blob: c25fdb38229212cb5e5ad79f527770bb9063153e [file] [log] [blame]
Peter Oruba80cc9f12008-07-28 18:44:22 +02001/*
2 * AMD CPU Microcode Update Driver for Linux
3 * Copyright (C) 2008 Advanced Micro Devices Inc.
4 *
5 * Author: Peter Oruba <peter.oruba@amd.com>
6 *
7 * Based on work by:
8 * Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
9 *
10 * This driver allows to upgrade microcode on AMD
11 * family 0x10 and 0x11 processors.
12 *
Andreas Herrmann2a3282a72008-12-16 19:08:53 +010013 * Licensed under the terms of the GNU General Public
Peter Oruba80cc9f12008-07-28 18:44:22 +020014 * License version 2. See file COPYING for details.
15*/
16
17#include <linux/capability.h>
18#include <linux/kernel.h>
19#include <linux/init.h>
20#include <linux/sched.h>
21#include <linux/cpumask.h>
22#include <linux/module.h>
23#include <linux/slab.h>
24#include <linux/vmalloc.h>
25#include <linux/miscdevice.h>
26#include <linux/spinlock.h>
27#include <linux/mm.h>
28#include <linux/fs.h>
29#include <linux/mutex.h>
30#include <linux/cpu.h>
31#include <linux/firmware.h>
32#include <linux/platform_device.h>
33#include <linux/pci.h>
34#include <linux/pci_ids.h>
Andreas Herrmannbe957762008-12-16 19:11:23 +010035#include <linux/uaccess.h>
Peter Oruba80cc9f12008-07-28 18:44:22 +020036
37#include <asm/msr.h>
Peter Oruba80cc9f12008-07-28 18:44:22 +020038#include <asm/processor.h>
39#include <asm/microcode.h>
40
41MODULE_DESCRIPTION("AMD Microcode Update Driver");
Peter Oruba3c522042008-10-17 15:30:38 +020042MODULE_AUTHOR("Peter Oruba");
Ingo Molnar5d7b6052008-07-29 10:07:36 +020043MODULE_LICENSE("GPL v2");
Peter Oruba80cc9f12008-07-28 18:44:22 +020044
45#define UCODE_MAGIC 0x00414d44
46#define UCODE_EQUIV_CPU_TABLE_TYPE 0x00000000
47#define UCODE_UCODE_TYPE 0x00000001
48
Dmitry Adamushko18dbc912008-09-23 12:08:44 +020049struct equiv_cpu_entry {
Andreas Herrmann5549b942008-12-16 19:21:30 +010050 u32 installed_cpu;
51 u32 fixed_errata_mask;
52 u32 fixed_errata_compare;
53 u16 equiv_cpu;
54 u16 res;
55} __attribute__((packed));
Dmitry Adamushko18dbc912008-09-23 12:08:44 +020056
57struct microcode_header_amd {
Andreas Herrmann5549b942008-12-16 19:21:30 +010058 u32 data_code;
59 u32 patch_id;
60 u16 mc_patch_data_id;
61 u8 mc_patch_data_len;
62 u8 init_flag;
63 u32 mc_patch_data_checksum;
64 u32 nb_dev_id;
65 u32 sb_dev_id;
66 u16 processor_rev_id;
67 u8 nb_rev_id;
68 u8 sb_rev_id;
69 u8 bios_api_rev;
70 u8 reserved1[3];
71 u32 match_reg[8];
72} __attribute__((packed));
Dmitry Adamushko18dbc912008-09-23 12:08:44 +020073
74struct microcode_amd {
75 struct microcode_header_amd hdr;
76 unsigned int mpb[0];
77};
78
Andreas Herrmann6cc9b6d2008-12-16 19:17:45 +010079#define UCODE_MAX_SIZE 2048
80#define UCODE_CONTAINER_SECTION_HDR 8
81#define UCODE_CONTAINER_HEADER_SIZE 12
Peter Oruba80cc9f12008-07-28 18:44:22 +020082
Peter Oruba80cc9f12008-07-28 18:44:22 +020083/* serialize access to the physical write */
84static DEFINE_SPINLOCK(microcode_update_lock);
85
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +020086static struct equiv_cpu_entry *equiv_cpu_table;
Peter Oruba80cc9f12008-07-28 18:44:22 +020087
Dmitry Adamushkod45de402008-08-20 00:22:26 +020088static int collect_cpu_info_amd(int cpu, struct cpu_signature *csig)
Peter Oruba80cc9f12008-07-28 18:44:22 +020089{
90 struct cpuinfo_x86 *c = &cpu_data(cpu);
Andreas Herrmann29d08872008-12-16 19:16:34 +010091 u32 dummy;
Peter Oruba80cc9f12008-07-28 18:44:22 +020092
Dmitry Adamushkod45de402008-08-20 00:22:26 +020093 memset(csig, 0, sizeof(*csig));
Peter Oruba80cc9f12008-07-28 18:44:22 +020094 if (c->x86_vendor != X86_VENDOR_AMD || c->x86 < 0x10) {
