arch/arm64/include/asm/xor.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * arch/arm64/include/asm/xor.h
   4  *
   5  * Authors: Jackie Liu <liuyun01@kylinos.cn>
   6  * Copyright (C) 2018,Tianjin KYLIN Information Technology Co., Ltd.
   7  */
   8
   9 #include <linux/hardirq.h>
  10 #include <asm-generic/xor.h>
  11 #include <asm/hwcap.h>
  12 #include <asm/neon.h>
  13
  14 #ifdef CONFIG_KERNEL_MODE_NEON
  15
  16 extern struct xor_block_template const xor_block_inner_neon;
  17
  18 static void
  19 xor_neon_2(unsigned long bytes, unsigned long *p1, unsigned long *p2)
  20 {
  21         kernel_neon_begin();
  22         xor_block_inner_neon.do_2(bytes, p1, p2);
  23         kernel_neon_end();
  24 }
  25
  26 static void
  27 xor_neon_3(unsigned long bytes, unsigned long *p1, unsigned long *p2,
  28                 unsigned long *p3)
  29 {
  30         kernel_neon_begin();
  31         xor_block_inner_neon.do_3(bytes, p1, p2, p3);
  32         kernel_neon_end();
  33 }
  34
  35 static void
  36 xor_neon_4(unsigned long bytes, unsigned long *p1, unsigned long *p2,
  37                 unsigned long *p3, unsigned long *p4)
  38 {
  39         kernel_neon_begin();
  40         xor_block_inner_neon.do_4(bytes, p1, p2, p3, p4);
  41         kernel_neon_end();
  42 }
  43
  44 static void
  45 xor_neon_5(unsigned long bytes, unsigned long *p1, unsigned long *p2,
  46                 unsigned long *p3, unsigned long *p4, unsigned long *p5)
  47 {
  48         kernel_neon_begin();
  49         xor_block_inner_neon.do_5(bytes, p1, p2, p3, p4, p5);
  50         kernel_neon_end();
  51 }
  52
  53 static struct xor_block_template xor_block_arm64 = {
  54         .name   = "arm64_neon",
  55         .do_2   = xor_neon_2,
  56         .do_3   = xor_neon_3,
  57         .do_4   = xor_neon_4,
  58         .do_5   = xor_neon_5
  59 };
  60 #undef XOR_TRY_TEMPLATES
  61 #define XOR_TRY_TEMPLATES           \
  62         do {        \
  63                 xor_speed(&xor_block_8regs);    \
  64                 xor_speed(&xor_block_32regs);    \
  65                 if (cpu_has_neon()) { \
  66                         xor_speed(&xor_block_arm64);\
  67                 } \
  68         } while (0)
  69
  70 #endif /* ! CONFIG_KERNEL_MODE_NEON */