| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef __ASM_KASAN_H |
| #define __ASM_KASAN_H |
| |
| #ifndef __ASSEMBLY__ |
| |
| #include <linux/linkage.h> |
| #include <asm/memory.h> |
| #include <asm/pgtable-types.h> |
| |
| #define arch_kasan_set_tag(addr, tag) __tag_set(addr, tag) |
| #define arch_kasan_reset_tag(addr) __tag_reset(addr) |
| #define arch_kasan_get_tag(addr) __tag_get(addr) |
| |
| #ifdef CONFIG_KASAN |
| |
| /* |
| * KASAN_SHADOW_START: beginning of the kernel virtual addresses. |
| * KASAN_SHADOW_END: KASAN_SHADOW_START + 1/N of kernel virtual addresses, |
| * where N = (1 << KASAN_SHADOW_SCALE_SHIFT). |
| */ |
| #define KASAN_SHADOW_START (VA_START) |
| #define KASAN_SHADOW_END (KASAN_SHADOW_START + KASAN_SHADOW_SIZE) |
| |
| /* |
| * This value is used to map an address to the corresponding shadow |
| * address by the following formula: |
| * shadow_addr = (address >> KASAN_SHADOW_SCALE_SHIFT) + KASAN_SHADOW_OFFSET |
| * |
| * (1 << (64 - KASAN_SHADOW_SCALE_SHIFT)) shadow addresses that lie in range |
| * [KASAN_SHADOW_OFFSET, KASAN_SHADOW_END) cover all 64-bits of virtual |
| * addresses. So KASAN_SHADOW_OFFSET should satisfy the following equation: |
| * KASAN_SHADOW_OFFSET = KASAN_SHADOW_END - |
| * (1ULL << (64 - KASAN_SHADOW_SCALE_SHIFT)) |
| */ |
| #define KASAN_SHADOW_OFFSET (KASAN_SHADOW_END - (1ULL << \ |
| (64 - KASAN_SHADOW_SCALE_SHIFT))) |
| |
| void kasan_init(void); |
| void kasan_copy_shadow(pgd_t *pgdir); |
| asmlinkage void kasan_early_init(void); |
| |
| #else |
| static inline void kasan_init(void) { } |
| static inline void kasan_copy_shadow(pgd_t *pgdir) { } |
| #endif |
| |
| #endif |
| #endif |