xref: /openbmc/qemu/linux-headers/linux/memfd.h (revision c5c0fdbe)
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