diff options
| author | Ard Biesheuvel <ardb@kernel.org> | 2021-12-13 15:02:52 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2021-12-14 12:14:26 +0000 |
| commit | 2c54b423cf85baed5ad9f9546f6c8ea741774a06 (patch) | |
| tree | 010e8a49aceae84010145ca1e51ed3e3d476a2c5 /arch/arm64/Kconfig | |
| parent | d58071a8a76d779eedab38033ae4c821c30295a5 (diff) | |
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/Kconfig')
| -rw-r--r-- | arch/arm64/Kconfig | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index c4207cf9bb17..63d41ba4e716 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -1545,6 +1545,12 @@ endmenu menu "ARMv8.2 architectural features" +config AS_HAS_ARMV8_2 + def_bool $(cc-option,-Wa$(comma)-march=armv8.2-a) + +config AS_HAS_SHA3 + def_bool $(as-instr,.arch armv8.2-a+sha3) + config ARM64_PMEM bool "Enable support for persistent memory" select ARCH_HAS_PMEM_API |