Loading...
Note: File does not exist in v4.6.
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Common functions for kernel modules using Dell SMBIOS
4 *
5 * Copyright (c) Red Hat <mjg@redhat.com>
6 * Copyright (c) 2014 Gabriele Mazzotta <gabriele.mzt@gmail.com>
7 * Copyright (c) 2014 Pali Rohár <pali@kernel.org>
8 *
9 * Based on documentation in the libsmbios package:
10 * Copyright (C) 2005-2014 Dell Inc.
11 */
12#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13
14#include <linux/container_of.h>
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/capability.h>
18#include <linux/dmi.h>
19#include <linux/err.h>
20#include <linux/mutex.h>
21#include <linux/platform_device.h>
22#include <linux/slab.h>
23#include "dell-smbios.h"
24
25static u32 da_supported_commands;
26static int da_num_tokens;
27static struct platform_device *platform_device;
28static struct calling_interface_token *da_tokens;
29static struct token_sysfs_data *token_entries;
30static struct attribute **token_attrs;
31static DEFINE_MUTEX(smbios_mutex);
32
33struct token_sysfs_data {
34 struct device_attribute location_attr;
35 struct device_attribute value_attr;
36 struct calling_interface_token *token;
37};
38
39struct smbios_device {
40 struct list_head list;
41 struct device *device;
42 int (*call_fn)(struct calling_interface_buffer *arg);
43};
44
45struct smbios_call {
46 u32 need_capability;
47 int cmd_class;
48 int cmd_select;
49};
50
51/* calls that are whitelisted for given capabilities */
52static struct smbios_call call_whitelist[] = {
53 /* generally tokens are allowed, but may be further filtered or
54 * restricted by token blacklist or whitelist
55 */
56 {CAP_SYS_ADMIN, CLASS_TOKEN_READ, SELECT_TOKEN_STD},
57 {CAP_SYS_ADMIN, CLASS_TOKEN_READ, SELECT_TOKEN_AC},
58 {CAP_SYS_ADMIN, CLASS_TOKEN_READ, SELECT_TOKEN_BAT},
59 {CAP_SYS_ADMIN, CLASS_TOKEN_WRITE, SELECT_TOKEN_STD},
60 {CAP_SYS_ADMIN, CLASS_TOKEN_WRITE, SELECT_TOKEN_AC},
61 {CAP_SYS_ADMIN, CLASS_TOKEN_WRITE, SELECT_TOKEN_BAT},
62 /* used by userspace: fwupdate */
63 {CAP_SYS_ADMIN, CLASS_ADMIN_PROP, SELECT_ADMIN_PROP},
64 /* used by userspace: fwupd */
65 {CAP_SYS_ADMIN, CLASS_INFO, SELECT_DOCK},
66 {CAP_SYS_ADMIN, CLASS_FLASH_INTERFACE, SELECT_FLASH_INTERFACE},
67};
68
69/* calls that are explicitly blacklisted */
70static struct smbios_call call_blacklist[] = {
71 {0x0000, 1, 7}, /* manufacturing use */
72 {0x0000, 6, 5}, /* manufacturing use */
73 {0x0000, 11, 3}, /* write once */
74 {0x0000, 11, 7}, /* write once */
75 {0x0000, 11, 11}, /* write once */
76 {0x0000, 19, -1}, /* diagnostics */
77 /* handled by kernel: dell-laptop */
78 {0x0000, CLASS_INFO, SELECT_RFKILL},
79 {0x0000, CLASS_KBD_BACKLIGHT, SELECT_KBD_BACKLIGHT},
80 {0x0000, CLASS_INFO, SELECT_THERMAL_MANAGEMENT},
81};
82
83struct token_range {
84 u32 need_capability;
85 u16 min;
86 u16 max;
87};
88
89/* tokens that are whitelisted for given capabilities */
90static struct token_range token_whitelist[] = {
91 /* used by userspace: fwupdate */
92 {CAP_SYS_ADMIN, CAPSULE_EN_TOKEN, CAPSULE_DIS_TOKEN},
93 /* can indicate to userspace that WMI is needed */
94 {0x0000, WSMT_EN_TOKEN, WSMT_DIS_TOKEN}
95};
96
97/* tokens that are explicitly blacklisted */
98static struct token_range token_blacklist[] = {
99 {0x0000, 0x0058, 0x0059}, /* ME use */
