Commit | Line | Data |
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3e135d88 PO |
1 | /* |
2 | * Intel CPU Microcode Update Driver for Linux | |
3 | * | |
4 | * Copyright (C) 2000-2006 Tigran Aivazian <tigran@aivazian.fsnet.co.uk> | |
5 | * 2006 Shaohua Li <shaohua.li@intel.com> | |
6 | * | |
7 | * This driver allows to upgrade microcode on Intel processors | |
8 | * belonging to IA-32 family - PentiumPro, Pentium II, | |
9 | * Pentium III, Xeon, Pentium 4, etc. | |
10 | * | |
11 | * Reference: Section 8.11 of Volume 3a, IA-32 Intel? Architecture | |
12 | * Software Developer's Manual | |
13 | * Order Number 253668 or free download from: | |
14 | * | |
50a23e6e | 15 | * http://developer.intel.com/Assets/PDF/manual/253668.pdf |
3e135d88 PO |
16 | * |
17 | * For more information, go to http://www.urbanmyth.org/microcode | |
18 | * | |
19 | * This program is free software; you can redistribute it and/or | |
20 | * modify it under the terms of the GNU General Public License | |
21 | * as published by the Free Software Foundation; either version | |
22 | * 2 of the License, or (at your option) any later version. | |
23 | * | |
24 | * 1.0 16 Feb 2000, Tigran Aivazian <tigran@sco.com> | |
25 | * Initial release. | |
26 | * 1.01 18 Feb 2000, Tigran Aivazian <tigran@sco.com> | |
27 | * Added read() support + cleanups. | |
28 | * 1.02 21 Feb 2000, Tigran Aivazian <tigran@sco.com> | |
29 | * Added 'device trimming' support. open(O_WRONLY) zeroes | |
30 | * and frees the saved copy of applied microcode. | |
31 | * 1.03 29 Feb 2000, Tigran Aivazian <tigran@sco.com> | |
32 | * Made to use devfs (/dev/cpu/microcode) + cleanups. | |
33 | * 1.04 06 Jun 2000, Simon Trimmer <simon@veritas.com> | |
34 | * Added misc device support (now uses both devfs and misc). | |
35 | * Added MICROCODE_IOCFREE ioctl to clear memory. | |
36 | * 1.05 09 Jun 2000, Simon Trimmer <simon@veritas.com> | |
37 | * Messages for error cases (non Intel & no suitable microcode). | |
38 | * 1.06 03 Aug 2000, Tigran Aivazian <tigran@veritas.com> | |
39 | * Removed ->release(). Removed exclusive open and status bitmap. | |
40 | * Added microcode_rwsem to serialize read()/write()/ioctl(). | |
41 | * Removed global kernel lock usage. | |
42 | * 1.07 07 Sep 2000, Tigran Aivazian <tigran@veritas.com> | |
43 | * Write 0 to 0x8B msr and then cpuid before reading revision, | |
44 | * so that it works even if there were no update done by the | |
45 | * BIOS. Otherwise, reading from 0x8B gives junk (which happened | |
46 | * to be 0 on my machine which is why it worked even when I | |
47 | * disabled update by the BIOS) | |
48 | * Thanks to Eric W. Biederman <ebiederman@lnxi.com> for the fix. | |
49 | * 1.08 11 Dec 2000, Richard Schaal <richard.schaal@intel.com> and | |
50 | * Tigran Aivazian <tigran@veritas.com> | |
51 | * Intel Pentium 4 processor support and bugfixes. | |
52 | * 1.09 30 Oct 2001, Tigran Aivazian <tigran@veritas.com> | |
53 | * Bugfix for HT (Hyper-Threading) enabled processors | |
54 | * whereby processor resources are shared by all logical processors | |
55 | * in a single CPU package. | |
