summaryrefslogtreecommitdiff
path: root/util/msrtool/msrtool.c
blob: 86fc2f971a812801dafb76830c86295f05fe39d4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
/*
 * This file is part of msrtool.
 *
 * Copyright (c) 2008 Peter Stuge <peter@stuge.se>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 */

#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 },
	{ 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;
		}

	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))
				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");
		goto done;
	}

	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;
}