riscv: Add vector feature to compile

This patch adds a new config option which could enable assembler's vector feature. Signed-off-by: Greentime Hu <greentime.hu@sifive.com> Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Reviewed-by: Greentime Hu <greentime.hu@sifive.com>
0day-ci · Nov 9, 2021 · b164ca1 · b164ca1
1 parent 4ef4ca8
commit b164ca1
Show file tree

Hide file tree

Showing 2 changed files with 10 additions and 0 deletions.
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
@@ -389,6 +389,15 @@ config FPU
 
 	  If you don't know what to do here, say Y.
 
+config VECTOR
+	bool "VECTOR support"
+	default n
+	help
+	  Say N here if you want to disable all vector related procedure
+	  in the kernel.
+
+	  If you don't know what to do here, say Y.
+
 endmenu
 
 menu "Kernel features"

diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile
@@ -57,6 +57,7 @@ riscv-march-aflags-$(CONFIG_ARCH_RV32I)		:= rv32ima
 riscv-march-aflags-$(CONFIG_ARCH_RV64I)		:= rv64ima
 riscv-march-aflags-$(CONFIG_FPU)		:= $(riscv-march-aflags-y)fd
 riscv-march-aflags-$(CONFIG_RISCV_ISA_C)	:= $(riscv-march-aflags-y)c
+riscv-march-aflags-$(CONFIG_VECTOR)		:= $(riscv-march-aflags-y)v
 
 KBUILD_CFLAGS += -march=$(riscv-march-cflags-y)
 KBUILD_AFLAGS += -march=$(riscv-march-aflags-y)