1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 2#ifndef _LINUX_MMAN_H
 3#define _LINUX_MMAN_H
 4
 5#include <asm/mman.h>
 6#include <asm-generic/hugetlb_encode.h>
 7#include <linux/types.h>
 8
 9#define MREMAP_MAYMOVE		1
10#define MREMAP_FIXED		2
11#define MREMAP_DONTUNMAP	4
12
13#define OVERCOMMIT_GUESS		0
14#define OVERCOMMIT_ALWAYS		1
15#define OVERCOMMIT_NEVER		2
16
17#define MAP_SHARED	0x01		/* Share changes */
18#define MAP_PRIVATE	0x02		/* Changes are private */
19#define MAP_SHARED_VALIDATE 0x03	/* share + validate extension flags */
20#define MAP_DROPPABLE	0x08		/* Zero memory under memory pressure. */
21
22/*
23 * Huge page size encoding when MAP_HUGETLB is specified, and a huge page
24 * size other than the default is desired.  See hugetlb_encode.h.
25 * All known huge page size encodings are provided here.  It is the
26 * responsibility of the application to know which sizes are supported on
27 * the running system.  See mmap(2) man page for details.
28 */
29#define MAP_HUGE_SHIFT	HUGETLB_FLAG_ENCODE_SHIFT
30#define MAP_HUGE_MASK	HUGETLB_FLAG_ENCODE_MASK
31
32#define MAP_HUGE_16KB	HUGETLB_FLAG_ENCODE_16KB
33#define MAP_HUGE_64KB	HUGETLB_FLAG_ENCODE_64KB
34#define MAP_HUGE_512KB	HUGETLB_FLAG_ENCODE_512KB
35#define MAP_HUGE_1MB	HUGETLB_FLAG_ENCODE_1MB
36#define MAP_HUGE_2MB	HUGETLB_FLAG_ENCODE_2MB
37#define MAP_HUGE_8MB	HUGETLB_FLAG_ENCODE_8MB
38#define MAP_HUGE_16MB	HUGETLB_FLAG_ENCODE_16MB
39#define MAP_HUGE_32MB	HUGETLB_FLAG_ENCODE_32MB
40#define MAP_HUGE_256MB	HUGETLB_FLAG_ENCODE_256MB
41#define MAP_HUGE_512MB	HUGETLB_FLAG_ENCODE_512MB
42#define MAP_HUGE_1GB	HUGETLB_FLAG_ENCODE_1GB
43#define MAP_HUGE_2GB	HUGETLB_FLAG_ENCODE_2GB
44#define MAP_HUGE_16GB	HUGETLB_FLAG_ENCODE_16GB
45
46struct cachestat_range {
47	__u64 off;
48	__u64 len;
49};
50
51struct cachestat {
52	__u64 nr_cache;
53	__u64 nr_dirty;
54	__u64 nr_writeback;
55	__u64 nr_evicted;
56	__u64 nr_recently_evicted;
57};
58
59#endif /* _LINUX_MMAN_H */