Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Intel CPU Microcode Update Driver for Linux | |
3 | * | |
69688262 | 4 | * Copyright (C) 2000-2006 Tigran Aivazian <tigran@aivazian.fsnet.co.uk> |
9a3110bf | 5 | * 2006 Shaohua Li <shaohua.li@intel.com> |
1da177e4 LT |
6 | * |
7 | * This driver allows to upgrade microcode on Intel processors | |
bc4e0f9a | 8 | * belonging to IA-32 family - PentiumPro, Pentium II, |
1da177e4 LT |
9 | * Pentium III, Xeon, Pentium 4, etc. |
10 | * | |
bc4e0f9a BC |
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 | * | |
15 | * http://developer.intel.com/design/pentium4/manuals/253668.htm | |
1da177e4 LT |
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>, | |
f516526f PO |
58 | * Serialize updates as required on HT processors due to |
59 | * speculative nature of implementation. | |
1da177e4 LT |
60 | * 1.11 22 Mar 2002 Tigran Aivazian <tigran@veritas.com> |
61 | * Fix the panic when writing zero-length microcode chunk. | |
bc4e0f9a | 62 | * 1.12 29 Sep 2003 Nitin Kamble <nitin.a.kamble@intel.com>, |
1da177e4 LT |
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 | |
bc4e0f9a | 67 | * because we no longer hold a copy of applied microcode |
1da177e4 LT |
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 | */ | |
a9415644 | 73 | #include <linux/capability.h> |
1da177e4 LT |
74 | #include <linux/kernel.h> |
75 | #include <linux/init.h> | |
76 | #include <linux/sched.h> | |
77149367 | 77 | #include <linux/smp_lock.h> |
5cf6c541 | 78 | #include <linux/cpumask.h> |
1da177e4 LT |
79 | #include <linux/module.h> |
80 | #include <linux/slab.h> | |
81 | #include <linux/vmalloc.h> | |
82 | #include <linux/miscdevice.h> | |
83 | #include <linux/spinlock.h> | |
84 | #include <linux/mm.h> | |
4e950f6f | 85 | #include <linux/fs.h> |
14cc3e2b | 86 | #include <linux/mutex.h> |
a30a6a2c SL |
87 | #include <linux/cpu.h> |
88 | #include <linux/firmware.h> | |
89 | #include <linux/platform_device.h> | |
1da177e4 LT |
90 | |
91 | #include <asm/msr.h> | |
92 | #include <asm/uaccess.h> | |
93 | #include <asm/processor.h> | |
9a56a0f8 | 94 | #include <asm/microcode.h> |
1da177e4 | 95 | |
3e135d88 | 96 | MODULE_DESCRIPTION("Microcode Update Driver"); |
69688262 | 97 | MODULE_AUTHOR("Tigran Aivazian <tigran@aivazian.fsnet.co.uk>"); |
1da177e4 LT |
98 | MODULE_LICENSE("GPL"); |
99 | ||
18dbc916 DA |
100 | struct microcode_header_intel { |
101 | unsigned int hdrver; | |
102 | unsigned int rev; | |
103 | unsigned int date; | |
104 | unsigned int sig; | |
105 | unsigned int cksum; | |
106 | unsigned int ldrver; | |
107 | unsigned int pf; | |
108 | unsigned int datasize; | |
109 | unsigned int totalsize; | |
110 | unsigned int reserved[3]; | |
111 | }; | |
112 | ||
113 | struct microcode_intel { | |
114 | struct microcode_header_intel hdr; | |
115 | unsigned int bits[0]; | |
116 | }; | |
117 | ||
118 | /* microcode format is extended from prescott processors */ | |
