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riscv: implement Zicbom-based CMO instructions + the t-head variant
[linux-2.6-block.git]
/
arch
/
riscv
/
Makefile
diff --git
a/arch/riscv/Makefile
b/arch/riscv/Makefile
index 81029d40a6727a887d4cb142d0ad5e8659b82b98..42d7ff8730aa649e47e43b3a9b8e989ce8e68103 100644
(file)
--- a/
arch/riscv/Makefile
+++ b/
arch/riscv/Makefile
@@
-56,6
+56,10
@@
riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c
toolchain-need-zicsr-zifencei := $(call cc-option-yn, -march=$(riscv-march-y)_zicsr_zifencei)
riscv-march-$(toolchain-need-zicsr-zifencei) := $(riscv-march-y)_zicsr_zifencei
toolchain-need-zicsr-zifencei := $(call cc-option-yn, -march=$(riscv-march-y)_zicsr_zifencei)
riscv-march-$(toolchain-need-zicsr-zifencei) := $(riscv-march-y)_zicsr_zifencei
+# Check if the toolchain supports Zicbom extension
+toolchain-supports-zicbom := $(call cc-option-yn, -march=$(riscv-march-y)_zicbom)
+riscv-march-$(toolchain-supports-zicbom) := $(riscv-march-y)_zicbom
+
KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y))
KBUILD_AFLAGS += -march=$(riscv-march-y)
KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y))
KBUILD_AFLAGS += -march=$(riscv-march-y)