100 {0x0000, 0x00CD, 0x00D0}, /* raid shadow copy */
101 {0x0000, 0x013A, 0x01FF}, /* sata shadow copy */
102 {0x0000, 0x0175, 0x0176}, /* write once */
103 {0x0000, 0x0195, 0x0197}, /* diagnostics */
104 {0x0000, 0x01DC, 0x01DD}, /* manufacturing use */
105 {0x0000, 0x027D, 0x0284}, /* diagnostics */
106 {0x0000, 0x02E3, 0x02E3}, /* manufacturing use */
107 {0x0000, 0x02FF, 0x02FF}, /* manufacturing use */
108 {0x0000, 0x0300, 0x0302}, /* manufacturing use */
109 {0x0000, 0x0325, 0x0326}, /* manufacturing use */
110 {0x0000, 0x0332, 0x0335}, /* fan control */
111 {0x0000, 0x0350, 0x0350}, /* manufacturing use */
112 {0x0000, 0x0363, 0x0363}, /* manufacturing use */
113 {0x0000, 0x0368, 0x0368}, /* manufacturing use */
114 {0x0000, 0x03F6, 0x03F7}, /* manufacturing use */
115 {0x0000, 0x049E, 0x049F}, /* manufacturing use */
116 {0x0000, 0x04A0, 0x04A3}, /* disagnostics */
117 {0x0000, 0x04E6, 0x04E7}, /* manufacturing use */
118 {0x0000, 0x4000, 0x7FFF}, /* internal BIOS use */
119 {0x0000, 0x9000, 0x9001}, /* internal BIOS use */
120 {0x0000, 0xA000, 0xBFFF}, /* write only */
121 {0x0000, 0xEFF0, 0xEFFF}, /* internal BIOS use */
122 /* handled by kernel: dell-laptop */
123 {0x0000, BRIGHTNESS_TOKEN, BRIGHTNESS_TOKEN},
124 {0x0000, KBD_LED_OFF_TOKEN, KBD_LED_AUTO_TOKEN},
125 {0x0000, KBD_LED_AC_TOKEN, KBD_LED_AC_TOKEN},
126 {0x0000, KBD_LED_AUTO_25_TOKEN, KBD_LED_AUTO_75_TOKEN},
127 {0x0000, KBD_LED_AUTO_100_TOKEN, KBD_LED_AUTO_100_TOKEN},
128 {0x0000, GLOBAL_MIC_MUTE_ENABLE, GLOBAL_MIC_MUTE_DISABLE},
129};
130
131static LIST_HEAD(smbios_device_list);
132
133int dell_smbios_error(int value)
134{
135 switch (value) {
136 case 0: /* Completed successfully */
137 return 0;
138 case -1: /* Completed with error */
139 return -EIO;
140 case -2: /* Function not supported */
141 return -ENXIO;
142 default: /* Unknown error */
143 return -EINVAL;
144 }
145}
146EXPORT_SYMBOL_GPL(dell_smbios_error);
147
148int dell_smbios_register_device(struct device *d, void *call_fn)
149{
150 struct smbios_device *priv;
151
152 priv = devm_kzalloc(d, sizeof(struct smbios_device), GFP_KERNEL);
153 if (!priv)
154 return -ENOMEM;
155 get_device(d);
156 priv->device = d;
157 priv->call_fn = call_fn;
158 mutex_lock(&smbios_mutex);
159 list_add_tail(&priv->list, &smbios_device_list);
160 mutex_unlock(&smbios_mutex);
161 dev_dbg(d, "Added device: %s\n", d->driver->name);
162 return 0;
163}
164EXPORT_SYMBOL_GPL(dell_smbios_register_device);
165
166void dell_smbios_unregister_device(struct device *d)
167{
168 struct smbios_device *priv;
169
170 mutex_lock(&smbios_mutex);
171 list_for_each_entry(priv, &smbios_device_list, list) {
172 if (priv->device == d) {
173 list_del(&priv->list);
174 put_device(d);
175 break;
176 }
177 }
178 mutex_unlock(&smbios_mutex);
179 dev_dbg(d, "Remove device: %s\n", d->driver->name);
180}
181EXPORT_SYMBOL_GPL(dell_smbios_unregister_device);
182
183int dell_smbios_call_filter(struct device *d,
184 struct calling_interface_buffer *buffer)
185{
186 u16 t = 0;
187 int i;
188
189 /* can't make calls over 30 */
190 if (buffer->cmd_class > 30) {
191 dev_dbg(d, "class too big: %u\n", buffer->cmd_class);
192 return -EINVAL;
193 }
194
195 /* supported calls on the particular system */
196 if (!(da_supported_commands & (1 << buffer->cmd_class))) {