119 | struct extended_signature { | |
120 | unsigned int sig; | |
121 | unsigned int pf; | |
122 | unsigned int cksum; | |
123 | }; | |
124 | ||
125 | struct extended_sigtable { | |
126 | unsigned int count; | |
127 | unsigned int cksum; | |
128 | unsigned int reserved[3]; | |
129 | struct extended_signature sigs[0]; | |
130 | }; | |
131 | ||
f516526f PO |
132 | #define DEFAULT_UCODE_DATASIZE (2000) |
133 | #define MC_HEADER_SIZE (sizeof(struct microcode_header_intel)) | |
134 | #define DEFAULT_UCODE_TOTALSIZE (DEFAULT_UCODE_DATASIZE + MC_HEADER_SIZE) | |
135 | #define EXT_HEADER_SIZE (sizeof(struct extended_sigtable)) | |
136 | #define EXT_SIGNATURE_SIZE (sizeof(struct extended_signature)) | |
3e135d88 | 137 | #define DWSIZE (sizeof(u32)) |
1da177e4 | 138 | #define get_totalsize(mc) \ |
d4ee3668 PO |
139 | (((struct microcode_intel *)mc)->hdr.totalsize ? \ |
140 | ((struct microcode_intel *)mc)->hdr.totalsize : \ | |
141 | DEFAULT_UCODE_TOTALSIZE) | |
142 | ||
1da177e4 | 143 | #define get_datasize(mc) \ |
d4ee3668 PO |
144 | (((struct microcode_intel *)mc)->hdr.datasize ? \ |
145 | ((struct microcode_intel *)mc)->hdr.datasize : DEFAULT_UCODE_DATASIZE) | |
1da177e4 LT |
146 | |
147 | #define sigmatch(s1, s2, p1, p2) \ | |
148 | (((s1) == (s2)) && (((p1) & (p2)) || (((p1) == 0) && ((p2) == 0)))) | |
149 | ||
150 | #define exttable_size(et) ((et)->count * EXT_SIGNATURE_SIZE + EXT_HEADER_SIZE) | |
151 | ||
152 | /* serialize access to the physical write to MSR 0x79 */ | |
153 | static DEFINE_SPINLOCK(microcode_update_lock); | |
154 | ||
d45de409 | 155 | static int collect_cpu_info(int cpu_num, struct cpu_signature *csig) |
1da177e4 | 156 | { |
92cb7612 | 157 | struct cpuinfo_x86 *c = &cpu_data(cpu_num); |
280a9ca5 | 158 | unsigned long flags; |
1da177e4 LT |
159 | unsigned int val[2]; |
160 | ||
d45de409 | 161 | memset(csig, 0, sizeof(*csig)); |
1da177e4 LT |
162 | |
163 | if (c->x86_vendor != X86_VENDOR_INTEL || c->x86 < 6 || | |
3e135d88 | 164 | cpu_has(c, X86_FEATURE_IA64)) { |
9a3110bf SL |
165 | printk(KERN_ERR "microcode: CPU%d not a capable Intel " |
166 | "processor\n", cpu_num); | |
d45de409 | 167 | return -1; |
9a3110bf | 168 | } |
1da177e4 | 169 | |
d45de409 | 170 | csig->sig = cpuid_eax(0x00000001); |
9a3110bf SL |
171 | |
172 | if ((c->x86_model >= 5) || (c->x86 > 6)) { | |
173 | /* get processor flags from MSR 0x17 */ | |
174 | rdmsr(MSR_IA32_PLATFORM_ID, val[0], val[1]); | |
d45de409 | 175 | csig->pf = 1 << ((val[1] >> 18) & 7); |
1da177e4 LT |
176 | } |
177 | ||
280a9ca5 DA |
178 | /* serialize access to the physical write to MSR 0x79 */ |
179 | spin_lock_irqsave(µcode_update_lock, flags); | |
180 | ||
1da177e4 | 181 | wrmsr(MSR_IA32_UCODE_REV, 0, 0); |
245067d1 | 182 | /* see notes above for revision 1.07. Apparent chip bug */ |
487472bc | 183 | sync_core(); |
1da177e4 | 184 | /* get the current revision from MSR 0x8B */ |
