include/uapi/linux/memfd.h

   1 #ifndef _UAPI_LINUX_MEMFD_H
   2 #define _UAPI_LINUX_MEMFD_H
   3
   4 #include <asm-generic/hugetlb_encode.h>
   5
   6 /* flags for memfd_create(2) (unsigned int) */
   7 #define MFD_CLOEXEC             0x0001U
   8 #define MFD_ALLOW_SEALING       0x0002U
   9 #define MFD_HUGETLB             0x0004U
  10
  11 /*
  12  * Huge page size encoding when MFD_HUGETLB is specified, and a huge page
  13  * size other than the default is desired.  See hugetlb_encode.h.
  14  * All known huge page size encodings are provided here.  It is the
  15  * responsibility of the application to know which sizes are supported on
  16  * the running system.  See mmap(2) man page for details.
  17  */
  18 #define MFD_HUGE_SHIFT  HUGETLB_FLAG_ENCODE_SHIFT
  19 #define MFD_HUGE_MASK   HUGETLB_FLAG_ENCODE_MASK
  20
  21 #define MFD_HUGE_64KB   HUGETLB_FLAG_ENCODE_64KB
  22 #define MFD_HUGE_512KB  HUGETLB_FLAG_ENCODE_512KB
  23 #define MFD_HUGE_1MB    HUGETLB_FLAG_ENCODE_1MB
  24 #define MFD_HUGE_2MB    HUGETLB_FLAG_ENCODE_2MB
  25 #define MFD_HUGE_8MB    HUGETLB_FLAG_ENCODE_8MB
  26 #define MFD_HUGE_16MB   HUGETLB_FLAG_ENCODE_16MB
  27 #define MFD_HUGE_256MB  HUGETLB_FLAG_ENCODE_256MB
  28 #define MFD_HUGE_1GB    HUGETLB_FLAG_ENCODE_1GB
  29 #define MFD_HUGE_2GB    HUGETLB_FLAG_ENCODE_2GB
  30 #define MFD_HUGE_16GB   HUGETLB_FLAG_ENCODE_16GB
  31
  32 #endif /* _UAPI_LINUX_MEMFD_H */