include/uapi/linux/memfd.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 #ifndef _UAPI_LINUX_MEMFD_H
   3 #define _UAPI_LINUX_MEMFD_H
   4
   5 #include <asm-generic/hugetlb_encode.h>
   6
   7 /* flags for memfd_create(2) (unsigned int) */
   8 #define MFD_CLOEXEC             0x0001U
   9 #define MFD_ALLOW_SEALING       0x0002U
  10 #define MFD_HUGETLB             0x0004U
  11 /* not executable and sealed to prevent changing to executable. */
  12 #define MFD_NOEXEC_SEAL         0x0008U
  13 /* executable */
  14 #define MFD_EXEC                0x0010U
  15
  16 /*
  17  * Huge page size encoding when MFD_HUGETLB is specified, and a huge page
  18  * size other than the default is desired.  See hugetlb_encode.h.
  19  * All known huge page size encodings are provided here.  It is the
  20  * responsibility of the application to know which sizes are supported on
  21  * the running system.  See mmap(2) man page for details.
  22  */
  23 #define MFD_HUGE_SHIFT  HUGETLB_FLAG_ENCODE_SHIFT
  24 #define MFD_HUGE_MASK   HUGETLB_FLAG_ENCODE_MASK
  25
  26 #define MFD_HUGE_64KB   HUGETLB_FLAG_ENCODE_64KB
  27 #define MFD_HUGE_512KB  HUGETLB_FLAG_ENCODE_512KB
  28 #define MFD_HUGE_1MB    HUGETLB_FLAG_ENCODE_1MB
  29 #define MFD_HUGE_2MB    HUGETLB_FLAG_ENCODE_2MB
  30 #define MFD_HUGE_8MB    HUGETLB_FLAG_ENCODE_8MB
  31 #define MFD_HUGE_16MB   HUGETLB_FLAG_ENCODE_16MB
  32 #define MFD_HUGE_32MB   HUGETLB_FLAG_ENCODE_32MB
  33 #define MFD_HUGE_256MB  HUGETLB_FLAG_ENCODE_256MB
  34 #define MFD_HUGE_512MB  HUGETLB_FLAG_ENCODE_512MB
  35 #define MFD_HUGE_1GB    HUGETLB_FLAG_ENCODE_1GB
  36 #define MFD_HUGE_2GB    HUGETLB_FLAG_ENCODE_2GB
  37 #define MFD_HUGE_16GB   HUGETLB_FLAG_ENCODE_16GB
  38
  39 #endif /* _UAPI_LINUX_MEMFD_H */