mman-common.h (3669B)
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/* compatibility flags */ 79#define MAP_FILE 0 80 81#define PKEY_DISABLE_ACCESS 0x1 82#define PKEY_DISABLE_WRITE 0x2 83#define PKEY_ACCESS_MASK (PKEY_DISABLE_ACCESS |\ 84 PKEY_DISABLE_WRITE) 85 86#endif /* __ASM_GENERIC_MMAN_COMMON_H */