384 lines
8.8 KiB
C
384 lines
8.8 KiB
C
/* $NetBSD: cpuctl.c,v 1.28 2015/11/16 03:34:50 mrg Exp $ */
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/*-
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* Copyright (c) 2007, 2008, 2009, 2012, 2015 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Andrew Doran.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef lint
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: cpuctl.c,v 1.28 2015/11/16 03:34:50 mrg Exp $");
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/uio.h>
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#include <sys/cpuio.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <paths.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <unistd.h>
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#include <util.h>
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#include <time.h>
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#include <sched.h>
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#include <stdbool.h>
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#include "cpuctl.h"
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static u_int getcpuid(char *);
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__dead static void usage(void);
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static void cpu_identify(char **);
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static void cpu_list(char **);
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static void cpu_offline(char **);
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static void cpu_online(char **);
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static void cpu_intr(char **);
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static void cpu_nointr(char **);
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static void cpu_ucode(char **);
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static struct cmdtab {
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const char *label;
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bool takesargs;
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bool argsoptional;
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void (*func)(char **);
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} const cpu_cmdtab[] = {
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{ "identify", true, false, cpu_identify },
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{ "list", false, false, cpu_list },
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{ "offline", true, false, cpu_offline },
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{ "online", true, false, cpu_online },
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{ "intr", true, false, cpu_intr },
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{ "nointr", true, false, cpu_nointr },
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{ "ucode", true, true, cpu_ucode },
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{ NULL, false, false, NULL },
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};
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static int fd;
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int verbose;
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int
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main(int argc, char **argv)
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{
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const struct cmdtab *ct;
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int ch;
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while ((ch = getopt(argc, argv, "v")) != -1)
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switch (ch) {
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case 'v':
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verbose = 1;
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break;
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc < 1)
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usage();
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if ((fd = open(_PATH_CPUCTL, O_RDWR)) < 0)
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err(EXIT_FAILURE, _PATH_CPUCTL);
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for (ct = cpu_cmdtab; ct->label != NULL; ct++) {
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if (strcmp(argv[0], ct->label) == 0) {
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if (!ct->argsoptional &&
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((ct->takesargs == 0) ^ (argv[1] == NULL)))
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{
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usage();
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}
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(*ct->func)(argv + 1);
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break;
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}
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}
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if (ct->label == NULL)
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errx(EXIT_FAILURE, "unknown command ``%s''", argv[0]);
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close(fd);
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exit(EXIT_SUCCESS);
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/* NOTREACHED */
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}
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static void
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usage(void)
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{
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const char *progname = getprogname();
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fprintf(stderr, "usage: %s identify cpuno\n", progname);
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fprintf(stderr, " %s list\n", progname);
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fprintf(stderr, " %s offline cpuno\n", progname);
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fprintf(stderr, " %s online cpuno\n", progname);
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fprintf(stderr, " %s intr cpuno\n", progname);
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fprintf(stderr, " %s nointr cpuno\n", progname);
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fprintf(stderr, " %s ucode [cpuno] [file]\n", progname);
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exit(EXIT_FAILURE);
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/* NOTREACHED */
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}
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static void
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cpu_online(char **argv)
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{
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cpustate_t cs;
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for (; *argv; argv++) {
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cs.cs_id = getcpuid(*argv);
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if (ioctl(fd, IOC_CPU_GETSTATE, &cs) < 0)
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err(EXIT_FAILURE, "IOC_CPU_GETSTATE");
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cs.cs_online = true;
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if (ioctl(fd, IOC_CPU_SETSTATE, &cs) < 0)
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err(EXIT_FAILURE, "IOC_CPU_SETSTATE");
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}
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}
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static void
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cpu_offline(char **argv)
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{
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cpustate_t cs;
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for (; *argv; argv++) {
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cs.cs_id = getcpuid(*argv);
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if (ioctl(fd, IOC_CPU_GETSTATE, &cs) < 0)
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err(EXIT_FAILURE, "IOC_CPU_GETSTATE");
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cs.cs_online = false;
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if (ioctl(fd, IOC_CPU_SETSTATE, &cs) < 0)
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err(EXIT_FAILURE, "IOC_CPU_SETSTATE");
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}
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}
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static void
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cpu_intr(char **argv)
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{
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cpustate_t cs;
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for (; *argv; argv++) {
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cs.cs_id = getcpuid(*argv);
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if (ioctl(fd, IOC_CPU_GETSTATE, &cs) < 0)
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err(EXIT_FAILURE, "IOC_CPU_GETSTATE");
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cs.cs_intr = true;
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if (ioctl(fd, IOC_CPU_SETSTATE, &cs) < 0)
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err(EXIT_FAILURE, "IOC_CPU_SETSTATE");
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}
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}
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static void
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cpu_nointr(char **argv)
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{
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cpustate_t cs;
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for (; *argv; argv++) {
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cs.cs_id = getcpuid(*argv);
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if (ioctl(fd, IOC_CPU_GETSTATE, &cs) < 0)
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err(EXIT_FAILURE, "IOC_CPU_GETSTATE");
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cs.cs_intr = false;
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if (ioctl(fd, IOC_CPU_SETSTATE, &cs) < 0) {
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if (errno == EOPNOTSUPP) {
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warnx("interrupt control not supported on "
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"this platform");
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} else
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err(EXIT_FAILURE, "IOC_CPU_SETSTATE");
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}
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}
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}
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static void
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cpu_ucode(char **argv)
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{
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int error;