56 | * 1.10 28 Feb 2002 Asit K Mallick <asit.k.mallick@intel.com> and | |
57 | * Tigran Aivazian <tigran@veritas.com>, | |
d33dcb9e PO |
58 | * Serialize updates as required on HT processors due to |
59 | * speculative nature of implementation. | |
3e135d88 PO |
60 | * 1.11 22 Mar 2002 Tigran Aivazian <tigran@veritas.com> |
61 | * Fix the panic when writing zero-length microcode chunk. | |
62 | * 1.12 29 Sep 2003 Nitin Kamble <nitin.a.kamble@intel.com>, | |
63 | * Jun Nakajima <jun.nakajima@intel.com> | |
64 | * Support for the microcode updates in the new format. | |
65 | * 1.13 10 Oct 2003 Tigran Aivazian <tigran@veritas.com> | |
66 | * Removed ->read() method and obsoleted MICROCODE_IOCFREE ioctl | |
67 | * because we no longer hold a copy of applied microcode | |
68 | * in kernel memory. | |
69 | * 1.14 25 Jun 2004 Tigran Aivazian <tigran@veritas.com> | |
70 | * Fix sigmatch() macro to handle old CPUs with pf == 0. | |
71 | * Thanks to Stuart Swales for pointing out this bug. | |
72 | */ | |
f58e1f53 JP |
73 | |
74 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
75 | ||
4bae1967 | 76 | #include <linux/platform_device.h> |
4bae1967 | 77 | #include <linux/miscdevice.h> |
871b72dd | 78 | #include <linux/capability.h> |
4bae1967 IM |
79 | #include <linux/kernel.h> |
80 | #include <linux/module.h> | |
3e135d88 PO |
81 | #include <linux/mutex.h> |
82 | #include <linux/cpu.h> | |
4bae1967 IM |
83 | #include <linux/fs.h> |
84 | #include <linux/mm.h> | |
f3c6ea1b | 85 | #include <linux/syscore_ops.h> |
3e135d88 | 86 | |
3e135d88 | 87 | #include <asm/microcode.h> |
4bae1967 | 88 | #include <asm/processor.h> |
3e135d88 PO |
89 | |
90 | MODULE_DESCRIPTION("Microcode Update Driver"); | |
91 | MODULE_AUTHOR("Tigran Aivazian <tigran@aivazian.fsnet.co.uk>"); | |
92 | MODULE_LICENSE("GPL"); | |
93 | ||
4bae1967 | 94 | #define MICROCODE_VERSION "2.00" |
3e135d88 | 95 | |
4bae1967 | 96 | static struct microcode_ops *microcode_ops; |
3e135d88 | 97 | |
871b72dd DA |
98 | /* |
99 | * Synchronization. | |
100 | * | |
101 | * All non cpu-hotplug-callback call sites use: | |
102 | * | |
103 | * - microcode_mutex to synchronize with each other; | |
104 | * - get/put_online_cpus() to synchronize with | |
105 | * the cpu-hotplug-callback call sites. | |
106 | * | |
107 | * We guarantee that only a single cpu is being | |
108 | * updated at any particular moment of time. | |
109 | */ | |
d45de409 | 110 | static DEFINE_MUTEX(microcode_mutex); |
3e135d88 | 111 | |
4bae1967 | 112 | struct ucode_cpu_info ucode_cpu_info[NR_CPUS]; |
8d86f390 | 113 | EXPORT_SYMBOL_GPL(ucode_cpu_info); |
3e135d88 | 114 | |
871b72dd DA |
115 | /* |
116 | * Operations that are run on a target cpu: | |
117 | */ | |
118 | ||
119 | struct cpu_info_ctx { | |
120 | struct cpu_signature *cpu_sig; | |
121 | int err; | |
122 | }; | |
123 | ||
124 | static void collect_cpu_info_local(void *arg) | |
125 | { | |
126 | struct cpu_info_ctx *ctx = arg; | |
127 | ||
128 | ctx->err = microcode_ops->collect_cpu_info(smp_processor_id(), | |
129 | ctx->cpu_sig); | |
130 | } | |
131 | ||
