projects / thirdparty / qemu.git / blame
| Commit | Line | Data |
|---|---|---|
| 8cf108c5 ZY |
1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
| 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 | */ | |
| d9cb4336 | 30 | /* 0x01 - 0x03 are defined in linux/mman.h */ |
| 8cf108c5 ZY |
31 | #define MAP_TYPE 0x00f /* Mask for type of mapping */ |
| 32 | #define MAP_FIXED 0x010 /* Interpret addr exactly */ | |
| 33 | ||
| 34 | /* not used by linux, but here to make sure we don't clash with ABI defines */ | |
| 35 | #define MAP_RENAME 0x020 /* Assign page to file */ | |
| 36 | #define MAP_AUTOGROW 0x040 /* File may grow by writing */ | |
| 37 | #define MAP_LOCAL 0x080 /* Copy on fork/sproc */ | |
| 38 | #define MAP_AUTORSRV 0x100 /* Logical swap reserved on demand */ | |
| 39 | ||
| 40 | /* These are linux-specific */ | |
| 41 | #define MAP_NORESERVE 0x0400 /* don't check for reservations */ | |
| 42 | #define MAP_ANONYMOUS 0x0800 /* don't use a file */ | |
| 43 | #define MAP_GROWSDOWN 0x1000 /* stack-like segment */ | |
| 44 | #define MAP_DENYWRITE 0x2000 /* ETXTBSY */ | |
| 45 | #define MAP_EXECUTABLE 0x4000 /* mark it as an executable */ | |
| 46 | #define MAP_LOCKED 0x8000 /* pages are locked */ | |
| 47 | #define MAP_POPULATE 0x10000 /* populate (prefault) pagetables */ | |
| 48 | #define MAP_NONBLOCK 0x20000 /* do not block on IO */ | |
| 49 | #define MAP_STACK 0x40000 /* give out an address that is best suited for process/thread stacks */ | |
| 50 | #define MAP_HUGETLB 0x80000 /* create a huge page mapping */ | |
| 51 | #define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED which doesn't unmap underlying mapping */ | |
| 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 */ | |
| 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 */ | |
| 71 | ||
| 72 | #define MADV_NORMAL 0 /* no further special treatment */ | |
| 73 | #define MADV_RANDOM 1 /* expect random page references */ | |
| 74 | #define MADV_SEQUENTIAL 2 /* expect sequential page references */ | |
| 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 */ | |
| 79 | #define MADV_FREE 8 /* free pages only if memory pressure */ | |
| 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 */ | |
| 83 | ||
| 84 | #define MADV_MERGEABLE 12 /* KSM may merge identical pages */ | |
| 85 | #define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages */ | |
| 86 | #define MADV_HWPOISON 100 /* poison a page for testing */ | |
| 87 | ||
| 88 | #define MADV_HUGEPAGE 14 /* Worth backing with hugepages */ | |
| 89 | #define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */ | |
| 90 | ||
| 91 | #define MADV_DONTDUMP 16 /* Explicity exclude from the core dump, | |
| 92 | overrides the coredump filter bits */ | |
| 93 | #define MADV_DODUMP 17 /* Clear the MADV_NODUMP flag */ | |
| 94 | ||
| 95 | #define MADV_WIPEONFORK 18 /* Zero memory on fork, child only */ | |
| 96 | #define MADV_KEEPONFORK 19 /* Undo MADV_WIPEONFORK */ | |
| 97 | ||
| f363d039 EA |
98 | #define MADV_COLD 20 /* deactivate these pages */ |
| 99 | #define MADV_PAGEOUT 21 /* reclaim these pages */ | |
| 100 | ||
| 327d4b7f BR |
101 | #define MADV_POPULATE_READ 22 /* populate (prefault) page tables readable */ |
| 102 | #define MADV_POPULATE_WRITE 23 /* populate (prefault) page tables writable */ | |
| 103 | ||
| 8cf108c5 ZY |
104 | /* compatibility flags */ |
| 105 | #define MAP_FILE 0 | |
| 106 | ||
| 107 | #define PKEY_DISABLE_ACCESS 0x1 | |
| 108 | #define PKEY_DISABLE_WRITE 0x2 | |
| 109 | #define PKEY_ACCESS_MASK (PKEY_DISABLE_ACCESS |\ | |
| 110 | PKEY_DISABLE_WRITE) | |
| 111 | ||
| 112 | #endif /* _ASM_MMAN_H */ |