include/uapi/asm-generic/mman-common.h

   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_FREE       8               /* free pages only if memory pressure */
  45 #define MADV_REMOVE     9               /* remove these pages & resources */
  46 #define MADV_DONTFORK   10              /* don't inherit across fork */
  47 #define MADV_DOFORK     11              /* do inherit across fork */
  48 #define MADV_HWPOISON   100             /* poison a page for testing */
  49 #define MADV_SOFT_OFFLINE 101           /* soft offline page for testing */
  50
  51 #define MADV_MERGEABLE   12             /* KSM may merge identical pages */
  52 #define MADV_UNMERGEABLE 13             /* KSM may not merge identical pages */
  53
  54 #define MADV_HUGEPAGE   14              /* Worth backing with hugepages */
  55 #define MADV_NOHUGEPAGE 15              /* Not worth backing with hugepages */
  56
  57 #define MADV_DONTDUMP   16              /* Explicity exclude from the core dump,
  58                                            overrides the coredump filter bits */
  59 #define MADV_DODUMP     17              /* Clear the MADV_DONTDUMP flag */
  60
  61 /* compatibility flags */
  62 #define MAP_FILE        0
  63
  64 /*
  65  * When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size.
  66  * This gives us 6 bits, which is enough until someone invents 128 bit address
  67  * spaces.
  68  *
  69  * Assume these are all power of twos.
  70  * When 0 use the default page size.
  71  */
  72 #define MAP_HUGE_SHIFT  26
  73 #define MAP_HUGE_MASK   0x3f
  74
  75 #define PKEY_DISABLE_ACCESS     0x1
  76 #define PKEY_DISABLE_WRITE      0x2
  77 #define PKEY_ACCESS_MASK        (PKEY_DISABLE_ACCESS |\
  78                                  PKEY_DISABLE_WRITE)
  79
  80 #endif /* __ASM_GENERIC_MMAN_COMMON_H */