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-rw-r--r--arch/x86/kernel/Makefile3
-rw-r--r--arch/x86/kernel/microcode.c463
-rw-r--r--arch/x86/kernel/microcode_intel.c387
3 files changed, 488 insertions, 365 deletions
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index a9be2a0dde80..abb32aed7f4b 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -51,7 +51,8 @@ obj-$(CONFIG_X86_BIOS_REBOOT) += reboot.o
51obj-$(CONFIG_MCA) += mca_32.o 51obj-$(CONFIG_MCA) += mca_32.o
52obj-$(CONFIG_X86_MSR) += msr.o 52obj-$(CONFIG_X86_MSR) += msr.o
53obj-$(CONFIG_X86_CPUID) += cpuid.o 53obj-$(CONFIG_X86_CPUID) += cpuid.o
54obj-$(CONFIG_MICROCODE) += microcode_intel.o 54obj-$(CONFIG_MICROCODE) += ucode.o
55ucode-objs := microcode.o microcode_intel.o
55obj-$(CONFIG_PCI) += early-quirks.o 56obj-$(CONFIG_PCI) += early-quirks.o
56apm-y := apm_32.o 57apm-y := apm_32.o
57obj-$(CONFIG_APM) += apm.o 58obj-$(CONFIG_APM) += apm.o
diff --git a/arch/x86/kernel/microcode.c b/arch/x86/kernel/microcode.c
new file mode 100644
index 000000000000..c1047d7f7ede
--- /dev/null
+++ b/arch/x86/kernel/microcode.c
@@ -0,0 +1,463 @@
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 *
15 * http://developer.intel.com/design/pentium4/manuals/253668.htm
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>,
58 * Serialize updates as required on HT processors due to speculative
59 * nature of implementation.
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 */
73
74//#define DEBUG /* pr_debug */
75#include <linux/capability.h>
76#include <linux/kernel.h>
77#include <linux/init.h>
78#include <linux/sched.h>
79#include <linux/smp_lock.h>
80#include <linux/cpumask.h>
81#include <linux/module.h>
82#include <linux/slab.h>
83#include <linux/vmalloc.h>
84#include <linux/miscdevice.h>
85#include <linux/spinlock.h>
86#include <linux/mm.h>
87#include <linux/fs.h>
88#include <linux/mutex.h>
89#include <linux/cpu.h>
90#include <linux/firmware.h>
91#include <linux/platform_device.h>
92
93#include <asm/msr.h>
94#include <asm/uaccess.h>
95#include <asm/processor.h>
96#include <asm/microcode.h>
97
98MODULE_DESCRIPTION("Microcode Update Driver");
99MODULE_AUTHOR("Tigran Aivazian <tigran@aivazian.fsnet.co.uk>");
100MODULE_LICENSE("GPL");
101
102#define MICROCODE_VERSION "1.14a"
103
104/* no concurrent ->write()s are allowed on /dev/cpu/microcode */
105DEFINE_MUTEX(microcode_mutex);
106
107struct ucode_cpu_info ucode_cpu_info[NR_CPUS];
108
109extern long get_next_ucode(void **mc, long offset);
110extern int microcode_sanity_check(void *mc);
111extern int get_matching_microcode(void *mc, int cpu);
112extern void collect_cpu_info(int cpu_num);
113extern int cpu_request_microcode(int cpu);
114extern void microcode_fini_cpu(int cpu);
115extern void apply_microcode(int cpu);
116extern int apply_microcode_check_cpu(int cpu);
117
118#ifdef CONFIG_MICROCODE_OLD_INTERFACE
119void __user *user_buffer; /* user area microcode data buffer */
120unsigned int user_buffer_size; /* it's size */
121
122static int do_microcode_update (void)
123{
124 long cursor = 0;
125 int error = 0;
126 void *new_mc = NULL;
127 int cpu;
128 cpumask_t old;
129 cpumask_of_cpu_ptr_declare(newmask);
130
131 old = current->cpus_allowed;
132
133 while ((cursor = get_next_ucode(&new_mc, cursor)) > 0) {
134 error = microcode_sanity_check(new_mc);
135 if (error)
136 goto out;
137 /*
138 * It's possible the data file has multiple matching ucode,
139 * lets keep searching till the latest version
140 */
141 for_each_online_cpu(cpu) {
142 struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