132 | static int collect_cpu_info_on_target(int cpu, struct cpu_signature *cpu_sig) | |
133 | { | |
134 | struct cpu_info_ctx ctx = { .cpu_sig = cpu_sig, .err = 0 }; | |
135 | int ret; | |
136 | ||
137 | ret = smp_call_function_single(cpu, collect_cpu_info_local, &ctx, 1); | |
138 | if (!ret) | |
139 | ret = ctx.err; | |
140 | ||
141 | return ret; | |
142 | } | |
143 | ||
144 | static int collect_cpu_info(int cpu) | |
145 | { | |
146 | struct ucode_cpu_info *uci = ucode_cpu_info + cpu; | |
147 | int ret; | |
148 | ||
149 | memset(uci, 0, sizeof(*uci)); | |
150 | ||
151 | ret = collect_cpu_info_on_target(cpu, &uci->cpu_sig); | |
152 | if (!ret) | |
153 | uci->valid = 1; | |
154 | ||
155 | return ret; | |
156 | } | |
157 | ||
158 | struct apply_microcode_ctx { | |
159 | int err; | |
160 | }; | |
161 | ||
162 | static void apply_microcode_local(void *arg) | |
163 | { | |
164 | struct apply_microcode_ctx *ctx = arg; | |
165 | ||
166 | ctx->err = microcode_ops->apply_microcode(smp_processor_id()); | |
167 | } | |
168 | ||
169 | static int apply_microcode_on_target(int cpu) | |
170 | { | |
171 | struct apply_microcode_ctx ctx = { .err = 0 }; | |
172 | int ret; | |
173 | ||
174 | ret = smp_call_function_single(cpu, apply_microcode_local, &ctx, 1); | |
175 | if (!ret) | |
176 | ret = ctx.err; | |
177 | ||
178 | return ret; | |
179 | } | |
180 | ||
3e135d88 | 181 | #ifdef CONFIG_MICROCODE_OLD_INTERFACE |
a0a29b62 | 182 | static int do_microcode_update(const void __user *buf, size_t size) |
3e135d88 | 183 | { |
3e135d88 | 184 | int error = 0; |
3e135d88 | 185 | int cpu; |
6f66cbc6 | 186 | |
a0a29b62 DA |
187 | for_each_online_cpu(cpu) { |
188 | struct ucode_cpu_info *uci = ucode_cpu_info + cpu; | |
871b72dd | 189 | enum ucode_state ustate; |
a0a29b62 DA |
190 | |
191 | if (!uci->valid) | |
192 | continue; | |
6f66cbc6 | 193 | |
871b72dd DA |
194 | ustate = microcode_ops->request_microcode_user(cpu, buf, size); |
195 | if (ustate == UCODE_ERROR) { | |
196 | error = -1; | |
197 | break; | |
198 | } else if (ustate == UCODE_OK) | |
199 | apply_microcode_on_target(cpu); | |
3e135d88 | 200 | } |
871b72dd | 201 | |
3e135d88 PO |
202 | return error; |
203 | } | |
204 | ||
3f10940e | 205 | static int microcode_open(struct inode *inode, struct file *file) |
3e135d88 | 206 | { |
3f10940e | 207 | return capable(CAP_SYS_RAWIO) ? nonseekable_open(inode, file) : -EPERM; |
3e135d88 PO |
208 | } |
209 | ||
d33dcb9e PO |
210 | static ssize_t microcode_write(struct file *file, const char __user *buf, |
211 | size_t len, loff_t *ppos) | |
3e135d88 | 212 | { |
871b72dd | 213 | ssize_t ret = -EINVAL; |
3e135d88 | 214 | |
4481374c | 215 | if ((len >> PAGE_SHIFT) > totalram_pages) { |
f58e1f53 | 216 | pr_err("too much data (max %ld pages)\n", totalram_pages); |
871b72dd | 217 | return ret; |
3e135d88 PO |
218 | } |
219 | ||
220 | get_online_cpus(); | |
221 | mutex_lock(µcode_mutex); | |
222 | ||
871b72dd | 223 | if (do_microcode_update(buf, len) == 0) |
3e135d88 PO |
224 | ret = (ssize_t)len; |
225 | ||
226 | mutex_unlock(µcode_mutex); | |
227 | put_online_cpus(); | |
228 | ||
229 | return ret; | |
230 | } | |
231 | ||
