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48 lines
1.5 KiB
48 lines
1.5 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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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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#include <linux/linkage.h> |
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#include <asm/memory.h> |
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#include <asm/mte-kasan.h> |
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#include <asm/pgtable-types.h> |
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#define arch_kasan_set_tag(addr, tag) __tag_set(addr, tag) |
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#define arch_kasan_reset_tag(addr) __tag_reset(addr) |
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#define arch_kasan_get_tag(addr) __tag_get(addr) |
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#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) |
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void kasan_init(void); |
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/* |
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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_START(va) (KASAN_SHADOW_END - (1UL << ((va) - KASAN_SHADOW_SCALE_SHIFT))) |
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#define KASAN_SHADOW_START _KASAN_SHADOW_START(vabits_actual) |
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void kasan_copy_shadow(pgd_t *pgdir); |
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asmlinkage void kasan_early_init(void); |
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#else |
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static inline void kasan_init(void) { } |
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static inline void kasan_copy_shadow(pgd_t *pgdir) { } |
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#endif |
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#endif |
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#endif
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