143
144 if (!uci->valid)
145 continue;
146 cpumask_of_cpu_ptr_next(newmask, cpu);
147 set_cpus_allowed_ptr(current, newmask);
148 error = get_maching_microcode(new_mc, cpu);
149 if (error < 0)
150 goto out;
151 if (error == 1)
152 apply_microcode(cpu);
153 }
154 vfree(new_mc);
155 }
156out:
157 if (cursor > 0)
158 vfree(new_mc);
159 if (cursor < 0)
160 error = cursor;
161 set_cpus_allowed_ptr(current, &old);
162 return error;
163}
164
165static int microcode_open (struct inode *unused1, struct file *unused2)
166{
167 cycle_kernel_lock();
168 return capable(CAP_SYS_RAWIO) ? 0 : -EPERM;
169}
170
171static ssize_t microcode_write (struct file *file, const char __user *buf, size_t len, loff_t *ppos)
172{
173 ssize_t ret;
174
175 if ((len >> PAGE_SHIFT) > num_physpages) {
176 printk(KERN_ERR "microcode: too much data (max %ld pages)\n", num_physpages);
177 return -EINVAL;
178 }
179
180 get_online_cpus();
181 mutex_lock(&microcode_mutex);
182
183 user_buffer = (void __user *) buf;
184 user_buffer_size = (int) len;
185
186 ret = do_microcode_update();
187 if (!ret)
188 ret = (ssize_t)len;
189
190 mutex_unlock(&microcode_mutex);
191 put_online_cpus();
192
193 return ret;
194}
195
196static const struct file_operations microcode_fops = {
197 .owner = THIS_MODULE,
198 .write = microcode_write,
199 .open = microcode_open,
200};
201
202static struct miscdevice microcode_dev = {
203 .minor = MICROCODE_MINOR,
204 .name = "microcode",
205 .fops = &microcode_fops,
206};
207
208static int __init microcode_dev_init (void)
209{
210 int error;
211
212 error = misc_register(&microcode_dev);
213 if (error) {
214 printk(KERN_ERR
215 "microcode: can't misc_register on minor=%d\n",
216 MICROCODE_MINOR);
217 return error;
218 }
219
220 return 0;
221}
222
223static void microcode_dev_exit (void)
224{
225 misc_deregister(&microcode_dev);
226}
227
228MODULE_ALIAS_MISCDEV(MICROCODE_MINOR);
229#else
230#define microcode_dev_init() 0
231#define microcode_dev_exit() do { } while(0)
232#endif
233
234/* fake device for request_firmware */
235struct platform_device *microcode_pdev;
236
237static void microcode_init_cpu(int cpu, int resume)
238{
239 cpumask_t old;
240 cpumask_of_cpu_ptr(newmask, cpu);
241 struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
242
243 old = current->cpus_allowed;
244
245 set_cpus_allowed_ptr(current, newmask);
246 mutex_lock(&microcode_mutex);
247 collect_cpu_info(cpu);
248 if (uci->valid && system_state == SYSTEM_RUNNING && !resume)
249 cpu_request_microcode(cpu);
250 mutex_unlock(&microcode_mutex);
251 set_cpus_allowed_ptr(current, &old);
252}
253
254static ssize_t reload_store(struct sys_device *dev,
255 struct sysdev_attribute *attr,
256 const char *buf, size_t sz)
257{
258 struct ucode_cpu_info *uci = ucode_cpu_info + dev->id;
259 char *end;
260 unsigned long val = simple_strtoul(buf, &end, 0);
261 int err = 0;
262 int cpu = dev->id;
263
264 if (end == buf)
265 return -EINVAL;
266 if (val == 1) {
267 cpumask_t old;
268 cpumask_of_cpu_ptr(newmask, cpu);
269
270 old = current->cpus_allowed;
271
272 get_online_cpus();
273 set_cpus_allowed_ptr(current, newmask);
274
275 mutex_lock(&microcode_mutex);
276 if (uci->valid)
277 err = cpu_request_microcode(cpu);
278 mutex_unlock(&microcode_mutex);
279 put_online_cpus();
280 set_cpus_allowed_ptr(current, &old);
281 }
282 if (err)
283 return err;
284 return sz;
285}
286
287static ssize_t version_show(struct sys_device *dev,
288 struct sysdev_attribute *attr, char *buf)
289{
290 struct ucode_cpu_info *uci = ucode_cpu_info + dev->id;
291
