1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ASM_KASAN_H 3 #define __ASM_KASAN_H 4 5 #ifdef CONFIG_KASAN 6 #define _GLOBAL_KASAN(fn) _GLOBAL(__##fn) 7 #define _GLOBAL_TOC_KASAN(fn) _GLOBAL_TOC(__##fn) 8 #define EXPORT_SYMBOL_KASAN(fn) EXPORT_SYMBOL(__##fn) 9 #else 10 #define _GLOBAL_KASAN(fn) _GLOBAL(fn) 11 #define _GLOBAL_TOC_KASAN(fn) _GLOBAL_TOC(fn) 12 #define EXPORT_SYMBOL_KASAN(fn) 13 #endif 14 15 #ifndef __ASSEMBLY__ 16 17 #include <asm/page.h> 18 #include <linux/sizes.h> 19 20 #define KASAN_SHADOW_SCALE_SHIFT 3 21 22 #if defined(CONFIG_PPC_BOOK3S_32) && defined(CONFIG_MODULES) && defined(CONFIG_STRICT_KERNEL_RWX) 23 #define KASAN_KERN_START ALIGN_DOWN(PAGE_OFFSET - SZ_256M, SZ_256M) 24 #else 25 #define KASAN_KERN_START PAGE_OFFSET 26 #endif 27 28 #define KASAN_SHADOW_START (KASAN_SHADOW_OFFSET + \ 29 (KASAN_KERN_START >> KASAN_SHADOW_SCALE_SHIFT)) 30 31 #define KASAN_SHADOW_OFFSET ASM_CONST(CONFIG_KASAN_SHADOW_OFFSET) 32 33 #define KASAN_SHADOW_END (-(-KASAN_SHADOW_START >> KASAN_SHADOW_SCALE_SHIFT)) 34 35 #ifdef CONFIG_KASAN 36 void kasan_early_init(void); 37 void kasan_mmu_init(void); 38 void kasan_init(void); 39 void kasan_late_init(void); 40 #else 41 static inline void kasan_init(void) { } 42 static inline void kasan_mmu_init(void) { } 43 static inline void kasan_late_init(void) { } 44 #endif 45 46 void kasan_update_early_region(unsigned long k_start, unsigned long k_end, pte_t pte); 47 int kasan_init_shadow_page_tables(unsigned long k_start, unsigned long k_end); 48 int kasan_init_region(void *start, size_t size); 49 50 #endif /* __ASSEMBLY */ 51 #endif 52