1/*-
2 * Copyright (c) 2006-2008 Stanislav Sedov <stas@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 */
27
28#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 2006-2008 Stanislav Sedov <stas@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 */
27
28#include <sys/cdefs.h>
|
29__FBSDID("$FreeBSD: head/sys/dev/cpuctl/cpuctl.c 301962 2016-06-16 12:07:40Z kib $");
| 29__FBSDID("$FreeBSD: head/sys/dev/cpuctl/cpuctl.c 302372 2016-07-06 14:09:49Z nwhitehorn $");
|
30
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/conf.h>
34#include <sys/fcntl.h>
35#include <sys/ioccom.h>
36#include <sys/malloc.h>
37#include <sys/module.h>
38#include <sys/mutex.h>
39#include <sys/priv.h>
40#include <sys/proc.h>
41#include <sys/queue.h>
42#include <sys/sched.h>
43#include <sys/kernel.h>
44#include <sys/sysctl.h>
45#include <sys/uio.h>
46#include <sys/pcpu.h>
47#include <sys/smp.h>
48#include <sys/pmckern.h>
49#include <sys/cpuctl.h>
50
51#include <machine/cpufunc.h>
52#include <machine/md_var.h>
53#include <machine/specialreg.h>
54
55static d_open_t cpuctl_open;
56static d_ioctl_t cpuctl_ioctl;
57
58#define CPUCTL_VERSION 1
59
60#ifdef DEBUG
61# define DPRINTF(format,...) printf(format, __VA_ARGS__);
62#else
63# define DPRINTF(...)
64#endif
65
66#define UCODE_SIZE_MAX (32 * 1024)
67
68static int cpuctl_do_msr(int cpu, cpuctl_msr_args_t *data, u_long cmd,
69 struct thread *td);
70static int cpuctl_do_cpuid(int cpu, cpuctl_cpuid_args_t *data,
71 struct thread *td);
72static int cpuctl_do_cpuid_count(int cpu, cpuctl_cpuid_count_args_t *data,
73 struct thread *td);
74static int cpuctl_do_update(int cpu, cpuctl_update_args_t *data,
75 struct thread *td);
76static int update_intel(int cpu, cpuctl_update_args_t *args,
77 struct thread *td);
78static int update_amd(int cpu, cpuctl_update_args_t *args, struct thread *td);
79static int update_via(int cpu, cpuctl_update_args_t *args,
80 struct thread *td);
81
82static struct cdev **cpuctl_devs;
83static MALLOC_DEFINE(M_CPUCTL, "cpuctl", "CPUCTL buffer");
84
85static struct cdevsw cpuctl_cdevsw = {
86 .d_version = D_VERSION,
87 .d_open = cpuctl_open,
88 .d_ioctl = cpuctl_ioctl,
89 .d_name = "cpuctl",
90};
91
92/*
93 * This function checks if specified cpu enabled or not.
94 */
95static int
96cpu_enabled(int cpu)
97{
98
99 return (pmc_cpu_is_disabled(cpu) == 0);
100}
101
102/*
103 * Check if the current thread is bound to a specific cpu.
104 */
105static int
106cpu_sched_is_bound(struct thread *td)
107{
108 int ret;
109
110 thread_lock(td);
111 ret = sched_is_bound(td);
112 thread_unlock(td);
113 return (ret);
114}
115
116/*
117 * Switch to target cpu to run.
118 */
119static void
120set_cpu(int cpu, struct thread *td)
121{
122
| 30
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/conf.h>
34#include <sys/fcntl.h>
35#include <sys/ioccom.h>
36#include <sys/malloc.h>
37#include <sys/module.h>
38#include <sys/mutex.h>
39#include <sys/priv.h>
40#include <sys/proc.h>
41#include <sys/queue.h>
42#include <sys/sched.h>
43#include <sys/kernel.h>
44#include <sys/sysctl.h>
45#include <sys/uio.h>
46#include <sys/pcpu.h>
47#include <sys/smp.h>
48#include <sys/pmckern.h>
49#include <sys/cpuctl.h>
50
51#include <machine/cpufunc.h>
52#include <machine/md_var.h>
53#include <machine/specialreg.h>
54
55static d_open_t cpuctl_open;
56static d_ioctl_t cpuctl_ioctl;
57
58#define CPUCTL_VERSION 1
59
60#ifdef DEBUG
61# define DPRINTF(format,...) printf(format, __VA_ARGS__);
62#else
63# define DPRINTF(...)
