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41 lines
1.4 KiB
41 lines
1.4 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* Copyright (C) 2019 Andes Technology Corporation */ |
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#ifndef __ASM_KASAN_H |
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#define __ASM_KASAN_H |
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#ifndef __ASSEMBLY__ |
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#ifdef CONFIG_KASAN |
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/* |
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* The following comment was copied from arm64: |
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* KASAN_SHADOW_START: beginning of the kernel virtual addresses. |
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* KASAN_SHADOW_END: KASAN_SHADOW_START + 1/N of kernel virtual addresses, |
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* where N = (1 << KASAN_SHADOW_SCALE_SHIFT). |
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* |
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* KASAN_SHADOW_OFFSET: |
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* This value is used to map an address to the corresponding shadow |
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* address by the following formula: |
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* shadow_addr = (address >> KASAN_SHADOW_SCALE_SHIFT) + KASAN_SHADOW_OFFSET |
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* |
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* (1 << (64 - KASAN_SHADOW_SCALE_SHIFT)) shadow addresses that lie in range |
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* [KASAN_SHADOW_OFFSET, KASAN_SHADOW_END) cover all 64-bits of virtual |
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* addresses. So KASAN_SHADOW_OFFSET should satisfy the following equation: |
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* KASAN_SHADOW_OFFSET = KASAN_SHADOW_END - |
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* (1ULL << (64 - KASAN_SHADOW_SCALE_SHIFT)) |
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*/ |
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#define KASAN_SHADOW_SCALE_SHIFT 3 |
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#define KASAN_SHADOW_SIZE (UL(1) << ((CONFIG_VA_BITS - 1) - KASAN_SHADOW_SCALE_SHIFT)) |
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#define KASAN_SHADOW_START KERN_VIRT_START |
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#define KASAN_SHADOW_END (KASAN_SHADOW_START + KASAN_SHADOW_SIZE) |
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#define KASAN_SHADOW_OFFSET (KASAN_SHADOW_END - (1ULL << \ |
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(64 - KASAN_SHADOW_SCALE_SHIFT))) |
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void kasan_init(void); |
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asmlinkage void kasan_early_init(void); |
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#endif |
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#endif |
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#endif /* __ASM_KASAN_H */
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