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 */
40