mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2025-01-10 07:00:48 +00:00
6da111574b
If we're going to provide the encoding for 'pause' in cpu_relax() anyway, then we can drop the toolchain checks and just always use it. The advantage of doing this is that other code that need pause don't need to also define it (yes, another use is coming). Add the definition to insn-def.h since it's an instruction definition and also because insn-def.h doesn't include much, so it's safe to include from asm/vdso/processor.h without concern for circular dependencies. Signed-off-by: Andrew Jones <ajones@ventanamicro.com> Link: https://lore.kernel.org/r/20240426100820.14762-9-ajones@ventanamicro.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
199 lines
6.0 KiB
Makefile
199 lines
6.0 KiB
Makefile
# This file is included by the global makefile so that you can add your own
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# architecture-specific flags and dependencies.
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#
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# This file is subject to the terms and conditions of the GNU General Public
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# License. See the file "COPYING" in the main directory of this archive
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# for more details.
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#
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LDFLAGS_vmlinux := -z norelro
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ifeq ($(CONFIG_RELOCATABLE),y)
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LDFLAGS_vmlinux += -shared -Bsymbolic -z notext --emit-relocs
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KBUILD_CFLAGS += -fPIE
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endif
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ifeq ($(CONFIG_DYNAMIC_FTRACE),y)
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LDFLAGS_vmlinux += --no-relax
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KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY
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ifeq ($(CONFIG_RISCV_ISA_C),y)
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CC_FLAGS_FTRACE := -fpatchable-function-entry=4
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else
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CC_FLAGS_FTRACE := -fpatchable-function-entry=2
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endif
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endif
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ifeq ($(CONFIG_CMODEL_MEDLOW),y)
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KBUILD_CFLAGS_MODULE += -mcmodel=medany
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endif
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export BITS
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ifeq ($(CONFIG_ARCH_RV64I),y)
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BITS := 64
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UTS_MACHINE := riscv64
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KBUILD_CFLAGS += -mabi=lp64
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KBUILD_AFLAGS += -mabi=lp64
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KBUILD_LDFLAGS += -melf64lriscv
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else
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BITS := 32
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UTS_MACHINE := riscv32
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KBUILD_CFLAGS += -mabi=ilp32
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KBUILD_AFLAGS += -mabi=ilp32
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KBUILD_LDFLAGS += -melf32lriscv
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endif
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ifndef CONFIG_RISCV_USE_LINKER_RELAXATION
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KBUILD_CFLAGS += -mno-relax
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KBUILD_AFLAGS += -mno-relax
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ifndef CONFIG_AS_IS_LLVM
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KBUILD_CFLAGS += -Wa,-mno-relax
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KBUILD_AFLAGS += -Wa,-mno-relax
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endif
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# LLVM has an issue with target-features and LTO: https://github.com/llvm/llvm-project/issues/59350
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# Ensure it is aware of linker relaxation with LTO, otherwise relocations may
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# be incorrect: https://github.com/llvm/llvm-project/issues/65090
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else ifeq ($(CONFIG_LTO_CLANG),y)
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KBUILD_LDFLAGS += -mllvm -mattr=+c -mllvm -mattr=+relax
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endif
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ifeq ($(CONFIG_SHADOW_CALL_STACK),y)
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KBUILD_LDFLAGS += --no-relax-gp
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endif
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# ISA string setting
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riscv-march-$(CONFIG_ARCH_RV32I) := rv32ima
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riscv-march-$(CONFIG_ARCH_RV64I) := rv64ima
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riscv-march-$(CONFIG_FPU) := $(riscv-march-y)fd
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riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c
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riscv-march-$(CONFIG_RISCV_ISA_V) := $(riscv-march-y)v
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ifdef CONFIG_TOOLCHAIN_NEEDS_OLD_ISA_SPEC
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KBUILD_CFLAGS += -Wa,-misa-spec=2.2
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KBUILD_AFLAGS += -Wa,-misa-spec=2.2
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else
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riscv-march-$(CONFIG_TOOLCHAIN_NEEDS_EXPLICIT_ZICSR_ZIFENCEI) := $(riscv-march-y)_zicsr_zifencei
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endif
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# Remove F,D,V from isa string for all. Keep extensions between "fd" and "v" by
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# matching non-v and non-multi-letter extensions out with the filter ([^v_]*)
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KBUILD_CFLAGS += -march=$(shell echo $(riscv-march-y) | sed -E 's/(rv32ima|rv64ima)fd([^v_]*)v?/\1\2/')
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KBUILD_AFLAGS += -march=$(riscv-march-y)
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KBUILD_CFLAGS += -mno-save-restore
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KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET)
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ifeq ($(CONFIG_CMODEL_MEDLOW),y)
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KBUILD_CFLAGS += -mcmodel=medlow
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endif
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ifeq ($(CONFIG_CMODEL_MEDANY),y)
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KBUILD_CFLAGS += -mcmodel=medany
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endif
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# Avoid generating .eh_frame sections.
