cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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xor.h (1930B)

      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
     16extern struct xor_block_template const xor_block_inner_neon;
     17
     18static void
     19xor_neon_2(unsigned long bytes, unsigned long * __restrict p1,
     20	   const unsigned long * __restrict p2)
     21{
     22	kernel_neon_begin();
     23	xor_block_inner_neon.do_2(bytes, p1, p2);
     24	kernel_neon_end();
     25}
     26
     27static void
     28xor_neon_3(unsigned long bytes, unsigned long * __restrict p1,
     29	   const unsigned long * __restrict p2,
     30	   const unsigned long * __restrict p3)
     31{
     32	kernel_neon_begin();
     33	xor_block_inner_neon.do_3(bytes, p1, p2, p3);
     34	kernel_neon_end();
     35}
     36
     37static void
     38xor_neon_4(unsigned long bytes, unsigned long * __restrict p1,
     39	   const unsigned long * __restrict p2,
     40	   const unsigned long * __restrict p3,
     41	   const unsigned long * __restrict p4)
     42{
     43	kernel_neon_begin();
     44	xor_block_inner_neon.do_4(bytes, p1, p2, p3, p4);
     45	kernel_neon_end();
     46}
     47
     48static void
     49xor_neon_5(unsigned long bytes, unsigned long * __restrict p1,
     50	   const unsigned long * __restrict p2,
     51	   const unsigned long * __restrict p3,
     52	   const unsigned long * __restrict p4,
     53	   const unsigned long * __restrict p5)
     54{
     55	kernel_neon_begin();
     56	xor_block_inner_neon.do_5(bytes, p1, p2, p3, p4, p5);
     57	kernel_neon_end();
     58}
     59
     60static struct xor_block_template xor_block_arm64 = {
     61	.name   = "arm64_neon",
     62	.do_2   = xor_neon_2,
     63	.do_3   = xor_neon_3,
     64	.do_4   = xor_neon_4,
     65	.do_5	= xor_neon_5
     66};
     67#undef XOR_TRY_TEMPLATES
     68#define XOR_TRY_TEMPLATES           \
     69	do {        \
     70		xor_speed(&xor_block_8regs);    \
     71		xor_speed(&xor_block_32regs);    \
     72		if (cpu_has_neon()) { \
     73			xor_speed(&xor_block_arm64);\
     74		} \
     75	} while (0)
     76
     77#endif /* ! CONFIG_KERNEL_MODE_NEON */