linux-headers (unknown)
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 */
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