1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _UAPI_LINUX_MMAN_H
3 #define _UAPI_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
46 struct cachestat_range {
47 __u64 off;
48 __u64 len;
49 };
50
51 struct 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 /* _UAPI_LINUX_MMAN_H */
60
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