1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef __ASM_GENERIC_MMAN_COMMON_H
3#define __ASM_GENERIC_MMAN_COMMON_H
4
5/*
6 Author: Michael S. Tsirkin <mst@mellanox.co.il>, Mellanox Technologies Ltd.
7 Based on: asm-xxx/mman.h
8*/
9
10#define PROT_READ 0x1 /* page can be read */
11#define PROT_WRITE 0x2 /* page can be written */
12#define PROT_EXEC 0x4 /* page can be executed */
13#define PROT_SEM 0x8 /* page may be used for atomic ops */
14#define PROT_NONE 0x0 /* page can not be accessed */
15#define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */
16#define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end of growsup vma */
17
18/* 0x01 - 0x03 are defined in linux/mman.h */
19#define MAP_TYPE 0x0f /* Mask for type of mapping */
20#define MAP_FIXED 0x10 /* Interpret addr exactly */
21#define MAP_ANONYMOUS 0x20 /* don't use a file */
22#ifdef CONFIG_MMAP_ALLOW_UNINITIALIZED
23# define MAP_UNINITIALIZED 0x4000000 /* For anonymous mmap, memory could be uninitialized */
24#else
25# define MAP_UNINITIALIZED 0x0 /* Don't support this flag */
26#endif
27
28/* 0x0100 - 0x80000 flags are defined in asm-generic/mman.h */
29#define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED which doesn't unmap underlying mapping */
30
31/*
32 * Flags for mlock
33 */
34#define MLOCK_ONFAULT 0x01 /* Lock pages in range after they are faulted in, do not prefault */
35
36#define MS_ASYNC 1 /* sync memory asynchronously */
37#define MS_INVALIDATE 2 /* invalidate the caches */
38#define MS_SYNC 4 /* synchronous memory sync */
39
40#define MADV_NORMAL 0 /* no further special treatment */
41#define MADV_RANDOM 1 /* expect random page references */
42#define MADV_SEQUENTIAL 2 /* expect sequential page references */
43#define MADV_WILLNEED 3 /* will need these pages */
44#define MADV_DONTNEED 4 /* don't need these pages */
45
46/* common parameters: try to keep these consistent across architectures */
47#define MADV_FREE 8 /* free pages only if memory pressure */
48#define MADV_REMOVE 9 /* remove these pages & resources */
49#define MADV_DONTFORK 10 /* don't inherit across fork */
50#define MADV_DOFORK 11 /* do inherit across fork */
51#define MADV_HWPOISON 100 /* poison a page for testing */
52#define MADV_SOFT_OFFLINE 101 /* soft offline page for testing */
53
54#define MADV_MERGEABLE 12 /* KSM may merge identical pages */
55#define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages */
56
57#define MADV_HUGEPAGE 14 /* Worth backing with hugepages */
58#define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */
59
60#define MADV_DONTDUMP 16 /* Explicity exclude from the core dump,
61 overrides the coredump filter bits */
62#define MADV_DODUMP 17 /* Clear the MADV_DONTDUMP flag */
63
64#define MADV_WIPEONFORK 18 /* Zero memory on fork, child only */
65#define MADV_KEEPONFORK 19 /* Undo MADV_WIPEONFORK */
66
67/* compatibility flags */
68#define MAP_FILE 0
69
70#define PKEY_DISABLE_ACCESS 0x1
71#define PKEY_DISABLE_WRITE 0x2
72#define PKEY_ACCESS_MASK (PKEY_DISABLE_ACCESS |\
73 PKEY_DISABLE_WRITE)
74
75#endif /* __ASM_GENERIC_MMAN_COMMON_H */
76