d45de409 | 185 | rdmsr(MSR_IA32_UCODE_REV, val[0], csig->rev); |
280a9ca5 DA |
186 | spin_unlock_irqrestore(µcode_update_lock, flags); |
187 | ||
1da177e4 | 188 | pr_debug("microcode: collect_cpu_info : sig=0x%x, pf=0x%x, rev=0x%x\n", |
d45de409 DA |
189 | csig->sig, csig->pf, csig->rev); |
190 | ||
191 | return 0; | |
1da177e4 LT |
192 | } |
193 | ||
a0a29b62 | 194 | static inline int update_match_cpu(struct cpu_signature *csig, int sig, int pf) |
1da177e4 | 195 | { |
a0a29b62 DA |
196 | return (!sigmatch(sig, csig->sig, pf, csig->pf)) ? 0 : 1; |
197 | } | |
1da177e4 | 198 | |
a0a29b62 DA |
199 | static inline int |
200 | update_match_revision(struct microcode_header_intel *mc_header, int rev) | |
201 | { | |
202 | return (mc_header->rev <= rev) ? 0 : 1; | |
1da177e4 LT |
203 | } |
204 | ||
8d86f390 | 205 | static int microcode_sanity_check(void *mc) |
1da177e4 | 206 | { |
d4ee3668 | 207 | struct microcode_header_intel *mc_header = mc; |
9a3110bf SL |
208 | struct extended_sigtable *ext_header = NULL; |
209 | struct extended_signature *ext_sig; | |
210 | unsigned long total_size, data_size, ext_table_size; | |
211 | int sum, orig_sum, ext_sigcount = 0, i; | |
212 | ||
213 | total_size = get_totalsize(mc_header); | |
214 | data_size = get_datasize(mc_header); | |
bd8e39f9 | 215 | if (data_size + MC_HEADER_SIZE > total_size) { |
9a3110bf SL |
216 | printk(KERN_ERR "microcode: error! " |
217 | "Bad data size in microcode data file\n"); | |
218 | return -EINVAL; | |
219 | } | |
1da177e4 | 220 | |
9a3110bf SL |
221 | if (mc_header->ldrver != 1 || mc_header->hdrver != 1) { |
222 | printk(KERN_ERR "microcode: error! " | |
223 | "Unknown microcode update format\n"); | |
224 | return -EINVAL; | |
225 | } | |
226 | ext_table_size = total_size - (MC_HEADER_SIZE + data_size); | |
227 | if (ext_table_size) { | |
228 | if ((ext_table_size < EXT_HEADER_SIZE) | |
229 | || ((ext_table_size - EXT_HEADER_SIZE) % EXT_SIGNATURE_SIZE)) { | |
230 | printk(KERN_ERR "microcode: error! " | |
231 | "Small exttable size in microcode data file\n"); | |
232 | return -EINVAL; | |
1da177e4 | 233 | } |
9a3110bf SL |
234 | ext_header = mc + MC_HEADER_SIZE + data_size; |
235 | if (ext_table_size != exttable_size(ext_header)) { | |
236 | printk(KERN_ERR "microcode: error! " | |
237 | "Bad exttable size in microcode data file\n"); | |
238 | return -EFAULT; | |
1da177e4 | 239 | } |
9a3110bf SL |
240 | ext_sigcount = ext_header->count; |
241 | } | |
1da177e4 | 242 | |
9a3110bf SL |
243 | /* check extended table checksum */ |
244 | if (ext_table_size) { | |
245 | int ext_table_sum = 0; | |
9a4b9efa | 246 | int *ext_tablep = (int *)ext_header; |
9a3110bf SL |
247 | |
248 | i = ext_table_size / DWSIZE; | |
249 | while (i--) | |
250 | ext_table_sum += ext_tablep[i]; | |
251 | if (ext_table_sum) { | |
252 | printk(KERN_WARNING "microcode: aborting, " | |
253 | "bad extended signature table checksum\n"); | |
254 | return -EINVAL; | |
1da177e4 | 255 | } |
