1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2008, Jeffrey Roberson <jeff@freebsd.org> 5 * All rights reserved. 6 * 7 * Copyright (c) 2008 Nokia Corporation 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice unmodified, this list of conditions, and the following 15 * disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 * 31 * $FreeBSD$ 32 */ 33 34 #ifndef _SYS_CPUSET_H_ 35 #define _SYS_CPUSET_H_ 36 37 #include <sys/_cpuset.h> 38 39 #include <sys/_bitset.h> 40 #include <sys/bitset.h> 41 42 #define _NCPUBITS _BITSET_BITS 43 #define _NCPUWORDS __bitset_words(CPU_SETSIZE) 44 45 #define CPUSETBUFSIZ ((2 + sizeof(long) * 2) * _NCPUWORDS) 46 47 #define CPU_CLR(n, p) __BIT_CLR(CPU_SETSIZE, n, p) 48 #define CPU_COPY(f, t) __BIT_COPY(CPU_SETSIZE, f, t) 49 #define CPU_ISSET(n, p) __BIT_ISSET(CPU_SETSIZE, n, p) 50 #define CPU_SET(n, p) __BIT_SET(CPU_SETSIZE, n, p) 51 #define CPU_ZERO(p) __BIT_ZERO(CPU_SETSIZE, p) 52 #define CPU_FILL(p) __BIT_FILL(CPU_SETSIZE, p) 53 #define CPU_SETOF(n, p) __BIT_SETOF(CPU_SETSIZE, n, p) 54 #define CPU_EQUAL(p, c) (__BIT_CMP(CPU_SETSIZE, p, c) == 0) 55 #define CPU_EMPTY(p) __BIT_EMPTY(CPU_SETSIZE, p) 56 #define CPU_ISFULLSET(p) __BIT_ISFULLSET(CPU_SETSIZE, p) 57 #define CPU_SUBSET(p, c) __BIT_SUBSET(CPU_SETSIZE, p, c) 58 #define CPU_OVERLAP(p, c) __BIT_OVERLAP(CPU_SETSIZE, p, c) 59 #define CPU_CMP(p, c) __BIT_CMP(CPU_SETSIZE, p, c) 60 #define CPU_OR(d, s1, s2) __BIT_OR2(CPU_SETSIZE, d, s1, s2) 61 #define CPU_AND(d, s1, s2) __BIT_AND2(CPU_SETSIZE, d, s1, s2) 62 #define CPU_ANDNOT(d, s1, s2) __BIT_ANDNOT2(CPU_SETSIZE, d, s1, s2) 63 #define CPU_XOR(d, s1, s2) __BIT_XOR2(CPU_SETSIZE, d, s1, s2) 64 #define CPU_CLR_ATOMIC(n, p) __BIT_CLR_ATOMIC(CPU_SETSIZE, n, p) 65 #define CPU_SET_ATOMIC(n, p) __BIT_SET_ATOMIC(CPU_SETSIZE, n, p) 66 #define CPU_SET_ATOMIC_ACQ(n, p) __BIT_SET_ATOMIC_ACQ(CPU_SETSIZE, n, p) 67 #define CPU_AND_ATOMIC(n, p) __BIT_AND_ATOMIC(CPU_SETSIZE, n, p) 68 #define CPU_OR_ATOMIC(d, s) __BIT_OR_ATOMIC(CPU_SETSIZE, d, s) 69 #define CPU_COPY_STORE_REL(f, t) __BIT_COPY_STORE_REL(CPU_SETSIZE, f, t) 70 #define CPU_FFS(p) __BIT_FFS(CPU_SETSIZE, p) 71 #define CPU_FLS(p) __BIT_FLS(CPU_SETSIZE, p) 72 #define CPU_FOREACH_ISSET(i, p) __BIT_FOREACH_ISSET(CPU_SETSIZE, i, p) 73 #define CPU_FOREACH_ISCLR(i, p) __BIT_FOREACH_ISCLR(CPU_SETSIZE, i, p) 74 #define CPU_COUNT(p) ((int)__BIT_COUNT(CPU_SETSIZE, p)) 75 #define CPUSET_FSET __BITSET_FSET(_NCPUWORDS) 76 #define CPUSET_T_INITIALIZER(x) __BITSET_T_INITIALIZER(x) 77 78 #if !defined(_KERNEL) 79 #define CPU_ALLOC_SIZE(_s) __BITSET_SIZE(_s) 80 #define CPU_ALLOC(_s) __cpuset_alloc(_s) 81 #define CPU_FREE(p) __cpuset_free(p) 82 83 #define CPU_ISSET_S(n, _s, p) __BIT_ISSET(_s, n, p) 84 #define CPU_SET_S(n, _s, p) __BIT_SET(_s, n, p) 85 #define CPU_CLR_S(n, _s, p) __BIT_CLR(_s, n, p) 86 #define CPU_ZERO_S(_s, p) __BIT_ZERO(_s, p) 87 88 #define CPU_OR_S(_s, d, s1, s2) __BIT_OR2(_s, d, s1, s2) 89 #define CPU_AND_S(_s, d, s1, s2) __BIT_AND2(_s, d, s1, s2) 90 #define CPU_XOR_S(_s, d, s1, s2) __BIT_XOR2(_s, d, s1, s2) 91 92 #define CPU_COUNT_S(_s, p) ((int)__BIT_COUNT(_s, p)) 93 #define CPU_EQUAL_S(_s, p, c) (__BIT_CMP(_s, p, c) == 0) 94 #endif 95 96 /* 97 * Valid cpulevel_t values. 