1 /* SPDX-License-Identifier: GPL-2.0 */
7 #include <linux/linkage.h>
8 #include <asm/memory.h>
9 #include <asm/mte-kasan.h>
10 #include <asm/pgtable-types.h>
12 #define arch_kasan_set_tag(addr, tag) __tag_set(addr, tag)
13 #define arch_kasan_reset_tag(addr) __tag_reset(addr)
14 #define arch_kasan_get_tag(addr) __tag_get(addr)
16 #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)
18 void kasan_init(void);
21 * KASAN_SHADOW_START: beginning of the kernel virtual addresses.
22 * KASAN_SHADOW_END: KASAN_SHADOW_START + 1/N of kernel virtual addresses,
23 * where N = (1 << KASAN_SHADOW_SCALE_SHIFT).
25 * KASAN_SHADOW_OFFSET:
26 * This value is used to map an address to the corresponding shadow
27 * address by the following formula:
28 * shadow_addr = (address >> KASAN_SHADOW_SCALE_SHIFT) + KASAN_SHADOW_OFFSET
30 * (1 << (64 - KASAN_SHADOW_SCALE_SHIFT)) shadow addresses that lie in range
31 * [KASAN_SHADOW_OFFSET, KASAN_SHADOW_END) cover all 64-bits of virtual
32 * addresses. So KASAN_SHADOW_OFFSET should satisfy the following equation:
33 * KASAN_SHADOW_OFFSET = KASAN_SHADOW_END -
34 * (1ULL << (64 - KASAN_SHADOW_SCALE_SHIFT))
36 #define _KASAN_SHADOW_START(va) (KASAN_SHADOW_END - (1UL << ((va) - KASAN_SHADOW_SCALE_SHIFT)))
37 #define KASAN_SHADOW_START _KASAN_SHADOW_START(vabits_actual)
39 void kasan_copy_shadow(pgd_t *pgdir);
40 asmlinkage void kasan_early_init(void);
43 static inline void kasan_init(void) { }
44 static inline void kasan_copy_shadow(pgd_t *pgdir) { }