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 36void kasan_early_init(void); 37void kasan_mmu_init(void); 38void kasan_init(void); 39void kasan_late_init(void); 40#else 41static inline void kasan_init(void) { } 42static inline void kasan_mmu_init(void) { } 43static inline void kasan_late_init(void) { } 44#endif 45 46void kasan_update_early_region(unsigned long k_start, unsigned long k_end, pte_t pte); 47int kasan_init_shadow_page_tables(unsigned long k_start, unsigned long k_end); 48int kasan_init_region(void *start, size_t size); 49 50#endif /* __ASSEMBLY */ 51#endif 52