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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 | |
| parent | b620ba54547cd0f98e35c1be102eec2cc25fda5d (diff) | |
| download | linux-7c78f67e9bd97478d56157c2ad53823668b5b822.tar.bz2 | |
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')
| -rw-r--r-- | arch/arm64/Kconfig | 14 | ||||
| -rw-r--r-- | arch/arm64/Makefile | 7 |
2 files changed, 21 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 66dc41fd49f2..0f39468dbc60 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -1596,6 +1596,20 @@ config ARM64_AMU_EXTN correctly reflect reality. Most commonly, the value read will be 0, indicating that the counter is not enabled. +config AS_HAS_ARMV8_4 + def_bool $(cc-option,-Wa$(comma)-march=armv8.4-a) + +config ARM64_TLB_RANGE + bool "Enable support for tlbi range feature" + default y + depends on AS_HAS_ARMV8_4 + help + ARMv8.4-TLBI provides TLBI invalidation instruction that apply to a + range of input addresses. + + The feature introduces new assembly instructions, and they were + support when binutils >= 2.30. + endmenu menu "ARMv8.5 architectural features" 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 |