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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_KASAN_H
#define _ASM_X86_KASAN_H
#include <linux/const.h>
#define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL)
#define KASAN_SHADOW_SCALE_SHIFT 3
/*
* Compiler uses shadow offset assuming that addresses start
* from 0. Kernel addresses don't start from 0, so shadow
* for kernel really starts from compiler's shadow offset +
* 'kernel address space start' >> KASAN_SHADOW_SCALE_SHIFT
*/
#define KASAN_SHADOW_START (KASAN_SHADOW_OFFSET + \
((-1UL << __VIRTUAL_MASK_SHIFT) >> \
KASAN_SHADOW_SCALE_SHIFT))
/*
* 47 bits for kernel address -> (47 - KASAN_SHADOW_SCALE_SHIFT) bits for shadow
* 56 bits for kernel address -> (56 - KASAN_SHADOW_SCALE_SHIFT) bits for shadow
*/
#define KASAN_SHADOW_END (KASAN_SHADOW_START + \
(1ULL << (__VIRTUAL_MASK_SHIFT - \
KASAN_SHADOW_SCALE_SHIFT)))
#ifndef __ASSEMBLY__
#ifdef CONFIG_KASAN
void __init kasan_early_init(void);
void __init kasan_init(void);
void __init kasan_populate_shadow_for_vaddr(void *va, size_t size, int nid);
#else
static inline void kasan_early_init(void) { }
static inline void kasan_init(void) { }
static inline void kasan_populate_shadow_for_vaddr(void *va, size_t size,
int nid) { }
#endif
#endif
#endif