include/qemu/mmap-alloc.h

   1 #ifndef QEMU_MMAP_ALLOC_H
   2 #define QEMU_MMAP_ALLOC_H
   3
   4
   5 size_t qemu_fd_getpagesize(int fd);
   6
   7 size_t qemu_mempath_getpagesize(const char *mem_path);
   8
   9 /**
  10  * qemu_ram_mmap: mmap anonymous memory, the specified file or device.
  11  *
  12  * mmap() abstraction to map guest RAM, simplifying flag handling, taking
  13  * care of alignment requirements and installing guard pages.
  14  *
  15  * Parameters:
  16  *  @fd: the file or the device to mmap
  17  *  @size: the number of bytes to be mmaped
  18  *  @align: if not zero, specify the alignment of the starting mapping address;
  19  *          otherwise, the alignment in use will be determined by QEMU.
  20  *  @qemu_map_flags: QEMU_MAP_* flags
  21  *  @map_offset: map starts at offset of map_offset from the start of fd
  22  *
  23  * Internally, MAP_PRIVATE, MAP_ANONYMOUS and MAP_SHARED_VALIDATE are set
  24  * implicitly based on other parameters.
  25  *
  26  * Return:
  27  *  On success, return a pointer to the mapped area.
  28  *  On failure, return MAP_FAILED.
  29  */
  30 void *qemu_ram_mmap(int fd,
  31                     size_t size,
  32                     size_t align,
  33                     uint32_t qemu_map_flags,
  34                     off_t map_offset);
  35
  36 void qemu_ram_munmap(int fd, void *ptr, size_t size);
  37
  38 #endif