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/* SPDX-License-Identifier: GPL-2.0 */ /* Copyright (C) 2019 Andes Technology Corporation */ #ifndef __ASM_KASAN_H #define __ASM_KASAN_H #ifndef __ASSEMBLY__ #ifdef CONFIG_KASAN /* * The following comment was copied from arm64: * 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). * * KASAN_SHADOW_OFFSET: * 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_SCALE_SHIFT 3 #define KASAN_SHADOW_SIZE (UL(1) << ((CONFIG_VA_BITS - 1) - KASAN_SHADOW_SCALE_SHIFT)) #define KASAN_SHADOW_START KERN_VIRT_START #define KASAN_SHADOW_END (KASAN_SHADOW_START + KASAN_SHADOW_SIZE) #define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL) void kasan_init(void); asmlinkage void kasan_early_init(void); #endif #endif #endif /* __ASM_KASAN_H */