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#define MAP_SHARED 0x01 /* Share changes */
19#define MAP_PRIVATE 0x02 /* Changes are private */
20#define MAP_SHARED_VALIDATE 0x03 /* share + validate extension flags */
21#define MAP_TYPE 0x0f /* Mask for type of mapping */
22#define MAP_FIXED 0x10 /* Interpret addr exactly */
23#define MAP_ANONYMOUS 0x20 /* don't use a file */
24#ifdef CONFIG_MMAP_ALLOW_UNINITIALIZED
25# define MAP_UNINITIALIZED 0x4000000 /* For anonymous mmap, memory could be uninitialized */
26#else
27# define MAP_UNINITIALIZED 0x0 /* Don't support this flag */
28#endif
29
30/* 0x0100 - 0x80000 flags are defined in asm-generic/mman.h */
31#define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED which doesn't unmap underlying mapping */
32
33/*
34 * Flags for mlock
35 */
36#define MLOCK_ONFAULT 0x01 /* Lock pages in range after they are faulted in, do not prefault */
37
38#define MS_ASYNC 1 /* sync memory asynchronously */
39#define MS_INVALIDATE 2 /* invalidate the caches */
40#define MS_SYNC 4 /* synchronous memory sync */
41
42#define MADV_NORMAL 0 /* no further special treatment */
43#define MADV_RANDOM 1 /* expect random page references */
44#define MADV_SEQUENTIAL 2 /* expect sequential page references */
45#define MADV_WILLNEED 3 /* will need these pages */
46#define MADV_DONTNEED 4 /* don't need these pages */
47
48/* common parameters: try to keep these consistent across architectures */
49#define MADV_FREE 8 /* free pages only if memory pressure */
50#define MADV_REMOVE 9 /* remove these pages & resources */
51#define MADV_DONTFORK 10 /* don't inherit across fork */
52#define MADV_DOFORK 11 /* do inherit across fork */
53#define MADV_HWPOISON 100 /* poison a page for testing */
54#define MADV_SOFT_OFFLINE 101 /* soft offline page for testing */
55
56#define MADV_MERGEABLE 12 /* KSM may merge identical pages */
57#define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages */
58
59#define MADV_HUGEPAGE 14 /* Worth backing with hugepages */
60#define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */
61
62#define MADV_DONTDUMP 16 /* Explicity exclude from the core dump,
63 overrides the coredump filter bits */
64#define MADV_DODUMP 17 /* Clear the MADV_DONTDUMP flag */
65
66#define MADV_WIPEONFORK 18 /* Zero memory on fork, child only */
67#define MADV_KEEPONFORK 19 /* Undo MADV_WIPEONFORK */
68
69/* compatibility flags */
70#define MAP_FILE 0
71
72#define PKEY_DISABLE_ACCESS 0x1
73#define PKEY_DISABLE_WRITE 0x2
74#define PKEY_ACCESS_MASK (PKEY_DISABLE_ACCESS |\
75 PKEY_DISABLE_WRITE)
76
77#endif /* __ASM_GENERIC_MMAN_COMMON_H */
78