1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef __ASM_UM_KASAN_H 3#define __ASM_UM_KASAN_H 4 5#include <linux/init.h> 6#include <linux/const.h> 7 8#define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL) 9 10/* used in kasan_mem_to_shadow to divide by 8 */ 11#define KASAN_SHADOW_SCALE_SHIFT 3 12 13#ifdef CONFIG_X86_64 14#define KASAN_HOST_USER_SPACE_END_ADDR 0x00007fffffffffffUL 15/* KASAN_SHADOW_SIZE is the size of total address space divided by 8 */ 16#define KASAN_SHADOW_SIZE ((KASAN_HOST_USER_SPACE_END_ADDR + 1) >> \ 17 KASAN_SHADOW_SCALE_SHIFT) 18#else 19#error "KASAN_SHADOW_SIZE is not defined for this sub-architecture" 20#endif /* CONFIG_X86_64 */ 21 22#define KASAN_SHADOW_START (KASAN_SHADOW_OFFSET) 23#define KASAN_SHADOW_END (KASAN_SHADOW_START + KASAN_SHADOW_SIZE) 24 25#ifdef CONFIG_KASAN 26void kasan_init(void); 27void kasan_map_memory(void *start, unsigned long len); 28extern int kasan_um_is_ready; 29 30#ifdef CONFIG_STATIC_LINK 31#define kasan_arch_is_ready() (kasan_um_is_ready) 32#endif 33#else 34static inline void kasan_init(void) { } 35#endif /* CONFIG_KASAN */ 36 37#endif /* __ASM_UM_KASAN_H */ 38