232 | static const struct file_operations microcode_fops = { | |
871b72dd DA |
233 | .owner = THIS_MODULE, |
234 | .write = microcode_write, | |
235 | .open = microcode_open, | |
6038f373 | 236 | .llseek = no_llseek, |
3e135d88 PO |
237 | }; |
238 | ||
239 | static struct miscdevice microcode_dev = { | |
871b72dd DA |
240 | .minor = MICROCODE_MINOR, |
241 | .name = "microcode", | |
e454cea2 | 242 | .nodename = "cpu/microcode", |
871b72dd | 243 | .fops = µcode_fops, |
3e135d88 PO |
244 | }; |
245 | ||
d33dcb9e | 246 | static int __init microcode_dev_init(void) |
3e135d88 PO |
247 | { |
248 | int error; | |
249 | ||
250 | error = misc_register(µcode_dev); | |
251 | if (error) { | |
f58e1f53 | 252 | pr_err("can't misc_register on minor=%d\n", MICROCODE_MINOR); |
3e135d88 PO |
253 | return error; |
254 | } | |
255 | ||
256 | return 0; | |
257 | } | |
258 | ||
bd399063 | 259 | static void __exit microcode_dev_exit(void) |
3e135d88 PO |
260 | { |
261 | misc_deregister(µcode_dev); | |
262 | } | |
263 | ||
264 | MODULE_ALIAS_MISCDEV(MICROCODE_MINOR); | |
578454ff | 265 | MODULE_ALIAS("devname:cpu/microcode"); |
3e135d88 | 266 | #else |
4bae1967 IM |
267 | #define microcode_dev_init() 0 |
268 | #define microcode_dev_exit() do { } while (0) | |
3e135d88 PO |
269 | #endif |
270 | ||
271 | /* fake device for request_firmware */ | |
4bae1967 | 272 | static struct platform_device *microcode_pdev; |
3e135d88 | 273 | |
871b72dd | 274 | static int reload_for_cpu(int cpu) |
af5c820a | 275 | { |
871b72dd | 276 | struct ucode_cpu_info *uci = ucode_cpu_info + cpu; |
af5c820a RR |
277 | int err = 0; |
278 | ||
279 | mutex_lock(µcode_mutex); | |
280 | if (uci->valid) { | |
871b72dd DA |
281 | enum ucode_state ustate; |
282 | ||
283 | ustate = microcode_ops->request_microcode_fw(cpu, µcode_pdev->dev); | |
284 | if (ustate == UCODE_OK) | |
285 | apply_microcode_on_target(cpu); | |
286 | else | |
287 | if (ustate == UCODE_ERROR) | |
288 | err = -EINVAL; | |
af5c820a RR |
289 | } |
290 | mutex_unlock(µcode_mutex); | |
871b72dd | 291 | |
af5c820a RR |
292 | return err; |
293 | } | |
294 | ||
3e135d88 PO |
295 | static ssize_t reload_store(struct sys_device *dev, |
296 | struct sysdev_attribute *attr, | |
871b72dd | 297 | const char *buf, size_t size) |
3e135d88 | 298 | { |
871b72dd | 299 | unsigned long val; |
3e135d88 | 300 | int cpu = dev->id; |
871b72dd DA |
301 | int ret = 0; |
302 | char *end; | |
3e135d88 | 303 | |
871b72dd | 304 | val = simple_strtoul(buf, &end, 0); |
3e135d88 PO |
305 | if (end == buf) |
306 | return -EINVAL; | |
871b72dd | 307 | |
3e135d88 | 308 | if (val == 1) { |
3e135d88 | 309 | get_online_cpus(); |
af5c820a | 310 | if (cpu_online(cpu)) |
871b72dd | 311 | ret = reload_for_cpu(cpu); |
3e135d88 | 312 | put_online_cpus(); |
3e135d88 | 313 | } |
871b72dd DA |
314 | |
315 | if (!ret) | |
316 | ret = size; | |
317 | ||
318 | return ret; | |
3e135d88 PO |
319 | } |
320 | ||
321 | static ssize_t version_show(struct sys_device *dev, | |
322 | struct sysdev_attribute *attr, char *buf) | |
323 | { | |
324 | struct ucode_cpu_info *uci = ucode_cpu_info + dev->id; | |
325 | ||
