1 /* 2 * This file and its contents are supplied under the terms of the 3 * Common Development and Distribution License ("CDDL"), version 1.0. 4 * You may only use this file in accordance with the terms of version 5 * 1.0 of the CDDL. 6 * 7 * A full copy of the text of the CDDL should have accompanied this 8 * source. A copy of the CDDL is also available via the Internet at 9 * http://www.illumos.org/license/CDDL. 10 */ 11 12 /* 13 * Copyright 2019 Joyent, Inc. 14 */ 15 16 #include <sys/cpuid_drv.h> 17 18 #include <libintl.h> 19 #include <string.h> 20 #include <locale.h> 21 #include <unistd.h> 22 #include <stdlib.h> 23 #include <fcntl.h> 24 #include <stdio.h> 25 #include <errno.h> 26 #include <err.h> 27 28 static const char dev_cpu_self_cpuid[] = "/dev/" CPUID_SELF_NAME; 29 30 int 31 main(int argc, char *argv[]) 32 { 33 int ret = EXIT_SUCCESS; 34 int errflg = 0; 35 int fd; 36 int c; 37 38 (void) setlocale(LC_ALL, ""); 39 (void) textdomain(TEXT_DOMAIN); 40 41 while ((c = getopt(argc, argv, "")) != EOF) { 42 switch (c) { 43 case '?': 44 default: 45 errflg++; 46 break; 47 } 48 } 49 50 if (errflg != 0 || optind == argc) { 51 fprintf(stderr, gettext("usage: rdmsr [0x<msrnr>...]\n")); 52 return (EXIT_FAILURE); 53 } 54 55 if ((fd = open(dev_cpu_self_cpuid, O_RDONLY)) == -1) { 56 err(EXIT_FAILURE, gettext("failed to open %s"), 57 dev_cpu_self_cpuid); 58 } 59 60 while (optind != argc) { 61 struct cpuid_rdmsr crm; 62 char *p; 63 64 errno = 0; 65 crm.cr_msr_nr = strtoull(argv[optind], &p, 0); 66 67 if (errno != 0 || p == argv[optind] || *p != '\0') { 68 fprintf(stderr, 69 gettext("rdmsr: invalid argument '%s'\n"), 70 argv[optind]); 71 exit(EXIT_FAILURE); 72 } 73 74 if (ioctl(fd, CPUID_RDMSR, &crm) != 0) { 75 warn(gettext("rdmsr of 0x%lx failed"), crm.cr_msr_nr); 76 ret = EXIT_FAILURE; 77 } else { 78 printf("0x%lx: 0x%lx\n", crm.cr_msr_nr, crm.cr_msr_val); 79 } 80 81 optind++; 82 } 83 84 return (ret); 85 } 86