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