linux/include/uapi/asm-generic/mman-common.h
<<
>>
Prefs
   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
  23/* 0x0100 - 0x4000 flags are defined in asm-generic/mman.h */
  24#define MAP_POPULATE            0x008000        /* populate (prefault) pagetables */
  25#define MAP_NONBLOCK            0x010000        /* do not block on IO */
  26#define MAP_STACK               0x020000        /* give out an address that is best suited for process/thread stacks */
  27#define MAP_HUGETLB             0x040000        /* create a huge page mapping */
  28#define MAP_SYNC                0x080000 /* perform synchronous page faults for the mapping */
  29#define MAP_FIXED_NOREPLACE     0x100000        /* MAP_FIXED which doesn't unmap underlying mapping */
  30
  31#define MAP_UNINITIALIZED 0x4000000     /* For anonymous mmap, memory could be
  32                                         * uninitialized */
  33
  34/*
  35 * Flags for mlock
  36 */
  37#define MLOCK_ONFAULT   0x01            /* Lock pages in range after they are faulted in, do not prefault */
  38
  39#define MS_ASYNC        1               /* sync memory asynchronously */
  40#define MS_INVALIDATE   2               /* invalidate the caches */
  41#define MS_SYNC         4               /* synchronous memory sync */
  42
  43#define MADV_NORMAL     0               /* no further special treatment */
  44#define MADV_RANDOM     1               /* expect random page references */
  45#define MADV_SEQUENTIAL 2               /* expect sequential page references */
  46#define MADV_WILLNEED   3               /* will need these pages */
  47#define MADV_DONTNEED   4               /* don't need these pages */
  48
  49/* common parameters: try to keep these consistent across architectures */
  50#define MADV_FREE       8               /* free pages only if memory pressure */
  51#define MADV_REMOVE     9               /* remove these pages & resources */
  52#define MADV_DONTFORK   10              /* don't inherit across fork */
  53#define MADV_DOFORK     11              /* do inherit across fork */
  54#define MADV_HWPOISON   100             /* poison a page for testing */
  55#define MADV_SOFT_OFFLINE 101           /* soft offline page for testing */
  56
  57#define MADV_MERGEABLE   12             /* KSM may merge identical pages */
  58#define MADV_UNMERGEABLE 13             /* KSM may not merge identical pages */
  59
  60#define MADV_HUGEPAGE   14              /* Worth backing with hugepages */
  61#define MADV_NOHUGEPAGE 15              /* Not worth backing with hugepages */
  62
  63#define MADV_DONTDUMP   16              /* Explicity exclude from the core dump,
  64                                           overrides the coredump filter bits */
  65#define MADV_DODUMP     17              /* Clear the MADV_DONTDUMP flag */
  66
  67#define MADV_WIPEONFORK 18              /* Zero memory on fork, child only */
  68#define MADV_KEEPONFORK 19              /* Undo MADV_WIPEONFORK */
  69
  70#define MADV_COLD       20              /* deactivate these pages */
  71#define MADV_PAGEOUT    21              /* reclaim these pages */
  72
  73/* compatibility flags */
  74#define MAP_FILE        0
  75
  76#define PKEY_DISABLE_ACCESS     0x1
  77#define PKEY_DISABLE_WRITE      0x2
  78#define PKEY_ACCESS_MASK        (PKEY_DISABLE_ACCESS |\
  79                                 PKEY_DISABLE_WRITE)
  80
  81#endif /* __ASM_GENERIC_MMAN_COMMON_H */
  82