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 | |