1#ifndef __ASM_KASAN_H
2#define __ASM_KASAN_H
3
4#ifndef __ASSEMBLY__
5
6#ifdef CONFIG_KASAN
7
8#include <linux/linkage.h>
9#include <asm/memory.h>
10
11/*
12 * KASAN_SHADOW_START: beginning of the kernel virtual addresses.
13 * KASAN_SHADOW_END: KASAN_SHADOW_START + 1/8 of kernel virtual addresses.
14 */
15#define KASAN_SHADOW_START      (VA_START)
16#define KASAN_SHADOW_END        (KASAN_SHADOW_START + (1UL << (VA_BITS - 3)))
17
18/*
19 * This value is used to map an address to the corresponding shadow
20 * address by the following formula:
21 *     shadow_addr = (address >> 3) + KASAN_SHADOW_OFFSET;
22 *
23 * (1 << 61) shadow addresses - [KASAN_SHADOW_OFFSET,KASAN_SHADOW_END]
24 * cover all 64-bits of virtual addresses. So KASAN_SHADOW_OFFSET
25 * should satisfy the following equation:
26 *      KASAN_SHADOW_OFFSET = KASAN_SHADOW_END - (1ULL << 61)
27 */
28#define KASAN_SHADOW_OFFSET     (KASAN_SHADOW_END - (1ULL << (64 - 3)))
29
30void kasan_init(void);
31asmlinkage void kasan_early_init(void);
32
33#else
34static inline void kasan_init(void) { }
35#endif
36
37#endif
38#endif
39