linux-headers (unknown)
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 /* 0x10 reserved for arch-specific use */
15 /* 0x20 reserved for arch-specific use */
16 #define PROT_NONE 0x0 /* page can not be accessed */
17 #define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */
18 #define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end of growsup vma */
19
20 /* 0x01 - 0x03 are defined in linux/mman.h */
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
25 /* 0x0100 - 0x4000 flags are defined in asm-generic/mman.h */
26 #define MAP_POPULATE 0x008000 /* populate (prefault) pagetables */
27 #define MAP_NONBLOCK 0x010000 /* do not block on IO */
28 #define MAP_STACK 0x020000 /* give out an address that is best suited for process/thread stacks */
29 #define MAP_HUGETLB 0x040000 /* create a huge page mapping */
30 #define MAP_SYNC 0x080000 /* perform synchronous page faults for the mapping */
31 #define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED which doesn't unmap underlying mapping */
32
33 #define MAP_UNINITIALIZED 0x4000000 /* For anonymous mmap, memory could be
34 * uninitialized */
35
36 /*
37 * Flags for mlock
38 */
39 #define MLOCK_ONFAULT 0x01 /* Lock pages in range after they are faulted in, do not prefault */
40
41 #define MS_ASYNC 1 /* sync memory asynchronously */
42 #define MS_INVALIDATE 2 /* invalidate the caches */
43 #define MS_SYNC 4 /* synchronous memory sync */
44
45 #define MADV_NORMAL 0 /* no further special treatment */
46 #define MADV_RANDOM 1 /* expect random page references */
47 #define MADV_SEQUENTIAL 2 /* expect sequential page references */
48 #define MADV_WILLNEED 3 /* will need these pages */
49 #define MADV_DONTNEED 4 /* don't need these pages */
50
51 /* common parameters: try to keep these consistent across architectures */
52 #define MADV_FREE 8 /* free pages only if memory pressure */
53 #define MADV_REMOVE 9 /* remove these pages & resources */
54 #define MADV_DONTFORK 10 /* don't inherit across fork */
55 #define MADV_DOFORK 11 /* do inherit across fork */
56 #define MADV_HWPOISON 100 /* poison a page for testing */
57 #define MADV_SOFT_OFFLINE 101 /* soft offline page for testing */
58
59 #define MADV_MERGEABLE 12 /* KSM may merge identical pages */
60 #define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages */
61
62 #define MADV_HUGEPAGE 14 /* Worth backing with hugepages */
63 #define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */
64
65 #define MADV_DONTDUMP 16 /* Explicity exclude from the core dump,
66 overrides the coredump filter bits */
67 #define MADV_DODUMP 17 /* Clear the MADV_DONTDUMP flag */
68
69 #define MADV_WIPEONFORK 18 /* Zero memory on fork, child only */
70 #define MADV_KEEPONFORK 19 /* Undo MADV_WIPEONFORK */
71
72 #define MADV_COLD 20 /* deactivate these pages */
73 #define MADV_PAGEOUT 21 /* reclaim these pages */
74
75 #define MADV_POPULATE_READ 22 /* populate (prefault) page tables readable */
76 #define MADV_POPULATE_WRITE 23 /* populate (prefault) page tables writable */
77
78 #define MADV_DONTNEED_LOCKED 24 /* like DONTNEED, but drop locked pages too */
79
80 #define MADV_COLLAPSE 25 /* Synchronous hugepage collapse */
81
82 /* compatibility flags */
83 #define MAP_FILE 0
84
85 #define PKEY_DISABLE_ACCESS 0x1
86 #define PKEY_DISABLE_WRITE 0x2
87 #define PKEY_ACCESS_MASK (PKEY_DISABLE_ACCESS |\
88 PKEY_DISABLE_WRITE)
89
90 #endif /* __ASM_GENERIC_MMAN_COMMON_H */
Browse
Usage
Versions