1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ASM_KASAN_H 3 #define __ASM_KASAN_H 4 5 #ifdef CONFIG_KASAN 6 7 #define KASAN_SHADOW_SCALE_SHIFT 3 8 #ifdef CONFIG_KASAN_S390_4_LEVEL_PAGING 9 #define KASAN_SHADOW_SIZE \ 10 (_AC(1, UL) << (_REGION1_SHIFT - KASAN_SHADOW_SCALE_SHIFT)) 11 #else 12 #define KASAN_SHADOW_SIZE \ 13 (_AC(1, UL) << (_REGION2_SHIFT - KASAN_SHADOW_SCALE_SHIFT)) 14 #endif 15 #define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL) 16 #define KASAN_SHADOW_START KASAN_SHADOW_OFFSET 17 #define KASAN_SHADOW_END (KASAN_SHADOW_START + KASAN_SHADOW_SIZE) 18 19 extern void kasan_early_init(void); 20 extern void kasan_copy_shadow(pgd_t *dst); 21 extern void kasan_free_early_identity(void); 22 #else 23 static inline void kasan_early_init(void) { } 24 static inline void kasan_copy_shadow(pgd_t *dst) { } 25 static inline void kasan_free_early_identity(void) { } 26 #endif 27 28 #endif 29