1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 #ifndef _LINUX_MEMFD_H 3 #define _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 /* _LINUX_MEMFD_H */ 40