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| author | Ard Biesheuvel <ardb@kernel.org> | 2021-12-13 17:02:52 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2021-12-14 15:14:26 +0300 |
| commit | 2c54b423cf85baed5ad9f9546f6c8ea741774a06 (patch) | |
| tree | 010e8a49aceae84010145ca1e51ed3e3d476a2c5 /arch/arm64/Makefile | |
| parent | d58071a8a76d779eedab38033ae4c821c30295a5 (diff) | |
| download | linux-2c54b423cf85baed5ad9f9546f6c8ea741774a06.tar.xz | |
arm64/xor: use EOR3 instructions when available
Use the EOR3 instruction to implement xor_blocks() if the instruction is
available, which is the case if the CPU implements the SHA-3 extension.
This is about 20% faster on Apple M1 when using the 5-way version.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20211213140252.2856053-1-ardb@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/Makefile')
| -rw-r--r-- | arch/arm64/Makefile | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile index e8cfc5868aa8..2f1de88651e6 100644 --- a/arch/arm64/Makefile +++ b/arch/arm64/Makefile @@ -58,6 +58,11 @@ stack_protector_prepare: prepare0 include/generated/asm-offsets.h)) endif +ifeq ($(CONFIG_AS_HAS_ARMV8_2), y) +# make sure to pass the newest target architecture to -march. +asm-arch := armv8.2-a +endif + # Ensure that if the compiler supports branch protection we default it # off, this will be overridden if we are using branch protection. branch-prot-flags-y += $(call cc-option,-mbranch-protection=none) |