d45de409 | 326 | return sprintf(buf, "0x%x\n", uci->cpu_sig.rev); |
3e135d88 PO |
327 | } |
328 | ||
329 | static ssize_t pf_show(struct sys_device *dev, | |
330 | struct sysdev_attribute *attr, char *buf) | |
331 | { | |
332 | struct ucode_cpu_info *uci = ucode_cpu_info + dev->id; | |
333 | ||
d45de409 | 334 | return sprintf(buf, "0x%x\n", uci->cpu_sig.pf); |
3e135d88 PO |
335 | } |
336 | ||
337 | static SYSDEV_ATTR(reload, 0200, NULL, reload_store); | |
338 | static SYSDEV_ATTR(version, 0400, version_show, NULL); | |
339 | static SYSDEV_ATTR(processor_flags, 0400, pf_show, NULL); | |
340 | ||
341 | static struct attribute *mc_default_attrs[] = { | |
342 | &attr_reload.attr, | |
343 | &attr_version.attr, | |
344 | &attr_processor_flags.attr, | |
345 | NULL | |
346 | }; | |
347 | ||
348 | static struct attribute_group mc_attr_group = { | |
871b72dd DA |
349 | .attrs = mc_default_attrs, |
350 | .name = "microcode", | |
3e135d88 PO |
351 | }; |
352 | ||
871b72dd | 353 | static void microcode_fini_cpu(int cpu) |
d45de409 DA |
354 | { |
355 | struct ucode_cpu_info *uci = ucode_cpu_info + cpu; | |
356 | ||
d45de409 DA |
357 | microcode_ops->microcode_fini_cpu(cpu); |
358 | uci->valid = 0; | |
280a9ca5 DA |
359 | } |
360 | ||
871b72dd | 361 | static enum ucode_state microcode_resume_cpu(int cpu) |
d45de409 DA |
362 | { |
363 | struct ucode_cpu_info *uci = ucode_cpu_info + cpu; | |
364 | ||
871b72dd DA |
365 | if (!uci->mc) |
366 | return UCODE_NFOUND; | |
367 | ||
f58e1f53 | 368 | pr_debug("CPU%d updated upon resume\n", cpu); |
871b72dd DA |
369 | apply_microcode_on_target(cpu); |
370 | ||
371 | return UCODE_OK; | |
d45de409 DA |
372 | } |
373 | ||
871b72dd | 374 | static enum ucode_state microcode_init_cpu(int cpu) |
d45de409 | 375 | { |
871b72dd | 376 | enum ucode_state ustate; |
d45de409 | 377 | |
871b72dd DA |
378 | if (collect_cpu_info(cpu)) |
379 | return UCODE_ERROR; | |
d45de409 | 380 | |
871b72dd DA |
381 | /* --dimm. Trigger a delayed update? */ |
382 | if (system_state != SYSTEM_RUNNING) | |
383 | return UCODE_NFOUND; | |
d45de409 | 384 | |
871b72dd | 385 | ustate = microcode_ops->request_microcode_fw(cpu, µcode_pdev->dev); |
d45de409 | 386 | |
871b72dd | 387 | if (ustate == UCODE_OK) { |
f58e1f53 | 388 | pr_debug("CPU%d updated upon init\n", cpu); |
871b72dd | 389 | apply_microcode_on_target(cpu); |
d45de409 DA |
390 | } |
391 | ||
871b72dd | 392 | return ustate; |
d45de409 DA |
393 | } |
394 | ||
871b72dd | 395 | static enum ucode_state microcode_update_cpu(int cpu) |
d45de409 | 396 | { |
871b72dd DA |
397 | struct ucode_cpu_info *uci = ucode_cpu_info + cpu; |
398 | enum ucode_state ustate; | |
d45de409 | 399 | |
2f99f5c8 | 400 | if (uci->valid) |
871b72dd DA |
401 | ustate = microcode_resume_cpu(cpu); |
402 | else | |
403 | ustate = microcode_init_cpu(cpu); | |
d45de409 | 404 | |
871b72dd | 405 | return ustate; |
d45de409 DA |
406 | } |
407 | ||
408 | static int mc_sysdev_add(struct sys_device *sys_dev) | |
3e135d88 PO |
409 | { |
410 | int err, cpu = sys_dev->id; | |
3e135d88 PO |
411 | |
412 | if (!cpu_online(cpu)) | |
413 | return 0; | |
414 | ||
