[PATCH 04/17] riscv: Add vector feature to compile

[Chris Stillson]

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

Signed-off-by: Guo Ren <guoren at linux.alibaba.com>
Co-developed-by: Greentime Hu <greentime.hu at sifive.com>
Signed-off-by: Greentime Hu <greentime.hu at sifive.com>
---
 arch/riscv/Kconfig  | 15 +++++++++++++--
 arch/riscv/Makefile |  1 +
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index ed66c31e4655..e294d85bfb7d 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -432,7 +432,17 @@ config FPU

          If you don't know what to do here, say Y.

-endmenu # "Platform type"
+config VECTOR
+       bool "VECTOR support"
+       depends on GCC_VERSION >= 120000 || CLANG_VERSION >= 130000
+       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"

@@ -556,6 +566,7 @@ config CMDLINE_EXTEND
          cases where the provided arguments are insufficient and
          you don't want to or cannot modify them.

+
 config CMDLINE_FORCE
        bool "Always use the default kernel command string"
        help
@@ -648,7 +659,7 @@ config XIP_PHYS_ADDR
          be linked for and stored to.  This address is dependent on your
          own flash usage.

-endmenu # "Boot options"
+endmenu

 config BUILTIN_DTB
        bool
diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile
index 3fa8ef336822..1ec17f3d6d09 100644
--- a/arch/riscv/Makefile
+++ b/arch/riscv/Makefile
@@ -50,6 +50,7 @@ riscv-march-$(CONFIG_ARCH_RV32I)      := rv32ima
 riscv-march-$(CONFIG_ARCH_RV64I)       := rv64ima
 riscv-march-$(CONFIG_FPU)              := $(riscv-march-y)fd
 riscv-march-$(CONFIG_RISCV_ISA_C)      := $(riscv-march-y)c
+riscv-march-$(CONFIG_VECTOR)           := $(riscv-march-y)v

 # Newer binutils versions default to ISA spec version 20191213 which moves some
 # instructions from the I extension to the Zicsr and Zifencei extensions.
--
2.25.1