1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _ASM_X86_SET_MEMORY_H |
3 | #define _ASM_X86_SET_MEMORY_H |
4 | |
5 | #include <linux/mm.h> |
6 | #include <asm/page.h> |
7 | #include <asm-generic/set_memory.h> |
8 | |
9 | #define set_memory_rox set_memory_rox |
10 | int set_memory_rox(unsigned long addr, int numpages); |
11 | |
12 | /* |
13 | * The set_memory_* API can be used to change various attributes of a virtual |
14 | * address range. The attributes include: |
15 | * Cacheability : UnCached, WriteCombining, WriteThrough, WriteBack |
16 | * Executability : eXecutable, NoteXecutable |
17 | * Read/Write : ReadOnly, ReadWrite |
18 | * Presence : NotPresent |
19 | * Encryption : Encrypted, Decrypted |
20 | * |
21 | * Within a category, the attributes are mutually exclusive. |
22 | * |
23 | * The implementation of this API will take care of various aspects that |
24 | * are associated with changing such attributes, such as: |
25 | * - Flushing TLBs |
26 | * - Flushing CPU caches |
27 | * - Making sure aliases of the memory behind the mapping don't violate |
28 | * coherency rules as defined by the CPU in the system. |
29 | * |
30 | * What this API does not do: |
31 | * - Provide exclusion between various callers - including callers that |
32 | * operation on other mappings of the same physical page |
33 | * - Restore default attributes when a page is freed |
34 | * - Guarantee that mappings other than the requested one are |
35 | * in any state, other than that these do not violate rules for |
36 | * the CPU you have. Do not depend on any effects on other mappings, |
37 | * CPUs other than the one you have may have more relaxed rules. |
38 | * The caller is required to take care of these. |
39 | */ |
40 | |
41 | int __set_memory_prot(unsigned long addr, int numpages, pgprot_t prot); |
42 | int _set_memory_uc(unsigned long addr, int numpages); |
43 | int _set_memory_wc(unsigned long addr, int numpages); |
44 | int _set_memory_wt(unsigned long addr, int numpages); |
45 | int _set_memory_wb(unsigned long addr, int numpages); |
46 | int set_memory_uc(unsigned long addr, int numpages); |
47 | int set_memory_wc(unsigned long addr, int numpages); |
48 | int set_memory_wb(unsigned long addr, int numpages); |
49 | int set_memory_np(unsigned long addr, int numpages); |
50 | int set_memory_4k(unsigned long addr, int numpages); |
51 | int set_memory_encrypted(unsigned long addr, int numpages); |
52 | int set_memory_decrypted(unsigned long addr, int numpages); |
53 | int set_memory_np_noalias(unsigned long addr, int numpages); |
54 | int set_memory_nonglobal(unsigned long addr, int numpages); |
55 | int set_memory_global(unsigned long addr, int numpages); |
56 | |
57 | int set_pages_array_uc(struct page **pages, int addrinarray); |
58 | int set_pages_array_wc(struct page **pages, int addrinarray); |
59 | int set_pages_array_wb(struct page **pages, int addrinarray); |
60 | |
61 | /* |
62 | * For legacy compatibility with the old APIs, a few functions |
63 | * are provided that work on a "struct page". |
64 | * These functions operate ONLY on the 1:1 kernel mapping of the |
65 | * memory that the struct page represents, and internally just |
66 | * call the set_memory_* function. See the description of the |
67 | * set_memory_* function for more details on conventions. |
68 | * |
69 | * These APIs should be considered *deprecated* and are likely going to |
70 | * be removed in the future. |
71 | * The reason for this is the implicit operation on the 1:1 mapping only, |
72 | * making this not a generally useful API. |
73 | * |
74 | * Specifically, many users of the old APIs had a virtual address, |
75 | * called virt_to_page() or vmalloc_to_page() on that address to |
76 | * get a struct page* that the old API required. |
77 | * To convert these cases, use set_memory_*() on the original |
78 | * virtual address, do not use these functions. |
79 | */ |
80 | |
81 | int set_pages_uc(struct page *page, int numpages); |
82 | int set_pages_wb(struct page *page, int numpages); |
83 | int set_pages_ro(struct page *page, int numpages); |
84 | int set_pages_rw(struct page *page, int numpages); |
85 | |
86 | int set_direct_map_invalid_noflush(struct page *page); |
87 | int set_direct_map_default_noflush(struct page *page); |
88 | bool kernel_page_present(struct page *page); |
89 | |
90 | extern int kernel_set_to_readonly; |
91 | |
92 | #endif /* _ASM_X86_SET_MEMORY_H */ |
93 | |