Linux kernel mirror (for testing)
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linux
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
11static inline int set_memory_ro(unsigned long addr, int numpages) { return 0; }
12static inline int set_memory_rw(unsigned long addr, int numpages) { return 0; }
13static inline int set_memory_x(unsigned long addr, int numpages) { return 0; }
14static inline int set_memory_nx(unsigned long addr, int numpages) { return 0; }
15#endif
16
17#ifndef CONFIG_ARCH_HAS_SET_DIRECT_MAP
18static inline int set_direct_map_invalid_noflush(struct page *page)
19{
20 return 0;
21}
22static inline int set_direct_map_default_noflush(struct page *page)
23{
24 return 0;
25}
26
27static 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
37static 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#ifndef set_mce_nospec
46static inline int set_mce_nospec(unsigned long pfn, bool unmap)
47{
48 return 0;
49}
50#endif
51
52#ifndef clear_mce_nospec
53static inline int clear_mce_nospec(unsigned long pfn)
54{
55 return 0;
56}
57#endif
58
59#ifndef CONFIG_ARCH_HAS_MEM_ENCRYPT
60static inline int set_memory_encrypted(unsigned long addr, int numpages)
61{
62 return 0;
63}
64
65static 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_ */