cpuctl.c revision 1.2
1 /* $NetBSD: cpuctl.c,v 1.2 2008/01/09 00:01:33 tnn Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Andrew Doran. 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, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #ifndef lint 40 #include <sys/cdefs.h> 41 __RCSID("$NetBSD: cpuctl.c,v 1.2 2008/01/09 00:01:33 tnn Exp $"); 42 #endif /* not lint */ 43 44 #include <sys/param.h> 45 #include <sys/ioctl.h> 46 #include <sys/uio.h> 47 #include <sys/cpuio.h> 48 49 #include <err.h> 50 #include <errno.h> 51 #include <fcntl.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <stdarg.h> 55 #include <string.h> 56 #include <unistd.h> 57 #include <util.h> 58 #include <time.h> 59 60 u_int getcpuid(char **); 61 int main(int, char **); 62 void usage(void); 63 64 void cpu_list(char **); 65 void cpu_offline(char **); 66 void cpu_online(char **); 67 68 struct cmdtab { 69 const char *label; 70 int takesargs; 71 void (*func)(char **); 72 } const cpu_cmdtab[] = { 73 { "list", 0, cpu_list }, 74 { "offline", 1, cpu_offline }, 75 { "online", 1, cpu_online }, 76 { NULL, 0, NULL }, 77 }; 78 79 int fd; 80 81 int 82 main(int argc, char **argv) 83 { 84 const struct cmdtab *ct; 85 86 if (argc < 2) 87 usage(); 88 89 if ((fd = open("/dev/cpuctl", O_RDWR)) < 0) 90 err(EXIT_FAILURE, "/dev/cpuctl"); 91 92 for (ct = cpu_cmdtab; ct->label != NULL; ct++) { 93 if (strcmp(argv[1], ct->label) == 0) { 94 if ((ct->takesargs == 0) ^ (argv[2] == NULL)) 95 usage(); 96 (*ct->func)(argv + 2); 97 break; 98 } 99 } 100 101 if (ct->label == NULL) 102 errx(EXIT_FAILURE, "unknown command ``%s''", argv[optind]); 103 104 close(fd); 105 exit(EXIT_SUCCESS); 106 /* NOTREACHED */ 107 } 108 109 void 110 usage(void) 111 { 112 const char *progname = getprogname(); 113 114 fprintf(stderr, "usage: %s list\n", progname); 115 fprintf(stderr, " %s offline cpuid\n", progname); 116 fprintf(stderr, " %s online cpuid\n", progname); 117 exit(EXIT_FAILURE); 118 /* NOTREACHED */ 119 } 120 121 void 122 cpu_online(char **argv) 123 { 124 cpustate_t cs; 125 126 cs.cs_id = getcpuid(argv); 127 if (ioctl(fd, IOC_CPU_GETSTATE, &cs) < 0) 128 err(EXIT_FAILURE, "IOC_CPU_GETSTATE"); 129 cs.cs_online = true; 130 if (ioctl(fd, IOC_CPU_SETSTATE, &cs) < 0) 131 err(EXIT_FAILURE, "IOC_CPU_SETSTATE"); 132 } 133 134 void 135 cpu_offline(char **argv) 136 { 137 cpustate_t cs; 138 139 cs.cs_id = getcpuid(argv); 140 if (ioctl(fd, IOC_CPU_GETSTATE, &cs) < 0) 141 err(EXIT_FAILURE, "IOC_CPU_GETSTATE"); 142 cs.cs_online = false; 143 if (ioctl(fd, IOC_CPU_SETSTATE, &cs) < 0) 144 err(EXIT_FAILURE, "IOC_CPU_SETSTATE"); 145 } 146 147 u_int 148 getcpuid(char **argv) 149 { 150 char *argp; 151 u_int id; 152 153 id = (int)strtoul(argv[0], &argp, 0); 154 if (*argp != '\0') 155 usage(); 156 157 return id; 158 } 159 160 void 161 cpu_list(char **argv) 162 { 163 const char *state, *intr; 164 cpustate_t cs; 165 u_int cnt, i; 166 167 if (ioctl(fd, IOC_CPU_GETCOUNT, &cnt) < 0) 168 err(EXIT_FAILURE, "IOC_CPU_GETCOUNT"); 169 170 printf("ID Unbound LWPs Interrupts Last change\n"); 171 printf("---- ------------ -------------- ----------------------------\n"); 172 173 for (i = 0; i < cnt; i++) { 174 cs.cs_id = i; 175 if (ioctl(fd, IOC_CPU_MAPID, &cs.cs_id) < 0) 176 err(EXIT_FAILURE, "IOC_CPU_MAPID"); 177 if (ioctl(fd, IOC_CPU_GETSTATE, &cs) < 0) 178 err(EXIT_FAILURE, "IOC_CPU_GETINFO"); 179 if (cs.cs_online) 180 state = "online"; 181 else 182 state = "offline"; 183 if (cs.cs_intr) 184 intr = "intr"; 185 else 186 intr = "nointr"; 187 printf("%-4d %-12s %-12s %s", cs.cs_id, state, 188 intr, asctime(localtime(&cs.cs_lastmod))); 189 } 190 } 191
Indexes created Thu Oct 02 14:10:14 GMT 2025