/* SPDX-License-Identifier: GPL-2.0-only */ #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <string.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <errno.h> #include <pci/pci.h> #include "msrtool.h" #define DEFAULT_CPU 0 static uint8_t cpu = DEFAULT_CPU; uint8_t targets_found = 0; const struct targetdef **targets = NULL; const struct sysdef *sys = NULL; uint8_t reserved = 0, verbose = 0, quiet = 0; struct pci_access *pacc = NULL; static struct targetdef alltargets[] = { { "geodegx2", "AMD Geode(tm) GX2", geodegx2_probe, geodegx2_msrs }, { "geodelx", "AMD Geode(tm) LX", geodelx_probe, geodelx_msrs }, { "cs5536", "AMD Geode(tm) CS5536", cs5536_probe, cs5536_msrs }, { "K8", "AMD K8 Family", k8_probe, k8_msrs }, { "via_c7", "VIA Esther processor, C7", via_c7_probe, via_c7_msrs }, { "intel_pentium3_early", "Intel Pentium III family", intel_pentium3_early_probe, intel_pentium3_early_msrs }, { "intel_pentium3", "Intel Pentium III Xeon Processor, Intel Pentium III Processor", intel_pentium3_probe, intel_pentium3_msrs }, { "intel_core1", "Intel Core Duo, Intel Core Solo processors", intel_core1_probe, intel_core1_msrs }, { "intel_core2_early", "Intel Xeon Processor 3000, 3200, 5100, 5300, 7300 series, Intel Core 2 Quad processor 6000 series, Intel Core 2 Extreme 6000 series, Intel Core 2 Duo 4000, 5000, 6000, 7000 series processors, Intel Pentium dual-core processors", intel_core2_early_probe, intel_core2_early_msrs }, { "intel_core2_later", "Intel Xeon Processor 5200, 5400 series, Intel Core 2 Quad processors 8000, 9000 series", intel_core2_later_probe, intel_core2_later_msrs }, { "intel_pentium4_early", "Intel Xeon Processor, Intel Xeon Processor MP, Intel Pentium 4 processors", intel_pentium4_early_probe, intel_pentium4_early_msrs }, { "intel_pentium4_later", "Intel Xeon Processor, Intel Xeon Processor MP, Intel Pentium 4, Pentium D processors", intel_pentium4_later_probe, intel_pentium4_later_msrs }, { "intel_pentium_d", "Intel Pentium D processors", intel_pentium_d_probe, intel_pentium_d_msrs }, { "intel_nehalem", "Intel Core i5, i7 Processors, Intel Xeon Processor 3400, 3500, 5500, based on Nehalem architecture", intel_nehalem_probe, intel_nehalem_msrs }, { "intel_atom", "Intel Atom Processors, N450", intel_atom_probe, intel_atom_msrs }, { TARGET_EOT } }; static struct sysdef allsystems[] = { { "linux", "Linux with /dev/cpu/*/msr", linux_probe, linux_open, linux_close, linux_rdmsr }, { "darwin", "Mac OS X with DirectHW", darwin_probe, darwin_open, darwin_close, darwin_rdmsr }, { "freebsd", "FreeBSD with /dev/cpuctl*", freebsd_probe, freebsd_open, freebsd_close, freebsd_rdmsr }, { SYSTEM_EOT } }; static void syntax(char *argv[]) { printf("syntax: %s [-hvqrkl] [-c cpu] [-m system] [-t target ...]\n", argv[0]); printf("\t [-i addr=hi[:]lo] | [-s file] | [-d [:]file] | addr...\n"); printf(" -h\t show this help text\n"); printf(" -v\t be verbose\n"); printf(" -q\t be quiet (overrides -v)\n"); printf(" -r\t include [Reserved] values\n"); printf(" -k\t list all known systems and targets\n"); printf(" -l\t list MSRs and bit fields for current target(s) (-kl for ALL targets!)\n"); printf(" -c\t access MSRs on the specified CPU, default=%d\n", DEFAULT_CPU); printf(" -m\t force a system, e.g: -m linux\n"); printf(" -t\t force a target, can be used multiple times, e.g: -t geodelx -t cs5536\n"); printf(" -i\t immediate mode\n"); printf("\t decode hex addr=hi:lo for the target without reading hw value\n"); printf("\t e.g: -i 4c00000f=f2f100ff56960004\n"); printf(" -s\t stream mode\n"); printf("\t read one MSR address per line and append current hw value to the line\n"); printf("\t use the filename - for stdin/stdout\n"); printf("\t using -l -s ignores input and will output all MSRs with values\n"); printf(" -d\t diff mode\n"); printf("\t read