/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

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/*

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* NUMA memory policies for Linux.

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* Copyright 2003,2004 Andi Kleen SuSE Labs

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*/

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#ifndef _LINUX_MEMPOLICY_H

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#define _LINUX_MEMPOLICY_H

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#include <linux/errno.h>

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/*

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* Both the MPOL_* mempolicy mode and the MPOL_F_* optional mode flags are

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* passed by the user to either set_mempolicy() or mbind() in an 'int' actual.

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* The MPOL_MODE_FLAGS macro determines the legal set of optional mode flags.

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*/

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/* Policies */

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enum {

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MPOL_DEFAULT,

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MPOL_PREFERRED,

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MPOL_BIND,

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MPOL_INTERLEAVE,

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MPOL_LOCAL,

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MPOL_PREFERRED_MANY,

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MPOL_MAX, /* always last member of enum */

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};

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/* Flags for set_mempolicy */

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#define MPOL_F_STATIC_NODES (1 << 15)

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#define MPOL_F_RELATIVE_NODES (1 << 14)

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#define MPOL_F_NUMA_BALANCING (1 << 13) /* Optimize with NUMA balancing if possible */

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/*

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* MPOL_MODE_FLAGS is the union of all possible optional mode flags passed to

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* either set_mempolicy() or mbind().

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*/

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#define MPOL_MODE_FLAGS \

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(MPOL_F_STATIC_NODES | MPOL_F_RELATIVE_NODES | MPOL_F_NUMA_BALANCING)

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/* Flags for get_mempolicy */

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#define MPOL_F_NODE (1<<0) /* return next IL mode instead of node mask */

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#define MPOL_F_ADDR (1<<1) /* look up vma using address */

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#define MPOL_F_MEMS_ALLOWED (1<<2) /* return allowed memories */

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/* Flags for mbind */

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#define MPOL_MF_STRICT (1<<0) /* Verify existing pages in the mapping */

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#define MPOL_MF_MOVE (1<<1) /* Move pages owned by this process to conform

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to policy */

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#define MPOL_MF_MOVE_ALL (1<<2) /* Move every page to conform to policy */

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#define MPOL_MF_LAZY (1<<3) /* Modifies '_MOVE: lazy migrate on fault */

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#define MPOL_MF_INTERNAL (1<<4) /* Internal flags start here */

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#define MPOL_MF_VALID (MPOL_MF_STRICT | \

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MPOL_MF_MOVE | \

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MPOL_MF_MOVE_ALL)

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/*

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* Internal flags that share the struct mempolicy flags word with

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* "mode flags". These flags are allocated from bit 0 up, as they

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* are never OR'ed into the mode in mempolicy API arguments.

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*/

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#define MPOL_F_SHARED (1 << 0) /* identify shared policies */

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#define MPOL_F_MOF (1 << 3) /* this policy wants migrate on fault */

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#define MPOL_F_MORON (1 << 4) /* Migrate On protnone Reference On Node */

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#endif /* _LINUX_MEMPOLICY_H */

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