197 dev_dbg(d, "invalid command, supported commands: 0x%8x\n",
198 da_supported_commands);
199 return -EINVAL;
200 }
201
202 /* match against call blacklist */
203 for (i = 0; i < ARRAY_SIZE(call_blacklist); i++) {
204 if (buffer->cmd_class != call_blacklist[i].cmd_class)
205 continue;
206 if (buffer->cmd_select != call_blacklist[i].cmd_select &&
207 call_blacklist[i].cmd_select != -1)
208 continue;
209 dev_dbg(d, "blacklisted command: %u/%u\n",
210 buffer->cmd_class, buffer->cmd_select);
211 return -EINVAL;
212 }
213
214 /* if a token call, find token ID */
215
216 if ((buffer->cmd_class == CLASS_TOKEN_READ ||
217 buffer->cmd_class == CLASS_TOKEN_WRITE) &&
218 buffer->cmd_select < 3) {
219 /* tokens enabled ? */
220 if (!da_tokens) {
221 dev_dbg(d, "no token support on this system\n");
222 return -EINVAL;
223 }
224
225 /* find the matching token ID */
226 for (i = 0; i < da_num_tokens; i++) {
227 if (da_tokens[i].location != buffer->input[0])
228 continue;
229 t = da_tokens[i].tokenID;
230 break;
231 }
232
233 /* token call; but token didn't exist */
234 if (!t) {
235 dev_dbg(d, "token at location %04x doesn't exist\n",
236 buffer->input[0]);
237 return -EINVAL;
238 }
239
240 /* match against token blacklist */
241 for (i = 0; i < ARRAY_SIZE(token_blacklist); i++) {
242 if (!token_blacklist[i].min || !token_blacklist[i].max)
243 continue;
244 if (t >= token_blacklist[i].min &&
245 t <= token_blacklist[i].max)
246 return -EINVAL;
247 }
248
249 /* match against token whitelist */
250 for (i = 0; i < ARRAY_SIZE(token_whitelist); i++) {
251 if (!token_whitelist[i].min || !token_whitelist[i].max)
252 continue;
253 if (t < token_whitelist[i].min ||
254 t > token_whitelist[i].max)
255 continue;
256 if (!token_whitelist[i].need_capability ||
257 capable(token_whitelist[i].need_capability)) {
258 dev_dbg(d, "whitelisted token: %x\n", t);
259 return 0;
260 }
261
262 }
263 }
264 /* match against call whitelist */
265 for (i = 0; i < ARRAY_SIZE(call_whitelist); i++) {
266 if (buffer->cmd_class != call_whitelist[i].cmd_class)
267 continue;
268 if (buffer->cmd_select != call_whitelist[i].cmd_select)
269 continue;
270 if (!call_whitelist[i].need_capability ||
271 capable(call_whitelist[i].need_capability)) {
272 dev_dbg(d, "whitelisted capable command: %u/%u\n",
273 buffer->cmd_class, buffer->cmd_select);
274 return 0;
275 }
276 dev_dbg(d, "missing capability %d for %u/%u\n",
277 call_whitelist[i].need_capability,
278 buffer->cmd_class, buffer->cmd_select);
279
280 }
281
282 /* not in a whitelist, only allow processes with capabilities */
283 if (capable(CAP_SYS_RAWIO)) {
284 dev_dbg(d, "Allowing %u/%u due to CAP_SYS_RAWIO\n",
285 buffer->cmd_class, buffer->cmd_select);
286 return 0;
287 }
288
289 return -EACCES;
290}
291EXPORT_SYMBOL_GPL(dell_smbios_call_filter);
292
293int dell_smbios_call(struct calling_interface_buffer *buffer)
294{
295 int (*call_fn)(struct calling_interface_buffer *) = NULL;
296 struct device *selected_dev = NULL;
297 struct smbios_device *priv;
298 int ret;
299
300 mutex_lock(&smbios_mutex);
301 list_for_each_entry(priv, &smbios_device_list, list) {
302 if (!selected_dev || priv->device->id >= selected_dev->id) {
303 dev_dbg(priv->device, "Trying device ID: %d\n",
304 priv->device->id);
305 call_fn = priv->call_fn;