one address and value per line and compare with current hw value,\n"); printf("\t printing differences to stdout. use the filename - to read from stdin\n"); printf("\t use :file or :- to reverse diff, normally hw values are considered new\n"); printf(" addr.. direct mode, read and decode values for the given MSR address(es)\n"); } static void *add_target(const struct targetdef *t) { void *tmp; tmp = realloc(targets, (targets_found + 2) * sizeof(struct targetdef *)); if (NULL == tmp) { perror("realloc"); return tmp; } targets = tmp; targets[targets_found++] = t; targets[targets_found] = NULL; return targets; } static int found_system() { if (!sys || (sys && !sys->name)) { fprintf(stderr, "Unable to detect the current operating system!\n"); fprintf(stderr, "On Linux, please run 'modprobe msr' and try again.\n"); fprintf(stderr, "Please send a report or patch to coreboot@coreboot.org. Thanks for your help!\n"); fprintf(stderr, "\n"); } return (sys && sys->name); } int do_stream(const char *streamfn, uint8_t ignoreinput) { char tmpfn[20], line[256]; uint8_t tn; size_t start, len; int ret = 1; int fdout = -1; FILE *fin = NULL, *fout = NULL; uint32_t addr, linenum; struct msr m = MSR1(0); if (0 == strcmp(streamfn, "-")) { fin = stdin; fout = stdout; } else { if (!ignoreinput) { if (NULL == (fin = fopen(streamfn, "r"))) { perror("fopen()"); return 1; } if (snprintf(tmpfn, sizeof(tmpfn), "msrtoolXXXXXX") >= sizeof(tmpfn)) { perror("snprintf"); return 1; } if (-1 == (fdout = mkstemp(tmpfn))) { perror("mkstemp"); return 1; } if (NULL == (fout = fdopen(fdout, "w"))) { perror("fdopen"); return 1; } } else { if (NULL == (fout = fopen(streamfn, "w"))) { perror("fopen"); return 1; } } } if (!found_system()) goto done; if (!sys->open(cpu, SYS_RDONLY)) goto done; if (ignoreinput) { for (tn = 0; tn < targets_found; tn++) if (dumpmsrdefsvals(fout, targets[tn], cpu)) { ret = 1; break; } } else { for (linenum = 1; NULL != fgets(line, sizeof(line), fin); ++linenum) { start = (0 == strncmp("0x", line, 2)) ? 2 : 0; if (1 == sscanf(line + start, "%8x", &addr)) { if (!sys->rdmsr(cpu, addr, &m)) goto done; fprintf(fout, "0x%08x 0x%08x%08x\n", addr, m.hi, m.lo); continue; } while (1) { fprintf(fout, "%s", line); len = strlen(line); if (NULL != strchr("\r\n", line[len - 1])) break; if (NULL == fgets(line, sizeof(line), fin)) goto read_done; } } read_done: if (!feof(fin)) { fprintf(stderr, "%s:%d: fgets: %s\n", streamfn, linenum, strerror(errno)); goto done; } } ret = 0; done: sys->close(cpu); if (strcmp(streamfn, "-")) { if (ret) unlink(tmpfn); else if (!ignoreinput) rename(tmpfn, streamfn); } if (!ignoreinput) fclose(fin); fclose(fout); return ret; } int do_diff(const char *difffn) { char tmpfn[20], line[512], *m1start, *m2start; size_t len; int ret = 1, tmp, m1pos, sys_opened = 0; FILE *fin = NULL, *fout = stdout; uint8_t rev = 0; uint32_t addr, linenum; struct msr m1 = MSR1(0), m2 = MSR1(0); if (':' == difffn[0]) { rev = 1; ++difffn; } if (0 == strcmp(difffn, "-")) fin = stdin; else if (NULL == (fin = fopen(difffn, "r"))) { perror("fopen()"); return 1; } for (linenum = 1; NULL != fgets(line, sizeof(line), fin); ++linenum) { tmp = strncmp("0x", line, 2) ? 0 : 2; if (sscanf(line + tmp, "%8x %n%*x", &addr, &m1pos) < 1) continue; m1start = line + tmp + m1pos; for (len = strlen(m1start) - 1; NULL != strchr("\r\n", m1start[len]); --len) m1start[len] = 0; if (!str2msr(m1start, &m1, &m2start)) { fprintf(stderr, "%s:%d: invalid MSR1 value '%s'\n", difffn, linenum, m1start); continue; } while (' ' == *m2start) ++m2start; if (!str2msr(m2start, &m2, NULL)) { fprintf(stderr, "%s:%d: invalid MSR2 value '%s' - reading from hardware!