9a3110bf | 256 | } |
1da177e4 | 257 | |
9a3110bf SL |
258 | /* calculate the checksum */ |
259 | orig_sum = 0; | |
260 | i = (MC_HEADER_SIZE + data_size) / DWSIZE; | |
261 | while (i--) | |
262 | orig_sum += ((int *)mc)[i]; | |
263 | if (orig_sum) { | |
264 | printk(KERN_ERR "microcode: aborting, bad checksum\n"); | |
265 | return -EINVAL; | |
266 | } | |
267 | if (!ext_table_size) | |
268 | return 0; | |
269 | /* check extended signature checksum */ | |
270 | for (i = 0; i < ext_sigcount; i++) { | |
ade1af77 JE |
271 | ext_sig = (void *)ext_header + EXT_HEADER_SIZE + |
272 | EXT_SIGNATURE_SIZE * i; | |
9a3110bf SL |
273 | sum = orig_sum |
274 | - (mc_header->sig + mc_header->pf + mc_header->cksum) | |
275 | + (ext_sig->sig + ext_sig->pf + ext_sig->cksum); | |
276 | if (sum) { | |
277 | printk(KERN_ERR "microcode: aborting, bad checksum\n"); | |
278 | return -EINVAL; | |
1da177e4 | 279 | } |
9a3110bf SL |
280 | } |
281 | return 0; | |
282 | } | |
5cf6c541 | 283 | |
9a3110bf SL |
284 | /* |
285 | * return 0 - no update found | |
286 | * return 1 - found update | |
9a3110bf | 287 | */ |
a0a29b62 DA |
288 | static int |
289 | get_matching_microcode(struct cpu_signature *cpu_sig, void *mc, int rev) | |
9a3110bf | 290 | { |
d4ee3668 | 291 | struct microcode_header_intel *mc_header = mc; |
9a3110bf SL |
292 | struct extended_sigtable *ext_header; |
293 | unsigned long total_size = get_totalsize(mc_header); | |
294 | int ext_sigcount, i; | |
295 | struct extended_signature *ext_sig; | |
9a3110bf | 296 | |
a0a29b62 DA |
297 | if (!update_match_revision(mc_header, rev)) |
298 | return 0; | |
299 | ||
300 | if (update_match_cpu(cpu_sig, mc_header->sig, mc_header->pf)) | |
301 | return 1; | |
9a3110bf | 302 | |
a0a29b62 | 303 | /* Look for ext. headers: */ |
9a3110bf SL |
304 | if (total_size <= get_datasize(mc_header) + MC_HEADER_SIZE) |
305 | return 0; | |
306 | ||
ade1af77 | 307 | ext_header = mc + get_datasize(mc_header) + MC_HEADER_SIZE; |
9a3110bf | 308 | ext_sigcount = ext_header->count; |
ade1af77 | 309 | ext_sig = (void *)ext_header + EXT_HEADER_SIZE; |
a0a29b62 | 310 | |
9a3110bf | 311 | for (i = 0; i < ext_sigcount; i++) { |
a0a29b62 DA |
312 | if (update_match_cpu(cpu_sig, ext_sig->sig, ext_sig->pf)) |
313 | return 1; | |
9a3110bf SL |
314 | ext_sig++; |
315 | } | |
316 | return 0; | |
1da177e4 LT |
317 | } |
318 | ||
8d86f390 | 319 | static void apply_microcode(int cpu) |
1da177e4 LT |
320 | { |
321 | unsigned long flags; | |
322 | unsigned int val[2]; | |
9a3110bf | 323 | int cpu_num = raw_smp_processor_id(); |
a0a29b62 | 324 | struct ucode_cpu_info *uci = ucode_cpu_info + cpu; |
18dbc916 | 325 | struct microcode_intel *mc_intel = uci->mc; |
1da177e4 | 326 | |
9a3110bf SL |
327 | /* We should bind the task to the CPU */ |
328 | BUG_ON(cpu_num != cpu); | |
329 | ||
18dbc916 | 330 | if (mc_intel == NULL) |
1da177e4 | 331 | return; |
1da177e4 LT |
332 | |
