mman-common.h (3749B)
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 /* compatibility flags */ 81 #define MAP_FILE 0 82 83 #define PKEY_DISABLE_ACCESS 0x1 84 #define PKEY_DISABLE_WRITE 0x2 85 #define PKEY_ACCESS_MASK (PKEY_DISABLE_ACCESS |\ 86 PKEY_DISABLE_WRITE) 87 88 #endif /* __ASM_GENERIC_MMAN_COMMON_H */