1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef __ASM_KASAN_H 3*4882a593Smuzhiyun #define __ASM_KASAN_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #ifdef CONFIG_KASAN 6*4882a593Smuzhiyun #define _GLOBAL_KASAN(fn) _GLOBAL(__##fn) 7*4882a593Smuzhiyun #define _GLOBAL_TOC_KASAN(fn) _GLOBAL_TOC(__##fn) 8*4882a593Smuzhiyun #define EXPORT_SYMBOL_KASAN(fn) EXPORT_SYMBOL(__##fn) 9*4882a593Smuzhiyun #else 10*4882a593Smuzhiyun #define _GLOBAL_KASAN(fn) _GLOBAL(fn) 11*4882a593Smuzhiyun #define _GLOBAL_TOC_KASAN(fn) _GLOBAL_TOC(fn) 12*4882a593Smuzhiyun #define EXPORT_SYMBOL_KASAN(fn) 13*4882a593Smuzhiyun #endif 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun #ifndef __ASSEMBLY__ 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun #include <asm/page.h> 18*4882a593Smuzhiyun #include <linux/sizes.h> 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun #define KASAN_SHADOW_SCALE_SHIFT 3 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun #if defined(CONFIG_PPC_BOOK3S_32) && defined(CONFIG_MODULES) && defined(CONFIG_STRICT_KERNEL_RWX) 23*4882a593Smuzhiyun #define KASAN_KERN_START ALIGN_DOWN(PAGE_OFFSET - SZ_256M, SZ_256M) 24*4882a593Smuzhiyun #else 25*4882a593Smuzhiyun #define KASAN_KERN_START PAGE_OFFSET 26*4882a593Smuzhiyun #endif 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun #define KASAN_SHADOW_START (KASAN_SHADOW_OFFSET + \ 29*4882a593Smuzhiyun (KASAN_KERN_START >> KASAN_SHADOW_SCALE_SHIFT)) 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun #define KASAN_SHADOW_OFFSET ASM_CONST(CONFIG_KASAN_SHADOW_OFFSET) 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun #define KASAN_SHADOW_END (-(-KASAN_SHADOW_START >> KASAN_SHADOW_SCALE_SHIFT)) 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun #ifdef CONFIG_KASAN 36*4882a593Smuzhiyun void kasan_early_init(void); 37*4882a593Smuzhiyun void kasan_mmu_init(void); 38*4882a593Smuzhiyun void kasan_init(void); 39*4882a593Smuzhiyun void kasan_late_init(void); 40*4882a593Smuzhiyun #else kasan_init(void)41*4882a593Smuzhiyunstatic inline void kasan_init(void) { } kasan_mmu_init(void)42*4882a593Smuzhiyunstatic inline void kasan_mmu_init(void) { } kasan_late_init(void)43*4882a593Smuzhiyunstatic inline void kasan_late_init(void) { } 44*4882a593Smuzhiyun #endif 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun void kasan_update_early_region(unsigned long k_start, unsigned long k_end, pte_t pte); 47*4882a593Smuzhiyun int kasan_init_shadow_page_tables(unsigned long k_start, unsigned long k_end); 48*4882a593Smuzhiyun int kasan_init_region(void *start, size_t size); 49*4882a593Smuzhiyun 50*4882a593Smuzhiyun #endif /* __ASSEMBLY */ 51*4882a593Smuzhiyun #endif 52