312c339026
Contrary to the AMD implementation, it doesn't use xcalls to distribute the update to all CPUs but relies on cpuctl(8) to bind itself to the right CPU -- to keep it simple and avoid possible problems with hyperthreading. Also, it doesn't parse the vendor supplied file to pick the right part for the present CPU model but relies on userland to prepare files with specific filenames. I'll commit a pkg for this in a minute (pkgsrc/sysutils/intel-microcode). The ioctl interface changed; compatibility is provided (should be limited to COMPAT_NETBSD6 as soon as this is available).
361 lines
8.4 KiB
C
361 lines
8.4 KiB
C
/* $NetBSD: cpuctl.c,v 1.21 2012/08/29 17:13:22 drochner Exp $ */
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/*-
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* Copyright (c) 2007, 2008, 2009, 2012 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 1.21 2012/08/29 17:13:22 drochner 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 "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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int takesargs;
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int argsoptional;
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void (*func)(char **);
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} const cpu_cmdtab[] = {
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{ "identify", 1, 0, cpu_identify },
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{ "list", 0, 0, cpu_list },
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{ "offline", 1, 0, cpu_offline },
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{ "online", 1, 0, cpu_online },
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{ "intr", 1, 0, cpu_intr },
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{ "nointr", 1, 0, cpu_nointr },
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{ "ucode", 1, 1, cpu_ucode },
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{ NULL, 0, 0, NULL },
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};
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static int fd;
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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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if (argc < 2)
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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[1], ct->label) == 0) {
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if (!ct->argsoptional &&
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((ct->takesargs == 0) ^ (argv[2] == NULL)))
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{
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usage();
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}
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(*ct->func)(argv + 2);
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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[optind]);
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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 [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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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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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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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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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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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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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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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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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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id = getcpuid(argv);
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snprintf(name, sizeof(name), "cpu%u", id);
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if (np != 0) {
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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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static u_int
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getcpuid(char **argv)
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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(argv[0], &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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