1 # This file is included by the global makefile so that you can add your own
2 # architecture-specific flags and dependencies.
4 # This file is subject to the terms and conditions of the GNU General Public
5 # License. See the file "COPYING" in the main directory of this archive
9 LDFLAGS_vmlinux := -z norelro
10 ifeq ($(CONFIG_RELOCATABLE),y)
11 LDFLAGS_vmlinux += -shared -Bsymbolic -z notext --emit-relocs
12 KBUILD_CFLAGS += -fPIE
14 ifeq ($(CONFIG_DYNAMIC_FTRACE),y)
15 LDFLAGS_vmlinux += --no-relax
16 KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY
17 ifeq ($(CONFIG_RISCV_ISA_C),y)
18 CC_FLAGS_FTRACE := -fpatchable-function-entry=4
20 CC_FLAGS_FTRACE := -fpatchable-function-entry=2
24 ifeq ($(CONFIG_CMODEL_MEDLOW),y)
25 KBUILD_CFLAGS_MODULE += -mcmodel=medany
29 ifeq ($(CONFIG_ARCH_RV64I),y)
31 UTS_MACHINE := riscv64
33 KBUILD_CFLAGS += -mabi=lp64
34 KBUILD_AFLAGS += -mabi=lp64
36 KBUILD_LDFLAGS += -melf64lriscv
39 UTS_MACHINE := riscv32
41 KBUILD_CFLAGS += -mabi=ilp32
42 KBUILD_AFLAGS += -mabi=ilp32
43 KBUILD_LDFLAGS += -melf32lriscv
46 ifeq ($(CONFIG_LD_IS_LLD),y)
47 ifeq ($(call test-lt, $(CONFIG_LLD_VERSION), 150000),y)
48 KBUILD_CFLAGS += -mno-relax
49 KBUILD_AFLAGS += -mno-relax
50 ifndef CONFIG_AS_IS_LLVM
51 KBUILD_CFLAGS += -Wa,-mno-relax
52 KBUILD_AFLAGS += -Wa,-mno-relax
58 riscv-march-$(CONFIG_ARCH_RV32I) := rv32ima
59 riscv-march-$(CONFIG_ARCH_RV64I) := rv64ima
60 riscv-march-$(CONFIG_FPU) := $(riscv-march-y)fd
61 riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c
62 riscv-march-$(CONFIG_RISCV_ISA_V) := $(riscv-march-y)v
64 ifdef CONFIG_TOOLCHAIN_NEEDS_OLD_ISA_SPEC
65 KBUILD_CFLAGS += -Wa,-misa-spec=2.2
66 KBUILD_AFLAGS += -Wa,-misa-spec=2.2
68 riscv-march-$(CONFIG_TOOLCHAIN_NEEDS_EXPLICIT_ZICSR_ZIFENCEI) := $(riscv-march-y)_zicsr_zifencei
71 # Check if the toolchain supports Zihintpause extension
72 riscv-march-$(CONFIG_TOOLCHAIN_HAS_ZIHINTPAUSE) := $(riscv-march-y)_zihintpause
74 # Remove F,D,V from isa string for all. Keep extensions between "fd" and "v" by
75 # matching non-v and non-multi-letter extensions out with the filter ([^v_]*)
76 KBUILD_CFLAGS += -march=$(shell echo $(riscv-march-y) | sed -E 's/(rv32ima|rv64ima)fd([^v_]*)v?/\1\2/')
78 KBUILD_AFLAGS += -march=$(riscv-march-y)
80 KBUILD_CFLAGS += -mno-save-restore
81 KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET)
83 ifeq ($(CONFIG_CMODEL_MEDLOW),y)
84 KBUILD_CFLAGS += -mcmodel=medlow
86 ifeq ($(CONFIG_CMODEL_MEDANY),y)
87 KBUILD_CFLAGS += -mcmodel=medany
90 # Avoid generating .eh_frame sections.
91 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables
93 # The RISC-V attributes frequently cause compatibility issues and provide no
94 # information, so just turn them off.
95 KBUILD_CFLAGS += $(call cc-option,-mno-riscv-attribute)
96 KBUILD_AFLAGS += $(call cc-option,-mno-riscv-attribute)
97 KBUILD_CFLAGS += $(call as-option,-Wa$(comma)-mno-arch-attr)
98 KBUILD_AFLAGS += $(call as-option,-Wa$(comma)-mno-arch-attr)
100 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax)
101 KBUILD_AFLAGS_MODULE += $(call as-option,-Wa$(comma)-mno-relax)
103 # GCC versions that support the "-mstrict-align" option default to allowing
104 # unaligned accesses. While unaligned accesses are explicitly allowed in the
105 # RISC-V ISA, they're emulated by machine mode traps on all extant
106 # architectures. It's faster to have GCC emit only aligned accesses.
107 KBUILD_CFLAGS += $(call cc-option,-mstrict-align)
109 ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
110 prepare: stack_protector_prepare
111 stack_protector_prepare: prepare0
112 $(eval KBUILD_CFLAGS += -mstack-protector-guard=tls \
113 -mstack-protector-guard-reg=tp \
114 -mstack-protector-guard-offset=$(shell \
115 awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \
116 include/generated/asm-offsets.h))
119 # arch specific predefines for sparse
120 CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS)
122 # Default target when executing plain make
123 boot := arch/riscv/boot
124 ifeq ($(CONFIG_XIP_KERNEL),y)
125 KBUILD_IMAGE := $(boot)/xipImage
127 KBUILD_IMAGE := $(boot)/Image.gz
130 libs-y += arch/riscv/lib/
131 libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
133 PHONY += vdso_install
135 $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@
136 $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \
137 $(build)=arch/riscv/kernel/compat_vdso compat_$@)
139 ifeq ($(KBUILD_EXTMOD),)
140 ifeq ($(CONFIG_MMU),y)
141 prepare: vdso_prepare
142 vdso_prepare: prepare0
143 $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso include/generated/vdso-offsets.h
144 $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \
145 $(build)=arch/riscv/kernel/compat_vdso include/generated/compat_vdso-offsets.h)
150 ifneq ($(CONFIG_XIP_KERNEL),y)
151 ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_ARCH_CANAAN),yy)
152 KBUILD_IMAGE := $(boot)/loader.bin
154 ifeq ($(CONFIG_EFI_ZBOOT),)
155 KBUILD_IMAGE := $(boot)/Image.gz
157 KBUILD_IMAGE := $(boot)/vmlinuz.efi
161 BOOT_TARGETS := Image Image.gz loader loader.bin xipImage vmlinuz.efi
163 all: $(notdir $(KBUILD_IMAGE))
165 $(BOOT_TARGETS): vmlinux
166 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
167 @$(kecho) ' Kernel: $(boot)/$@ is ready'
170 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
172 install: KBUILD_IMAGE := $(boot)/Image
173 zinstall: KBUILD_IMAGE := $(boot)/Image.gz
177 PHONY += rv32_randconfig
179 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/riscv/configs/32-bit.config \
180 -f $(srctree)/Makefile randconfig
182 PHONY += rv64_randconfig
184 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/riscv/configs/64-bit.config \
185 -f $(srctree)/Makefile randconfig
187 PHONY += rv32_defconfig
189 $(Q)$(MAKE) -f $(srctree)/Makefile defconfig 32-bit.config
191 PHONY += rv32_nommu_virt_defconfig
192 rv32_nommu_virt_defconfig:
193 $(Q)$(MAKE) -f $(srctree)/Makefile nommu_virt_defconfig 32-bit.config