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struct cpu_ucode uc;
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unsigned long id = 0; /* gcc */
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char *ep;
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cpuset_t *cpuset;
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uc.cpu_nr = -1;
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if (argv[0] != NULL) {
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id = strtoul(argv[0], &ep, 0);
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if (id != ULONG_MAX && *ep == '\0') {
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uc.cpu_nr = id;
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argv++;
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}
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}
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if (argv[0] != NULL)
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strlcpy(uc.fwname, argv[0], sizeof(uc.fwname));
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else
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memset(uc.fwname, '\0', sizeof(uc.fwname));
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error = ucodeupdate_check(fd, &uc);
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if (error)
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errx(EXIT_FAILURE, "unsupported");
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if (uc.cpu_nr == CPU_UCODE_CURRENT_CPU) {
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cpuset = cpuset_create();
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if (cpuset == NULL)
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err(EXIT_FAILURE, "cpuset_create");
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cpuset_zero(cpuset);
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cpuset_set(id, cpuset);
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if (_sched_setaffinity(0, 0, cpuset_size(cpuset), cpuset) < 0) {
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err(EXIT_FAILURE, "_sched_setaffinity");
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}
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cpuset_destroy(cpuset);
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}
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error = ioctl(fd, IOC_CPU_UCODE_APPLY, &uc);
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if (error < 0) {
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if (uc.fwname[0])
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err(EXIT_FAILURE, "%s", uc.fwname);
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else
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err(EXIT_FAILURE, "IOC_CPU_UCODE_APPLY");
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}
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}
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static void
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cpu_identify(char **argv)
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{
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char name[32];
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unsigned int id, np;
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cpuset_t *cpuset;
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np = sysconf(_SC_NPROCESSORS_CONF);
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for (; *argv; argv++) {
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id = getcpuid(*argv);
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snprintf(name, sizeof(name), "cpu%u", id);
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if (np != 1) {
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cpuset = cpuset_create();
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if (cpuset == NULL)
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err(EXIT_FAILURE, "cpuset_create");
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cpuset_zero(cpuset);
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cpuset_set(id, cpuset);
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if (_sched_setaffinity(0, 0, cpuset_size(cpuset), cpuset) < 0) {
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if (errno == EPERM) {
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printf("Cannot bind to target CPU. Output "
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"may not accurately describe the target.\n"
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"Run as root to allow binding.\n\n");
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} else {
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err(EXIT_FAILURE, "_sched_setaffinity");
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}
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}
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cpuset_destroy(cpuset);
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}
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identifycpu(fd, name);
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}
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}
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static u_int
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getcpuid(char *arg)
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{
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char *argp;
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u_int id;
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long np;
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id = (u_int)strtoul(arg, &argp, 0);
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if (*argp != '\0')
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usage();
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np = sysconf(_SC_NPROCESSORS_CONF);
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if (id >= (u_long)np)
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errx(EXIT_FAILURE, "Invalid CPU number");
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return id;
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}
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static void
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cpu_list(char **argv)
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{
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const char *state, *intr;
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cpustate_t cs;
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u_int cnt, i;
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time_t lastmod;
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char ibuf[16], *ts;
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if (ioctl(fd, IOC_CPU_GETCOUNT, &cnt) < 0)
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err(EXIT_FAILURE, "IOC_CPU_GETCOUNT");
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printf(
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"Num HwId Unbound LWPs Interrupts Last change #Intr\n"
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"---- ---- ------------ ---------- ------------------------ -----\n");
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for (i = 0; i < cnt; i++) {
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cs.cs_id = i;
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if (ioctl(fd, IOC_CPU_GETSTATE, &cs) < 0)
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err(EXIT_FAILURE, "IOC_CPU_GETSTATE");
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if (ioctl(fd, IOC_CPU_MAPID, &cs.cs_id) < 0)
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err(EXIT_FAILURE, "IOC_CPU_MAPID");
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if (cs.cs_online)
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state = "online";
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else
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state = "offline";
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if (cs.cs_intr)
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intr = "intr";
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else
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intr = "nointr";
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if (cs.cs_intrcnt == 0)
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strcpy(ibuf, "?");
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else
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snprintf(ibuf, sizeof(ibuf), "%d", cs.cs_intrcnt - 1);
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lastmod = (time_t)cs.cs_lastmod |
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((time_t)cs.cs_lastmodhi << 32);
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ts = asctime(localtime(&lastmod));
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ts[strlen(ts) - 1] = '\0';
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printf("%-4d %-4x %-12s %-10s %s %-5s\n",
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i, cs.cs_hwid, state,
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intr, ts, ibuf);
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}
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}
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int
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aprint_normal(const char *fmt, ...)
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{
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va_list ap;
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int rv;
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va_start(ap, fmt);
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rv = vfprintf(stdout, fmt, ap);
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va_end(ap);
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return rv;
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}
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__strong_alias(aprint_verbose,aprint_normal)
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__strong_alias(aprint_error,aprint_normal)
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int
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aprint_normal_dev(const char *dev, const char *fmt, ...)
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{
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va_list ap;
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int rv;
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printf("%s: ", dev);
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va_start(ap, fmt);
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rv = vfprintf(stdout, fmt, ap);
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va_end(ap);
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return rv;
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}
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__strong_alias(aprint_verbose_dev,aprint_normal_dev)
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__strong_alias(aprint_error_dev,aprint_normal_dev)
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