| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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| 2 | /* |
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| 3 | * Copyright 2017, Michael Ellerman, IBM Corporation. |
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| 4 | */ |
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| 5 | #ifndef _LINUX_SET_MEMORY_H_ |
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| 6 | #define _LINUX_SET_MEMORY_H_ |
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| 7 | |
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| 8 | #ifdef CONFIG_ARCH_HAS_SET_MEMORY |
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| 9 | #include <asm/set_memory.h> |
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| 10 | #else |
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| 11 | static inline int __must_check set_memory_ro(unsigned long addr, int numpages) { return 0; } |
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| 12 | static inline int __must_check set_memory_rw(unsigned long addr, int numpages) { return 0; } |
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| 13 | static inline int __must_check set_memory_x(unsigned long addr, int numpages) { return 0; } |
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| 14 | static inline int __must_check set_memory_nx(unsigned long addr, int numpages) { return 0; } |
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| 15 | #endif |
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| 16 | |
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| 17 | #ifndef set_memory_rox |
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| 18 | static inline int set_memory_rox(unsigned long addr, int numpages) |
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| 19 | { |
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| 20 | int ret = set_memory_ro(addr, numpages); |
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| 21 | if (ret) |
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| 22 | return ret; |
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| 23 | return set_memory_x(addr, numpages); |
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| 24 | } |
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| 25 | #endif |
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| 26 | |
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| 27 | #ifndef CONFIG_ARCH_HAS_SET_DIRECT_MAP |
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| 28 | static inline int set_direct_map_invalid_noflush(struct page *page) |
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| 29 | { |
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| 30 | return 0; |
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| 31 | } |
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| 32 | static inline int set_direct_map_default_noflush(struct page *page) |
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| 33 | { |
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| 34 | return 0; |
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| 35 | } |
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| 36 | |
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| 37 | static inline int set_direct_map_valid_noflush(struct page *page, |
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| 38 | unsigned nr, bool valid) |
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| 39 | { |
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| 40 | return 0; |
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| 41 | } |
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| 42 | |
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| 43 | static inline bool kernel_page_present(struct page *page) |
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| 44 | { |
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| 45 | return true; |
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| 46 | } |
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| 47 | #else /* CONFIG_ARCH_HAS_SET_DIRECT_MAP */ |
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| 48 | /* |
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| 49 | * Some architectures, e.g. ARM64 can disable direct map modifications at |
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| 50 | * boot time. Let them overrive this query. |
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| 51 | */ |
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| 52 | #ifndef can_set_direct_map |
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| 53 | static inline bool can_set_direct_map(void) |
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| 54 | { |
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| 55 | return true; |
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| 56 | } |
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| 57 | #define can_set_direct_map can_set_direct_map |
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| 58 | #endif |
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| 59 | #endif /* CONFIG_ARCH_HAS_SET_DIRECT_MAP */ |
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| 60 | |
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| 61 | #ifdef CONFIG_X86_64 |
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| 62 | int set_mce_nospec(unsigned long pfn); |
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| 63 | int clear_mce_nospec(unsigned long pfn); |
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| 64 | #else |
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| 65 | static inline int set_mce_nospec(unsigned long pfn) |
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| 66 | { |
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| 67 | return 0; |
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| 68 | } |
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| 69 | static inline int clear_mce_nospec(unsigned long pfn) |
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| 70 | { |
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| 71 | return 0; |
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| 72 | } |
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| 73 | #endif |
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| 74 | |
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| 75 | #ifndef CONFIG_ARCH_HAS_MEM_ENCRYPT |
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| 76 | static inline int set_memory_encrypted(unsigned long addr, int numpages) |
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| 77 | { |
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| 78 | return 0; |
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| 79 | } |
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| 80 | |
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| 81 | static inline int set_memory_decrypted(unsigned long addr, int numpages) |
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| 82 | { |
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| 83 | return 0; |
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| 84 | } |
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| 85 | #endif /* CONFIG_ARCH_HAS_MEM_ENCRYPT */ |
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| 86 | |
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| 87 | #endif /* _LINUX_SET_MEMORY_H_ */ |
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| 88 | |
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