Greg Kroah-Hartman | e2be04c | 2017-11-01 15:09:13 +0100 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
| 3 | * This file is subject to the terms and conditions of the GNU General Public |
| 4 | * License. See the file "COPYING" in the main directory of this archive |
| 5 | * for more details. |
| 6 | * |
| 7 | * Copyright (C) 1995, 1999, 2002 by Ralf Baechle |
| 8 | */ |
| 9 | #ifndef _ASM_MMAN_H |
| 10 | #define _ASM_MMAN_H |
| 11 | |
| 12 | /* |
| 13 | * Protections are chosen from these bits, OR'd together. The |
| 14 | * implementation does not necessarily support PROT_EXEC or PROT_WRITE |
| 15 | * without PROT_READ. The only guarantees are that no writing will be |
| 16 | * allowed without PROT_WRITE and no access will be allowed for PROT_NONE. |
| 17 | */ |
| 18 | #define PROT_NONE 0x00 /* page can not be accessed */ |
| 19 | #define PROT_READ 0x01 /* page can be read */ |
| 20 | #define PROT_WRITE 0x02 /* page can be written */ |
| 21 | #define PROT_EXEC 0x04 /* page can be executed */ |
| 22 | /* 0x08 reserved for PROT_EXEC_NOFLUSH */ |
| 23 | #define PROT_SEM 0x10 /* page may be used for atomic ops */ |
| 24 | #define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */ |
| 25 | #define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end of growsup vma */ |
| 26 | |
| 27 | /* |
| 28 | * Flags for mmap |
| 29 | */ |
| 30 | #define MAP_SHARED 0x001 /* Share changes */ |
| 31 | #define MAP_PRIVATE 0x002 /* Changes are private */ |
| 32 | #define MAP_TYPE 0x00f /* Mask for type of mapping */ |
| 33 | #define MAP_FIXED 0x010 /* Interpret addr exactly */ |
| 34 | |
| 35 | /* not used by linux, but here to make sure we don't clash with ABI defines */ |
| 36 | #define MAP_RENAME 0x020 /* Assign page to file */ |
| 37 | #define MAP_AUTOGROW 0x040 /* File may grow by writing */ |
| 38 | #define MAP_LOCAL 0x080 /* Copy on fork/sproc */ |
| 39 | #define MAP_AUTORSRV 0x100 /* Logical swap reserved on demand */ |
| 40 | |
| 41 | /* These are linux-specific */ |
| 42 | #define MAP_NORESERVE 0x0400 /* don't check for reservations */ |
| 43 | #define MAP_ANONYMOUS 0x0800 /* don't use a file */ |
| 44 | #define MAP_GROWSDOWN 0x1000 /* stack-like segment */ |
| 45 | #define MAP_DENYWRITE 0x2000 /* ETXTBSY */ |
| 46 | #define MAP_EXECUTABLE 0x4000 /* mark it as an executable */ |
| 47 | #define MAP_LOCKED 0x8000 /* pages are locked */ |
| 48 | #define MAP_POPULATE 0x10000 /* populate (prefault) pagetables */ |
| 49 | #define MAP_NONBLOCK 0x20000 /* do not block on IO */ |
Arnd Bergmann | 90f72aa | 2009-09-21 17:03:45 -0700 | [diff] [blame] | 50 | #define MAP_STACK 0x40000 /* give out an address that is best suited for process/thread stacks */ |
| 51 | #define MAP_HUGETLB 0x80000 /* create a huge page mapping */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
| 53 | /* |
| 54 | * Flags for msync |
| 55 | */ |
| 56 | #define MS_ASYNC 0x0001 /* sync memory asynchronously */ |
| 57 | #define MS_INVALIDATE 0x0002 /* invalidate mappings & caches */ |
| 58 | #define MS_SYNC 0x0004 /* synchronous memory sync */ |
| 59 | |
| 60 | /* |
| 61 | * Flags for mlockall |
| 62 | */ |
| 63 | #define MCL_CURRENT 1 /* lock all current mappings */ |
| 64 | #define MCL_FUTURE 2 /* lock all future mappings */ |
