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 (1568B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef __ASM_KASAN_H
      3#define __ASM_KASAN_H
      4
      5#ifndef __ASSEMBLY__
      6
      7#include <linux/linkage.h>
      8#include <asm/memory.h>
      9#include <asm/mte-kasan.h>
     10#include <asm/pgtable-types.h>
     11
     12#define arch_kasan_set_tag(addr, tag)	__tag_set(addr, tag)
     13#define arch_kasan_reset_tag(addr)	__tag_reset(addr)
     14#define arch_kasan_get_tag(addr)	__tag_get(addr)
     15
     16#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)
     17
     18void kasan_init(void);
     19
     20/*
     21 * KASAN_SHADOW_START: beginning of the kernel virtual addresses.
     22 * KASAN_SHADOW_END: KASAN_SHADOW_START + 1/N of kernel virtual addresses,
     23 * where N = (1 << KASAN_SHADOW_SCALE_SHIFT).
     24 *
     25 * KASAN_SHADOW_OFFSET:
     26 * This value is used to map an address to the corresponding shadow
     27 * address by the following formula:
     28 *     shadow_addr = (address >> KASAN_SHADOW_SCALE_SHIFT) + KASAN_SHADOW_OFFSET
     29 *
     30 * (1 << (64 - KASAN_SHADOW_SCALE_SHIFT)) shadow addresses that lie in range
     31 * [KASAN_SHADOW_OFFSET, KASAN_SHADOW_END) cover all 64-bits of virtual
     32 * addresses. So KASAN_SHADOW_OFFSET should satisfy the following equation:
     33 *      KASAN_SHADOW_OFFSET = KASAN_SHADOW_END -
     34 *				(1ULL << (64 - KASAN_SHADOW_SCALE_SHIFT))
     35 */
     36#define _KASAN_SHADOW_START(va)	(KASAN_SHADOW_END - (1UL << ((va) - KASAN_SHADOW_SCALE_SHIFT)))
     37#define KASAN_SHADOW_START      _KASAN_SHADOW_START(vabits_actual)
     38
     39void kasan_copy_shadow(pgd_t *pgdir);
     40asmlinkage void kasan_early_init(void);
     41
     42#else
     43static inline void kasan_init(void) { }
     44static inline void kasan_copy_shadow(pgd_t *pgdir) { }
     45#endif
     46
     47#endif
     48#endif