333 | /* serialize access to the physical write to MSR 0x79 */ | |
bc4e0f9a | 334 | spin_lock_irqsave(µcode_update_lock, flags); |
1da177e4 LT |
335 | |
336 | /* write microcode via MSR 0x79 */ | |
337 | wrmsr(MSR_IA32_UCODE_WRITE, | |
18dbc916 DA |
338 | (unsigned long) mc_intel->bits, |
339 | (unsigned long) mc_intel->bits >> 16 >> 16); | |
1da177e4 LT |
340 | wrmsr(MSR_IA32_UCODE_REV, 0, 0); |
341 | ||
245067d1 | 342 | /* see notes above for revision 1.07. Apparent chip bug */ |
487472bc | 343 | sync_core(); |
245067d1 | 344 | |
1da177e4 LT |
345 | /* get the current revision from MSR 0x8B */ |
346 | rdmsr(MSR_IA32_UCODE_REV, val[0], val[1]); | |
347 | ||
1da177e4 | 348 | spin_unlock_irqrestore(µcode_update_lock, flags); |
18dbc916 | 349 | if (val[1] != mc_intel->hdr.rev) { |
fe176de0 | 350 | printk(KERN_ERR "microcode: CPU%d update from revision " |
d45de409 | 351 | "0x%x to 0x%x failed\n", cpu_num, uci->cpu_sig.rev, val[1]); |
9a3110bf SL |
352 | return; |
353 | } | |
fe176de0 | 354 | printk(KERN_INFO "microcode: CPU%d updated from revision " |
34a1b9fc | 355 | "0x%x to 0x%x, date = %04x-%02x-%02x \n", |
d45de409 | 356 | cpu_num, uci->cpu_sig.rev, val[1], |
18dbc916 DA |
357 | mc_intel->hdr.date & 0xffff, |
358 | mc_intel->hdr.date >> 24, | |
359 | (mc_intel->hdr.date >> 16) & 0xff); | |
d45de409 | 360 | uci->cpu_sig.rev = val[1]; |
1da177e4 LT |
361 | } |
362 | ||
a0a29b62 DA |
363 | static int generic_load_microcode(int cpu, void *data, size_t size, |
364 | int (*get_ucode_data)(void *, const void *, size_t)) | |
9a3110bf | 365 | { |
a0a29b62 DA |
366 | struct ucode_cpu_info *uci = ucode_cpu_info + cpu; |
367 | u8 *ucode_ptr = data, *new_mc = NULL, *mc; | |
368 | int new_rev = uci->cpu_sig.rev; | |
369 | unsigned int leftover = size; | |
9a3110bf | 370 | |
a0a29b62 DA |
371 | while (leftover) { |
372 | struct microcode_header_intel mc_header; | |
373 | unsigned int mc_size; | |
9a3110bf | 374 | |
a0a29b62 DA |
375 | if (get_ucode_data(&mc_header, ucode_ptr, sizeof(mc_header))) |
376 | break; | |
a30a6a2c | 377 | |
a0a29b62 DA |
378 | mc_size = get_totalsize(&mc_header); |
379 | if (!mc_size || mc_size > leftover) { | |
380 | printk(KERN_ERR "microcode: error!" | |
381 | "Bad data in microcode data file\n"); | |
382 | break; | |
383 | } | |
a30a6a2c | 384 | |
a0a29b62 DA |
385 | mc = vmalloc(mc_size); |
386 | if (!mc) | |
387 | break; | |
388 | ||
389 | if (get_ucode_data(mc, ucode_ptr, mc_size) || | |
390 | microcode_sanity_check(mc) < 0) { | |
391 | vfree(mc); | |
392 | break; | |
393 | } | |
394 | ||
395 | if (get_matching_microcode(&uci->cpu_sig, mc, new_rev)) { | |
a1c75cc5 IM |
396 | if (new_mc) |
397 | vfree(new_mc); | |
a0a29b62 DA |
398 | new_rev = mc_header.rev; |
399 | new_mc = mc; | |
400 | } else | |
401 | vfree(mc); | |
402 | ||
403 | ucode_ptr += mc_size; | |
404 | leftover -= mc_size; | |
a30a6a2c SL |
405 | } |
406 | ||
a0a29b62 DA |
407 | if (new_mc) { |
