From aad15bc85c189261b0554a7dc8e053641dd4025c Mon Sep 17 00:00:00 2001 From: Vincent Chen <vincent.chen@sifive.com> Date: Fri, 21 Feb 2020 10:47:55 +0800 Subject: [PATCH] riscv: Change code model of module to medany to improve data accessing MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit All the loaded module locates in the region [ï¼_end-2Gï¼VMALLOC_END] at runtime, so the distance from the module start to the end of the kernel image does not exceed 2GB. Hence, the code model of the kernel module can be changed to medany to improve the performance data access. Signed-off-by: Vincent Chen <vincent.chen@sifive.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com> --- arch/riscv/Makefile | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile index b9009a2fbaf5c..259cb53d7f20e 100644 --- a/arch/riscv/Makefile +++ b/arch/riscv/Makefile @@ -13,8 +13,10 @@ LDFLAGS_vmlinux := ifeq ($(CONFIG_DYNAMIC_FTRACE),y) LDFLAGS_vmlinux := --no-relax endif -KBUILD_AFLAGS_MODULE += -fPIC -KBUILD_CFLAGS_MODULE += -fPIC + +ifeq ($(CONFIG_64BIT)$(CONFIG_CMODEL_MEDLOW),yy) +KBUILD_CFLAGS_MODULE += -mcmodel=medany +endif export BITS ifeq ($(CONFIG_ARCH_RV64I),y) -- 2.30.2