projects / thirdparty / kernel / stable.git / blame
| Commit | Line | Data |
|---|---|---|
| 5aa4ac64 QZ |
1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef __ASM_KASAN_H | |
| 3 | #define __ASM_KASAN_H | |
| 4 | ||
| 5 | #ifndef __ASSEMBLY__ | |
| 6 | ||
| 7 | #include <linux/linkage.h> | |
| 8 | #include <linux/mmzone.h> | |
| 9 | #include <asm/addrspace.h> | |
| 10 | #include <asm/io.h> | |
| 11 | #include <asm/pgtable.h> | |
| 12 | ||
| 5aa4ac64 QZ |
13 | #define KASAN_SHADOW_SCALE_SHIFT 3 |
| 14 | #define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL) | |
| 15 | ||
| 16 | #define XRANGE_SHIFT (48) | |
| 17 | ||
| 18 | /* Valid address length */ | |
| 19 | #define XRANGE_SHADOW_SHIFT (PGDIR_SHIFT + PAGE_SHIFT - 3) | |
| 20 | /* Used for taking out the valid address */ | |
| 21 | #define XRANGE_SHADOW_MASK GENMASK_ULL(XRANGE_SHADOW_SHIFT - 1, 0) | |
| 22 | /* One segment whole address space size */ | |
| 23 | #define XRANGE_SIZE (XRANGE_SHADOW_MASK + 1) | |
| 24 | ||
| 25 | /* 64-bit segment value. */ | |
| 26 | #define XKPRANGE_UC_SEG (0x8000) | |
| 27 | #define XKPRANGE_CC_SEG (0x9000) | |
| 28 | #define XKVRANGE_VC_SEG (0xffff) | |
| 29 | ||
| 30 | /* Cached */ | |
| 31 | #define XKPRANGE_CC_START CACHE_BASE | |
| 32 | #define XKPRANGE_CC_SIZE XRANGE_SIZE | |
| 33 | #define XKPRANGE_CC_KASAN_OFFSET (0) | |
| 34 | #define XKPRANGE_CC_SHADOW_SIZE (XKPRANGE_CC_SIZE >> KASAN_SHADOW_SCALE_SHIFT) | |
| 35 | #define XKPRANGE_CC_SHADOW_END (XKPRANGE_CC_KASAN_OFFSET + XKPRANGE_CC_SHADOW_SIZE) | |
| 36 | ||
| 37 | /* UnCached */ | |
| 38 | #define XKPRANGE_UC_START UNCACHE_BASE | |
| 39 | #define XKPRANGE_UC_SIZE XRANGE_SIZE | |
| 40 | #define XKPRANGE_UC_KASAN_OFFSET XKPRANGE_CC_SHADOW_END | |
| 41 | #define XKPRANGE_UC_SHADOW_SIZE (XKPRANGE_UC_SIZE >> KASAN_SHADOW_SCALE_SHIFT) | |
| 42 | #define XKPRANGE_UC_SHADOW_END (XKPRANGE_UC_KASAN_OFFSET + XKPRANGE_UC_SHADOW_SIZE) | |
| 43 | ||
| 44 | /* VMALLOC (Cached or UnCached) */ | |
| 45 | #define XKVRANGE_VC_START MODULES_VADDR | |
| 46 | #define XKVRANGE_VC_SIZE round_up(KFENCE_AREA_END - MODULES_VADDR + 1, PGDIR_SIZE) | |
| 47 | #define XKVRANGE_VC_KASAN_OFFSET XKPRANGE_UC_SHADOW_END | |
| 48 | #define XKVRANGE_VC_SHADOW_SIZE (XKVRANGE_VC_SIZE >> KASAN_SHADOW_SCALE_SHIFT) | |
| 49 | #define XKVRANGE_VC_SHADOW_END (XKVRANGE_VC_KASAN_OFFSET + XKVRANGE_VC_SHADOW_SIZE) | |
| 50 | ||
| 51 | /* KAsan shadow memory start right after vmalloc. */ | |
| 52 | #define KASAN_SHADOW_START round_up(KFENCE_AREA_END, PGDIR_SIZE) | |
| 53 | #define KASAN_SHADOW_SIZE (XKVRANGE_VC_SHADOW_END - XKPRANGE_CC_KASAN_OFFSET) | |
| 54 | #define KASAN_SHADOW_END round_up(KASAN_SHADOW_START + KASAN_SHADOW_SIZE, PGDIR_SIZE) | |
| 55 | ||
| 56 | #define XKPRANGE_CC_SHADOW_OFFSET (KASAN_SHADOW_START + XKPRANGE_CC_KASAN_OFFSET) | |
| 57 | #define XKPRANGE_UC_SHADOW_OFFSET (KASAN_SHADOW_START + XKPRANGE_UC_KASAN_OFFSET) | |
| 58 | #define XKVRANGE_VC_SHADOW_OFFSET (KASAN_SHADOW_START + XKVRANGE_VC_KASAN_OFFSET) | |
| 59 | ||
| 60 | extern bool kasan_early_stage; | |
| 61 | extern unsigned char kasan_early_shadow_page[PAGE_SIZE]; | |
| 62 | ||
| 2a86f1b5 | 63 | #define kasan_mem_to_shadow kasan_mem_to_shadow |
| 99e5a247 | 64 | void *kasan_mem_to_shadow(const void *addr); |
| 5aa4ac64 | 65 | |
| 2a86f1b5 | 66 | #define kasan_shadow_to_mem kasan_shadow_to_mem |
| 99e5a247 HC |
67 | const void *kasan_shadow_to_mem(const void *shadow_addr); |
| 68 | ||
| 69 | #define kasan_arch_is_ready kasan_arch_is_ready | |
| 70 | static __always_inline bool kasan_arch_is_ready(void) | |
| 5aa4ac64 | 71 | { |
| 99e5a247 | 72 | return !kasan_early_stage; |
| 5aa4ac64 QZ |
73 | } |
| 74 | ||
| 2a86f1b5 HC |
75 | #define addr_has_metadata addr_has_metadata |
| 76 | static __always_inline bool addr_has_metadata(const void *addr) | |
| 77 | { | |
| 78 | return (kasan_mem_to_shadow((void *)addr) != NULL); | |
| 79 | } | |
| 80 | ||
| 5aa4ac64 QZ |
81 | void kasan_init(void); |
| 82 | asmlinkage void kasan_early_init(void); | |
| 83 | ||
| 84 | #endif | |
| 85 | #endif |