292 return sprintf(buf, "0x%x\n", uci->rev);
293}
294
295static ssize_t pf_show(struct sys_device *dev,
296 struct sysdev_attribute *attr, char *buf)
297{
298 struct ucode_cpu_info *uci = ucode_cpu_info + dev->id;
299
300 return sprintf(buf, "0x%x\n", uci->pf);
301}
302
303static SYSDEV_ATTR(reload, 0200, NULL, reload_store);
304static SYSDEV_ATTR(version, 0400, version_show, NULL);
305static SYSDEV_ATTR(processor_flags, 0400, pf_show, NULL);
306
307static struct attribute *mc_default_attrs[] = {
308 &attr_reload.attr,
309 &attr_version.attr,
310 &attr_processor_flags.attr,
311 NULL
312};
313
314static struct attribute_group mc_attr_group = {
315 .attrs = mc_default_attrs,
316 .name = "microcode",
317};
318
319static int __mc_sysdev_add(struct sys_device *sys_dev, int resume)
320{
321 int err, cpu = sys_dev->id;
322 struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
323
324 if (!cpu_online(cpu))
325 return 0;
326
327 pr_debug("microcode: CPU%d added\n", cpu);
328 memset(uci, 0, sizeof(*uci));
329
330 err = sysfs_create_group(&sys_dev->kobj, &mc_attr_group);
331 if (err)
332 return err;
333
334 microcode_init_cpu(cpu, resume);
335
336 return 0;
337}
338
339static int mc_sysdev_add(struct sys_device *sys_dev)
340{
341 return __mc_sysdev_add(sys_dev, 0);
342}
343
344static int mc_sysdev_remove(struct sys_device *sys_dev)
345{
346 int cpu = sys_dev->id;
347
348 if (!cpu_online(cpu))
349 return 0;
350
351 pr_debug("microcode: CPU%d removed\n", cpu);
352 microcode_fini_cpu(cpu);
353 sysfs_remove_group(&sys_dev->kobj, &mc_attr_group);
354 return 0;
355}
356
357static int mc_sysdev_resume(struct sys_device *dev)
358{
359 int cpu = dev->id;
360
361 if (!cpu_online(cpu))
362 return 0;
363 pr_debug("microcode: CPU%d resumed\n", cpu);
364 /* only CPU 0 will apply ucode here */
365 apply_microcode(0);
366 return 0;
367}
368
369static struct sysdev_driver mc_sysdev_driver = {
370 .add = mc_sysdev_add,
371 .remove = mc_sysdev_remove,
372 .resume = mc_sysdev_resume,
373};
374
375static __cpuinit int
376mc_cpu_callback(struct notifier_block *nb, unsigned long action, void *hcpu)
377{
378 unsigned int cpu = (unsigned long)hcpu;
379 struct sys_device *sys_dev;
380
381 sys_dev = get_cpu_sysdev(cpu);
382 switch (action) {
383 case CPU_UP_CANCELED_FROZEN:
384 /* The CPU refused to come up during a system resume */
385 microcode_fini_cpu(cpu);
386 break;
387 case CPU_ONLINE:
388 case CPU_DOWN_FAILED:
389 mc_sysdev_add(sys_dev);
390 break;
391 case CPU_ONLINE_FROZEN:
392 /* System-wide resume is in progress, try to apply microcode */
393 if (apply_microcode_check_cpu(cpu)) {
394 /* The application of microcode failed */
395 microcode_fini_cpu(cpu);
396 __mc_sysdev_add(sys_dev, 1);
397 break;
398 }
399 case CPU_DOWN_FAILED_FROZEN:
400 if (sysfs_create_group(&sys_dev->kobj, &mc_attr_group))
401 printk(KERN_ERR "microcode: Failed to create the sysfs "
402 "group for CPU%d\n", cpu);
403 break;
404 case CPU_DOWN_PREPARE:
405 mc_sysdev_remove(sys_dev);
406 break;
407 case CPU_DOWN_PREPARE_FROZEN:
408 /* Suspend is in progress, only remove the interface */
409 sysfs_remove_group(&sys_dev->kobj, &mc_attr_group);
410 break;
411 }
412 return NOTIFY_OK;
413}
414
415static struct notifier_block __refdata mc_cpu_notifier = {
416 .notifier_call = mc_cpu_callback,
417};
418
419static int __init microcode_init (void)
420{
421 int error;
422
423 printk(KERN_INFO
424 "IA-32 Microcode Update Driver: v" MICROCODE_VERSION " <tigran@aivazian.fsnet.co.uk>\n");
425
426 error = microcode_dev_init();
427 if (error)
428 return error;
