1#ifndef __ASM_GENERIC_MMAN_COMMON_H 2#define __ASM_GENERIC_MMAN_COMMON_H 3 4/* 5 Author: Michael S. Tsirkin <mst@mellanox.co.il>, Mellanox Technologies Ltd. 6 Based on: asm-xxx/mman.h 7*/ 8 9#define PROT_READ 0x1 /* page can be read */ 10#define PROT_WRITE 0x2 /* page can be written */ 11#define PROT_EXEC 0x4 /* page can be executed */ 12#define PROT_SEM 0x8 /* page may be used for atomic ops */ 13#define PROT_NONE 0x0 /* page can not be accessed */ 14#define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */ 15#define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end of growsup vma */ 16 17#define MAP_SHARED 0x01 /* Share changes */ 18#define MAP_PRIVATE 0x02 /* Changes are private */ 19#define MAP_SHARED_VALIDATE 0x03 /* share + validate extension flags */ 20#define MAP_TYPE 0x0f /* Mask for type of mapping */ 21#define MAP_FIXED 0x10 /* Interpret addr exactly */ 22#define MAP_ANONYMOUS 0x20 /* don't use a file */ 23#ifdef CONFIG_MMAP_ALLOW_UNINITIALIZED 24# define MAP_UNINITIALIZED 0x4000000 /* For anonymous mmap, memory could be uninitialized */ 25#else 26# define MAP_UNINITIALIZED 0x0 /* Don't support this flag */ 27#endif 28 29/* 30 * Flags for mlock 31 */ 32#define MLOCK_ONFAULT 0x01 /* Lock pages in range after they are faulted in, do not prefault */ 33 34#define MS_ASYNC 1 /* sync memory asynchronously */ 35#define MS_INVALIDATE 2 /* invalidate the caches */ 36#define MS_SYNC 4 /* synchronous memory sync */ 37 38#define MADV_NORMAL 0 /* no further special treatment */ 39#define MADV_RANDOM 1 /* expect random page references */ 40#define MADV_SEQUENTIAL 2 /* expect sequential page references */ 41#define MADV_WILLNEED 3 /* will need these pages */ 42#define MADV_DONTNEED 4 /* don't need these pages */ 43 44/* common parameters: try to keep these consistent across architectures */ 45#define MADV_FREE 8 /* free pages only if memory pressure */ 46#define MADV_REMOVE 9 /* remove these pages & resources */ 47#define MADV_DONTFORK 10 /* don't inherit across fork */ 48#define MADV_DOFORK 11 /* do inherit across fork */ 49#define MADV_HWPOISON 100 /* poison a page for testing */ 50#define MADV_SOFT_OFFLINE 101 /* soft offline page for testing */ 51 52#define MADV_MERGEABLE 12 /* KSM may merge identical pages */ 53#define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages */ 54 55#define MADV_HUGEPAGE 14 /* Worth backing with hugepages */ 56#define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */ 57 58#define MADV_DONTDUMP 16 /* Explicity exclude from the core dump, 59 overrides the coredump filter bits */ 60#define MADV_DODUMP 17 /* Clear the MADV_NODUMP flag */ 61 62#define MADV_WIPEONFORK 18 /* Zero memory on fork, child only */ 63#define MADV_KEEPONFORK 19 /* Undo MADV_WIPEONFORK */ 64 65/* compatibility flags */ 66#define MAP_FILE 0 67 68/* 69 * When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size. 70 * This gives us 6 bits, which is enough until someone invents 128 bit address 71 * spaces. 72 * 73 * Assume these are all power of twos. 74 * When 0 use the default page size. 75 */ 76#define MAP_HUGE_SHIFT 26 77#define MAP_HUGE_MASK 0x3f 78 79#define PKEY_DISABLE_ACCESS 0x1 80#define PKEY_DISABLE_WRITE 0x2 81#define PKEY_ACCESS_MASK (PKEY_DISABLE_ACCESS |\ 82 PKEY_DISABLE_WRITE) 83 84#endif /* __ASM_GENERIC_MMAN_COMMON_H */ 85