64#endif
65
66#define UCODE_SIZE_MAX (32 * 1024)
67
68static int cpuctl_do_msr(int cpu, cpuctl_msr_args_t *data, u_long cmd,
69 struct thread *td);
70static int cpuctl_do_cpuid(int cpu, cpuctl_cpuid_args_t *data,
71 struct thread *td);
72static int cpuctl_do_cpuid_count(int cpu, cpuctl_cpuid_count_args_t *data,
73 struct thread *td);
74static int cpuctl_do_update(int cpu, cpuctl_update_args_t *data,
75 struct thread *td);
76static int update_intel(int cpu, cpuctl_update_args_t *args,
77 struct thread *td);
78static int update_amd(int cpu, cpuctl_update_args_t *args, struct thread *td);
79static int update_via(int cpu, cpuctl_update_args_t *args,
80 struct thread *td);
81
82static struct cdev **cpuctl_devs;
83static MALLOC_DEFINE(M_CPUCTL, "cpuctl", "CPUCTL buffer");
84
85static struct cdevsw cpuctl_cdevsw = {
86 .d_version = D_VERSION,
87 .d_open = cpuctl_open,
88 .d_ioctl = cpuctl_ioctl,
89 .d_name = "cpuctl",
90};
91
92/*
93 * This function checks if specified cpu enabled or not.
94 */
95static int
96cpu_enabled(int cpu)
97{
98
99 return (pmc_cpu_is_disabled(cpu) == 0);
100}
101
102/*
103 * Check if the current thread is bound to a specific cpu.
104 */
105static int
106cpu_sched_is_bound(struct thread *td)
107{
108 int ret;
109
110 thread_lock(td);
111 ret = sched_is_bound(td);
112 thread_unlock(td);
113 return (ret);
114}
115
116/*
117 * Switch to target cpu to run.
118 */
119static void
120set_cpu(int cpu, struct thread *td)
121{
122
|
123 KASSERT(cpu >= 0 && cpu < mp_ncpus && cpu_enabled(cpu),
| 123 KASSERT(cpu >= 0 && cpu <= mp_maxid && cpu_enabled(cpu),
|
124 ("[cpuctl,%d]: bad cpu number %d", __LINE__, cpu));
125 thread_lock(td);
126 sched_bind(td, cpu);
127 thread_unlock(td);
128 KASSERT(td->td_oncpu == cpu,
129 ("[cpuctl,%d]: cannot bind to target cpu %d on cpu %d", __LINE__, cpu, td->td_oncpu));
130}
131
132static void
133restore_cpu(int oldcpu, int is_bound, struct thread *td)
134{
135
| 124 ("[cpuctl,%d]: bad cpu number %d", __LINE__, cpu));
125 thread_lock(td);
126 sched_bind(td, cpu);
127 thread_unlock(td);
128 KASSERT(td->td_oncpu == cpu,
129 ("[cpuctl,%d]: cannot bind to target cpu %d on cpu %d", __LINE__, cpu, td->td_oncpu));
130}
131
132static void
133restore_cpu(int oldcpu, int is_bound, struct thread *td)
134{
135
|
136 KASSERT(oldcpu >= 0 && oldcpu < mp_ncpus && cpu_enabled(oldcpu),
| 136 KASSERT(oldcpu >= 0 && oldcpu <= mp_maxid && cpu_enabled(oldcpu),
|
137 ("[cpuctl,%d]: bad cpu number %d", __LINE__, oldcpu));
138 thread_lock(td);
139 if (is_bound == 0)
140 sched_unbind(td);
141 else
142 sched_bind(td, oldcpu);
143 thread_unlock(td);
144}
145
146int
147cpuctl_ioctl(struct cdev *dev, u_long cmd, caddr_t data,
148 int flags, struct thread *td)
149{
150 int ret;
151 int cpu = dev2unit(dev);
152
| 137 ("[cpuctl,%d]: bad cpu number %d", __LINE__, oldcpu));
138 thread_lock(td);
139 if (is_bound == 0)
140 sched_unbind(td);
141 else
142 sched_bind(td, oldcpu);
143 thread_unlock(td);
144}
145
146int
147cpuctl_ioctl(struct cdev *dev, u_long cmd, caddr_t data,
148 int flags, struct thread *td)
149{
150 int ret;
151 int cpu = dev2unit(dev);
152
|
153 if (cpu >= mp_ncpus || !cpu_enabled(cpu)) {
| 153 if (cpu > mp_maxid || !cpu_enabled(cpu)) {
|
154 DPRINTF("[cpuctl,%d]: bad cpu number %d\n", __LINE__, cpu);
155 return (ENXIO);
156 }
157 /* Require write flag for "write" requests. */
158 if ((cmd == CPUCTL_WRMSR || cmd == CPUCTL_UPDATE) &&
159 ((flags & FWRITE) == 0))