429 microcode_pdev = platform_device_register_simple("microcode", -1,
430 NULL, 0);
431 if (IS_ERR(microcode_pdev)) {
432 microcode_dev_exit();
433 return PTR_ERR(microcode_pdev);
434 }
435
436 get_online_cpus();
437 error = sysdev_driver_register(&cpu_sysdev_class, &mc_sysdev_driver);
438 put_online_cpus();
439 if (error) {
440 microcode_dev_exit();
441 platform_device_unregister(microcode_pdev);
442 return error;
443 }
444
445 register_hotcpu_notifier(&mc_cpu_notifier);
446 return 0;
447}
448
449static void __exit microcode_exit (void)
450{
451 microcode_dev_exit();
452
453 unregister_hotcpu_notifier(&mc_cpu_notifier);
454
455 get_online_cpus();
456 sysdev_driver_unregister(&cpu_sysdev_class, &mc_sysdev_driver);
457 put_online_cpus();
458
459 platform_device_unregister(microcode_pdev);
460}
461
462module_init(microcode_init)
463module_exit(microcode_exit)
diff --git a/arch/x86/kernel/microcode_intel.c b/arch/x86/kernel/microcode_intel.c
index 4e7b2f65fed6..eded0a154ea8 100644
--- a/arch/x86/kernel/microcode_intel.c
+++ b/arch/x86/kernel/microcode_intel.c
@@ -95,18 +95,16 @@
95#include <asm/processor.h> 95#include <asm/processor.h>
96#include <asm/microcode.h> 96#include <asm/microcode.h>
97 97
98MODULE_DESCRIPTION("Intel CPU (IA-32) Microcode Update Driver"); 98MODULE_DESCRIPTION("Microcode Update Driver");
99MODULE_AUTHOR("Tigran Aivazian <tigran@aivazian.fsnet.co.uk>"); 99MODULE_AUTHOR("Tigran Aivazian <tigran@aivazian.fsnet.co.uk>");
100MODULE_LICENSE("GPL"); 100MODULE_LICENSE("GPL");
101 101
102#define MICROCODE_VERSION "1.14a"
103
104#define DEFAULT_UCODE_DATASIZE (2000) /* 2000 bytes */ 102#define DEFAULT_UCODE_DATASIZE (2000) /* 2000 bytes */
105#define MC_HEADER_SIZE (sizeof (struct microcode_header)) /* 48 bytes */ 103#define MC_HEADER_SIZE (sizeof(struct microcode_header)) /* 48 bytes */
106#define DEFAULT_UCODE_TOTALSIZE (DEFAULT_UCODE_DATASIZE + MC_HEADER_SIZE) /* 2048 bytes */ 104#define DEFAULT_UCODE_TOTALSIZE (DEFAULT_UCODE_DATASIZE + MC_HEADER_SIZE) /* 2048 bytes */
107#define EXT_HEADER_SIZE (sizeof (struct extended_sigtable)) /* 20 bytes */ 105#define EXT_HEADER_SIZE (sizeof(struct extended_sigtable)) /* 20 bytes */
108#define EXT_SIGNATURE_SIZE (sizeof (struct extended_signature)) /* 12 bytes */ 106#define EXT_SIGNATURE_SIZE (sizeof(struct extended_signature)) /* 12 bytes */
109#define DWSIZE (sizeof (u32)) 107#define DWSIZE (sizeof(u32))
110#define get_totalsize(mc) \ 108#define get_totalsize(mc) \
111 (((struct microcode *)mc)->hdr.totalsize ? \ 109 (((struct microcode *)mc)->hdr.totalsize ? \
112 ((struct microcode *)mc)->hdr.totalsize : DEFAULT_UCODE_TOTALSIZE) 110 ((struct microcode *)mc)->hdr.totalsize : DEFAULT_UCODE_TOTALSIZE)
@@ -123,11 +121,11 @@ MODULE_LICENSE("GPL");
123static DEFINE_SPINLOCK(microcode_update_lock); 121static DEFINE_SPINLOCK(microcode_update_lock);
124 122
125/* no concurrent ->write()s are allowed on /dev/cpu/microcode */ 123/* no concurrent ->write()s are allowed on /dev/cpu/microcode */
126static DEFINE_MUTEX(microcode_mutex); 124extern struct mutex microcode_mutex;
127 125
128static struct ucode_cpu_info ucode_cpu_info[NR_CPUS]; 126extern struct ucode_cpu_info ucode_cpu_info[NR_CPUS];
129 127
130static void collect_cpu_info(int cpu_num) 128void collect_cpu_info(int cpu_num)
131{ 129{
132 struct cpuinfo_x86 *c = &cpu_data(cpu_num); 130 struct cpuinfo_x86 *c = &cpu_data(cpu_num);
133 struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num; 131 struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
@@ -140,7 +138,7 @@ static void collect_cpu_info(int cpu_num)
