| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|
| 2 | #ifndef _ASM_GENERIC_CACHEFLUSH_H |
|---|
| 3 | #define _ASM_GENERIC_CACHEFLUSH_H |
|---|
| 4 | |
|---|
| 5 | #include <linux/instrumented.h> |
|---|
| 6 | |
|---|
| 7 | struct mm_struct; |
|---|
| 8 | struct vm_area_struct; |
|---|
| 9 | struct page; |
|---|
| 10 | struct address_space; |
|---|
| 11 | |
|---|
| 12 | /* |
|---|
| 13 | * The cache doesn't need to be flushed when TLB entries change when |
|---|
| 14 | * the cache is mapped to physical memory, not virtual memory |
|---|
| 15 | */ |
|---|
| 16 | #ifndef flush_cache_all |
|---|
| 17 | static inline void flush_cache_all(void) |
|---|
| 18 | { |
|---|
| 19 | } |
|---|
| 20 | #endif |
|---|
| 21 | |
|---|
| 22 | #ifndef flush_cache_mm |
|---|
| 23 | static inline void flush_cache_mm(struct mm_struct *mm) |
|---|
| 24 | { |
|---|
| 25 | } |
|---|
| 26 | #endif |
|---|
| 27 | |
|---|
| 28 | #ifndef flush_cache_dup_mm |
|---|
| 29 | static inline void flush_cache_dup_mm(struct mm_struct *mm) |
|---|
| 30 | { |
|---|
| 31 | } |
|---|
| 32 | #endif |
|---|
| 33 | |
|---|
| 34 | #ifndef flush_cache_range |
|---|
| 35 | static inline void flush_cache_range(struct vm_area_struct *vma, |
|---|
| 36 | unsigned long start, |
|---|
| 37 | unsigned long end) |
|---|
| 38 | { |
|---|
| 39 | } |
|---|
| 40 | #endif |
|---|
| 41 | |
|---|
| 42 | #ifndef flush_cache_page |
|---|
| 43 | static inline void flush_cache_page(struct vm_area_struct *vma, |
|---|
| 44 | unsigned long vmaddr, |
|---|
| 45 | unsigned long pfn) |
|---|
| 46 | { |
|---|
| 47 | } |
|---|
| 48 | #endif |
|---|
| 49 | |
|---|
| 50 | #ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE |
|---|
| 51 | static inline void flush_dcache_page(struct page *page) |
|---|
| 52 | { |
|---|
| 53 | } |
|---|
| 54 | |
|---|
| 55 | #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0 |
|---|
| 56 | #endif |
|---|
| 57 | |
|---|
| 58 | #ifndef flush_dcache_mmap_lock |
|---|
| 59 | static inline void flush_dcache_mmap_lock(struct address_space *mapping) |
|---|
| 60 | { |
|---|
| 61 | } |
|---|
| 62 | #endif |
|---|
| 63 | |
|---|
| 64 | #ifndef flush_dcache_mmap_unlock |
|---|
| 65 | static inline void flush_dcache_mmap_unlock(struct address_space *mapping) |
|---|
| 66 | { |
|---|
| 67 | } |
|---|
| 68 | #endif |
|---|
| 69 | |
|---|
| 70 | #ifndef flush_icache_range |
|---|
| 71 | static inline void flush_icache_range(unsigned long start, unsigned long end) |
|---|
| 72 | { |
|---|
| 73 | } |
|---|
| 74 | #endif |
|---|
| 75 | |
|---|
| 76 | #ifndef flush_icache_user_range |
|---|
| 77 | #define flush_icache_user_range flush_icache_range |
|---|
| 78 | #endif |
|---|
| 79 | |
|---|
| 80 | #ifndef flush_icache_user_page |
|---|
| 81 | static inline void flush_icache_user_page(struct vm_area_struct *vma, |
|---|
| 82 | struct page *page, |
|---|
| 83 | unsigned long addr, int len) |
|---|
| 84 | { |
|---|
| 85 | } |
|---|
| 86 | #endif |
|---|
| 87 | |
|---|
| 88 | #ifndef flush_cache_vmap |
|---|
| 89 | static inline void flush_cache_vmap(unsigned long start, unsigned long end) |
|---|
| 90 | { |
|---|
| 91 | } |
|---|
| 92 | #endif |
|---|
| 93 | |
|---|
| 94 | #ifndef flush_cache_vmap_early |
|---|
| 95 | static inline void flush_cache_vmap_early(unsigned long start, unsigned long end) |
|---|
| 96 | { |
|---|
| 97 | } |
|---|
| 98 | #endif |
|---|
| 99 | |
|---|
| 100 | #ifndef flush_cache_vunmap |
|---|
| 101 | static inline void flush_cache_vunmap(unsigned long start, unsigned long end) |
|---|
| 102 | { |
|---|
| 103 | } |
|---|
| 104 | #endif |
|---|
| 105 | |
|---|
| 106 | #ifndef copy_to_user_page |
|---|
| 107 | #define copy_to_user_page(vma, page, vaddr, dst, src, len) \ |
|---|
| 108 | do { \ |
|---|
| 109 | instrument_copy_to_user((void __user *)dst, src, len); \ |
|---|
| 110 | memcpy(dst, src, len); \ |
|---|
| 111 | flush_icache_user_page(vma, page, vaddr, len); \ |
|---|
| 112 | } while (0) |
|---|
| 113 | #endif |
|---|
| 114 | |
|---|
| 115 | |
|---|
| 116 | #ifndef copy_from_user_page |
|---|
| 117 | #define copy_from_user_page(vma, page, vaddr, dst, src, len) \ |
|---|
| 118 | do { \ |
|---|
| 119 | instrument_copy_from_user_before(dst, (void __user *)src, \ |
|---|
| 120 | len); \ |
|---|
| 121 | memcpy(dst, src, len); \ |
|---|
| 122 | instrument_copy_from_user_after(dst, (void __user *)src, len, \ |
|---|
| 123 | 0); \ |
|---|
| 124 | } while (0) |
|---|
| 125 | #endif |
|---|
| 126 | |
|---|
| 127 | #endif /* _ASM_GENERIC_CACHEFLUSH_H */ |
|---|
| 128 | |
|---|
