1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 /*
3 * NUMA memory policies for Linux.
4 * Copyright 2003,2004 Andi Kleen SuSE Labs
5 */
6 #ifndef _UAPI_LINUX_MEMPOLICY_H
7 #define _UAPI_LINUX_MEMPOLICY_H
8
9 #include <linux/errno.h>
10
11
12 /*
13 * Both the MPOL_* mempolicy mode and the MPOL_F_* optional mode flags are
14 * passed by the user to either set_mempolicy() or mbind() in an 'int' actual.
15 * The MPOL_MODE_FLAGS macro determines the legal set of optional mode flags.
16 */
17
18 /* Policies */
19 enum {
20 MPOL_DEFAULT,
21 MPOL_PREFERRED,
22 MPOL_BIND,
23 MPOL_INTERLEAVE,
24 MPOL_LOCAL,
25 MPOL_MAX, /* always last member of enum */
26 };
27
28 /* Flags for set_mempolicy */
29 #define MPOL_F_STATIC_NODES (1 << 15)
30 #define MPOL_F_RELATIVE_NODES (1 << 14)
31
32 /*
33 * MPOL_MODE_FLAGS is the union of all possible optional mode flags passed to
34 * either set_mempolicy() or mbind().
35 */
36 #define MPOL_MODE_FLAGS (MPOL_F_STATIC_NODES | MPOL_F_RELATIVE_NODES)
37
38 /* Flags for get_mempolicy */
39 #define MPOL_F_NODE (1<<0) /* return next IL mode instead of node mask */
40 #define MPOL_F_ADDR (1<<1) /* look up vma using address */
41 #define MPOL_F_MEMS_ALLOWED (1<<2) /* return allowed memories */
42
43 /* Flags for mbind */
44 #define MPOL_MF_STRICT (1<<0) /* Verify existing pages in the mapping */
45 #define MPOL_MF_MOVE (1<<1) /* Move pages owned by this process to conform
46 to policy */
47 #define MPOL_MF_MOVE_ALL (1<<2) /* Move every page to conform to policy */
48 #define MPOL_MF_LAZY (1<<3) /* Modifies '_MOVE: lazy migrate on fault */
49 #define MPOL_MF_INTERNAL (1<<4) /* Internal flags start here */
50
51 #define MPOL_MF_VALID (MPOL_MF_STRICT | \
52 MPOL_MF_MOVE | \
53 MPOL_MF_MOVE_ALL)
54
55 /*
56 * Internal flags that share the struct mempolicy flags word with
57 * "mode flags". These flags are allocated from bit 0 up, as they
58 * are never OR'ed into the mode in mempolicy API arguments.
59 */
60 #define MPOL_F_SHARED (1 << 0) /* identify shared policies */
61 #define MPOL_F_LOCAL (1 << 1) /* preferred local allocation */
62 #define MPOL_F_MOF (1 << 3) /* this policy wants migrate on fault */
63 #define MPOL_F_MORON (1 << 4) /* Migrate On protnone Reference On Node */
64
65
66 #endif /* _UAPI_LINUX_MEMPOLICY_H */