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