1 # This file is included by the global makefile
2 # architecture-specific flags and dependencies
3 #
4 # This file is subject to the terms and condit
5 # License. See the file "COPYING" in the main
6 # for more details.
7 #
8
9 LDFLAGS_vmlinux := -z norelro
10 ifeq ($(CONFIG_RELOCATABLE),y)
11 LDFLAGS_vmlinux += -shared -Bsymbolic
12 KBUILD_CFLAGS += -fPIE
13 endif
14 ifeq ($(CONFIG_DYNAMIC_FTRACE),y)
15 LDFLAGS_vmlinux += --no-relax
16 KBUILD_CPPFLAGS += -DCC_USING_PATCHABL
17 ifeq ($(CONFIG_RISCV_ISA_C),y)
18 CC_FLAGS_FTRACE := -fpatchable-functio
19 else
20 CC_FLAGS_FTRACE := -fpatchable-functio
21 endif
22 endif
23
24 ifeq ($(CONFIG_CMODEL_MEDLOW),y)
25 KBUILD_CFLAGS_MODULE += -mcmodel=medany
26 endif
27
28 export BITS
29 ifeq ($(CONFIG_ARCH_RV64I),y)
30 BITS := 64
31 UTS_MACHINE := riscv64
32
33 KBUILD_CFLAGS += -mabi=lp64
34 KBUILD_AFLAGS += -mabi=lp64
35
36 KBUILD_LDFLAGS += -melf64lriscv
37
38 KBUILD_RUSTFLAGS += -Ctarget-cpu=gener
39 -Cno-redzone
40 else
41 BITS := 32
42 UTS_MACHINE := riscv32
43
44 KBUILD_CFLAGS += -mabi=ilp32
45 KBUILD_AFLAGS += -mabi=ilp32
46 KBUILD_LDFLAGS += -melf32lriscv
47 endif
48
49 ifndef CONFIG_RISCV_USE_LINKER_RELAXATION
50 KBUILD_CFLAGS += -mno-relax
51 KBUILD_AFLAGS += -mno-relax
52 ifndef CONFIG_AS_IS_LLVM
53 KBUILD_CFLAGS += -Wa,-mno-relax
54 KBUILD_AFLAGS += -Wa,-mno-relax
55 endif
56 # LLVM has an issue with target-features and L
57 # Ensure it is aware of linker relaxation with
58 # be incorrect: https://github.com/llvm/llvm-p
59 else ifeq ($(CONFIG_LTO_CLANG),y)
60 KBUILD_LDFLAGS += -mllvm -mattr=+c -ml
61 endif
62
63 ifeq ($(CONFIG_SHADOW_CALL_STACK),y)
64 KBUILD_LDFLAGS += --no-relax-gp
65 endif
66
67 # ISA string setting
68 riscv-march-$(CONFIG_ARCH_RV32I) := rv3
69 riscv-march-$(CONFIG_ARCH_RV64I) := rv6
70 riscv-march-$(CONFIG_FPU) := $(r
71 riscv-march-$(CONFIG_RISCV_ISA_C) := $(r
72 riscv-march-$(CONFIG_RISCV_ISA_V) := $(r
73
74 ifneq ($(CONFIG_RISCV_ISA_C),y)
75 KBUILD_RUSTFLAGS += -Ctarget-feature=-
76 endif
77
78 ifdef CONFIG_TOOLCHAIN_NEEDS_OLD_ISA_SPEC
79 KBUILD_CFLAGS += -Wa,-misa-spec=2.2
80 KBUILD_AFLAGS += -Wa,-misa-spec=2.2
81 else
82 riscv-march-$(CONFIG_TOOLCHAIN_NEEDS_EXPLICIT_
83 endif
84
85 # Remove F,D,V from isa string for all. Keep e
86 # matching non-v and non-multi-letter extensio
87 KBUILD_CFLAGS += -march=$(shell echo $(riscv-m
88
89 KBUILD_AFLAGS += -march=$(riscv-march-y)
90
91 # For C code built with floating-point support
92 CC_FLAGS_FPU := -march=$(shell echo $(riscv-m
93
94 KBUILD_CFLAGS += -mno-save-restore
95 KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG
96
97 ifeq ($(CONFIG_CMODEL_MEDLOW),y)
98 KBUILD_CFLAGS += -mcmodel=medlow
99 endif
100 ifeq ($(CONFIG_CMODEL_MEDANY),y)
101 KBUILD_CFLAGS += -mcmodel=medany
102 endif
103
104 # Avoid generating .eh_frame sections.
105 KBUILD_CFLAGS += -fno-asynchronous-unwind-tabl
106
107 # The RISC-V attributes frequently cause compa
108 # information, so just turn them off.