f58e1f53 | 415 | pr_debug("CPU%d added\n", cpu); |
3e135d88 PO |
416 | |
417 | err = sysfs_create_group(&sys_dev->kobj, &mc_attr_group); | |
418 | if (err) | |
419 | return err; | |
420 | ||
6c53cbfc BP |
421 | if (microcode_init_cpu(cpu) == UCODE_ERROR) { |
422 | sysfs_remove_group(&sys_dev->kobj, &mc_attr_group); | |
423 | return -EINVAL; | |
424 | } | |
af5c820a RR |
425 | |
426 | return err; | |
3e135d88 PO |
427 | } |
428 | ||
3e135d88 PO |
429 | static int mc_sysdev_remove(struct sys_device *sys_dev) |
430 | { | |
431 | int cpu = sys_dev->id; | |
432 | ||
433 | if (!cpu_online(cpu)) | |
434 | return 0; | |
435 | ||
f58e1f53 | 436 | pr_debug("CPU%d removed\n", cpu); |
d45de409 | 437 | microcode_fini_cpu(cpu); |
3e135d88 PO |
438 | sysfs_remove_group(&sys_dev->kobj, &mc_attr_group); |
439 | return 0; | |
440 | } | |
441 | ||
f3c6ea1b RW |
442 | static struct sysdev_driver mc_sysdev_driver = { |
443 | .add = mc_sysdev_add, | |
444 | .remove = mc_sysdev_remove, | |
445 | }; | |
446 | ||
447 | /** | |
448 | * mc_bp_resume - Update boot CPU microcode during resume. | |
449 | */ | |
450 | static void mc_bp_resume(void) | |
3e135d88 | 451 | { |
f3c6ea1b | 452 | int cpu = smp_processor_id(); |
871b72dd | 453 | struct ucode_cpu_info *uci = ucode_cpu_info + cpu; |
3e135d88 | 454 | |
871b72dd DA |
455 | if (uci->valid && uci->mc) |
456 | microcode_ops->apply_microcode(cpu); | |
3e135d88 PO |
457 | } |
458 | ||
f3c6ea1b RW |
459 | static struct syscore_ops mc_syscore_ops = { |
460 | .resume = mc_bp_resume, | |
3e135d88 PO |
461 | }; |
462 | ||
463 | static __cpuinit int | |
464 | mc_cpu_callback(struct notifier_block *nb, unsigned long action, void *hcpu) | |
465 | { | |
466 | unsigned int cpu = (unsigned long)hcpu; | |
467 | struct sys_device *sys_dev; | |
468 | ||
469 | sys_dev = get_cpu_sysdev(cpu); | |
470 | switch (action) { | |
3e135d88 | 471 | case CPU_ONLINE: |
3e135d88 | 472 | case CPU_ONLINE_FROZEN: |
871b72dd | 473 | microcode_update_cpu(cpu); |
d45de409 | 474 | case CPU_DOWN_FAILED: |
3e135d88 | 475 | case CPU_DOWN_FAILED_FROZEN: |
f58e1f53 | 476 | pr_debug("CPU%d added\n", cpu); |
3e135d88 | 477 | if (sysfs_create_group(&sys_dev->kobj, &mc_attr_group)) |
f58e1f53 | 478 | pr_err("Failed to create group for CPU%d\n", cpu); |
3e135d88 PO |
479 | break; |
480 | case CPU_DOWN_PREPARE: | |
3e135d88 PO |
481 | case CPU_DOWN_PREPARE_FROZEN: |
482 | /* Suspend is in progress, only remove the interface */ | |
483 | sysfs_remove_group(&sys_dev->kobj, &mc_attr_group); | |
f58e1f53 | 484 | pr_debug("CPU%d removed\n", cpu); |
d45de409 | 485 | break; |
70989449 SB |
486 | |
487 | /* | |
488 | * When a CPU goes offline, don't free up or invalidate the copy of | |
489 | * the microcode in kernel memory, so that we can reuse it when the | |
490 | * CPU comes back online without unnecessarily requesting the userspace | |
491 | * for it again. | |
492 | */ | |
d45de409 DA |
493 | case CPU_UP_CANCELED_FROZEN: |
494 | /* The CPU refused to come up during a system resume */ | |
495 | microcode_fini_cpu(cpu); | |
3e135d88 PO |
496 | break; |
497 | } | |
498 | return NOTIFY_OK; | |
499 | } | |
500 | ||