140 uci->valid = 1; 138 uci->valid = 1;
141 139
142 if (c->x86_vendor != X86_VENDOR_INTEL || c->x86 < 6 || 140 if (c->x86_vendor != X86_VENDOR_INTEL || c->x86 < 6 ||
143 cpu_has(c, X86_FEATURE_IA64)) { 141 cpu_has(c, X86_FEATURE_IA64)) {
144 printk(KERN_ERR "microcode: CPU%d not a capable Intel " 142 printk(KERN_ERR "microcode: CPU%d not a capable Intel "
145 "processor\n", cpu_num); 143 "processor\n", cpu_num);
146 uci->valid = 0; 144 uci->valid = 0;
@@ -175,7 +173,7 @@ static inline int microcode_update_match(int cpu_num,
175 return 1; 173 return 1;
176} 174}
177 175
178static int microcode_sanity_check(void *mc) 176int microcode_sanity_check(void *mc)
179{ 177{
180 struct microcode_header *mc_header = mc; 178 struct microcode_header *mc_header = mc;
181 struct extended_sigtable *ext_header = NULL; 179 struct extended_sigtable *ext_header = NULL;
@@ -259,7 +257,7 @@ static int microcode_sanity_check(void *mc)
259 * return 1 - found update 257 * return 1 - found update
260 * return < 0 - error 258 * return < 0 - error
261 */ 259 */
262static int get_maching_microcode(void *mc, int cpu) 260int get_matching_microcode(void *mc, int cpu)
263{ 261{
264 struct ucode_cpu_info *uci = ucode_cpu_info + cpu; 262 struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
265 struct microcode_header *mc_header = mc; 263 struct microcode_header *mc_header = mc;
@@ -288,7 +286,7 @@ static int get_maching_microcode(void *mc, int cpu)
288 return 0; 286 return 0;
289find: 287find:
290 pr_debug("microcode: CPU%d found a matching microcode update with" 288 pr_debug("microcode: CPU%d found a matching microcode update with"
291 " version 0x%x (current=0x%x)\n", cpu, mc_header->rev,uci->rev); 289 " version 0x%x (current=0x%x)\n", cpu, mc_header->rev, uci->rev);
292 new_mc = vmalloc(total_size); 290 new_mc = vmalloc(total_size);
293 if (!new_mc) { 291 if (!new_mc) {
294 printk(KERN_ERR "microcode: error! Can not allocate memory\n"); 292 printk(KERN_ERR "microcode: error! Can not allocate memory\n");
@@ -303,7 +301,7 @@ find:
303 return 1; 301 return 1;
304} 302}
305 303
306static void apply_microcode(int cpu) 304void apply_microcode(int cpu)
307{ 305{
308 unsigned long flags; 306 unsigned long flags;
309 unsigned int val[2]; 307 unsigned int val[2];
@@ -344,10 +342,10 @@ static void apply_microcode(int cpu)
344} 342}
345 343
346#ifdef CONFIG_MICROCODE_OLD_INTERFACE 344#ifdef CONFIG_MICROCODE_OLD_INTERFACE
347static void __user *user_buffer; /* user area microcode data buffer */ 345extern void __user *user_buffer; /* user area microcode data buffer */
348static unsigned int user_buffer_size; /* it's size */ 346extern unsigned int user_buffer_size; /* it's size */
349 347
350static long get_next_ucode(void **mc, long offset) 348long get_next_ucode(void **mc, long offset)
351{ 349{
352 struct microcode_header mc_header; 350 struct microcode_header mc_header;
353 unsigned long total_size; 351 unsigned long total_size;
@@ -375,117 +373,6 @@ static long get_next_ucode(void **mc, long offset)
375 } 373 }
376 return offset + total_size; 374 return offset + total_size;
377} 375}
378
379static int do_microcode_update (void)
380{
381 long cursor = 0;
382 int error = 0;
383 void *new_mc = NULL;
384 int cpu;
385 cpumask_t old;
386 cpumask_of_cpu_ptr_declare(newmask);
387
388 old = current->cpus_allowed;
389
390 while ((cursor = get_next_ucode(&new_mc, cursor)) > 0) {
391 error = microcode_sanity_check(new_mc);
392 if (error)
393 goto out;
394 /*
395 * It's possible the data file has multiple matching ucode,
396 * lets keep searching till the latest version