\n", difffn, linenum, m2start); if (!sys_opened) { if (!found_system()) goto done; sys_opened = sys->open(cpu, SYS_RDONLY); if (!sys_opened) goto done; } if (!sys->rdmsr(cpu, addr, &m2)) goto done; } if (diff_msr(fout, addr, rev ? m2 : m1, rev ? m1 : m2)) fprintf(fout, "\n"); } if (!feof(fin)) fprintf(stderr, "%s:%d: fgets: %s\n", difffn, linenum, strerror(errno)); else ret = 0; done: if (sys_opened) sys->close(cpu); if (strcmp(difffn, "-")) { if (ret) unlink(tmpfn); else rename(tmpfn, difffn); fclose(fin); fclose(fout); } return ret; } int main(int argc, char *argv[]) { char c; int ret = 1; const struct sysdef *s; const struct targetdef *t; uint8_t tn, listmsrs = 0, listknown = 0, input = 0; uint32_t addr = 0; const char *streamfn = NULL, *difffn = NULL; struct msr msrval = MSR2(-1, -1); while ((c = getopt(argc, argv, "hqvrklc:m:t:a:i:s:d:")) != -1) switch (c) { case 'h': syntax(argv); return 0; case 'q': quiet = 1; break; case 'v': ++verbose; break; case 'r': reserved = 1; break; case 'k': listknown = 1; break; case 'l': listmsrs = 1; break; case 'c': cpu = atoi(optarg); break; case 'm': for (s = allsystems; !SYSTEM_ISEOT(*s); s++) if (!strcmp(s->name, optarg)) { sys = s; break; } break; case 't': for (t = alltargets; !TARGET_ISEOT(*t); t++) if (!strcmp(t->name, optarg)) { add_target(t); break; } break; case 'i': input = 1; addr = msraddrbyname(optarg); optarg = strchr(optarg, '='); if (NULL == optarg) { fprintf(stderr, "missing value in -i argument!\n"); break; } if (!str2msr(++optarg, &msrval, NULL)) fprintf(stderr, "invalid value in -i argument!\n"); break; case 's': streamfn = optarg; break; case 'd': difffn = optarg; break; default: break; } /** cpuid is called after reading argv so that verbose is set */ const struct cpuid_t *id = cpuid(); printf_quiet("msrtool %s\n", VERSION); pacc = pci_alloc(); if (NULL == pacc) { fprintf(stderr, "Could not initialize PCI library! pci_alloc() failed.\n"); return 1; } pci_init(pacc); pci_scan_bus(pacc); if (!sys && !input && !listknown) for (sys = allsystems; !SYSTEM_ISEOT(*sys); sys++) { printf_verbose("Probing for system %s: %s\n", sys->name, sys->prettyname); if (!sys->probe(sys)) continue; printf_quiet("Detected system %s: %s\n", sys->name, sys->prettyname); break; } if (targets) for (tn = 0; tn < targets_found; tn++) printf_quiet("Forced target %s: %s\n", targets[tn]->name, targets[tn]->prettyname); else for (t = alltargets; !TARGET_ISEOT(*t); t++) { printf_verbose("Probing for target %s: %s\n", t->name, t->prettyname); if (!t->probe(t, id)) continue; printf_quiet("Detected target %s: %s\n", t->name, t->prettyname); add_target(t); } printf_quiet("\n"); fflush(stdout); if (listknown) { printf("Known systems:\n"); for (s = allsystems; s->name; s++) printf("%s: %s\n", s->name, s->prettyname); printf("\nKnown targets:\n"); for (t = alltargets; t->name; t++) { if (listmsrs && alltargets != t) printf("\n"); printf("%s: %s\n", t->name, t->prettyname); if (listmsrs) dumpmsrdefs(t); } printf("\n"); return 0; } if (!targets_found || !targets) { fprintf(stderr, "Unable to detect a known target; can not decode any MSRs! (Use -t to force)\n"); fprintf(stderr, "Please send a report or patch to coreboot@coreboot.org. Thanks for your help!\n"); fprintf(stderr, "\n"); return 1; } if (input) { decodemsr(cpu, addr, msrval); return 0; } if (listmsrs) { if (streamfn) return do_stream(streamfn, 1); for (tn = 0; tn < targets_found; tn++) { if (tn) printf("\n"); dumpmsrdefs(targets[tn]); } printf("\n"); return 0; } if (streamfn) return do_stream(streamfn, 0); if (difffn) { ret = do_diff(difffn); goto done; } if (optind == argc) { syntax(argv); printf("\nNo mode or address(es) specified!\n"); return 1; } if (!found_system()) return 1; if (!sys->open(cpu, SYS_RDONLY)) return 1; for (; optind < argc; optind++) { addr = msraddrbyname(argv[optind]); if (!sys->rdmsr(cpu, addr, &msrval)) break; decodemsr(cpu, addr, msrval); } ret = 0; done: sys->close(cpu); return ret; }