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); |
1da177e4 LT |
158 | unsigned int val[2]; |
159 | ||
d45de409 | 160 | memset(csig, 0, sizeof(*csig)); |
1da177e4 LT |
161 | |
162 | if (c->x86_vendor != X86_VENDOR_INTEL || c->x86 < 6 || | |
3e135d88 | 163 | cpu_has(c, X86_FEATURE_IA64)) { |
9a3110bf SL |
164 | printk(KERN_ERR "microcode: CPU%d not a capable Intel " |
165 | "processor\n", cpu_num); | |
d45de409 | 166 | return -1; |
9a3110bf | 167 | } |
1da177e4 | 168 | |
d45de409 | 169 | csig->sig = cpuid_eax(0x00000001); |
9a3110bf SL |
170 | |
171 | if ((c->x86_model >= 5) || (c->x86 > 6)) { | |
172 | /* get processor flags from MSR 0x17 */ | |
173 | rdmsr(MSR_IA32_PLATFORM_ID, val[0], val[1]); | |
d45de409 | 174 | csig->pf = 1 << ((val[1] >> 18) & 7); |
1da177e4 LT |
175 | } |
176 | ||
177 | wrmsr(MSR_IA32_UCODE_REV, 0, 0); | |
245067d1 | 178 | /* see notes above for revision 1.07. Apparent chip bug */ |
487472bc | 179 | sync_core(); |
1da177e4 | 180 | /* get the current revision from MSR 0x8B */ |
d45de409 | 181 | rdmsr(MSR_IA32_UCODE_REV, val[0], csig->rev); |
1da177e4 | 182 | pr_debug("microcode: collect_cpu_info : sig=0x%x, pf=0x%x, rev=0x%x\n", |
d45de409 DA |
183 | csig->sig, csig->pf, csig->rev); |
184 | ||
185 | return 0; | |
1da177e4 LT |
186 | } |
187 | ||
a0a29b62 | 188 | static inline int update_match_cpu(struct cpu_signature *csig, int sig, int pf) |
1da177e4 | 189 | { |
a0a29b62 DA |
190 | return (!sigmatch(sig, csig->sig, pf, csig->pf)) ? 0 : 1; |
191 | } | |
1da177e4 | 192 | |
a0a29b62 DA |
193 | static inline int |
194 | update_match_revision(struct microcode_header_intel *mc_header, int rev) | |
195 | { | |
196 | return (mc_header->rev <= rev) ? 0 : 1; | |
1da177e4 LT |
197 | } |
198 | ||
8d86f390 | 199 | static int microcode_sanity_check(void *mc) |
1da177e4 | 200 | { |
d4ee3668 | 201 | struct microcode_header_intel *mc_header = mc; |
9a3110bf SL |
202 | struct extended_sigtable *ext_header = NULL; |
203 | struct extended_signature *ext_sig; | |
204 | unsigned long total_size, data_size, ext_table_size; | |
205 | int sum, orig_sum, ext_sigcount = 0, i; | |
206 | ||
207 | total_size = get_totalsize(mc_header); | |
208 | data_size = get_datasize(mc_header); | |
bd8e39f9 | 209 | if (data_size + MC_HEADER_SIZE > total_size) { |
9a3110bf SL |
210 | printk(KERN_ERR "microcode: error! " |
211 | "Bad data size in microcode data file\n"); | |
212 | return -EINVAL; | |
213 | } | |
1da177e4 | 214 | |
9a3110bf SL |
215 | if (mc_header->ldrver != 1 || mc_header->hdrver != 1) { |
216 | printk(KERN_ERR "microcode: error! " | |
217 | "Unknown microcode update format\n"); | |
218 | return -EINVAL; | |
219 | } | |
220 | ext_table_size = total_size - (MC_HEADER_SIZE + data_size); | |
221 | if (ext_table_size) { | |
222 | if ((ext_table_size < EXT_HEADER_SIZE) | |
223 | || ((ext_table_size - EXT_HEADER_SIZE) % EXT_SIGNATURE_SIZE)) { | |
224 | printk(KERN_ERR "microcode: error! " | |
225 | "Small exttable size in microcode data file\n"); | |
226 | return -EINVAL; | |
1da177e4 | 227 | } |
9a3110bf SL |
228 | ext_header = mc + MC_HEADER_SIZE + data_size; |
229 | if (ext_table_size != exttable_size(ext_header)) { | |