397 */
398 for_each_online_cpu(cpu) {
399 struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
400
401 if (!uci->valid)
402 continue;
403 cpumask_of_cpu_ptr_next(newmask, cpu);
404 set_cpus_allowed_ptr(current, newmask);
405 error = get_maching_microcode(new_mc, cpu);
406 if (error < 0)
407 goto out;
408 if (error == 1)
409 apply_microcode(cpu);
410 }
411 vfree(new_mc);
412 }
413out:
414 if (cursor > 0)
415 vfree(new_mc);
416 if (cursor < 0)
417 error = cursor;
418 set_cpus_allowed_ptr(current, &old);
419 return error;
420}
421
422static int microcode_open (struct inode *unused1, struct file *unused2)
423{
424 cycle_kernel_lock();
425 return capable(CAP_SYS_RAWIO) ? 0 : -EPERM;
426}
427
428static ssize_t microcode_write (struct file *file, const char __user *buf, size_t len, loff_t *ppos)
429{
430 ssize_t ret;
431
432 if ((len >> PAGE_SHIFT) > num_physpages) {
433 printk(KERN_ERR "microcode: too much data (max %ld pages)\n", num_physpages);
434 return -EINVAL;
435 }
436
437 get_online_cpus();
438 mutex_lock(&microcode_mutex);
439
440 user_buffer = (void __user *) buf;
441 user_buffer_size = (int) len;
442
443 ret = do_microcode_update();
444 if (!ret)
445 ret = (ssize_t)len;
446
447 mutex_unlock(&microcode_mutex);
448 put_online_cpus();
449
450 return ret;
451}
452
453static const struct file_operations microcode_fops = {
454 .owner = THIS_MODULE,
455 .write = microcode_write,
456 .open = microcode_open,
457};
458
459static struct miscdevice microcode_dev = {
460 .minor = MICROCODE_MINOR,
461 .name = "microcode",
462 .fops = &microcode_fops,
463};
464
465static int __init microcode_dev_init (void)
466{
467 int error;
468
469 error = misc_register(&microcode_dev);
470 if (error) {
471 printk(KERN_ERR
472 "microcode: can't misc_register on minor=%d\n",
473 MICROCODE_MINOR);
474 return error;
475 }
476
477 return 0;
478}
479
480static void microcode_dev_exit (void)
481{
482 misc_deregister(&microcode_dev);
483}
484
485MODULE_ALIAS_MISCDEV(MICROCODE_MINOR);
486#else
487#define microcode_dev_init() 0
488#define microcode_dev_exit() do { } while(0)
489#endif 376#endif
490 377
491static long get_next_ucode_from_buffer(void **mc, const u8 *buf, 378static long get_next_ucode_from_buffer(void **mc, const u8 *buf,
@@ -515,9 +402,9 @@ static long get_next_ucode_from_buffer(void **mc, const u8 *buf,
515} 402}
516 403
517/* fake device for request_firmware */ 404/* fake device for request_firmware */
518static struct platform_device *microcode_pdev; 405extern struct platform_device *microcode_pdev;
519 406
520static int cpu_request_microcode(int cpu) 407int cpu_request_microcode(int cpu)
521{ 408{
522 char name[30]; 409 char name[30];
523 struct cpuinfo_x86 *c = &cpu_data(cpu); 410 struct cpuinfo_x86 *c = &cpu_data(cpu);
@@ -530,7 +417,7 @@ static int cpu_request_microcode(int cpu)
530 417
531 /* We should bind the task to the CPU */ 418 /* We should bind the task to the CPU */
532 BUG_ON(cpu != raw_smp_processor_id()); 419 BUG_ON(cpu != raw_smp_processor_id());
533 sprintf(name,"intel-ucode/%02x-%02x-%02x", 420 sprintf(name, "intel-ucode/%02x-%02x-%02x",
534 c->x86, c->x86_model, c->x86_mask); 421 c->x86, c->x86_model, c->x86_mask);
535 error = request_firmware(&firmware, name, &microcode_pdev->dev); 422 error = request_firmware(&firmware, name, &microcode_pdev->dev);
536 if (error) { 423 if (error) {
@@ -544,7 +431,7 @@ static int cpu_request_microcode(int cpu)
544 error = microcode_sanity_check(mc); 431 error = microcode_sanity_check(mc);
545 if (error) 432 if (error)
546 break; 433 break;
