| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 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_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 | /* |
| 29 | * Flags for mlock |
| 30 | */ |
| 31 | #define MLOCK_ONFAULT 0x01 /* Lock pages in range after they are faulted in, do not prefault */ |
| 32 | |
| 33 | #define MS_ASYNC 1 /* sync memory asynchronously */ |
| 34 | #define MS_INVALIDATE 2 /* invalidate the caches */ |
| 35 | #define MS_SYNC 4 /* synchronous memory sync */ |
| 36 | |
| 37 | #define MADV_NORMAL 0 /* no further special treatment */ |
| 38 | #define MADV_RANDOM 1 /* expect random page references */ |
| 39 | #define MADV_SEQUENTIAL 2 /* expect sequential page references */ |
| 40 | #define MADV_WILLNEED 3 /* will need these pages */ |
| 41 | #define MADV_DONTNEED 4 /* don't need these pages */ |
| 42 | |
| 43 | /* common parameters: try to keep these consistent across architectures */ |
| 44 | #define MADV_REMOVE 9 /* remove these pages & resources */ |
| 45 | #define MADV_DONTFORK 10 /* don't inherit across fork */ |
| 46 | #define MADV_DOFORK 11 /* do inherit across fork */ |
| 47 | #define MADV_HWPOISON 100 /* poison a page for testing */ |
| 48 | #define MADV_SOFT_OFFLINE 101 /* soft offline page for testing */ |
| 49 | |
| 50 | #define MADV_MERGEABLE 12 /* KSM may merge identical pages */ |
| 51 | #define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages */ |
| 52 | |
| 53 | #define MADV_HUGEPAGE 14 /* Worth backing with hugepages */ |
| 54 | #define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */ |
| 55 | |
| 56 | #define MADV_DONTDUMP 16 /* Explicity exclude from the core dump, |
| 57 | overrides the coredump filter bits */ |
| 58 | #define MADV_DODUMP 17 /* Clear the MADV_DONTDUMP flag */ |
| 59 | |
| 60 | /* compatibility flags */ |
| 61 | #define MAP_FILE 0 |
| 62 | |
| 63 | /* |
| 64 | * When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size. |
| 65 | * This gives us 6 bits, which is enough until someone invents 128 bit address |
| 66 | * spaces. |
| 67 | * |
| 68 | * Assume these are all power of twos. |
| 69 | * When 0 use the default page size. |
| 70 | */ |
| 71 | #define MAP_HUGE_SHIFT 26 |
| 72 | #define MAP_HUGE_MASK 0x3f |
| 73 | |
| 74 | #endif /* __ASM_GENERIC_MMAN_COMMON_H */ |