230 | printk(KERN_ERR "microcode: error! " | |
231 | "Bad exttable size in microcode data file\n"); | |
232 | return -EFAULT; | |
1da177e4 | 233 | } |
9a3110bf SL |
234 | ext_sigcount = ext_header->count; |
235 | } | |
1da177e4 | 236 | |
9a3110bf SL |
237 | /* check extended table checksum */ |
238 | if (ext_table_size) { | |
239 | int ext_table_sum = 0; | |
9a4b9efa | 240 | int *ext_tablep = (int *)ext_header; |
9a3110bf SL |
241 | |
242 | i = ext_table_size / DWSIZE; | |
243 | while (i--) | |
244 | ext_table_sum += ext_tablep[i]; | |
245 | if (ext_table_sum) { | |
246 | printk(KERN_WARNING "microcode: aborting, " | |
247 | "bad extended signature table checksum\n"); | |
248 | return -EINVAL; | |
1da177e4 | 249 | } |
9a3110bf | 250 | } |
1da177e4 | 251 | |
9a3110bf SL |
252 | /* calculate the checksum */ |
253 | orig_sum = 0; | |
254 | i = (MC_HEADER_SIZE + data_size) / DWSIZE; | |
255 | while (i--) | |
256 | orig_sum += ((int *)mc)[i]; | |
257 | if (orig_sum) { | |
258 | printk(KERN_ERR "microcode: aborting, bad checksum\n"); | |
259 | return -EINVAL; | |
260 | } | |
261 | if (!ext_table_size) | |
262 | return 0; | |
263 | /* check extended signature checksum */ | |
264 | for (i = 0; i < ext_sigcount; i++) { | |
ade1af77 JE |
265 | ext_sig = (void *)ext_header + EXT_HEADER_SIZE + |
266 | EXT_SIGNATURE_SIZE * i; | |
9a3110bf SL |
267 | sum = orig_sum |
268 | - (mc_header->sig + mc_header->pf + mc_header->cksum) | |
269 | + (ext_sig->sig + ext_sig->pf + ext_sig->cksum); | |
270 | if (sum) { | |
271 | printk(KERN_ERR "microcode: aborting, bad checksum\n"); | |
272 | return -EINVAL; | |
1da177e4 | 273 | } |
9a3110bf SL |
274 | } |
275 | return 0; | |
276 | } | |
5cf6c541 | 277 | |
9a3110bf SL |
278 | /* |
279 | * return 0 - no update found | |
280 | * return 1 - found update | |
9a3110bf | 281 | */ |
a0a29b62 DA |
282 | static int |
283 | get_matching_microcode(struct cpu_signature *cpu_sig, void *mc, int rev) | |
9a3110bf | 284 | { |
d4ee3668 | 285 | struct microcode_header_intel *mc_header = mc; |
9a3110bf SL |
286 | struct extended_sigtable *ext_header; |
287 | unsigned long total_size = get_totalsize(mc_header); | |
288 | int ext_sigcount, i; | |
289 | struct extended_signature *ext_sig; | |
9a3110bf | 290 | |
a0a29b62 DA |
291 | if (!update_match_revision(mc_header, rev)) |
292 | return 0; | |
293 | ||
294 | if (update_match_cpu(cpu_sig, mc_header->sig, mc_header->pf)) | |
295 | return 1; | |
9a3110bf | 296 | |
a0a29b62 | 297 | /* Look for ext. headers: */ |
9a3110bf SL |
298 | if (total_size <= get_datasize(mc_header) + MC_HEADER_SIZE) |
299 | return 0; | |
300 | ||
ade1af77 | 301 | ext_header = mc + get_datasize(mc_header) + MC_HEADER_SIZE; |
9a3110bf | 302 | ext_sigcount = ext_header->count; |
ade1af77 | 303 | ext_sig = (void *)ext_header + EXT_HEADER_SIZE; |
a0a29b62 | 304 | |
9a3110bf | 305 | for (i = 0; i < ext_sigcount; i++) { |
a0a29b62 DA |
306 | if (update_match_cpu(cpu_sig, ext_sig->sig, ext_sig->pf)) |
307 | return 1; | |
9a3110bf SL |
308 | ext_sig++; |
309 | } | |
310 | return 0; | |
1da177e4 LT |
311 | } |
312 | ||
8d86f390 | 313 | static void apply_microcode(int cpu) |
1da177e4 LT |
