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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kasan.h (1589B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/* Copyright (C) 2019 Andes Technology Corporation */
      3
      4#ifndef __ASM_KASAN_H
      5#define __ASM_KASAN_H
      6
      7#ifndef __ASSEMBLY__
      8
      9#ifdef CONFIG_KASAN
     10
     11/*
     12 * The following comment was copied from arm64:
     13 * KASAN_SHADOW_START: beginning of the kernel virtual addresses.
     14 * KASAN_SHADOW_END: KASAN_SHADOW_START + 1/N of kernel virtual addresses,
     15 * where N = (1 << KASAN_SHADOW_SCALE_SHIFT).
     16 *
     17 * KASAN_SHADOW_OFFSET:
     18 * This value is used to map an address to the corresponding shadow
     19 * address by the following formula:
     20 *     shadow_addr = (address >> KASAN_SHADOW_SCALE_SHIFT) + KASAN_SHADOW_OFFSET
     21 *
     22 * (1 << (64 - KASAN_SHADOW_SCALE_SHIFT)) shadow addresses that lie in range
     23 * [KASAN_SHADOW_OFFSET, KASAN_SHADOW_END) cover all 64-bits of virtual
     24 * addresses. So KASAN_SHADOW_OFFSET should satisfy the following equation:
     25 *      KASAN_SHADOW_OFFSET = KASAN_SHADOW_END -
     26 *                              (1ULL << (64 - KASAN_SHADOW_SCALE_SHIFT))
     27 */
     28#define KASAN_SHADOW_SCALE_SHIFT	3
     29
     30#define KASAN_SHADOW_SIZE	(UL(1) << ((VA_BITS - 1) - KASAN_SHADOW_SCALE_SHIFT))
     31/*
     32 * Depending on the size of the virtual address space, the region may not be
     33 * aligned on PGDIR_SIZE, so force its alignment to ease its population.
     34 */
     35#define KASAN_SHADOW_START	((KASAN_SHADOW_END - KASAN_SHADOW_SIZE) & PGDIR_MASK)
     36#define KASAN_SHADOW_END	MODULES_LOWEST_VADDR
     37#define KASAN_SHADOW_OFFSET	_AC(CONFIG_KASAN_SHADOW_OFFSET, UL)
     38
     39void kasan_init(void);
     40asmlinkage void kasan_early_init(void);
     41void kasan_swapper_init(void);
     42
     43#endif
     44#endif
     45#endif /* __ASM_KASAN_H */