306 selected_dev = priv->device;
307 }
308 }
309
310 if (!selected_dev) {
311 ret = -ENODEV;
312 pr_err("No dell-smbios drivers are loaded\n");
313 goto out_smbios_call;
314 }
315
316 ret = call_fn(buffer);
317
318out_smbios_call:
319 mutex_unlock(&smbios_mutex);
320 return ret;
321}
322EXPORT_SYMBOL_GPL(dell_smbios_call);
323
324void dell_fill_request(struct calling_interface_buffer *buffer,
325 u32 arg0, u32 arg1, u32 arg2, u32 arg3)
326{
327 memset(buffer, 0, sizeof(struct calling_interface_buffer));
328 buffer->input[0] = arg0;
329 buffer->input[1] = arg1;
330 buffer->input[2] = arg2;
331 buffer->input[3] = arg3;
332}
333EXPORT_SYMBOL_GPL(dell_fill_request);
334
335int dell_send_request(struct calling_interface_buffer *buffer,
336 u16 class, u16 select)
337{
338 int ret;
339
340 buffer->cmd_class = class;
341 buffer->cmd_select = select;
342 ret = dell_smbios_call(buffer);
343 if (ret != 0)
344 return ret;
345 return dell_smbios_error(buffer->output[0]);
346}
347EXPORT_SYMBOL_GPL(dell_send_request);
348
349struct calling_interface_token *dell_smbios_find_token(int tokenid)
350{
351 int i;
352
353 if (!da_tokens)
354 return NULL;
355
356 for (i = 0; i < da_num_tokens; i++) {
357 if (da_tokens[i].tokenID == tokenid)
358 return &da_tokens[i];
359 }
360
361 return NULL;
362}
363EXPORT_SYMBOL_GPL(dell_smbios_find_token);
364
365static BLOCKING_NOTIFIER_HEAD(dell_laptop_chain_head);
366
367int dell_laptop_register_notifier(struct notifier_block *nb)
368{
369 return blocking_notifier_chain_register(&dell_laptop_chain_head, nb);
370}
371EXPORT_SYMBOL_GPL(dell_laptop_register_notifier);
372
373int dell_laptop_unregister_notifier(struct notifier_block *nb)
374{
375 return blocking_notifier_chain_unregister(&dell_laptop_chain_head, nb);
376}
377EXPORT_SYMBOL_GPL(dell_laptop_unregister_notifier);
378
379void dell_laptop_call_notifier(unsigned long action, void *data)
380{
381 blocking_notifier_call_chain(&dell_laptop_chain_head, action, data);
382}
383EXPORT_SYMBOL_GPL(dell_laptop_call_notifier);
384
385bool dell_smbios_class_is_supported(u16 class)
386{
387 /* Classes over 30 always unsupported */
388 if (class > 30)
389 return false;
390 return da_supported_commands & (1 << class);
391}
392EXPORT_SYMBOL_GPL(dell_smbios_class_is_supported);
393
394static void __init parse_da_table(const struct dmi_header *dm)
395{
396 /* Final token is a terminator, so we don't want to copy it */
397 int tokens = (dm->length-11)/sizeof(struct calling_interface_token)-1;
398 struct calling_interface_token *new_da_tokens;
399 struct calling_interface_structure *table =
400 container_of(dm, struct calling_interface_structure, header);
401
402 /*
403 * 4 bytes of table header, plus 7 bytes of Dell header
404 * plus at least 6 bytes of entry
405 */
406
407 if (dm->length < 17)
408 return;
409
410 da_supported_commands = table->supportedCmds;
411
412 new_da_tokens = krealloc(da_tokens, (da_num_tokens + tokens) *
413 sizeof(struct calling_interface_token),
414 GFP_KERNEL);
415
416 if (!new_da_tokens)
417 return;
418 da_tokens = new_da_tokens;
419
420 memcpy(da_tokens+da_num_tokens, table->tokens,
421 sizeof(struct calling_interface_token) * tokens);
422
423 da_num_tokens += tokens;
424}
425
426static void zero_duplicates(struct device *dev)
427{
428 int i, j;
429