314 | { |
315 | unsigned long flags; | |
316 | unsigned int val[2]; | |
9a3110bf | 317 | int cpu_num = raw_smp_processor_id(); |
a0a29b62 | 318 | struct ucode_cpu_info *uci = ucode_cpu_info + cpu; |
18dbc916 | 319 | struct microcode_intel *mc_intel = uci->mc; |
1da177e4 | 320 | |
9a3110bf SL |
321 | /* We should bind the task to the CPU */ |
322 | BUG_ON(cpu_num != cpu); | |
323 | ||
18dbc916 | 324 | if (mc_intel == NULL) |
1da177e4 | 325 | return; |
1da177e4 LT |
326 | |
327 | /* serialize access to the physical write to MSR 0x79 */ | |
bc4e0f9a | 328 | spin_lock_irqsave(µcode_update_lock, flags); |
1da177e4 LT |
329 | |
330 | /* write microcode via MSR 0x79 */ | |
331 | wrmsr(MSR_IA32_UCODE_WRITE, | |
18dbc916 DA |
332 | (unsigned long) mc_intel->bits, |
333 | (unsigned long) mc_intel->bits >> 16 >> 16); | |
1da177e4 LT |
334 | wrmsr(MSR_IA32_UCODE_REV, 0, 0); |
335 | ||
245067d1 | 336 | /* see notes above for revision 1.07. Apparent chip bug */ |
487472bc | 337 | sync_core(); |
245067d1 | 338 | |
1da177e4 LT |
339 | /* get the current revision from MSR 0x8B */ |
340 | rdmsr(MSR_IA32_UCODE_REV, val[0], val[1]); | |
341 | ||
1da177e4 | 342 | spin_unlock_irqrestore(µcode_update_lock, flags); |
18dbc916 | 343 | if (val[1] != mc_intel->hdr.rev) { |
fe176de0 | 344 | printk(KERN_ERR "microcode: CPU%d update from revision " |
d45de409 | 345 | "0x%x to 0x%x failed\n", cpu_num, uci->cpu_sig.rev, val[1]); |
9a3110bf SL |
346 | return; |
347 | } | |
fe176de0 | 348 | printk(KERN_INFO "microcode: CPU%d updated from revision " |
34a1b9fc | 349 | "0x%x to 0x%x, date = %04x-%02x-%02x \n", |
d45de409 | 350 | cpu_num, uci->cpu_sig.rev, val[1], |
18dbc916 DA |
351 | mc_intel->hdr.date & 0xffff, |
352 | mc_intel->hdr.date >> 24, | |
353 | (mc_intel->hdr.date >> 16) & 0xff); | |
d45de409 | 354 | uci->cpu_sig.rev = val[1]; |
1da177e4 LT |
355 | } |
356 | ||
a0a29b62 DA |
357 | static int generic_load_microcode(int cpu, void *data, size_t size, |
358 | int (*get_ucode_data)(void *, const void *, size_t)) | |
9a3110bf | 359 | { |
a0a29b62 DA |
360 | struct ucode_cpu_info *uci = ucode_cpu_info + cpu; |
361 | u8 *ucode_ptr = data, *new_mc = NULL, *mc; | |
362 | int new_rev = uci->cpu_sig.rev; | |
363 | unsigned int leftover = size; | |
9a3110bf | 364 | |
a0a29b62 DA |
365 | while (leftover) { |
366 | struct microcode_header_intel mc_header; | |
367 | unsigned int mc_size; | |
9a3110bf | 368 | |
a0a29b62 DA |
369 | if (get_ucode_data(&mc_header, ucode_ptr, sizeof(mc_header))) |
370 | break; | |
a30a6a2c | 371 | |
a0a29b62 DA |
372 | mc_size = get_totalsize(&mc_header); |
373 | if (!mc_size || mc_size > leftover) { | |
374 | printk(KERN_ERR "microcode: error!" | |
375 | "Bad data in microcode data file\n"); | |
376 | break; | |
377 | } | |
a30a6a2c | 378 | |
a0a29b62 DA |
379 | mc = vmalloc(mc_size); |
380 | if (!mc) | |
381 | break; | |
382 | ||
383 | if (get_ucode_data(mc, ucode_ptr, mc_size) || | |
384 | microcode_sanity_check(mc) < 0) { | |
385 | vfree(mc); | |
386 | break; | |
387 | } | |
388 | ||
389 | if (get_matching_microcode(&uci->cpu_sig, mc, new_rev)) { | |
a1c75cc5 IM |
390 | if (new_mc) |
391 | vfree(new_mc); | |
a0a29b62 DA |