Andreas Herrmanndf23cab2008-12-16 19:22:36 +010095 printk(KERN_WARNING "microcode: CPU%d: AMD CPU family 0x%x not "
96 "supported\n", cpu, c->x86);
Dmitry Adamushkod45de402008-08-20 00:22:26 +020097 return -1;
Peter Oruba80cc9f12008-07-28 18:44:22 +020098 }
Andreas Herrmann29d08872008-12-16 19:16:34 +010099 rdmsr(MSR_AMD64_PATCH_LEVEL, csig->rev, dummy);
Andreas Herrmanndf23cab2008-12-16 19:22:36 +0100100 printk(KERN_INFO "microcode: CPU%d: patch_level=0x%x\n", cpu, csig->rev);
Dmitry Adamushkod45de402008-08-20 00:22:26 +0200101 return 0;
Peter Oruba80cc9f12008-07-28 18:44:22 +0200102}
103
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200104static int get_matching_microcode(int cpu, void *mc, int rev)
Peter Oruba80cc9f12008-07-28 18:44:22 +0200105{
Peter Oruba80cc9f12008-07-28 18:44:22 +0200106 struct microcode_header_amd *mc_header = mc;
Peter Oruba80cc9f12008-07-28 18:44:22 +0200107 unsigned int current_cpu_id;
Andreas Herrmann5549b942008-12-16 19:21:30 +0100108 u16 equiv_cpu_id = 0;
Peter Oruba80cc9f12008-07-28 18:44:22 +0200109 unsigned int i = 0;
110
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200111 BUG_ON(equiv_cpu_table == NULL);
Peter Oruba80cc9f12008-07-28 18:44:22 +0200112 current_cpu_id = cpuid_eax(0x00000001);
113
114 while (equiv_cpu_table[i].installed_cpu != 0) {
115 if (current_cpu_id == equiv_cpu_table[i].installed_cpu) {
Andreas Herrmann5549b942008-12-16 19:21:30 +0100116 equiv_cpu_id = equiv_cpu_table[i].equiv_cpu;
Peter Oruba80cc9f12008-07-28 18:44:22 +0200117 break;
118 }
119 i++;
120 }
121
122 if (!equiv_cpu_id) {
Andreas Herrmanndf23cab2008-12-16 19:22:36 +0100123 printk(KERN_WARNING "microcode: CPU%d: cpu revision "
124 "not listed in equivalent cpu table\n", cpu);
Peter Oruba80cc9f12008-07-28 18:44:22 +0200125 return 0;
126 }
127
Andreas Herrmann3c763fd2008-12-16 19:07:47 +0100128 if (mc_header->processor_rev_id != equiv_cpu_id) {
Andreas Herrmanndf23cab2008-12-16 19:22:36 +0100129 printk(KERN_ERR "microcode: CPU%d: patch mismatch "
130 "(processor_rev_id: %x, equiv_cpu_id: %x)\n",
Andreas Herrmann3c763fd2008-12-16 19:07:47 +0100131 cpu, mc_header->processor_rev_id, equiv_cpu_id);
Peter Oruba80cc9f12008-07-28 18:44:22 +0200132 return 0;
133 }
134
Andreas Herrmann98415302008-12-16 19:20:21 +0100135 /* ucode might be chipset specific -- currently we don't support this */
136 if (mc_header->nb_dev_id || mc_header->sb_dev_id) {
Andreas Herrmanndf23cab2008-12-16 19:22:36 +0100137 printk(KERN_ERR "microcode: CPU%d: loading of chipset "
Andreas Herrmann98415302008-12-16 19:20:21 +0100138 "specific code not yet supported\n", cpu);
139 return 0;
Peter Oruba80cc9f12008-07-28 18:44:22 +0200140 }
141
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200142 if (mc_header->patch_id <= rev)
Peter Oruba80cc9f12008-07-28 18:44:22 +0200143 return 0;
144
Peter Oruba80cc9f12008-07-28 18:44:22 +0200145 return 1;
146}
147
148static void apply_microcode_amd(int cpu)
149{
150 unsigned long flags;
Andreas Herrmann29d08872008-12-16 19:16:34 +0100151 u32 rev, dummy;
Peter Oruba80cc9f12008-07-28 18:44:22 +0200152 int cpu_num = raw_smp_processor_id();
153 struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
Dmitry Adamushko18dbc912008-09-23 12:08:44 +0200154 struct microcode_amd *mc_amd = uci->mc;
Peter Oruba80cc9f12008-07-28 18:44:22 +0200155
156 /* We should bind the task to the CPU */
157 BUG_ON(cpu_num != cpu);
158
Dmitry Adamushko18dbc912008-09-23 12:08:44 +0200159 if (mc_amd == NULL)
Peter Oruba80cc9f12008-07-28 18:44:22 +0200160 return;
161
162 spin_lock_irqsave(&microcode_update_lock, flags);
Ingo Molnarf34a10b2008-12-19 01:36:14 +0100163 wrmsrl(MSR_AMD64_PATCH_LOADER, (u64)(long)&mc_amd->hdr.data_code);
