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 */