160 return (EPERM);
161 switch (cmd) {
162 case CPUCTL_RDMSR:
163 ret = cpuctl_do_msr(cpu, (cpuctl_msr_args_t *)data, cmd, td);
164 break;
165 case CPUCTL_MSRSBIT:
166 case CPUCTL_MSRCBIT:
167 case CPUCTL_WRMSR:
168 ret = priv_check(td, PRIV_CPUCTL_WRMSR);
169 if (ret != 0)
170 goto fail;
171 ret = cpuctl_do_msr(cpu, (cpuctl_msr_args_t *)data, cmd, td);
172 break;
173 case CPUCTL_CPUID:
174 ret = cpuctl_do_cpuid(cpu, (cpuctl_cpuid_args_t *)data, td);
175 break;
176 case CPUCTL_UPDATE:
177 ret = priv_check(td, PRIV_CPUCTL_UPDATE);
178 if (ret != 0)
179 goto fail;
180 ret = cpuctl_do_update(cpu, (cpuctl_update_args_t *)data, td);
181 break;
182 case CPUCTL_CPUID_COUNT:
183 ret = cpuctl_do_cpuid_count(cpu,
184 (cpuctl_cpuid_count_args_t *)data, td);
185 break;
186 default:
187 ret = EINVAL;
188 break;
189 }
190fail:
191 return (ret);
192}
193
194/*
195 * Actually perform cpuid operation.
196 */
197static int
198cpuctl_do_cpuid_count(int cpu, cpuctl_cpuid_count_args_t *data,
199 struct thread *td)
200{
201 int is_bound = 0;
202 int oldcpu;
203
| 154 DPRINTF("[cpuctl,%d]: bad cpu number %d\n", __LINE__, cpu);
155 return (ENXIO);
156 }
157 /* Require write flag for "write" requests. */
158 if ((cmd == CPUCTL_WRMSR || cmd == CPUCTL_UPDATE) &&
159 ((flags & FWRITE) == 0))
160 return (EPERM);
161 switch (cmd) {
162 case CPUCTL_RDMSR:
163 ret = cpuctl_do_msr(cpu, (cpuctl_msr_args_t *)data, cmd, td);
164 break;
165 case CPUCTL_MSRSBIT:
166 case CPUCTL_MSRCBIT:
167 case CPUCTL_WRMSR:
168 ret = priv_check(td, PRIV_CPUCTL_WRMSR);
169 if (ret != 0)
170 goto fail;
171 ret = cpuctl_do_msr(cpu, (cpuctl_msr_args_t *)data, cmd, td);
172 break;
173 case CPUCTL_CPUID:
174 ret = cpuctl_do_cpuid(cpu, (cpuctl_cpuid_args_t *)data, td);
175 break;
176 case CPUCTL_UPDATE:
177 ret = priv_check(td, PRIV_CPUCTL_UPDATE);
178 if (ret != 0)
179 goto fail;
180 ret = cpuctl_do_update(cpu, (cpuctl_update_args_t *)data, td);
181 break;
182 case CPUCTL_CPUID_COUNT:
183 ret = cpuctl_do_cpuid_count(cpu,
184 (cpuctl_cpuid_count_args_t *)data, td);
185 break;
186 default:
187 ret = EINVAL;
188 break;
189 }
190fail:
191 return (ret);
192}
193
194/*
195 * Actually perform cpuid operation.
196 */
197static int
198cpuctl_do_cpuid_count(int cpu, cpuctl_cpuid_count_args_t *data,
199 struct thread *td)
200{
201 int is_bound = 0;
202 int oldcpu;
203
|
204 KASSERT(cpu >= 0 && cpu < mp_ncpus,
| 204 KASSERT(cpu >= 0 && cpu <= mp_maxid,
|
205 ("[cpuctl,%d]: bad cpu number %d", __LINE__, cpu));
206
207 /* Explicitly clear cpuid data to avoid returning stale info. */
208 bzero(data->data, sizeof(data->data));
209 DPRINTF("[cpuctl,%d]: retrieving cpuid lev %#0x type %#0x for %d cpu\n",
210 __LINE__, data->level, data->level_type, cpu);
211#ifdef __i386__
212 if (cpu_id == 0)
213 return (ENODEV);
214#endif
215 oldcpu = td->td_oncpu;
216 is_bound = cpu_sched_is_bound(td);
217 set_cpu(cpu, td);
218 cpuid_count(data->level, data->level_type, data->data);
219 restore_cpu(oldcpu, is_bound, td);
220 return (0);
221}
222
223static int
224cpuctl_do_cpuid(int cpu, cpuctl_cpuid_args_t *data, struct thread *td)
225{
226 cpuctl_cpuid_count_args_t cdata;
227 int error;
228
229 cdata.level = data->level;
230 /* Override the level type. */
231 cdata.level_type = 0;
232 error = cpuctl_do_cpuid_count(cpu, &cdata, td);
233 bcopy(cdata.data, data->data, sizeof(data->data)); /* Ignore error */
234 return (error);
235}
236
237/*
238 * Actually perform MSR operations.
