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