diff options
Diffstat (limited to 'arch/riscv/Makefile')
| -rw-r--r-- | arch/riscv/Makefile | 177 |
1 files changed, 132 insertions, 45 deletions
diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile index bc74afdbf31e..4c6de57f65ef 100644 --- a/arch/riscv/Makefile +++ b/arch/riscv/Makefile @@ -1,19 +1,24 @@ # This file is included by the global makefile so that you can add your own -# architecture-specific flags and dependencies. Remember to do have actions -# for "archclean" and "archdep" for cleaning up and making dependencies for -# this architecture +# 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. # -OBJCOPYFLAGS := -O binary -LDFLAGS_vmlinux := +LDFLAGS_vmlinux := -z norelro +ifeq ($(CONFIG_RELOCATABLE),y) + LDFLAGS_vmlinux += -shared -Bsymbolic -z notext + KBUILD_CFLAGS += -fPIE +endif ifeq ($(CONFIG_DYNAMIC_FTRACE),y) - LDFLAGS_vmlinux := --no-relax + LDFLAGS_vmlinux += --no-relax KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY - CC_FLAGS_FTRACE := -fpatchable-function-entry=8 +ifeq ($(CONFIG_RISCV_ISA_C),y) + CC_FLAGS_FTRACE := -fpatchable-function-entry=8,4 +else + CC_FLAGS_FTRACE := -fpatchable-function-entry=4,2 +endif endif ifeq ($(CONFIG_CMODEL_MEDLOW),y) @@ -29,6 +34,9 @@ ifeq ($(CONFIG_ARCH_RV64I),y) KBUILD_AFLAGS += -mabi=lp64 KBUILD_LDFLAGS += -melf64lriscv + + KBUILD_RUSTFLAGS += -Ctarget-cpu=generic-rv64 --target=riscv64imac-unknown-none-elf \ + -Cno-redzone else BITS := 32 UTS_MACHINE := riscv32 @@ -38,13 +46,15 @@ else KBUILD_LDFLAGS += -melf32lriscv endif -ifeq ($(CONFIG_LD_IS_LLD),y) - KBUILD_CFLAGS += -mno-relax - KBUILD_AFLAGS += -mno-relax -ifneq ($(LLVM_IAS),1) - KBUILD_CFLAGS += -Wa,-mno-relax - KBUILD_AFLAGS += -Wa,-mno-relax +# LLVM has an issue with target-features and LTO: https://github.com/llvm/llvm-project/issues/59350 +# Ensure it is aware of linker relaxation with LTO, otherwise relocations may +# be incorrect: https://github.com/llvm/llvm-project/issues/65090 +ifeq ($(CONFIG_LTO_CLANG),y) + KBUILD_LDFLAGS += -mllvm -mattr=+c -mllvm -mattr=+relax endif + +ifeq ($(CONFIG_SHADOW_CALL_STACK),y) + KBUILD_LDFLAGS += --no-relax-gp endif # ISA string setting @@ -52,11 +62,35 @@ riscv-march-$(CONFIG_ARCH_RV32I) := rv32ima riscv-march-$(CONFIG_ARCH_RV64I) := rv64ima riscv-march-$(CONFIG_FPU) := $(riscv-march-y)fd riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c -KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y)) +riscv-march-$(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 ($(CONFIG_CMODEL_MEDLOW),y) KBUILD_CFLAGS += -mcmodel=medlow @@ -64,17 +98,27 @@ endif ifeq ($(CONFIG_CMODEL_MEDANY),y) KBUILD_CFLAGS += -mcmodel=medany endif -ifeq ($(CONFIG_PERF_EVENTS),y) - KBUILD_CFLAGS += -fno-omit-frame-pointer -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 @@ -83,51 +127,94 @@ stack_protector_prepare: prepare0 -mstack-protector-guard-reg=tp \ -mstack-protector-guard-offset=$(shell \ awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \ - include/generated/asm-offsets.h)) + $(objtree)/include/generated/asm-offsets.h)) endif # arch specific predefines for sparse CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS) # Default target when executing plain make -boot := arch/riscv/boot -ifeq ($(CONFIG_XIP_KERNEL),y) -KBUILD_IMAGE := $(boot)/xipImage -else -KBUILD_IMAGE := $(boot)/Image.gz +boot := arch/riscv/boot +boot-image-y := Image +boot-image-$(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-$(CONFIG_SOC_CANAAN_K210) := loader.bin endif - -head-y := arch/riscv/kernel/head.o - -core-$(CONFIG_RISCV_ERRATA_ALTERNATIVE) += arch/riscv/errata/ +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 -PHONY += vdso_install -vdso_install: - $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@ +ifeq ($(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) \ + $(build)=arch/riscv/kernel/compat_vdso include/generated/compat_vdso-offsets.h) -ifneq ($(CONFIG_XIP_KERNEL),y) -ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_CANAAN),yy) -KBUILD_IMAGE := $(boot)/loader.bin -else -KBUILD_IMAGE := $(boot)/Image.gz endif endif -BOOT_TARGETS := Image Image.gz loader loader.bin xipImage + +vdso-install-y += arch/riscv/kernel/vdso/vdso.so.dbg +vdso-install-$(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' -Image.%: Image - $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ - -zinstall install: - $(Q)$(MAKE) $(build)=$(boot) $@ - -archclean: - $(Q)$(MAKE) $(clean)=$(boot) +# 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 |