1/*
2 * NUMA memory policies for Linux.
3 * Copyright 2003,2004 Andi Kleen SuSE Labs
4 */
5#ifndef _UAPI_LINUX_MEMPOLICY_H
6#define _UAPI_LINUX_MEMPOLICY_H
7
8#include <linux/errno.h>
9
10
11/*
12 * Both the MPOL_* mempolicy mode and the MPOL_F_* optional mode flags are
13 * passed by the user to either set_mempolicy() or mbind() in an 'int' actual.
14 * The MPOL_MODE_FLAGS macro determines the legal set of optional mode flags.
15 */
16
17/* Policies */
18enum {
19	MPOL_DEFAULT,
20	MPOL_PREFERRED,
21	MPOL_BIND,
22	MPOL_INTERLEAVE,
23	MPOL_LOCAL,
24	MPOL_MAX,	/* always last member of enum */
25};
26
27enum mpol_rebind_step {
28	MPOL_REBIND_ONCE,	/* do rebind work at once(not by two step) */
29	MPOL_REBIND_STEP1,	/* first step(set all the newly nodes) */
30	MPOL_REBIND_STEP2,	/* second step(clean all the disallowed nodes)*/
31	MPOL_REBIND_NSTEP,
32};
33
34/* Flags for set_mempolicy */
35#define MPOL_F_STATIC_NODES	(1 << 15)
36#define MPOL_F_RELATIVE_NODES	(1 << 14)
37
38/*
39 * MPOL_MODE_FLAGS is the union of all possible optional mode flags passed to
40 * either set_mempolicy() or mbind().
41 */
42#define MPOL_MODE_FLAGS	(MPOL_F_STATIC_NODES | MPOL_F_RELATIVE_NODES)
43
44/* Flags for get_mempolicy */
45#define MPOL_F_NODE	(1<<0)	/* return next IL mode instead of node mask */
46#define MPOL_F_ADDR	(1<<1)	/* look up vma using address */
47#define MPOL_F_MEMS_ALLOWED (1<<2) /* return allowed memories */
48
49/* Flags for mbind */
50#define MPOL_MF_STRICT	(1<<0)	/* Verify existing pages in the mapping */
51#define MPOL_MF_MOVE	 (1<<1)	/* Move pages owned by this process to conform
52				   to policy */
53#define MPOL_MF_MOVE_ALL (1<<2)	/* Move every page to conform to policy */
54#define MPOL_MF_LAZY	 (1<<3)	/* Modifies '_MOVE:  lazy migrate on fault */
55#define MPOL_MF_INTERNAL (1<<4)	/* Internal flags start here */
56
57#define MPOL_MF_VALID	(MPOL_MF_STRICT   | 	\
58			 MPOL_MF_MOVE     | 	\
59			 MPOL_MF_MOVE_ALL)
60
61/*
62 * Internal flags that share the struct mempolicy flags word with
63 * "mode flags".  These flags are allocated from bit 0 up, as they
64 * are never OR'ed into the mode in mempolicy API arguments.
65 */
66#define MPOL_F_SHARED  (1 << 0)	/* identify shared policies */
67#define MPOL_F_LOCAL   (1 << 1)	/* preferred local allocation */
68#define MPOL_F_REBINDING (1 << 2)	/* identify policies in rebinding */
69#define MPOL_F_MOF	(1 << 3) /* this policy wants migrate on fault */
70#define MPOL_F_MORON	(1 << 4) /* Migrate On pte_numa Reference On Node */
71
72
73#endif /* _UAPI_LINUX_MEMPOLICY_H */
74