501 | static struct notifier_block __refdata mc_cpu_notifier = { | |
4bae1967 | 502 | .notifier_call = mc_cpu_callback, |
3e135d88 PO |
503 | }; |
504 | ||
18dbc916 | 505 | static int __init microcode_init(void) |
3e135d88 | 506 | { |
18dbc916 | 507 | struct cpuinfo_x86 *c = &cpu_data(0); |
3e135d88 PO |
508 | int error; |
509 | ||
18dbc916 DA |
510 | if (c->x86_vendor == X86_VENDOR_INTEL) |
511 | microcode_ops = init_intel_microcode(); | |
82b07865 | 512 | else if (c->x86_vendor == X86_VENDOR_AMD) |
18dbc916 | 513 | microcode_ops = init_amd_microcode(); |
8d86f390 | 514 | |
18dbc916 | 515 | if (!microcode_ops) { |
f58e1f53 | 516 | pr_err("no support for this CPU vendor\n"); |
18dbc916 DA |
517 | return -ENODEV; |
518 | } | |
3e135d88 | 519 | |
3e135d88 PO |
520 | microcode_pdev = platform_device_register_simple("microcode", -1, |
521 | NULL, 0); | |
bd399063 | 522 | if (IS_ERR(microcode_pdev)) |
3e135d88 | 523 | return PTR_ERR(microcode_pdev); |
3e135d88 PO |
524 | |
525 | get_online_cpus(); | |
871b72dd DA |
526 | mutex_lock(µcode_mutex); |
527 | ||
3e135d88 | 528 | error = sysdev_driver_register(&cpu_sysdev_class, &mc_sysdev_driver); |
871b72dd DA |
529 | |
530 | mutex_unlock(µcode_mutex); | |
3e135d88 | 531 | put_online_cpus(); |
871b72dd | 532 | |
bd399063 SB |
533 | if (error) |
534 | goto out_pdev; | |
3e135d88 | 535 | |
871b72dd DA |
536 | error = microcode_dev_init(); |
537 | if (error) | |
bd399063 | 538 | goto out_sysdev_driver; |
871b72dd | 539 | |
f3c6ea1b | 540 | register_syscore_ops(&mc_syscore_ops); |
3e135d88 | 541 | register_hotcpu_notifier(&mc_cpu_notifier); |
8d86f390 | 542 | |
871b72dd | 543 | pr_info("Microcode Update Driver: v" MICROCODE_VERSION |
f58e1f53 | 544 | " <tigran@aivazian.fsnet.co.uk>, Peter Oruba\n"); |
8d86f390 | 545 | |
3e135d88 | 546 | return 0; |
bd399063 SB |
547 | |
548 | out_sysdev_driver: | |
549 | get_online_cpus(); | |
550 | mutex_lock(µcode_mutex); | |
551 | ||
552 | sysdev_driver_unregister(&cpu_sysdev_class, &mc_sysdev_driver); | |
553 | ||
554 | mutex_unlock(µcode_mutex); | |
555 | put_online_cpus(); | |
556 | ||
557 | out_pdev: | |
558 | platform_device_unregister(microcode_pdev); | |
559 | return error; | |
560 | ||
3e135d88 | 561 | } |
871b72dd | 562 | module_init(microcode_init); |
3e135d88 | 563 | |
18dbc916 | 564 | static void __exit microcode_exit(void) |
3e135d88 PO |
565 | { |
566 | microcode_dev_exit(); | |
567 | ||
568 | unregister_hotcpu_notifier(&mc_cpu_notifier); | |
4ac5fc6a | 569 | unregister_syscore_ops(&mc_syscore_ops); |
3e135d88 PO |
570 | |
571 | get_online_cpus(); | |
871b72dd DA |
572 | mutex_lock(µcode_mutex); |
573 | ||
3e135d88 | 574 | sysdev_driver_unregister(&cpu_sysdev_class, &mc_sysdev_driver); |
871b72dd DA |
575 | |
576 | mutex_unlock(µcode_mutex); | |
3e135d88 PO |
577 | put_online_cpus(); |
578 | ||
579 | platform_device_unregister(microcode_pdev); | |
3e135d88 | 580 | |
8d86f390 PO |
581 | microcode_ops = NULL; |
582 | ||
871b72dd | 583 | pr_info("Microcode Update Driver: v" MICROCODE_VERSION " removed.\n"); |
8d86f390 | 584 | } |
18dbc916 | 585 | module_exit(microcode_exit); |