Eric B Munson | b0f205c | 2015-11-05 18:51:39 -0800 | [diff] [blame] | 65 | #define MCL_ONFAULT 4 /* lock all pages that are faulted in */ |
| 66 | |
| 67 | /* |
| 68 | * Flags for mlock |
| 69 | */ |
| 70 | #define MLOCK_ONFAULT 0x01 /* Lock pages in range after they are faulted in, do not prefault */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | |
Michael S. Tsirkin | 5f6164f | 2006-02-15 15:17:39 -0800 | [diff] [blame] | 72 | #define MADV_NORMAL 0 /* no further special treatment */ |
| 73 | #define MADV_RANDOM 1 /* expect random page references */ |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 74 | #define MADV_SEQUENTIAL 2 /* expect sequential page references */ |
Michael S. Tsirkin | 5f6164f | 2006-02-15 15:17:39 -0800 | [diff] [blame] | 75 | #define MADV_WILLNEED 3 /* will need these pages */ |
| 76 | #define MADV_DONTNEED 4 /* don't need these pages */ |
| 77 | |
| 78 | /* common parameters: try to keep these consistent across architectures */ |
Chen Gang | 21f55b0 | 2016-01-15 16:55:02 -0800 | [diff] [blame] | 79 | #define MADV_FREE 8 /* free pages only if memory pressure */ |
Michael S. Tsirkin | 5f6164f | 2006-02-15 15:17:39 -0800 | [diff] [blame] | 80 | #define MADV_REMOVE 9 /* remove these pages & resources */ |
| 81 | #define MADV_DONTFORK 10 /* don't inherit across fork */ |
| 82 | #define MADV_DOFORK 11 /* do inherit across fork */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 84 | #define MADV_MERGEABLE 12 /* KSM may merge identical pages */ |
Hugh Dickins | d19f352 | 2009-09-21 17:01:53 -0700 | [diff] [blame] | 85 | #define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages */ |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 86 | #define MADV_HWPOISON 100 /* poison a page for testing */ |
Hugh Dickins | d19f352 | 2009-09-21 17:01:53 -0700 | [diff] [blame] | 87 | |
Andrea Arcangeli | a826e42 | 2011-01-13 15:46:31 -0800 | [diff] [blame] | 88 | #define MADV_HUGEPAGE 14 /* Worth backing with hugepages */ |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 89 | #define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */ |
Andrea Arcangeli | a826e42 | 2011-01-13 15:46:31 -0800 | [diff] [blame] | 90 | |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 91 | #define MADV_DONTDUMP 16 /* Explicity exclude from the core dump, |
Jason Baron | accb61f | 2012-03-23 15:02:51 -0700 | [diff] [blame] | 92 | overrides the coredump filter bits */ |
| 93 | #define MADV_DODUMP 17 /* Clear the MADV_NODUMP flag */ |
| 94 | |
Rik van Riel | d2cd9ed | 2017-09-06 16:25:15 -0700 | [diff] [blame] | 95 | #define MADV_WIPEONFORK 18 /* Zero memory on fork, child only */ |
| 96 | #define MADV_KEEPONFORK 19 /* Undo MADV_WIPEONFORK */ |
| 97 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | /* compatibility flags */ |
Michael S. Tsirkin | 5f6164f | 2006-02-15 15:17:39 -0800 | [diff] [blame] | 99 | #define MAP_FILE 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | |
Dave Hansen | e8c24d3 | 2016-07-29 09:30:15 -0700 | [diff] [blame] | 101 | #define PKEY_DISABLE_ACCESS 0x1 |
| 102 | #define PKEY_DISABLE_WRITE 0x2 |
| 103 | #define PKEY_ACCESS_MASK (PKEY_DISABLE_ACCESS |\ |
| 104 | PKEY_DISABLE_WRITE) |
| 105 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | #endif /* _ASM_MMAN_H */ |