO32),$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso32 \
 					  include/generated/vdso32-offsets.h)
 endif

 define archhelp
   echo  '* Image.gz      - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)'
   echo  '* Image.lz4     - Compressed kernel image (arch/$(ARCH)/boot/Image.lz4)'
   echo  '  Image         - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
   echo  '* dtbs          - Build device tree blobs for enabled boards'
   echo  '  dtbs_install  - Install dtbs to $(INSTALL_DTBS_PATH)'
   echo  '  install       - Install uncompressed kernel'
   echo  '  zinstall      - Install compressed kernel'
   echo  '                  Install using (your) ~/bin/installkernel or'
   echo  '                  (distribution) /sbin/installkernel or'
   echo  '                  install to $$(INSTALL_PATH) and run lilo'
 endef
	#
	# arch/arm64/Makefile
	#
	# This file is included by the global makefile so that you can add your own
	# architecture-specific flags and dependencies.
	#
	# This file is subject to the terms and conditions of the GNU General Public
	# License. See the file "COPYING" in the main directory of this archive
	# for more details.
	#
	# Copyright (C) 1995-2001 by Russell King

	LDFLAGS_vmlinux :=--no-undefined -X
	CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET)
	GZFLAGS :=-9

	ifeq ($(CONFIG_RELOCATABLE), y)
	# Pass --no-apply-dynamic-relocs to restore pre-binutils-2.27 behaviour
	# for relative relocs, since this leads to better Image compression
	# with the relocation offsets always being zero.
	LDFLAGS_vmlinux += -shared -Bsymbolic -z notext -z norelro \
	$(call ld-option, --no-apply-dynamic-relocs)
	endif

	ifeq ($(CONFIG_ARM64_ERRATUM_843419),y)
	ifeq ($(call ld-option, --fix-cortex-a53-843419),)
	$(warning ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum)
	else
	ifeq ($(call gold-ifversion, -lt, 114000000, y), y)
	$(warning This version of GNU gold may generate incorrect code with --fix-cortex-a53-843419;\
	see https://sourceware.org/bugzilla/show_bug.cgi?id=21491)
	endif
	LDFLAGS_vmlinux += --fix-cortex-a53-843419
	endif
	else
	ifeq ($(ld-name),gold)
	# Pass --no-fix-cortex-a53-843419 to ensure the erratum fix is disabled
	LDFLAGS += --no-fix-cortex-a53-843419
	endif
	endif

	KBUILD_DEFCONFIG := defconfig

	# Check for binutils support for specific extensions
	lseinstr := $(call as-instr,.arch_extension lse,-DCONFIG_AS_LSE=1)

	ifeq ($(CONFIG_ARM64_LSE_ATOMICS), y)
	ifeq ($(lseinstr),)
	$(warning LSE atomics not supported by binutils)
	endif
	endif

	ifeq ($(CONFIG_ARM64), y)
	brokengasinst := $(call as-instr,1:\n.inst 0\n.rept . - 1b\n\nnop\n.endr\n,,-DCONFIG_BROKEN_GAS_INST=1)

	ifneq ($(brokengasinst),)
	$(warning Detected assembler with broken .inst; disassembly will be unreliable)
	endif
	endif

	ifeq ($(cc-name),clang)
	# This is a workaround for https://bugs.llvm.org/show_bug.cgi?id=30792.
	# TODO: revert when this is fixed in LLVM.
	KBUILD_CFLAGS += -mno-implicit-float
	else
	KBUILD_CFLAGS += -mgeneral-regs-only
	endif

	ifeq ($(CONFIG_COMPAT_VDSO), y)
	CROSS_COMPILE_ARM32 ?= $(CONFIG_CROSS_COMPILE_ARM32:"%"=%)