392 | new_rev = mc_header.rev; |
393 | new_mc = mc; | |
394 | } else | |
395 | vfree(mc); | |
396 | ||
397 | ucode_ptr += mc_size; | |
398 | leftover -= mc_size; | |
a30a6a2c SL |
399 | } |
400 | ||
a0a29b62 DA |
401 | if (new_mc) { |
402 | if (!leftover) { | |
18dbc916 DA |
403 | if (uci->mc) |
404 | vfree(uci->mc); | |
405 | uci->mc = (struct microcode_intel *)new_mc; | |
a0a29b62 DA |
406 | pr_debug("microcode: CPU%d found a matching microcode update with" |
407 | " version 0x%x (current=0x%x)\n", | |
18dbc916 | 408 | cpu, new_rev, uci->cpu_sig.rev); |
a0a29b62 DA |
409 | } else |
410 | vfree(new_mc); | |
a30a6a2c | 411 | } |
a0a29b62 DA |
412 | |
413 | return (int)leftover; | |
a30a6a2c SL |
414 | } |
415 | ||
a0a29b62 DA |
416 | static int get_ucode_fw(void *to, const void *from, size_t n) |
417 | { | |
418 | memcpy(to, from, n); | |
419 | return 0; | |
420 | } | |
a30a6a2c | 421 | |
a0a29b62 | 422 | static int request_microcode_fw(int cpu, struct device *device) |
a30a6a2c SL |
423 | { |
424 | char name[30]; | |
92cb7612 | 425 | struct cpuinfo_x86 *c = &cpu_data(cpu); |
a30a6a2c | 426 | const struct firmware *firmware; |
a0a29b62 | 427 | int ret; |
a30a6a2c SL |
428 | |
429 | /* We should bind the task to the CPU */ | |
430 | BUG_ON(cpu != raw_smp_processor_id()); | |
3e135d88 | 431 | sprintf(name, "intel-ucode/%02x-%02x-%02x", |
a30a6a2c | 432 | c->x86, c->x86_model, c->x86_mask); |
a0a29b62 DA |
433 | ret = request_firmware(&firmware, name, device); |
434 | if (ret) { | |
bc4e0f9a | 435 | pr_debug("microcode: data file %s load failed\n", name); |
a0a29b62 | 436 | return ret; |
a30a6a2c | 437 | } |
a0a29b62 DA |
438 | |
439 | ret = generic_load_microcode(cpu, (void*)firmware->data, firmware->size, | |
440 | &get_ucode_fw); | |
441 | ||
a30a6a2c SL |
442 | release_firmware(firmware); |
443 | ||
a0a29b62 DA |
444 | return ret; |
445 | } | |
446 | ||
447 | static int get_ucode_user(void *to, const void *from, size_t n) | |
448 | { | |
449 | return copy_from_user(to, from, n); | |
450 | } | |
451 | ||
452 | static int request_microcode_user(int cpu, const void __user *buf, size_t size) | |
453 | { | |
454 | /* We should bind the task to the CPU */ | |
455 | BUG_ON(cpu != raw_smp_processor_id()); | |
456 | ||
457 | return generic_load_microcode(cpu, (void*)buf, size, &get_ucode_user); | |
a30a6a2c SL |
458 | } |
459 | ||
8d86f390 | 460 | static void microcode_fini_cpu(int cpu) |
a30a6a2c SL |
461 | { |
462 | struct ucode_cpu_info *uci = ucode_cpu_info + cpu; | |
463 | ||
18dbc916 DA |
464 | vfree(uci->mc); |
465 | uci->mc = NULL; | |
a30a6a2c | 466 | } |
8d86f390 | 467 | |
18dbc916 | 468 | struct microcode_ops microcode_intel_ops = { |
a0a29b62 DA |
469 | .request_microcode_user = request_microcode_user, |
470 | .request_microcode_fw = request_microcode_fw, | |
8d86f390 PO |
471 | .collect_cpu_info = collect_cpu_info, |
472 | .apply_microcode = apply_microcode, | |
473 | .microcode_fini_cpu = microcode_fini_cpu, | |
474 | }; | |
475 | ||
18dbc916 | 476 | struct microcode_ops * __init init_intel_microcode(void) |
8d86f390 | 477 | { |
18dbc916 | 478 | return µcode_intel_ops; |
8d86f390 PO |
479 | } |
480 |