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| author | Vincent Chen <vincent.chen@sifive.com> | 2020-02-21 03:47:55 +0100 |
|---|---|---|
| committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2020-03-03 19:27:46 +0100 |
| commit | aad15bc85c189261b0554a7dc8e053641dd4025c (patch) | |
| tree | 5514fdeb5db500ae542b733ae9aa11ec62fe15f4 | |
| parent | riscv: avoid the PIC offset of static percpu data in module beyond 2G limits (diff) | |
| download | linux-aad15bc85c189261b0554a7dc8e053641dd4025c.tar.xz linux-aad15bc85c189261b0554a7dc8e053641dd4025c.zip | |
riscv: Change code model of module to medany to improve data accessing
All the loaded module locates in the region [＆_end-2G，VMALLOC_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>
| -rw-r--r-- | arch/riscv/Makefile | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile index b9009a2fbaf5..259cb53d7f20 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) |