Peter Oruba80cc9f12008-07-28 18:44:22 +0200164 /* get patch id after patching */
Andreas Herrmann29d08872008-12-16 19:16:34 +0100165 rdmsr(MSR_AMD64_PATCH_LEVEL, rev, dummy);
Peter Oruba80cc9f12008-07-28 18:44:22 +0200166 spin_unlock_irqrestore(&microcode_update_lock, flags);
167
168 /* check current patch id and patch's id for match */
Dmitry Adamushko18dbc912008-09-23 12:08:44 +0200169 if (rev != mc_amd->hdr.patch_id) {
Andreas Herrmanndf23cab2008-12-16 19:22:36 +0100170 printk(KERN_ERR "microcode: CPU%d: update failed "
171 "(for patch_level=0x%x)\n", cpu, mc_amd->hdr.patch_id);
Peter Oruba80cc9f12008-07-28 18:44:22 +0200172 return;
173 }
174
Andreas Herrmanndf23cab2008-12-16 19:22:36 +0100175 printk(KERN_INFO "microcode: CPU%d: updated (new patch_level=0x%x)\n",
176 cpu, rev);
Peter Oruba80cc9f12008-07-28 18:44:22 +0200177
Dmitry Adamushkod45de402008-08-20 00:22:26 +0200178 uci->cpu_sig.rev = rev;
Peter Oruba80cc9f12008-07-28 18:44:22 +0200179}
180
Andreas Herrmann0657d9e2008-12-16 19:14:05 +0100181static int get_ucode_data(void *to, const u8 *from, size_t n)
182{
183 memcpy(to, from, n);
184 return 0;
185}
186
Andreas Herrmann8c135202008-12-16 19:13:00 +0100187static void *get_next_ucode(const u8 *buf, unsigned int size,
Andreas Herrmann0657d9e2008-12-16 19:14:05 +0100188 unsigned int *mc_size)
Peter Oruba80cc9f12008-07-28 18:44:22 +0200189{
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200190 unsigned int total_size;
Peter Orubad4738792008-09-17 15:39:18 +0200191 u8 section_hdr[UCODE_CONTAINER_SECTION_HDR];
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200192 void *mc;
Peter Oruba80cc9f12008-07-28 18:44:22 +0200193
Peter Orubad4738792008-09-17 15:39:18 +0200194 if (get_ucode_data(section_hdr, buf, UCODE_CONTAINER_SECTION_HDR))
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200195 return NULL;
Peter Oruba80cc9f12008-07-28 18:44:22 +0200196
Peter Orubad4738792008-09-17 15:39:18 +0200197 if (section_hdr[0] != UCODE_UCODE_TYPE) {
Andreas Herrmanndf23cab2008-12-16 19:22:36 +0100198 printk(KERN_ERR "microcode: error: invalid type field in "
199 "container file section header\n");
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200200 return NULL;
Peter Oruba80cc9f12008-07-28 18:44:22 +0200201 }
202
Peter Orubad4738792008-09-17 15:39:18 +0200203 total_size = (unsigned long) (section_hdr[4] + (section_hdr[5] << 8));
Peter Oruba80cc9f12008-07-28 18:44:22 +0200204
Andreas Herrmanndf23cab2008-12-16 19:22:36 +0100205 printk(KERN_DEBUG "microcode: size %u, total_size %u\n",
206 size, total_size);
Peter Oruba80cc9f12008-07-28 18:44:22 +0200207
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200208 if (total_size > size || total_size > UCODE_MAX_SIZE) {
Andreas Herrmanndf23cab2008-12-16 19:22:36 +0100209 printk(KERN_ERR "microcode: error: size mismatch\n");
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200210 return NULL;
Peter Oruba80cc9f12008-07-28 18:44:22 +0200211 }
212
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200213 mc = vmalloc(UCODE_MAX_SIZE);
214 if (mc) {
215 memset(mc, 0, UCODE_MAX_SIZE);
Andreas Herrmannbe957762008-12-16 19:11:23 +0100216 if (get_ucode_data(mc, buf + UCODE_CONTAINER_SECTION_HDR,
217 total_size)) {
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200218 vfree(mc);
219 mc = NULL;
220 } else
Peter Orubad4738792008-09-17 15:39:18 +0200221 *mc_size = total_size + UCODE_CONTAINER_SECTION_HDR;
Peter Oruba80cc9f12008-07-28 18:44:22 +0200222 }
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200223 return mc;
Peter Oruba80cc9f12008-07-28 18:44:22 +0200224}
225
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200226