98 */ 99 #define CPU_LEVEL_ROOT 1 /* All system cpus. */ 100 #define CPU_LEVEL_CPUSET 2 /* Available cpus for which. */ 101 #define CPU_LEVEL_WHICH 3 /* Actual mask/id for which. */ 102 103 /* 104 * Valid cpuwhich_t values. 105 */ 106 #define CPU_WHICH_TID 1 /* Specifies a thread id. */ 107 #define CPU_WHICH_PID 2 /* Specifies a process id. */ 108 #define CPU_WHICH_CPUSET 3 /* Specifies a set id. */ 109 #define CPU_WHICH_IRQ 4 /* Specifies an irq #. */ 110 #define CPU_WHICH_JAIL 5 /* Specifies a jail id. */ 111 #define CPU_WHICH_DOMAIN 6 /* Specifies a NUMA domain id. */ 112 #define CPU_WHICH_INTRHANDLER 7 /* Specifies an irq # (not ithread). */ 113 #define CPU_WHICH_ITHREAD 8 /* Specifies an irq's ithread. */ 114 115 /* 116 * Reserved cpuset identifiers. 117 */ 118 #define CPUSET_INVALID -1 119 #define CPUSET_DEFAULT 0 120 121 #ifdef _KERNEL 122 #include <sys/queue.h> 123 124 LIST_HEAD(setlist, cpuset); 125 126 /* 127 * cpusets encapsulate cpu binding information for one or more threads. 128 * 129 * a - Accessed with atomics. 130 * s - Set at creation, never modified. Only a ref required to read. 131 * c - Locked internally by a cpuset lock. 132 * 133 * The bitmask is only modified while holding the cpuset lock. It may be 134 * read while only a reference is held but the consumer must be prepared 135 * to deal with inconsistent results. 136 */ 137 struct cpuset { 138 volatile u_int cs_ref; /* (a) Reference count. */ 139 int cs_flags; /* (s) Flags from below. */ 140 LIST_ENTRY(cpuset) cs_link; /* (c) All identified sets. */ 141 LIST_ENTRY(cpuset) cs_siblings; /* (c) Sibling set link. */ 142 struct setlist cs_children; /* (c) List of children. */ 143 struct domainset *cs_domain; /* (c) NUMA policy. */ 144 cpusetid_t cs_id; /* (s) Id or INVALID. */ 145 struct cpuset *cs_parent; /* (s) Pointer to our parent. */ 146 cpuset_t cs_mask; /* bitmask of valid cpus. */ 147 }; 148 149 #define CPU_SET_ROOT 0x0001 /* Set is a root set. */ 150 #define CPU_SET_RDONLY 0x0002 /* No modification allowed. */ 151 152 extern cpuset_t *cpuset_root; 153 struct prison; 154 struct proc; 155 struct thread; 156 157 struct cpuset *cpuset_thread0(void); 158 struct cpuset *cpuset_ref(struct cpuset *); 159 void cpuset_rel(struct cpuset *); 160 int cpuset_setthread(lwpid_t id, cpuset_t *); 161 int cpuset_setithread(lwpid_t id, int cpu); 162 int cpuset_create_root(struct prison *, struct cpuset **); 163 int cpuset_setproc_update_set(struct proc *, struct cpuset *); 164 int cpuset_which(cpuwhich_t, id_t, struct proc **, 165 struct thread **, struct cpuset **); 166 void cpuset_kernthread(struct thread *); 167 168 char *cpusetobj_strprint(char *, const cpuset_t *); 169 int cpusetobj_strscan(cpuset_t *, const char *); 170 #ifdef DDB 171 void ddb_display_cpuset(const cpuset_t *); 172 #endif 173 174 #else 175 __BEGIN_DECLS 176 int cpuset(cpusetid_t *); 177 int cpuset_setid(cpuwhich_t, id_t, cpusetid_t); 178 int cpuset_getid(cpulevel_t, cpuwhich_t, id_t, cpusetid_t *); 179 int cpuset_getaffinity(cpulevel_t, cpuwhich_t, id_t, size_t, cpuset_t *); 180 int cpuset_setaffinity(cpulevel_t, cpuwhich_t, id_t, size_t, const cpuset_t *); 181 __END_DECLS 182 #endif 183 #endif /* !_SYS_CPUSET_H_ */ 184