4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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14 * in the LICENSE file that accompanied this code).
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24 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
26 * Copyright (c) 2012, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
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32 * libcfs/include/libcfs/linux/linux-mem.h
34 * Basic library routines.
36 * Author: liang@whamcloud.com
39 #ifndef __LIBCFS_LINUX_CPU_H__
40 #define __LIBCFS_LINUX_CPU_H__
42 #include <linux/cpu.h>
43 #include <linux/cpuset.h>
44 #include <linux/topology.h>
45 #include <linux/version.h>
49 #define HAVE_LIBCFS_CPT
51 /** virtual processing unit */
52 struct cfs_cpu_partition {
53 /* CPUs mask for this partition */
54 cpumask_t *cpt_cpumask;
55 /* nodes mask for this partition */
56 nodemask_t *cpt_nodemask;
57 /* NUMA distance between CPTs */
58 unsigned *cpt_distance;
59 /* spread rotor for NUMA allocator */
61 /* NUMA node if cpt_nodemask is empty */
65 /** descriptor for CPU partitions */
66 struct cfs_cpt_table {
67 /* spread rotor for NUMA allocator */
69 /* maximum NUMA distance between all nodes in table */
70 unsigned ctb_distance;
71 /* # of CPU partitions */
73 /* partitions tables */
74 struct cfs_cpu_partition *ctb_parts;
75 /* shadow HW CPU to CPU partition ID */
77 /* all cpus in this partition table */
78 cpumask_t *ctb_cpumask;
79 /* shadow HW node to CPU partition ID */
81 /* all nodes in this partition table */
82 nodemask_t *ctb_nodemask;
85 void cfs_cpu_core_siblings(int cpu, cpumask_t *mask);
87 #endif /* CONFIG_SMP */
89 #ifndef HAVE_TOPOLOGY_SIBLING_CPUMASK
90 # define topology_sibling_cpumask(cpu) topology_thread_cpumask(cpu)
91 #endif /* HAVE_TOPOLOGY_SIBLING_CPUMASK */
93 #endif /* __LIBCFS_LINUX_CPU_H__ */