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
6 Author: Michael S. Tsirkin <mst@mellanox.co.il>, Mellanox Technologies Ltd.
7 Based on: asm-xxx/mman.h
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 */
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 */
27 # define MAP_UNINITIALIZED 0x0 /* Don't support this flag */
33 #define MLOCK_ONFAULT 0x01 /* Lock pages in range after they are faulted in, do not prefault */
35 #define MS_ASYNC 1 /* sync memory asynchronously */
36 #define MS_INVALIDATE 2 /* invalidate the caches */
37 #define MS_SYNC 4 /* synchronous memory sync */
39 #define MADV_NORMAL 0 /* no further special treatment */
40 #define MADV_RANDOM 1 /* expect random page references */
41 #define MADV_SEQUENTIAL 2 /* expect sequential page references */
42 #define MADV_WILLNEED 3 /* will need these pages */
43 #define MADV_DONTNEED 4 /* don't need these pages */
45 /* common parameters: try to keep these consistent across architectures */
46 #define MADV_FREE 8 /* free pages only if memory pressure */
47 #define MADV_REMOVE 9 /* remove these pages & resources */
48 #define MADV_DONTFORK 10 /* don't inherit across fork */
49 #define MADV_DOFORK 11 /* do inherit across fork */
50 #define MADV_HWPOISON 100 /* poison a page for testing */
51 #define MADV_SOFT_OFFLINE 101 /* soft offline page for testing */
53 #define MADV_MERGEABLE 12 /* KSM may merge identical pages */
54 #define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages */
56 #define MADV_HUGEPAGE 14 /* Worth backing with hugepages */
57 #define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */
59 #define MADV_DONTDUMP 16 /* Explicity exclude from the core dump,
60 overrides the coredump filter bits */
61 #define MADV_DODUMP 17 /* Clear the MADV_DONTDUMP flag */
63 #define MADV_WIPEONFORK 18 /* Zero memory on fork, child only */
64 #define MADV_KEEPONFORK 19 /* Undo MADV_WIPEONFORK */
66 /* compatibility flags */
69 #define PKEY_DISABLE_ACCESS 0x1
70 #define PKEY_DISABLE_WRITE 0x2
71 #define PKEY_ACCESS_MASK (PKEY_DISABLE_ACCESS |\
74 #endif /* __ASM_GENERIC_MMAN_COMMON_H */