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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_KASAN_H
#define __ASM_KASAN_H
#ifndef __ASSEMBLY__
#include <linux/linkage.h>
#include <linux/mmzone.h>
#include <asm/addrspace.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#define KASAN_SHADOW_SCALE_SHIFT 3
#define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL)
#define XRANGE_SHIFT (48)
/* Valid address length */
#define XRANGE_SHADOW_SHIFT min(cpu_vabits, VA_BITS)
/* Used for taking out the valid address */
#define XRANGE_SHADOW_MASK GENMASK_ULL(XRANGE_SHADOW_SHIFT - 1, 0)
/* One segment whole address space size */
#define XRANGE_SIZE (XRANGE_SHADOW_MASK + 1)
/* 64-bit segment value. */
#define XKPRANGE_UC_SEG (0x8000)
#define XKPRANGE_CC_SEG (0x9000)
#define XKPRANGE_WC_SEG (0xa000)
#define XKVRANGE_VC_SEG (0xffff)
/* Cached */
#define XKPRANGE_CC_START CACHE_BASE
#define XKPRANGE_CC_SIZE XRANGE_SIZE
#define XKPRANGE_CC_KASAN_OFFSET (0)
#define XKPRANGE_CC_SHADOW_SIZE (XKPRANGE_CC_SIZE >> KASAN_SHADOW_SCALE_SHIFT)
#define XKPRANGE_CC_SHADOW_END (XKPRANGE_CC_KASAN_OFFSET + XKPRANGE_CC_SHADOW_SIZE)
/* UnCached */
#define XKPRANGE_UC_START UNCACHE_BASE
#define XKPRANGE_UC_SIZE XRANGE_SIZE
#define XKPRANGE_UC_KASAN_OFFSET XKPRANGE_CC_SHADOW_END
#define XKPRANGE_UC_SHADOW_SIZE (XKPRANGE_UC_SIZE >> KASAN_SHADOW_SCALE_SHIFT)
#define XKPRANGE_UC_SHADOW_END (XKPRANGE_UC_KASAN_OFFSET + XKPRANGE_UC_SHADOW_SIZE)
/* WriteCombine */
#define XKPRANGE_WC_START WRITECOMBINE_BASE
#define XKPRANGE_WC_SIZE XRANGE_SIZE
#define XKPRANGE_WC_KASAN_OFFSET XKPRANGE_UC_SHADOW_END
#define XKPRANGE_WC_SHADOW_SIZE (XKPRANGE_WC_SIZE >> KASAN_SHADOW_SCALE_SHIFT)
#define XKPRANGE_WC_SHADOW_END (XKPRANGE_WC_KASAN_OFFSET + XKPRANGE_WC_SHADOW_SIZE)
/* VMALLOC (Cached or UnCached) */
#define XKVRANGE_VC_START MODULES_VADDR
#define XKVRANGE_VC_SIZE round_up(KFENCE_AREA_END - MODULES_VADDR + 1, PGDIR_SIZE)
#define XKVRANGE_VC_KASAN_OFFSET XKPRANGE_WC_SHADOW_END
#define XKVRANGE_VC_SHADOW_SIZE (XKVRANGE_VC_SIZE >> KASAN_SHADOW_SCALE_SHIFT)
#define XKVRANGE_VC_SHADOW_END (XKVRANGE_VC_KASAN_OFFSET + XKVRANGE_VC_SHADOW_SIZE)
/* KAsan shadow memory start right after vmalloc. */
#define KASAN_SHADOW_START round_up(KFENCE_AREA_END, PGDIR_SIZE)
#define KASAN_SHADOW_SIZE (XKVRANGE_VC_SHADOW_END - XKPRANGE_CC_KASAN_OFFSET)
#define KASAN_SHADOW_END (round_up(KASAN_SHADOW_START + KASAN_SHADOW_SIZE, PGDIR_SIZE) - 1)
#define XKPRANGE_CC_SHADOW_OFFSET (KASAN_SHADOW_START + XKPRANGE_CC_KASAN_OFFSET)
#define XKPRANGE_UC_SHADOW_OFFSET (KASAN_SHADOW_START + XKPRANGE_UC_KASAN_OFFSET)
#define XKPRANGE_WC_SHADOW_OFFSET (KASAN_SHADOW_START + XKPRANGE_WC_KASAN_OFFSET)
#define XKVRANGE_VC_SHADOW_OFFSET (KASAN_SHADOW_START + XKVRANGE_VC_KASAN_OFFSET)
extern bool kasan_early_stage;
extern unsigned char kasan_early_shadow_page[PAGE_SIZE];
#define kasan_mem_to_shadow kasan_mem_to_shadow
void *kasan_mem_to_shadow(const void *addr);
#define kasan_shadow_to_mem kasan_shadow_to_mem
const void *kasan_shadow_to_mem(const void *shadow_addr);
#define kasan_arch_is_ready kasan_arch_is_ready
static __always_inline bool kasan_arch_is_ready(void)
{
return !kasan_early_stage;
}
#define addr_has_metadata addr_has_metadata
static __always_inline bool addr_has_metadata(const void *addr)
{
return (kasan_mem_to_shadow((void *)addr) != NULL);
}
void kasan_init(void);
asmlinkage void kasan_early_init(void);
#endif
#endif
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