	# Check that the user has provided a valid prefix for the 32-bit toolchain.
	# To prevent selecting the system $(cc-name) by default, the prefix is not
	# allowed to be empty, unlike CROSS_COMPILE. In the unlikely event that the
	# system $(cc-name) is actually the 32-bit ARM compiler to be used, the
	# variable can be set to the dirname (e.g. CROSS_COMPILE_ARM32=/usr/bin/).
	# Note: this Makefile is read both before and after regenerating the config
	# (if needed). Any warning appearing before the config has been regenerated
	# should be ignored. If the error is triggered and you set
	# CONFIG_CROSS_COMPILE_ARM32, set CROSS_COMPILE_ARM32 to an appropriate value
	# when invoking make and fix CONFIG_CROSS_COMPILE_ARM32.
	ifeq ($(CROSS_COMPILE_ARM32),)
	$(error CROSS_COMPILE_ARM32 not defined or empty, the compat vDSO will not be built)
	else ifeq ($(cc-name),clang)
	export CLANG_TRIPLE_ARM32 ?= $(CROSS_COMPILE_ARM32)
	export CLANG_TARGET_ARM32 := --target=$(notdir $(CLANG_TRIPLE_ARM32:%-=%))
	export GCC_TOOLCHAIN32_DIR := $(dir $(shell which $(CROSS_COMPILE_ARM32)ld))
	export GCC_TOOLCHAIN32 := $(realpath $(GCC_TOOLCHAIN32_DIR)/..)
	export CLANG_PREFIX32 := --prefix=$(GCC_TOOLCHAIN32_DIR)
	export CLANG_GCC32_TC := --gcc-toolchain=$(GCC_TOOLCHAIN32)
	export CONFIG_VDSO32 := y
	vdso32 := -DCONFIG_VDSO32=1
	else ifeq ($(shell which $(CROSS_COMPILE_ARM32)$(cc-name) 2> /dev/null),)
	$(error $(CROSS_COMPILE_ARM32)$(cc-name) not found, check CROSS_COMPILE_ARM32)
	else
	export CROSS_COMPILE_ARM32
	export CONFIG_VDSO32 := y
	vdso32 := -DCONFIG_VDSO32=1
	endif
	endif

	KBUILD_CFLAGS += $(lseinstr) $(brokengasinst) $(vdso32)
	KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
	KBUILD_CFLAGS += $(call cc-option, -mpc-relative-literal-loads)
	KBUILD_CFLAGS += -fno-pic
	KBUILD_AFLAGS += $(lseinstr) $(brokengasinst) $(vdso32)

	KBUILD_CFLAGS += $(call cc-option,-mabi=lp64)
	KBUILD_AFLAGS += $(call cc-option,-mabi=lp64)

	ifeq ($(CONFIG_SHADOW_CALL_STACK), y)
	KBUILD_CFLAGS += -ffixed-x18
	endif

	ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
	KBUILD_CPPFLAGS += -mbig-endian
	CHECKFLAGS += -D__AARCH64EB__
	AS += -EB
	LD += -EB
	ifeq ($(ld-name),gold)
	LDFLAGS += -maarch64_elf64_be_vec
	else
	LDFLAGS += -maarch64linuxb
	endif
	UTS_MACHINE := aarch64_be
	else
	KBUILD_CPPFLAGS += -mlittle-endian
	CHECKFLAGS += -D__AARCH64EL__
	AS += -EL
	LD += -EL
	ifeq ($(ld-name),gold)
	LDFLAGS += -maarch64_elf64_le_vec
	else
	LDFLAGS += -maarch64linux
	endif
	UTS_MACHINE := aarch64
	endif

	CHECKFLAGS += -D__aarch64__ -m64

	ifeq ($(CONFIG_ARM64_MODULE_CMODEL_LARGE), y)
	KBUILD_CFLAGS_MODULE += -mcmodel=large
	ifeq ($(CONFIG_LTO_CLANG), y)
	# Code model is not stored in LLVM IR, so we need to pass it also to LLVMgold
	KBUILD_LDFLAGS_MODULE += -plugin-opt=-code-model=large
	endif
	endif

	ifeq ($(CONFIG_ARM64_MODULE_PLTS),y)
	KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/arm64/kernel/module.lds
	endif

	# Default value
	head-y := arch/arm64/kernel/head.o

	# The byte offset of the kernel image in RAM from the start of RAM.
	ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y)
	TEXT_OFFSET := $(shell awk "BEGIN {srand(); printf \"0x%06x\n\", \
	int(2 * 1024 * 1024 / (2 ^ $(CONFIG_ARM64_PAGE_SHIFT)) * \
	rand()) * (2 ^ $(CONFIG_ARM64_PAGE_SHIFT))}")
	else
	TEXT_OFFSET := 0x00080000
	endif

	ifeq ($(cc-name),clang)
	KBUILD_CFLAGS += $(call cc-disable-warning, asm-operand-widths)
	endif

	ifeq ($(CONFIG_KASAN_SW_TAGS), y)
	KASAN_SHADOW_SCALE_SHIFT := 4
	else
	KASAN_SHADOW_SCALE_SHIFT := 3
	endif

	KBUILD_CFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(KASAN_SHADOW_SCALE_SHIFT)
	KBUILD_CPPFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(KASAN_SHADOW_SCALE_SHIFT)
	KBUILD_AFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(KASAN_SHADOW_SCALE_SHIFT)

	# KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - KASAN_SHADOW_SCALE_SHIFT))
	# - (1 << (64 - KASAN_SHADOW_SCALE_SHIFT))
	# in 32-bit arithmetic
	KASAN_SHADOW_OFFSET := $(shell printf "0x%08x00000000\n" $$(( \
	(0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS) - 32))) \
	+ (1 << ($(CONFIG_ARM64_VA_BITS) - 32 - $(KASAN_SHADOW_SCALE_SHIFT))) \
	- (1 << (64 - 32 - $(KASAN_SHADOW_SCALE_SHIFT))) )) )

	export TEXT_OFFSET GZFLAGS

	core-y += arch/arm64/kernel/ arch/arm64/mm/
	core-$(CONFIG_NET) += arch/arm64/net/
	core-$(CONFIG_KVM) += arch/arm64/kvm/
	core-$(CONFIG_XEN) += arch/arm64/xen/
	core-$(CONFIG_CRYPTO) += arch/arm64/crypto/
	libs-y := arch/arm64/lib/ $(libs-y)
	core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a

	suffix_$(CONFIG_KERNEL_GZIP) = gz
	suffix_$(CONFIG_KERNEL_LZ4) = lz4
	KBUILD_IMAGE := Image.$(suffix_y)


	# Default target when executing plain make
	boot := arch/arm64/boot
	ifeq ($(CONFIG_BUILD_ARM64_APPENDED_DTB_IMAGE),y)
	KBUILD_TARGET := $(addsuffix -dtb,$(KBUILD_IMAGE))
	KBUILD_IMAGE := $(boot)/$(addsuffix -dtb,$(KBUILD_IMAGE))
	else
	KBUILD_TARGET := $(KBUILD_IMAGE)
	KBUILD_IMAGE := $(boot)/$(KBUILD_IMAGE)
	endif

	KBUILD_DTBS := dtbs

	KBUILD_DTBO_IMG := dtbo.img

	ifeq ($(CONFIG_BUILD_ARM64_DT_OVERLAY),y)
	export DTC_FLAGS := -@
	endif

	all: $(KBUILD_DTBS) $(KBUILD_TARGET)

	Image: vmlinux
	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

	Image.%: Image
	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

	zinstall install:
	$(Q)$(MAKE) $(build)=$(boot) $@

	%.dtb: scripts
	$(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@

	PHONY += dtbs dtbs_install

	dtbs: prepare scripts
	$(Q)$(MAKE) $(build)=$(boot)/dts

	dtbs_install:
	$(Q)$(MAKE) $(dtbinst)=$(boot)/dts

	Image-dtb: vmlinux scripts dtbs
	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

	Image.gz-dtb: vmlinux scripts dtbs Image.gz
	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

	Image.lz4-dtb: vmlinux scripts dtbs Image.lz4
	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

	ifeq ($(CONFIG_BUILD_ARM64_DT_OVERLAY),y)
	$(KBUILD_DTBO_IMG): dtbs
	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

	all: $(KBUILD_DTBO_IMG)
	endif

	PHONY += vdso_install
	vdso_install:
	$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@

	# We use MRPROPER_FILES and CLEAN_FILES now
	archclean:
	$(Q)$(MAKE) $(clean)=$(boot)
	$(Q)$(MAKE) $(clean)=$(boot)/dts

	ifeq ($(KBUILD_EXTMOD),)
	# We need to generate vdso-offsets.h before compiling certain files in kernel/.
	# In order to do that, we should use the archprepare target, but we can't since
	# asm-offsets.h is included in some files used to generate vdso-offsets.h, and
	# asm-offsets.h is built in prepare0, for which archprepare is a dependency.
	# Therefore we need to generate the header after prepare0 has been made, hence
	# this hack.
	prepare: vdso_prepare
	vdso_prepare: prepare0
	$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso include/generated/vdso-offsets.h
	$(if $(CONFIG_VDSO32),$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso32 \
	include/generated/vdso32-offsets.h)
	endif

	define archhelp
	echo '* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)'
	echo '* Image.lz4 - Compressed kernel image (arch/$(ARCH)/boot/Image.lz4)'
	echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
	echo '* dtbs - Build device tree blobs for enabled boards'
	echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'
	echo ' install - Install uncompressed kernel'
	echo ' zinstall - Install compressed kernel'
	echo ' Install using (your) ~/bin/installkernel or'
	echo ' (distribution) /sbin/installkernel or'
	echo ' install to $$(INSTALL_PATH) and run lilo'
	endef