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# 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. # LDFLAGS_vmlinux := -z norelro ifeq ($(CONFIG_RELOCATABLE),y) LDFLAGS_vmlinux += -shared -Bsymbolic -z notext --emit-relocs KBUILD_CFLAGS += -fPIE endif ifeq ($(CONFIG_DYNAMIC_FTRACE),y) LDFLAGS_vmlinux += --no-relax KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY ifeq ($(CONFIG_RISCV_ISA_C),y) CC_FLAGS_FTRACE := -fpatchable-function-entry=4 else CC_FLAGS_FTRACE := -fpatchable-function-entry=2 endif endif ifeq ($(CONFIG_CMODEL_MEDLOW),y) KBUILD_CFLAGS_MODULE += -mcmodel=medany endif export BITS ifeq ($(CONFIG_ARCH_RV64I),y) BITS := 64 UTS_MACHINE := riscv64 KBUILD_CFLAGS += -mabi=lp64 KBUILD_AFLAGS += -mabi=lp64 KBUILD_LDFLAGS += -melf64lriscv KBUILD_RUSTFLAGS += -Ctarget-cpu=generic-rv64 --target=riscv64imac-unknown-none-elf \ -Cno-redzone else BITS := 32 UTS_MACHINE := riscv32 KBUILD_CFLAGS += -mabi=ilp32 KBUILD_AFLAGS += -mabi=ilp32 KBUILD_LDFLAGS += -melf32lriscv endif ifndef CONFIG_RISCV_USE_LINKER_RELAXATION KBUILD_CFLAGS += -mno-relax KBUILD_AFLAGS += -mno-relax ifndef CONFIG_AS_IS_LLVM KBUILD_CFLAGS += -Wa,-mno-relax KBUILD_AFLAGS += -Wa,-mno-relax endif # LLVM has an issue with target-features and LTO: https://github.com/llvm/llvm-project/issues/59350 # Ensure it is aware of linker relaxation with LTO, otherwise relocations may # be incorrect: https://github.com/llvm/llvm-project/issues/65090 else ifeq ($(CONFIG_LTO_CLANG),y) KBUILD_LDFLAGS += -mllvm -mattr=+c -mllvm -mattr=+relax endif ifeq ($(CONFIG_SHADOW_CALL_STACK),y) KBUILD_LDFLAGS += --no-relax-gp endif # ISA string setting riscv-march-$(CONFIG_ARCH_RV32I) := rv32ima riscv-march-$(CONFIG_ARCH_RV64I) := rv64ima riscv-march-$(CONFIG_FPU) := $(riscv-march-y)fd riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c riscv-march-$(CONFIG_RISCV_ISA_V) := $(riscv-march-y)v ifneq ($(CONFIG_RISCV_ISA_C),y) KBUILD_RUSTFLAGS += -Ctarget-feature=-c endif ifdef CONFIG_TOOLCHAIN_NEEDS_OLD_ISA_SPEC KBUILD_CFLAGS += -Wa,-misa-spec=2.2 KBUILD_AFLAGS += -Wa,-misa-spec=2.2 else riscv-march-$(CONFIG_TOOLCHAIN_NEEDS_EXPLICIT_ZICSR_ZIFENCEI) := $(riscv-march-y)_zicsr_zifencei endif # Check if the toolchain supports Zacas riscv-march-$(CONFIG_TOOLCHAIN_HAS_ZACAS) := $(riscv-march-y)_zacas # Check if the toolchain supports Zabha riscv-march-$(CONFIG_TOOLCHAIN_HAS_ZABHA) := $(riscv-march-y)_zabha # Remove F,D,V from isa string for all. Keep extensions between "fd" and "v" by # matching non-v and non-multi-letter extensions out with the filter ([^v_]*) KBUILD_CFLAGS += -march=$(shell echo $(riscv-march-y) | sed -E 's/(rv32ima|rv64ima)fd([^v_]*)v?/\1\2/') KBUILD_AFLAGS += -march=$(riscv-march-y) # For C code built with floating-point support, exclude V but keep F and D. CC_FLAGS_FPU := -march=$(shell echo $(riscv-march-y) | sed -E 's/(rv32ima|rv64ima)([^v_]*)v?/\1\2/') KBUILD_CFLAGS += -mno-save-restore KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET) ifeq ($(CONFIG_CMODEL_MEDLOW),y) KBUILD_CFLAGS += -mcmodel=medlow endif ifeq ($(CONFIG_CMODEL_MEDANY),y) KBUILD_CFLAGS += -mcmodel=medany endif # Avoid generating .eh_frame sections. KBUILD_CFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables # The RISC-V attributes frequently cause compatibility issues and provide no # information, so just turn them off. KBUILD_CFLAGS += $(call cc-option,-mno-riscv-attribute) KBUILD_AFLAGS += $(call cc-option,-mno-riscv-attribute) KBUILD_CFLAGS += $(call as-option,-Wa$(comma)-mno-arch-attr) KBUILD_AFLAGS += $(call as-option,-Wa$(comma)-mno-arch-attr) KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax) KBUILD_AFLAGS_MODULE += $(call as-option,-Wa$(comma)-mno-relax) # GCC versions that support the "-mstrict-align" option default to allowing # unaligned accesses. While unaligned accesses are explicitly allowed in the # RISC-V ISA, they're emulated by machine mode traps on all extant # architectures. It's faster to have GCC emit only aligned accesses. ifneq ($(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS),y) KBUILD_CFLAGS += $(call