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
12/*
13 * Huge page size encoding when MFD_HUGETLB is specified, and a huge page
14 * size other than the default is desired.  See hugetlb_encode.h.
15 * All known huge page size encodings are provided here.  It is the
16 * responsibility of the application to know which sizes are supported on
17 * the running system.  See mmap(2) man page for details.
18 */
19#define MFD_HUGE_SHIFT	HUGETLB_FLAG_ENCODE_SHIFT
20#define MFD_HUGE_MASK	HUGETLB_FLAG_ENCODE_MASK
21
22#define MFD_HUGE_64KB	HUGETLB_FLAG_ENCODE_64KB
23#define MFD_HUGE_512KB	HUGETLB_FLAG_ENCODE_512KB
24#define MFD_HUGE_1MB	HUGETLB_FLAG_ENCODE_1MB
25#define MFD_HUGE_2MB	HUGETLB_FLAG_ENCODE_2MB
26#define MFD_HUGE_8MB	HUGETLB_FLAG_ENCODE_8MB
27#define MFD_HUGE_16MB	HUGETLB_FLAG_ENCODE_16MB
28#define MFD_HUGE_256MB	HUGETLB_FLAG_ENCODE_256MB
29#define MFD_HUGE_1GB	HUGETLB_FLAG_ENCODE_1GB
30#define MFD_HUGE_2GB	HUGETLB_FLAG_ENCODE_2GB
31#define MFD_HUGE_16GB	HUGETLB_FLAG_ENCODE_16GB
32
33#endif /* _UAPI_LINUX_MEMFD_H */
34