408 | if (!leftover) { | |
18dbc916 DA |
409 | if (uci->mc) |
410 | vfree(uci->mc); | |
411 | uci->mc = (struct microcode_intel *)new_mc; | |
a0a29b62 DA |
412 | pr_debug("microcode: CPU%d found a matching microcode update with" |
413 | " version 0x%x (current=0x%x)\n", | |
18dbc916 | 414 | cpu, new_rev, uci->cpu_sig.rev); |
a0a29b62 DA |
415 | } else |
416 | vfree(new_mc); | |
a30a6a2c | 417 | } |
a0a29b62 DA |
418 | |
419 | return (int)leftover; | |
a30a6a2c SL |
420 | } |
421 | ||
a0a29b62 DA |
422 | static int get_ucode_fw(void *to, const void *from, size_t n) |
423 | { | |
424 | memcpy(to, from, n); | |
425 | return 0; | |
426 | } | |
a30a6a2c | 427 | |
a0a29b62 | 428 | static int request_microcode_fw(int cpu, struct device *device) |
a30a6a2c SL |
429 | { |
430 | char name[30]; | |
92cb7612 | 431 | struct cpuinfo_x86 *c = &cpu_data(cpu); |
a30a6a2c | 432 | const struct firmware *firmware; |
a0a29b62 | 433 | int ret; |
a30a6a2c SL |
434 | |
435 | /* We should bind the task to the CPU */ | |
436 | BUG_ON(cpu != raw_smp_processor_id()); | |
3e135d88 | 437 | sprintf(name, "intel-ucode/%02x-%02x-%02x", |
a30a6a2c | 438 | c->x86, c->x86_model, c->x86_mask); |
a0a29b62 DA |
439 | ret = request_firmware(&firmware, name, device); |
440 | if (ret) { | |
bc4e0f9a | 441 | pr_debug("microcode: data file %s load failed\n", name); |
a0a29b62 | 442 | return ret; |
a30a6a2c | 443 | } |
a0a29b62 DA |
444 | |
445 | ret = generic_load_microcode(cpu, (void*)firmware->data, firmware->size, | |
446 | &get_ucode_fw); | |
447 | ||
a30a6a2c SL |
448 | release_firmware(firmware); |
449 | ||
a0a29b62 DA |
450 | return ret; |
451 | } | |
452 | ||
453 | static int get_ucode_user(void *to, const void *from, size_t n) | |
454 | { | |
455 | return copy_from_user(to, from, n); | |
456 | } | |
457 | ||
458 | static int request_microcode_user(int cpu, const void __user *buf, size_t size) | |
459 | { | |
460 | /* We should bind the task to the CPU */ | |
461 | BUG_ON(cpu != raw_smp_processor_id()); | |
462 | ||
463 | return generic_load_microcode(cpu, (void*)buf, size, &get_ucode_user); | |
a30a6a2c SL |
464 | } |
465 | ||
8d86f390 | 466 | static void microcode_fini_cpu(int cpu) |
a30a6a2c SL |
467 | { |
468 | struct ucode_cpu_info *uci = ucode_cpu_info + cpu; | |
469 | ||
18dbc916 DA |
470 | vfree(uci->mc); |
471 | uci->mc = NULL; | |
a30a6a2c | 472 | } |
8d86f390 | 473 | |
4db646b1 | 474 | static struct microcode_ops microcode_intel_ops = { |
a0a29b62 DA |
475 | .request_microcode_user = request_microcode_user, |
476 | .request_microcode_fw = request_microcode_fw, | |
8d86f390 PO |
477 | .collect_cpu_info = collect_cpu_info, |
478 | .apply_microcode = apply_microcode, | |
479 | .microcode_fini_cpu = microcode_fini_cpu, | |
480 | }; | |
481 | ||
18dbc916 | 482 | struct microcode_ops * __init init_intel_microcode(void) |
8d86f390 | 483 | { |
18dbc916 | 484 | return µcode_intel_ops; |
8d86f390 PO |
485 | } |
486 |