Andreas Herrmann0657d9e2008-12-16 19:14:05 +0100227static int install_equiv_cpu_table(const u8 *buf)
Peter Oruba80cc9f12008-07-28 18:44:22 +0200228{
Peter Orubab6cffde2008-09-17 15:05:52 +0200229 u8 *container_hdr[UCODE_CONTAINER_HEADER_SIZE];
230 unsigned int *buf_pos = (unsigned int *)container_hdr;
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200231 unsigned long size;
Peter Oruba80cc9f12008-07-28 18:44:22 +0200232
Peter Orubab6cffde2008-09-17 15:05:52 +0200233 if (get_ucode_data(&container_hdr, buf, UCODE_CONTAINER_HEADER_SIZE))
Peter Oruba80cc9f12008-07-28 18:44:22 +0200234 return 0;
235
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200236 size = buf_pos[2];
Peter Oruba80cc9f12008-07-28 18:44:22 +0200237
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200238 if (buf_pos[1] != UCODE_EQUIV_CPU_TABLE_TYPE || !size) {
Andreas Herrmanndf23cab2008-12-16 19:22:36 +0100239 printk(KERN_ERR "microcode: error: invalid type field in "
240 "container file section header\n");
Peter Oruba80cc9f12008-07-28 18:44:22 +0200241 return 0;
242 }
243
244 equiv_cpu_table = (struct equiv_cpu_entry *) vmalloc(size);
245 if (!equiv_cpu_table) {
Andreas Herrmanndf23cab2008-12-16 19:22:36 +0100246 printk(KERN_ERR "microcode: failed to allocate "
247 "equivalent CPU table\n");
Peter Oruba80cc9f12008-07-28 18:44:22 +0200248 return 0;
249 }
250
Peter Orubab6cffde2008-09-17 15:05:52 +0200251 buf += UCODE_CONTAINER_HEADER_SIZE;
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200252 if (get_ucode_data(equiv_cpu_table, buf, size)) {
253 vfree(equiv_cpu_table);
254 return 0;
255 }
Peter Oruba80cc9f12008-07-28 18:44:22 +0200256
Peter Orubab6cffde2008-09-17 15:05:52 +0200257 return size + UCODE_CONTAINER_HEADER_SIZE; /* add header length */
Peter Oruba80cc9f12008-07-28 18:44:22 +0200258}
259
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200260static void free_equiv_cpu_table(void)
Peter Oruba80cc9f12008-07-28 18:44:22 +0200261{
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200262 if (equiv_cpu_table) {
263 vfree(equiv_cpu_table);
264 equiv_cpu_table = NULL;
Peter Oruba80cc9f12008-07-28 18:44:22 +0200265 }
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200266}
Peter Oruba80cc9f12008-07-28 18:44:22 +0200267
Andreas Herrmann0657d9e2008-12-16 19:14:05 +0100268static int generic_load_microcode(int cpu, const u8 *data, size_t size)
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200269{
270 struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
Andreas Herrmann8c135202008-12-16 19:13:00 +0100271 const u8 *ucode_ptr = data;
272 void *new_mc = NULL;
273 void *mc;
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200274 int new_rev = uci->cpu_sig.rev;
275 unsigned int leftover;
276 unsigned long offset;
Peter Oruba80cc9f12008-07-28 18:44:22 +0200277
Andreas Herrmann0657d9e2008-12-16 19:14:05 +0100278 offset = install_equiv_cpu_table(ucode_ptr);
Peter Oruba80cc9f12008-07-28 18:44:22 +0200279 if (!offset) {
Andreas Herrmanndf23cab2008-12-16 19:22:36 +0100280 printk(KERN_ERR "microcode: failed to create "
281 "equivalent cpu table\n");
Peter Oruba80cc9f12008-07-28 18:44:22 +0200282 return -EINVAL;
283 }
284
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200285 ucode_ptr += offset;
286 leftover = size - offset;
287
288 while (leftover) {
Dmitry Adamushko2f9284e2008-09-23 22:56:35 +0200289 unsigned int uninitialized_var(mc_size);
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200290 struct microcode_header_amd *mc_header;
291
Andreas Herrmann0657d9e2008-12-16 19:14:05 +0100292 mc = get_next_ucode(ucode_ptr, leftover, &mc_size);
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200293 if (!mc)
