1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_X86_KASAN_H
3 #define _ASM_X86_KASAN_H
5 #include <linux/const.h>
6 #define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL)
7 #define KASAN_SHADOW_SCALE_SHIFT 3
10 * Compiler uses shadow offset assuming that addresses start
11 * from 0. Kernel addresses don't start from 0, so shadow
12 * for kernel really starts from compiler's shadow offset +
13 * 'kernel address space start' >> KASAN_SHADOW_SCALE_SHIFT
15 #define KASAN_SHADOW_START (KASAN_SHADOW_OFFSET + \
16 ((-1UL << __VIRTUAL_MASK_SHIFT) >> \
17 KASAN_SHADOW_SCALE_SHIFT))
19 * 47 bits for kernel address -> (47 - KASAN_SHADOW_SCALE_SHIFT) bits for shadow
20 * 56 bits for kernel address -> (56 - KASAN_SHADOW_SCALE_SHIFT) bits for shadow
22 #define KASAN_SHADOW_END (KASAN_SHADOW_START + \
23 (1ULL << (__VIRTUAL_MASK_SHIFT - \
24 KASAN_SHADOW_SCALE_SHIFT)))
29 void __init kasan_early_init(void);
30 void __init kasan_init(void);
32 static inline void kasan_early_init(void) { }
33 static inline void kasan_init(void) { }