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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 <[email protected]>, 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#define MADV_GUARD_INSTALL 102 /* fatal signal on access to range */
83#define MADV_GUARD_REMOVE 103 /* unguard range */
84
85/* compatibility flags */
86#define MAP_FILE 0
87
88#define PKEY_UNRESTRICTED 0x0
89#define PKEY_DISABLE_ACCESS 0x1
90#define PKEY_DISABLE_WRITE 0x2
91#define PKEY_ACCESS_MASK (PKEY_DISABLE_ACCESS |\
92 PKEY_DISABLE_WRITE)
93
94#endif /* __ASM_GENERIC_MMAN_COMMON_H */