uapi/linux/memfd.h

0001 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
0002 #ifndef _UAPI_LINUX_MEMFD_H
0003 #define _UAPI_LINUX_MEMFD_H
0004
0005 #include <asm-generic/hugetlb_encode.h>
0006
0007 /* flags for memfd_create(2) (unsigned int) */
0008 #define MFD_CLOEXEC     0x0001U
0009 #define MFD_ALLOW_SEALING   0x0002U
0010 #define MFD_HUGETLB     0x0004U
0011
0012 /*
0013  * Huge page size encoding when MFD_HUGETLB is specified, and a huge page
0014  * size other than the default is desired.  See hugetlb_encode.h.
0015  * All known huge page size encodings are provided here.  It is the
0016  * responsibility of the application to know which sizes are supported on
0017  * the running system.  See mmap(2) man page for details.
0018  */
0019 #define MFD_HUGE_SHIFT  HUGETLB_FLAG_ENCODE_SHIFT
0020 #define MFD_HUGE_MASK   HUGETLB_FLAG_ENCODE_MASK
0021
0022 #define MFD_HUGE_64KB   HUGETLB_FLAG_ENCODE_64KB
0023 #define MFD_HUGE_512KB  HUGETLB_FLAG_ENCODE_512KB
0024 #define MFD_HUGE_1MB    HUGETLB_FLAG_ENCODE_1MB
0025 #define MFD_HUGE_2MB    HUGETLB_FLAG_ENCODE_2MB
0026 #define MFD_HUGE_8MB    HUGETLB_FLAG_ENCODE_8MB
0027 #define MFD_HUGE_16MB   HUGETLB_FLAG_ENCODE_16MB
0028 #define MFD_HUGE_32MB   HUGETLB_FLAG_ENCODE_32MB
0029 #define MFD_HUGE_256MB  HUGETLB_FLAG_ENCODE_256MB
0030 #define MFD_HUGE_512MB  HUGETLB_FLAG_ENCODE_512MB
0031 #define MFD_HUGE_1GB    HUGETLB_FLAG_ENCODE_1GB
0032 #define MFD_HUGE_2GB    HUGETLB_FLAG_ENCODE_2GB
0033 #define MFD_HUGE_16GB   HUGETLB_FLAG_ENCODE_16GB
0034
0035 #endif /* _UAPI_LINUX_MEMFD_H */