Peter Oruba80cc9f12008-07-28 18:44:22 +0200294 break;
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200295
296 mc_header = (struct microcode_header_amd *)mc;
297 if (get_matching_microcode(cpu, mc, new_rev)) {
Ingo Molnara1c75cc2008-09-14 14:50:26 +0200298 if (new_mc)
299 vfree(new_mc);
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200300 new_rev = mc_header->patch_id;
301 new_mc = mc;
Andreas Herrmannbe957762008-12-16 19:11:23 +0100302 } else
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200303 vfree(mc);
304
305 ucode_ptr += mc_size;
306 leftover -= mc_size;
Peter Oruba80cc9f12008-07-28 18:44:22 +0200307 }
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200308
309 if (new_mc) {
310 if (!leftover) {
Dmitry Adamushko18dbc912008-09-23 12:08:44 +0200311 if (uci->mc)
312 vfree(uci->mc);
313 uci->mc = new_mc;
Andreas Herrmannbe957762008-12-16 19:11:23 +0100314 pr_debug("microcode: CPU%d found a matching microcode "
315 "update with version 0x%x (current=0x%x)\n",
316 cpu, new_rev, uci->cpu_sig.rev);
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200317 } else
318 vfree(new_mc);
Peter Oruba80cc9f12008-07-28 18:44:22 +0200319 }
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200320
321 free_equiv_cpu_table();
322
323 return (int)leftover;
324}
325
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200326static int request_microcode_fw(int cpu, struct device *device)
327{
328 const char *fw_name = "amd-ucode/microcode_amd.bin";
329 const struct firmware *firmware;
330 int ret;
331
332 /* We should bind the task to the CPU */
333 BUG_ON(cpu != raw_smp_processor_id());
334
335 ret = request_firmware(&firmware, fw_name, device);
336 if (ret) {
Andreas Herrmanndf23cab2008-12-16 19:22:36 +0100337 printk(KERN_ERR "microcode: failed to load file %s\n", fw_name);
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200338 return ret;
339 }
340
Andreas Herrmann0657d9e2008-12-16 19:14:05 +0100341 ret = generic_load_microcode(cpu, firmware->data, firmware->size);
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200342
Peter Oruba80cc9f12008-07-28 18:44:22 +0200343 release_firmware(firmware);
344
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200345 return ret;
346}
347
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200348static int request_microcode_user(int cpu, const void __user *buf, size_t size)
349{
Andreas Herrmanndf23cab2008-12-16 19:22:36 +0100350 printk(KERN_INFO "microcode: AMD microcode update via "
351 "/dev/cpu/microcode not supported\n");
Dmitry Adamushko2f9284e2008-09-23 22:56:35 +0200352 return -1;
Peter Oruba80cc9f12008-07-28 18:44:22 +0200353}
354
Peter Oruba80cc9f12008-07-28 18:44:22 +0200355static void microcode_fini_cpu_amd(int cpu)
356{
357 struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
358
Dmitry Adamushko18dbc912008-09-23 12:08:44 +0200359 vfree(uci->mc);
360 uci->mc = NULL;
Peter Oruba80cc9f12008-07-28 18:44:22 +0200361}
362
363static struct microcode_ops microcode_amd_ops = {
Dmitry Adamushkoa0a29b62008-09-11 23:27:52 +0200364 .request_microcode_user = request_microcode_user,
365 .request_microcode_fw = request_microcode_fw,
Peter Oruba80cc9f12008-07-28 18:44:22 +0200366 .collect_cpu_info = collect_cpu_info_amd,
367 .apply_microcode = apply_microcode_amd,
368 .microcode_fini_cpu = microcode_fini_cpu_amd,
369};
370
Dmitry Adamushko18dbc912008-09-23 12:08:44 +0200371struct microcode_ops * __init init_amd_microcode(void)
Peter Oruba80cc9f12008-07-28 18:44:22 +0200372{
Dmitry Adamushko18dbc912008-09-23 12:08:44 +0200373 return &microcode_amd_ops;
Peter Oruba80cc9f12008-07-28 18:44:22 +0200374}
Ingo Molnarf34a10b2008-12-19 01:36:14 +0100375