cc-option,-mstrict-align) endif ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y) prepare: stack_protector_prepare stack_protector_prepare: prepare0 $(eval KBUILD_CFLAGS += -mstack-protector-guard=tls \ -mstack-protector-guard-reg=tp \ -mstack-protector-guard-offset=$(shell \ awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \ $(objtree)/include/generated/asm-offsets.h)) endif # arch specific predefines for sparse CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS) # Default target when executing plain make boot := arch/riscv/boot ifeq ($(CONFIG_XIP_KERNEL),y) KBUILD_IMAGE := $(boot)/xipImage else ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_CANAAN_K210),yy) KBUILD_IMAGE := $(boot)/loader.bin else ifeq ($(CONFIG_EFI_ZBOOT),) KBUILD_IMAGE := $(boot)/Image.gz else KBUILD_IMAGE := $(boot)/vmlinuz.efi endif endif endif boot := arch/riscv/boot boot-image-y := Image boot-image-$(CONFIG_KERNEL_BZIP2) := Image.bz2 boot-image-$(CONFIG_KERNEL_GZIP) := Image.gz boot-image-$(CONFIG_KERNEL_LZ4) := Image.lz4 boot-image-$(CONFIG_KERNEL_LZMA) := Image.lzma boot-image-$(CONFIG_KERNEL_LZO) := Image.lzo boot-image-$(CONFIG_KERNEL_ZSTD) := Image.zst boot-image-$(CONFIG_KERNEL_XZ) := Image.xz ifdef CONFIG_RISCV_M_MODE boot-image-$(CONFIG_ARCH_CANAAN) := loader.bin endif boot-image-$(CONFIG_EFI_ZBOOT) := vmlinuz.efi boot-image-$(CONFIG_XIP_KERNEL) := xipImage KBUILD_IMAGE := $(boot)/$(boot-image-y) libs-y += arch/riscv/lib/ libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a ifeq ($(KBUILD_EXTMOD),) ifeq ($(CONFIG_MMU),y) prepare: vdso_prepare vdso_prepare: prepare0 $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso include/generated/vdso-offsets.h $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \ $(build)=arch/riscv/kernel/compat_vdso include/generated/compat_vdso-offsets.h) endif endif vdso-install-y += arch/riscv/kernel/vdso/vdso.so.dbg vdso-install-$(CONFIG_COMPAT) += arch/riscv/kernel/compat_vdso/compat_vdso.so.dbg BOOT_TARGETS := Image Image.gz Image.bz2 Image.lz4 Image.lzma Image.lzo Image.zst Image.xz loader loader.bin xipImage vmlinuz.efi all: $(notdir $(KBUILD_IMAGE)) loader.bin: loader Image.gz Image.bz2 Image.lz4 Image.lzma Image.lzo Image.zst Image.xz loader xipImage vmlinuz.efi: Image $(BOOT_TARGETS): vmlinux $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ @$(kecho) ' Kernel: $(boot)/$@ is ready' # the install target always installs KBUILD_IMAGE (which may be compressed) # but keep the zinstall target for compatibility with older releases install zinstall: $(call cmd,install) PHONY += rv32_randconfig rv32_randconfig: $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/riscv/configs/32-bit.config \ -f $(srctree)/Makefile randconfig PHONY += rv64_randconfig rv64_randconfig: $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/riscv/configs/64-bit.config \ -f $(srctree)/Makefile randconfig PHONY += rv32_defconfig rv32_defconfig: $(Q)$(MAKE) -f $(srctree)/Makefile defconfig 32-bit.config PHONY += rv32_nommu_virt_defconfig rv32_nommu_virt_defconfig: $(Q)$(MAKE) -f $(srctree)/Makefile nommu_virt_defconfig 32-bit.config define archhelp echo ' Image - Uncompressed kernel image (arch/riscv/boot/Image)' echo ' Image.gz - Compressed kernel image (arch/riscv/boot/Image.gz)' echo ' Image.bz2 - Compressed kernel image (arch/riscv/boot/Image.bz2)' echo ' Image.lz4 - Compressed kernel image (arch/riscv/boot/Image.lz4)' echo ' Image.lzma - Compressed kernel image (arch/riscv/boot/Image.lzma)' echo ' Image.lzo - Compressed kernel image (arch/riscv/boot/Image.lzo)' echo ' Image.zst - Compressed kernel image (arch/riscv/boot/Image.zst)' echo ' Image.xz - Compressed kernel image (arch/riscv/boot/Image.xz)' echo ' vmlinuz.efi - Compressed EFI kernel image (arch/riscv/boot/vmlinuz.efi)' echo ' Default when CONFIG_EFI_ZBOOT=y' echo ' xipImage - Execute-in-place kernel image (arch/riscv/boot/xipImage)' echo ' Default when CONFIG_XIP_KERNEL=y' echo ' install - Install kernel using (your) ~/bin/$(INSTALLKERNEL) or' echo ' (distribution) /sbin/$(INSTALLKERNEL) or install to ' echo ' $$(INSTALL_PATH)' endef