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cc9f8349cb
This is a NEON acceleration method that can improve performance by approximately 20%. I got the following data from the centos 7.5 on Huawei's HISI1616 chip: [ 93.837726] xor: measuring software checksum speed [ 93.874039] 8regs : 7123.200 MB/sec [ 93.914038] 32regs : 7180.300 MB/sec [ 93.954043] arm64_neon: 9856.000 MB/sec [ 93.954047] xor: using function: arm64_neon (9856.000 MB/sec) I believe this code can bring some optimization for all arm64 platform. thanks for Ard Biesheuvel's suggestions. Signed-off-by: Jackie Liu <liuyun01@kylinos.cn> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
/*
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* arch/arm64/include/asm/xor.h
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*
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* Authors: Jackie Liu <liuyun01@kylinos.cn>
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* Copyright (C) 2018,Tianjin KYLIN Information Technology Co., Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/hardirq.h>
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#include <asm-generic/xor.h>
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#include <asm/hwcap.h>
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#include <asm/neon.h>
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#ifdef CONFIG_KERNEL_MODE_NEON
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extern struct xor_block_template const xor_block_inner_neon;
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static void
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xor_neon_2(unsigned long bytes, unsigned long *p1, unsigned long *p2)
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{
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kernel_neon_begin();
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xor_block_inner_neon.do_2(bytes, p1, p2);
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kernel_neon_end();
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}
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static void
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xor_neon_3(unsigned long bytes, unsigned long *p1, unsigned long *p2,
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unsigned long *p3)
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{
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kernel_neon_begin();
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xor_block_inner_neon.do_3(bytes, p1, p2, p3);
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kernel_neon_end();
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}
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static void
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xor_neon_4(unsigned long bytes, unsigned long *p1, unsigned long *p2,
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unsigned long *p3, unsigned long *p4)
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{
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kernel_neon_begin();
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xor_block_inner_neon.do_4(bytes, p1, p2, p3, p4);
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kernel_neon_end();
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}
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static void
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xor_neon_5(unsigned long bytes, unsigned long *p1, unsigned long *p2,
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unsigned long *p3, unsigned long *p4, unsigned long *p5)
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{
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kernel_neon_begin();
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xor_block_inner_neon.do_5(bytes, p1, p2, p3, p4, p5);
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kernel_neon_end();
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}
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static struct xor_block_template xor_block_arm64 = {
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.name = "arm64_neon",
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.do_2 = xor_neon_2,
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.do_3 = xor_neon_3,
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.do_4 = xor_neon_4,
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.do_5 = xor_neon_5
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};
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#undef XOR_TRY_TEMPLATES
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#define XOR_TRY_TEMPLATES \
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do { \
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xor_speed(&xor_block_8regs); \
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xor_speed(&xor_block_32regs); \
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if (cpu_has_neon()) { \
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xor_speed(&xor_block_arm64);\
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} \
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} while (0)
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#endif /* ! CONFIG_KERNEL_MODE_NEON */
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