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KBUILD_CFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables
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# The RISC-V attributes frequently cause compatibility issues and provide no
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# information, so just turn them off.
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KBUILD_CFLAGS += $(call cc-option,-mno-riscv-attribute)
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KBUILD_AFLAGS += $(call cc-option,-mno-riscv-attribute)
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KBUILD_CFLAGS += $(call as-option,-Wa$(comma)-mno-arch-attr)
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KBUILD_AFLAGS += $(call as-option,-Wa$(comma)-mno-arch-attr)
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KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax)
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KBUILD_AFLAGS_MODULE += $(call as-option,-Wa$(comma)-mno-relax)
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# GCC versions that support the "-mstrict-align" option default to allowing
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# unaligned accesses. While unaligned accesses are explicitly allowed in the
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# RISC-V ISA, they're emulated by machine mode traps on all extant
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# architectures. It's faster to have GCC emit only aligned accesses.
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ifneq ($(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS),y)
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KBUILD_CFLAGS += $(call cc-option,-mstrict-align)
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endif
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ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
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prepare: stack_protector_prepare
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stack_protector_prepare: prepare0
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$(eval KBUILD_CFLAGS += -mstack-protector-guard=tls \
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-mstack-protector-guard-reg=tp \
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-mstack-protector-guard-offset=$(shell \
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awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \
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include/generated/asm-offsets.h))
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endif
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# arch specific predefines for sparse
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CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS)
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# Default target when executing plain make
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boot := arch/riscv/boot
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ifeq ($(CONFIG_XIP_KERNEL),y)
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KBUILD_IMAGE := $(boot)/xipImage
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else
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KBUILD_IMAGE := $(boot)/Image.gz
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endif
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libs-y += arch/riscv/lib/
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libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
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ifeq ($(KBUILD_EXTMOD),)
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ifeq ($(CONFIG_MMU),y)
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prepare: vdso_prepare
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vdso_prepare: prepare0
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$(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso include/generated/vdso-offsets.h
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$(if $(CONFIG_COMPAT),$(Q)$(MAKE) \
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$(build)=arch/riscv/kernel/compat_vdso include/generated/compat_vdso-offsets.h)
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endif
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endif
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vdso-install-y += arch/riscv/kernel/vdso/vdso.so.dbg
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vdso-install-$(CONFIG_COMPAT) += arch/riscv/kernel/compat_vdso/compat_vdso.so.dbg:../compat_vdso/compat_vdso.so
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ifneq ($(CONFIG_XIP_KERNEL),y)
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ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_ARCH_CANAAN),yy)
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KBUILD_IMAGE := $(boot)/loader.bin
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else
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ifeq ($(CONFIG_EFI_ZBOOT),)
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KBUILD_IMAGE := $(boot)/Image.gz
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else
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KBUILD_IMAGE := $(boot)/vmlinuz.efi
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endif
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endif
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endif
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BOOT_TARGETS := Image Image.gz loader loader.bin xipImage vmlinuz.efi
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all: $(notdir $(KBUILD_IMAGE))
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loader.bin: loader
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Image.gz loader vmlinuz.efi: Image
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$(BOOT_TARGETS): vmlinux
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$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
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@$(kecho) ' Kernel: $(boot)/$@ is ready'
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Image.%: Image
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$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
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install: KBUILD_IMAGE := $(boot)/Image
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zinstall: KBUILD_IMAGE := $(boot)/Image.gz
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install zinstall:
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$(call cmd,install)
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PHONY += rv32_randconfig
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rv32_randconfig:
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$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/riscv/configs/32-bit.config \
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-f $(srctree)/Makefile randconfig
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PHONY += rv64_randconfig
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rv64_randconfig:
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$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/riscv/configs/64-bit.config \
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-f $(srctree)/Makefile randconfig
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PHONY += rv32_defconfig
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rv32_defconfig:
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$(Q)$(MAKE) -f $(srctree)/Makefile defconfig 32-bit.config
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PHONY += rv32_nommu_virt_defconfig
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rv32_nommu_virt_defconfig:
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$(Q)$(MAKE) -f $(srctree)/Makefile nommu_virt_defconfig 32-bit.config
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