[RFC PATCH V3 05/11] riscv: Add vector feature to compile

guoren
2020-03-08T09:54:00Z

This patch add a config option which could enable assembler's
vector feature.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
---
arch/riscv/Kconfig | 9 +++++++++
arch/riscv/Makefile | 1 +
2 files changed, 10 insertions(+)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 73f029eae0cc..c36589c85700 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -288,6 +288,15 @@ 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
index 6d09b53cf106..071eb1148e01 100644
--- a/arch/riscv/Makefile
+++ b/arch/riscv/Makefile
@@ -44,6 +44,7 @@ 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)
--
2.17.0