430 for (i = 0; i < da_num_tokens; i++) {
431 if (da_tokens[i].tokenID == 0)
432 continue;
433 for (j = i+1; j < da_num_tokens; j++) {
434 if (da_tokens[j].tokenID == 0)
435 continue;
436 if (da_tokens[i].tokenID == da_tokens[j].tokenID) {
437 dev_dbg(dev, "Zeroing dup token ID %x(%x/%x)\n",
438 da_tokens[j].tokenID,
439 da_tokens[j].location,
440 da_tokens[j].value);
441 da_tokens[j].tokenID = 0;
442 }
443 }
444 }
445}
446
447static void __init find_tokens(const struct dmi_header *dm, void *dummy)
448{
449 switch (dm->type) {
450 case 0xd4: /* Indexed IO */
451 case 0xd5: /* Protected Area Type 1 */
452 case 0xd6: /* Protected Area Type 2 */
453 break;
454 case 0xda: /* Calling interface */
455 parse_da_table(dm);
456 break;
457 }
458}
459
460static ssize_t location_show(struct device *dev,
461 struct device_attribute *attr, char *buf)
462{
463 struct token_sysfs_data *data = container_of(attr, struct token_sysfs_data, location_attr);
464
465 if (!capable(CAP_SYS_ADMIN))
466 return -EPERM;
467
468 return sysfs_emit(buf, "%08x", data->token->location);
469}
470
471static ssize_t value_show(struct device *dev,
472 struct device_attribute *attr, char *buf)
473{
474 struct token_sysfs_data *data = container_of(attr, struct token_sysfs_data, value_attr);
475
476 if (!capable(CAP_SYS_ADMIN))
477 return -EPERM;
478
479 return sysfs_emit(buf, "%08x", data->token->value);
480}
481
482static struct attribute_group smbios_attribute_group = {
483 .name = "tokens"
484};
485
486static struct platform_driver platform_driver = {
487 .driver = {
488 .name = "dell-smbios",
489 },
490};
491
492static int build_tokens_sysfs(struct platform_device *dev)
493{
494 char *location_name;
495 char *value_name;
496 int ret;
497 int i, j;
498
499 token_entries = kcalloc(da_num_tokens, sizeof(*token_entries), GFP_KERNEL);
500 if (!token_entries)
501 return -ENOMEM;
502
503 /* need to store both location and value + terminator*/
504 token_attrs = kcalloc((2 * da_num_tokens) + 1, sizeof(*token_attrs), GFP_KERNEL);
505 if (!token_attrs)
506 goto out_allocate_attrs;
507
508 for (i = 0, j = 0; i < da_num_tokens; i++) {
509 /* skip empty */
510 if (da_tokens[i].tokenID == 0)
511 continue;
512
513 token_entries[i].token = &da_tokens[i];
514
515 /* add location */
516 location_name = kasprintf(GFP_KERNEL, "%04x_location",
517 da_tokens[i].tokenID);
518 if (location_name == NULL)
519 goto out_unwind_strings;
520
521 sysfs_attr_init(&token_entries[i].location_attr.attr);
522 token_entries[i].location_attr.attr.name = location_name;
523 token_entries[i].location_attr.attr.mode = 0444;
524 token_entries[i].location_attr.show = location_show;
525 token_attrs[j++] = &token_entries[i].location_attr.attr;
526
527 /* add value */
528 value_name = kasprintf(GFP_KERNEL, "%04x_value",
529 da_tokens[i].tokenID);
530 if (!value_name) {
531 kfree(location_name);
532 goto out_unwind_strings;
533 }
534
535 sysfs_attr_init(&token_entries[i].value_attr.attr);
536 token_entries[i].value_attr.attr.name = value_name;
537 token_entries[i].value_attr.attr.mode = 0444;
538 token_entries[i].value_attr.show = value_show;
539 token_attrs[j++] = &token_entries[i].value_attr.attr;
540 }
541 smbios_attribute_group.attrs = token_attrs;
542
543 ret = sysfs_create_group(&dev->dev.kobj, &smbios_attribute_group);
