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