547 error = get_maching_microcode(mc, cpu); 434 error = get_matching_microcode(mc, cpu);
548 if (error < 0) 435 if (error < 0)
549 break; 436 break;
550 /* 437 /*
@@ -566,7 +453,7 @@ static int cpu_request_microcode(int cpu)
566 return error; 453 return error;
567} 454}
568 455
569static int apply_microcode_check_cpu(int cpu) 456int apply_microcode_check_cpu(int cpu)
570{ 457{
571 struct cpuinfo_x86 *c = &cpu_data(cpu); 458 struct cpuinfo_x86 *c = &cpu_data(cpu);
572 struct ucode_cpu_info *uci = ucode_cpu_info + cpu; 459 struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
@@ -615,241 +502,13 @@ static int apply_microcode_check_cpu(int cpu)
615 return err; 502 return err;
616} 503}
617 504
618static void microcode_init_cpu(int cpu, int resume) 505void microcode_fini_cpu(int cpu)
619{
620 cpumask_t old;
621 cpumask_of_cpu_ptr(newmask, cpu);
622 struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
623
624 old = current->cpus_allowed;
625
626 set_cpus_allowed_ptr(current, newmask);
627 mutex_lock(&microcode_mutex);
628 collect_cpu_info(cpu);
629 if (uci->valid && system_state == SYSTEM_RUNNING && !resume)
630 cpu_request_microcode(cpu);
631 mutex_unlock(&microcode_mutex);
632 set_cpus_allowed_ptr(current, &old);
633}
634
635static void microcode_fini_cpu(int cpu)
636{ 506{
637 struct ucode_cpu_info *uci = ucode_cpu_info + cpu; 507 struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
638 508
639 mutex_lock(&microcode_mutex); 509 mutex_lock(&microcode_mutex);
640 uci->valid = 0; 510 uci->valid = 0;
641 vfree(uci->mc); 511 kfree(uci->mc);
642 uci->mc = NULL; 512 uci->mc = NULL;
643 mutex_unlock(&microcode_mutex); 513 mutex_unlock(&microcode_mutex);
644} 514}
645
646static ssize_t reload_store(struct sys_device *dev,
647 struct sysdev_attribute *attr,
648 const char *buf, size_t sz)
649{
650 struct ucode_cpu_info *uci = ucode_cpu_info + dev->id;
651 char *end;
652 unsigned long val = simple_strtoul(buf, &end, 0);
653 int err = 0;
654 int cpu = dev->id;
655
656 if (end == buf)
657 return -EINVAL;
658 if (val == 1) {
659 cpumask_t old;
660 cpumask_of_cpu_ptr(newmask, cpu);
661
662 old = current->cpus_allowed;
663
664 get_online_cpus();
665 set_cpus_allowed_ptr(current, newmask);
666
667 mutex_lock(&microcode_mutex);
668 if (uci->valid)
669 err = cpu_request_microcode(cpu);
670 mutex_unlock(&microcode_mutex);
671 put_online_cpus();
672 set_cpus_allowed_ptr(current, &old);
673 }
674 if (err)
675 return err;
676 return sz;
677}
678
679static ssize_t version_show(struct sys_device *dev,
680 struct sysdev_attribute *attr, char *buf)
681{
682 struct ucode_cpu_info *uci = ucode_cpu_info + dev->id;
683
684 return sprintf(buf, "0x%x\n", uci->rev);
685}
686
687static ssize_t pf_show(struct sys_device *dev,
688 struct sysdev_attribute *attr, char *buf)
689{
690 struct ucode_cpu_info *uci = ucode_cpu_info + dev->id;
691
692 return sprintf(buf, "0x%x\n", uci->pf);
693}
694
695static SYSDEV_ATTR(reload, 0200, NULL, reload_store);
696static SYSDEV_ATTR(version, 0400, version_show, NULL);
697static SYSDEV_ATTR(processor_flags, 0400, pf_show, NULL);
698
699static struct attribute *mc_default_attrs[] = {
700 &attr_reload.attr,
701 &attr_version.attr,
702 &attr_processor_flags.attr,
703 NULL
704};
705
706static struct attribute_group mc_attr_group = {
707 .attrs = mc_default_attrs,
708 .name = "microcode",
709};
710
711static int __mc_sysdev_add(struct sys_device *sys_dev, int resume)
712{
713 int err, cpu = sys_dev->id;
714 struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
715
716 if (!cpu_online(cpu))
717 return 0;