544 if (ret)
545 goto out_unwind_strings;
546 return 0;
547
548out_unwind_strings:
549 while (i--) {
550 kfree(token_entries[i].location_attr.attr.name);
551 kfree(token_entries[i].value_attr.attr.name);
552 }
553 kfree(token_attrs);
554out_allocate_attrs:
555 kfree(token_entries);
556
557 return -ENOMEM;
558}
559
560static void free_group(struct platform_device *pdev)
561{
562 int i;
563
564 sysfs_remove_group(&pdev->dev.kobj,
565 &smbios_attribute_group);
566 for (i = 0; i < da_num_tokens; i++) {
567 kfree(token_entries[i].location_attr.attr.name);
568 kfree(token_entries[i].value_attr.attr.name);
569 }
570 kfree(token_attrs);
571 kfree(token_entries);
572}
573
574static int __init dell_smbios_init(void)
575{
576 int ret, wmi, smm;
577
578 if (!dmi_find_device(DMI_DEV_TYPE_OEM_STRING, "Dell System", NULL) &&
579 !dmi_find_device(DMI_DEV_TYPE_OEM_STRING, "Alienware", NULL) &&
580 !dmi_find_device(DMI_DEV_TYPE_OEM_STRING, "www.dell.com", NULL)) {
581 pr_err("Unable to run on non-Dell system\n");
582 return -ENODEV;
583 }
584
585 dmi_walk(find_tokens, NULL);
586
587 ret = platform_driver_register(&platform_driver);
588 if (ret)
589 goto fail_platform_driver;
590
591 platform_device = platform_device_alloc("dell-smbios", 0);
592 if (!platform_device) {
593 ret = -ENOMEM;
594 goto fail_platform_device_alloc;
595 }
596 ret = platform_device_add(platform_device);
597 if (ret)
598 goto fail_platform_device_add;
599
600 /* register backends */
601 wmi = init_dell_smbios_wmi();
602 if (wmi)
603 pr_debug("Failed to initialize WMI backend: %d\n", wmi);
604 smm = init_dell_smbios_smm();
605 if (smm)
606 pr_debug("Failed to initialize SMM backend: %d\n", smm);
607 if (wmi && smm) {
608 pr_err("No SMBIOS backends available (wmi: %d, smm: %d)\n",
609 wmi, smm);
610 ret = -ENODEV;
611 goto fail_create_group;
612 }
613
614 if (da_tokens) {
615 /* duplicate tokens will cause problems building sysfs files */
616 zero_duplicates(&platform_device->dev);
617
618 ret = build_tokens_sysfs(platform_device);
619 if (ret)
620 goto fail_sysfs;
621 }
622
623 return 0;
624
625fail_sysfs:
626 if (!wmi)
627 exit_dell_smbios_wmi();
628 if (!smm)
629 exit_dell_smbios_smm();
630
631fail_create_group:
632 platform_device_del(platform_device);
633
634fail_platform_device_add:
635 platform_device_put(platform_device);
636
637fail_platform_device_alloc:
638 platform_driver_unregister(&platform_driver);
639
640fail_platform_driver:
641 kfree(da_tokens);
642 return ret;
643}
644
645static void __exit dell_smbios_exit(void)
646{
647 exit_dell_smbios_wmi();
648 exit_dell_smbios_smm();
649 mutex_lock(&smbios_mutex);
650 if (platform_device) {
651 if (da_tokens)
652 free_group(platform_device);
653 platform_device_unregister(platform_device);
654 platform_driver_unregister(&platform_driver);
655 }
656 kfree(da_tokens);
657 mutex_unlock(&smbios_mutex);
658}
659
660module_init(dell_smbios_init);
661module_exit(dell_smbios_exit);
662
663MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
664MODULE_AUTHOR("Gabriele Mazzotta <gabriele.mzt@gmail.com>");
665MODULE_AUTHOR("Pali Rohár <pali@kernel.org>");
666MODULE_AUTHOR("Mario Limonciello <mario.limonciello@outlook.com>");
667MODULE_DESCRIPTION("Common functions for kernel modules using Dell SMBIOS");
668MODULE_LICENSE("GPL");