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