718
719 pr_debug("microcode: CPU%d added\n", cpu);
720 memset(uci, 0, sizeof(*uci));
721
722 err = sysfs_create_group(&sys_dev->kobj, &mc_attr_group);
723 if (err)
724 return err;
725
726 microcode_init_cpu(cpu, resume);
727
728 return 0;
729}
730
731static int mc_sysdev_add(struct sys_device *sys_dev)
732{
733 return __mc_sysdev_add(sys_dev, 0);
734}
735
736static int mc_sysdev_remove(struct sys_device *sys_dev)
737{
738 int cpu = sys_dev->id;
739
740 if (!cpu_online(cpu))
741 return 0;
742
743 pr_debug("microcode: CPU%d removed\n", cpu);
744 microcode_fini_cpu(cpu);
745 sysfs_remove_group(&sys_dev->kobj, &mc_attr_group);
746 return 0;
747}
748
749static int mc_sysdev_resume(struct sys_device *dev)
750{
751 int cpu = dev->id;
752
753 if (!cpu_online(cpu))
754 return 0;
755 pr_debug("microcode: CPU%d resumed\n", cpu);
756 /* only CPU 0 will apply ucode here */
757 apply_microcode(0);
758 return 0;
759}
760
761static struct sysdev_driver mc_sysdev_driver = {
762 .add = mc_sysdev_add,
763 .remove = mc_sysdev_remove,
764 .resume = mc_sysdev_resume,
765};
766
767static __cpuinit int
768mc_cpu_callback(struct notifier_block *nb, unsigned long action, void *hcpu)
769{
770 unsigned int cpu = (unsigned long)hcpu;
771 struct sys_device *sys_dev;
772
773 sys_dev = get_cpu_sysdev(cpu);
774 switch (action) {
775 case CPU_UP_CANCELED_FROZEN:
776 /* The CPU refused to come up during a system resume */
777 microcode_fini_cpu(cpu);
778 break;
779 case CPU_ONLINE:
780 case CPU_DOWN_FAILED:
781 mc_sysdev_add(sys_dev);
782 break;
783 case CPU_ONLINE_FROZEN:
784 /* System-wide resume is in progress, try to apply microcode */
785 if (apply_microcode_check_cpu(cpu)) {
786 /* The application of microcode failed */
787 microcode_fini_cpu(cpu);
788 __mc_sysdev_add(sys_dev, 1);
789 break;
790 }
791 case CPU_DOWN_FAILED_FROZEN:
792 if (sysfs_create_group(&sys_dev->kobj, &mc_attr_group))
793 printk(KERN_ERR "microcode: Failed to create the sysfs "
794 "group for CPU%d\n", cpu);
795 break;
796 case CPU_DOWN_PREPARE:
797 mc_sysdev_remove(sys_dev);
798 break;
799 case CPU_DOWN_PREPARE_FROZEN:
800 /* Suspend is in progress, only remove the interface */
801 sysfs_remove_group(&sys_dev->kobj, &mc_attr_group);
802 break;
803 }
804 return NOTIFY_OK;
805}
806
807static struct notifier_block __refdata mc_cpu_notifier = {
808 .notifier_call = mc_cpu_callback,
809};
810
811static int __init microcode_init (void)
812{
813 int error;
814
815 printk(KERN_INFO
816 "IA-32 Microcode Update Driver: v" MICROCODE_VERSION " <tigran@aivazian.fsnet.co.uk>\n");
817
818 error = microcode_dev_init();
819 if (error)
820 return error;
821 microcode_pdev = platform_device_register_simple("microcode", -1,
822 NULL, 0);
823 if (IS_ERR(microcode_pdev)) {
824 microcode_dev_exit();
825 return PTR_ERR(microcode_pdev);
826 }
827
828 get_online_cpus();
829 error = sysdev_driver_register(&cpu_sysdev_class, &mc_sysdev_driver);
830 put_online_cpus();
831 if (error) {
832 microcode_dev_exit();
833 platform_device_unregister(microcode_pdev);
834 return error;
835 }
836
837 register_hotcpu_notifier(&mc_cpu_notifier);
838 return 0;
839}
840
841static void __exit microcode_exit (void)
842{
843 microcode_dev_exit();
844
845 unregister_hotcpu_notifier(&mc_cpu_notifier);
846
847 get_online_cpus();
848 sysdev_driver_unregister(&cpu_sysdev_class, &mc_sysdev_driver);
849 put_online_cpus();
850
851 platform_device_unregister(microcode_pdev);
852}
853
854module_init(microcode_init)
855module_exit(microcode_exit)
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-09 04:14:11 -0500