1#ifndef _ASM_X86_KASAN_H
 2#define _ASM_X86_KASAN_H
 3
 4#include <linux/const.h>
 5#define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL)
 
 6
 7/*
 8 * Compiler uses shadow offset assuming that addresses start
 9 * from 0. Kernel addresses don't start from 0, so shadow
10 * for kernel really starts from compiler's shadow offset +
11 * 'kernel address space start' >> KASAN_SHADOW_SCALE_SHIFT
12 */
13#define KASAN_SHADOW_START      (KASAN_SHADOW_OFFSET + \
14					(0xffff800000000000ULL >> 3))
15/* 47 bits for kernel address -> (47 - 3) bits for shadow */
16#define KASAN_SHADOW_END        (KASAN_SHADOW_START + (1ULL << (47 - 3)))
 
 
 
 
 
 
17
18#ifndef __ASSEMBLY__
19
20#ifdef CONFIG_KASAN
21void __init kasan_early_init(void);
22void __init kasan_init(void);
 
23#else
24static inline void kasan_early_init(void) { }
25static inline void kasan_init(void) { }
 
 
26#endif
27
28#endif
29
30#endif

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _ASM_X86_KASAN_H
 3#define _ASM_X86_KASAN_H
 4
 5#include <linux/const.h>
 6#define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL)
 7#define KASAN_SHADOW_SCALE_SHIFT 3
 8
 9/*
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
14 */
15#define KASAN_SHADOW_START      (KASAN_SHADOW_OFFSET + \
16					((-1UL << __VIRTUAL_MASK_SHIFT) >> \
17						KASAN_SHADOW_SCALE_SHIFT))
18/*
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
21 */
22#define KASAN_SHADOW_END        (KASAN_SHADOW_START + \
23					(1ULL << (__VIRTUAL_MASK_SHIFT - \
24						  KASAN_SHADOW_SCALE_SHIFT)))
25
26#ifndef __ASSEMBLY__
27
28#ifdef CONFIG_KASAN
29void __init kasan_early_init(void);
30void __init kasan_init(void);
31void __init kasan_populate_shadow_for_vaddr(void *va, size_t size, int nid);
32#else
33static inline void kasan_early_init(void) { }
34static inline void kasan_init(void) { }
35static inline void kasan_populate_shadow_for_vaddr(void *va, size_t size,
36						   int nid) { }
37#endif
38
39#endif
40
41#endif