109 KBUILD_CFLAGS += $(call cc-option,-mno-riscv-a
110 KBUILD_AFLAGS += $(call cc-option,-mno-riscv-a
111 KBUILD_CFLAGS += $(call as-option,-Wa$(comma)-
112 KBUILD_AFLAGS += $(call as-option,-Wa$(comma)-
113
114 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-
115 KBUILD_AFLAGS_MODULE += $(call as-option,-Wa$(
116
117 # GCC versions that support the "-mstrict-alig
118 # unaligned accesses. While unaligned accesse
119 # RISC-V ISA, they're emulated by machine mode
120 # architectures. It's faster to have GCC emit
121 ifneq ($(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCES
122 KBUILD_CFLAGS += $(call cc-option,-mstrict-ali
123 endif
124
125 ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
126 prepare: stack_protector_prepare
127 stack_protector_prepare: prepare0
128 $(eval KBUILD_CFLAGS += -mstack-protec
129 -mstack-protec
130 -mstack-protec
131 awk '{if ($$2 == "TSK_
132 includ
133 endif
134
135 # arch specific predefines for sparse
136 CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS)
137
138 # Default target when executing plain make
139 boot := arch/riscv/boot
140 ifeq ($(CONFIG_XIP_KERNEL),y)
141 KBUILD_IMAGE := $(boot)/xipImage
142 else
143 ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_CANAA
144 KBUILD_IMAGE := $(boot)/loader.bin
145 else
146 ifeq ($(CONFIG_EFI_ZBOOT),)
147 KBUILD_IMAGE := $(boot)/Image.gz
148 else
149 KBUILD_IMAGE := $(boot)/vmlinuz.efi
150 endif
151 endif
152 endif
153
154 boot := arc
155 boot-image-y := Ima
156 boot-image-$(CONFIG_KERNEL_BZIP2) := Ima
157 boot-image-$(CONFIG_KERNEL_GZIP) := Ima
158 boot-image-$(CONFIG_KERNEL_LZ4) := Ima
159 boot-image-$(CONFIG_KERNEL_LZMA) := Ima
160 boot-image-$(CONFIG_KERNEL_LZO) := Ima
161 boot-image-$(CONFIG_KERNEL_ZSTD) := Ima
162 boot-image-$(CONFIG_KERNEL_XZ) := Ima
163 ifdef CONFIG_RISCV_M_MODE
164 boot-image-$(CONFIG_ARCH_CANAAN) := loa
165 endif
166 boot-image-$(CONFIG_EFI_ZBOOT) := vml
167 boot-image-$(CONFIG_XIP_KERNEL) := xip
168 KBUILD_IMAGE := $(b
169
170 libs-y += arch/riscv/lib/
171 libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/
172
173 ifeq ($(KBUILD_EXTMOD),)
174 ifeq ($(CONFIG_MMU),y)
175 prepare: vdso_prepare
176 vdso_prepare: prepare0
177 $(Q)$(MAKE) $(build)=arch/riscv/kernel
178 $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \
179 $(build)=arch/riscv/kernel/com
180
181 endif
182 endif
183
184 vdso-install-y += arch/riscv/
185 vdso-install-$(CONFIG_COMPAT) += arch/riscv/
186
187 BOOT_TARGETS := Image Image.gz Image.bz2 Image
188
189 all: $(notdir $(KBUILD_IMAGE))
190
191 loader.bin: loader
192 Image.gz Image.bz2 Image.lz4 Image.lzma Image.
193
194 $(BOOT_TARGETS): vmlinux
195 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$
196 @$(kecho) ' Kernel: $(boot)/$@ is rea
197
198 # the install target always installs KBUILD_IM
199 # but keep the zinstall target for compatibili
200 install zinstall:
201 $(call cmd,install)
202
203 PHONY += rv32_randconfig
204 rv32_randconfig:
205 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctre
206 -f $(srctree)/Makefile randcon
207
208 PHONY += rv64_randconfig
209 rv64_randconfig:
210 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctre
211 -f $(srctree)/Makefile randcon
212
213 PHONY += rv32_defconfig
214 rv32_defconfig:
215 $(Q)$(MAKE) -f $(srctree)/Makefile def
216
217 PHONY += rv32_nommu_virt_defconfig
218 rv32_nommu_virt_defconfig:
219 $(Q)$(MAKE) -f $(srctree)/Makefile nom
220
221 define archhelp
222 echo ' Image - Uncompressed
223 echo ' Image.gz - Compressed kernel im
224 echo ' Image.bz2 - Compressed kernel im
225 echo ' Image.lz4 - Compressed kernel im
226 echo ' Image.lzma - Compressed kernel im
227 echo ' Image.lzo - Compressed kernel im
228 echo ' Image.zst - Compressed kernel im
229 echo ' Image.xz - Compressed kernel im
230 echo ' vmlinuz.efi - Compressed EFI kerne
231 echo ' Default when CONFIG_
232 echo ' xipImage - Execute-in-place ker
233 echo ' Default when CONFIG_
234 echo ' install - Install kernel using
235 echo ' (distribution) /sbin
236 echo ' $$(INSTALL_PATH)'
237 endef
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