LXR linux/tools/testing/selftests/kvm/include/numaif.h

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * tools/testing/selftests/kvm/include/numaif.h
   4 *
   5 * Copyright (C) 2020, Google LLC.
   6 *
   7 * This work is licensed under the terms of the GNU GPL, version 2.
   8 *
   9 * Header file that provides access to NUMA API functions not explicitly
  10 * exported to user space.
  11 */
  12
  13#ifndef SELFTEST_KVM_NUMAIF_H
  14#define SELFTEST_KVM_NUMAIF_H
  15
  16#define __NR_get_mempolicy 239
  17#define __NR_migrate_pages 256
  18
  19/* System calls */
  20long get_mempolicy(int *policy, const unsigned long *nmask,
  21                   unsigned long maxnode, void *addr, int flags)
  22{
  23        return syscall(__NR_get_mempolicy, policy, nmask,
  24                       maxnode, addr, flags);
  25}
  26
  27long migrate_pages(int pid, unsigned long maxnode,
  28                   const unsigned long *frommask,
  29                   const unsigned long *tomask)
  30{
  31        return syscall(__NR_migrate_pages, pid, maxnode, frommask, tomask);
  32}
  33
  34/* Policies */
  35#define MPOL_DEFAULT     0
  36#define MPOL_PREFERRED   1
  37#define MPOL_BIND        2
  38#define MPOL_INTERLEAVE  3
  39
  40#define MPOL_MAX MPOL_INTERLEAVE
  41
  42/* Flags for get_mem_policy */
  43#define MPOL_F_NODE         (1<<0)  /* return next il node or node of address */
  44                                    /* Warning: MPOL_F_NODE is unsupported and
  45                                     * subject to change. Don't use.
  46                                     */
  47#define MPOL_F_ADDR         (1<<1)  /* look up vma using address */
  48#define MPOL_F_MEMS_ALLOWED (1<<2)  /* query nodes allowed in cpuset */
  49
  50/* Flags for mbind */
  51#define MPOL_MF_STRICT       (1<<0) /* Verify existing pages in the mapping */
  52#define MPOL_MF_MOVE         (1<<1) /* Move pages owned by this process to conform to mapping */
  53#define MPOL_MF_MOVE_ALL     (1<<2) /* Move every page to conform to mapping */
  54
  55#endif /* SELFTEST_KVM_NUMAIF_H */
  56