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| author |   Zhenyu Ye <yezhenyu2@huawei.com> | 2020-07-15 15:19:44 +0800 |
|---|---|---|
| committer |   Catalin Marinas <catalin.marinas@arm.com> | 2020-07-15 16:01:01 +0100 |
| commit | 7c78f67e9bd97478d56157c2ad53823668b5b822 (patch) | |
| tree | e846da84e4dbda4de151f72a9a3fc1f6c3723259 /arch/arm64/Makefile | |
| parent | arm64: tlb: Detect the ARMv8.4 TLBI RANGE feature (diff) | |
| download | linux-dev-7c78f67e9bd97478d56157c2ad53823668b5b822.tar.xz linux-dev-7c78f67e9bd97478d56157c2ad53823668b5b822.zip | |
arm64: enable tlbi range instructions
TLBI RANGE feature instoduces new assembly instructions and only
support by binutils >= 2.30. Add necessary Kconfig logic to allow
this to be enabled and pass '-march=armv8.4-a' to KBUILD_CFLAGS.
Signed-off-by: Zhenyu Ye <yezhenyu2@huawei.com>
Link: https://lore.kernel.org/r/20200715071945.897-3-yezhenyu2@huawei.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/Makefile')
| -rw-r--r-- | arch/arm64/Makefile | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile index a0d94d063fa8..4e823b97c92e 100644 --- a/arch/arm64/Makefile +++ b/arch/arm64/Makefile @@ -82,11 +82,18 @@ endif # compiler to generate them and consequently to break the single image contract # we pass it only to the assembler. This option is utilized only in case of non # integrated assemblers. +ifneq ($(CONFIG_AS_HAS_ARMV8_4), y) branch-prot-flags-$(CONFIG_AS_HAS_PAC) += -Wa,-march=armv8.3-a endif +endif KBUILD_CFLAGS += $(branch-prot-flags-y) +ifeq ($(CONFIG_AS_HAS_ARMV8_4), y) +# make sure to pass the newest target architecture to -march. +KBUILD_CFLAGS += -Wa,-march=armv8.4-a +endif + ifeq ($(CONFIG_SHADOW_CALL_STACK), y) KBUILD_CFLAGS += -ffixed-x18 endif |