239 */
240static int
241cpuctl_do_msr(int cpu, cpuctl_msr_args_t *data, u_long cmd, struct thread *td)
242{
243 uint64_t reg;
244 int is_bound = 0;
245 int oldcpu;
246 int ret;
247
| 205 ("[cpuctl,%d]: bad cpu number %d", __LINE__, cpu));
206
207 /* Explicitly clear cpuid data to avoid returning stale info. */
208 bzero(data->data, sizeof(data->data));
209 DPRINTF("[cpuctl,%d]: retrieving cpuid lev %#0x type %#0x for %d cpu\n",
210 __LINE__, data->level, data->level_type, cpu);
211#ifdef __i386__
212 if (cpu_id == 0)
213 return (ENODEV);
214#endif
215 oldcpu = td->td_oncpu;
216 is_bound = cpu_sched_is_bound(td);
217 set_cpu(cpu, td);
218 cpuid_count(data->level, data->level_type, data->data);
219 restore_cpu(oldcpu, is_bound, td);
220 return (0);
221}
222
223static int
224cpuctl_do_cpuid(int cpu, cpuctl_cpuid_args_t *data, struct thread *td)
225{
226 cpuctl_cpuid_count_args_t cdata;
227 int error;
228
229 cdata.level = data->level;
230 /* Override the level type. */
231 cdata.level_type = 0;
232 error = cpuctl_do_cpuid_count(cpu, &cdata, td);
233 bcopy(cdata.data, data->data, sizeof(data->data)); /* Ignore error */
234 return (error);
235}
236
237/*
238 * Actually perform MSR operations.
239 */
240static int
241cpuctl_do_msr(int cpu, cpuctl_msr_args_t *data, u_long cmd, struct thread *td)
242{
243 uint64_t reg;
244 int is_bound = 0;
245 int oldcpu;
246 int ret;
247
|
248 KASSERT(cpu >= 0 && cpu < mp_ncpus,
| 248 KASSERT(cpu >= 0 && cpu <= mp_maxid,
|
249 ("[cpuctl,%d]: bad cpu number %d", __LINE__, cpu));
250
251 /*
252 * Explicitly clear cpuid data to avoid returning stale
253 * info
254 */
255 DPRINTF("[cpuctl,%d]: operating on MSR %#0x for %d cpu\n", __LINE__,
256 data->msr, cpu);
257#ifdef __i386__
258 if ((cpu_feature & CPUID_MSR) == 0)
259 return (ENODEV);
260#endif
261 oldcpu = td->td_oncpu;
262 is_bound = cpu_sched_is_bound(td);
263 set_cpu(cpu, td);
264 if (cmd == CPUCTL_RDMSR) {
265 data->data = 0;
266 ret = rdmsr_safe(data->msr, &data->data);
267 } else if (cmd == CPUCTL_WRMSR) {
268 ret = wrmsr_safe(data->msr, data->data);
269 } else if (cmd == CPUCTL_MSRSBIT) {
270 critical_enter();
271 ret = rdmsr_safe(data->msr, ®);
272 if (ret == 0)
273 ret = wrmsr_safe(data->msr, reg | data->data);
274 critical_exit();
275 } else if (cmd == CPUCTL_MSRCBIT) {
276 critical_enter();
277 ret = rdmsr_safe(data->msr, ®);
278 if (ret == 0)
279 ret = wrmsr_safe(data->msr, reg & ~data->data);
280 critical_exit();
281 } else
282 panic("[cpuctl,%d]: unknown operation requested: %lu", __LINE__, cmd);
283 restore_cpu(oldcpu, is_bound, td);
284 return (ret);
285}
286
287/*
288 * Actually perform microcode update.
289 */
290static int
291cpuctl_do_update(int cpu, cpuctl_update_args_t *data, struct thread *td)
292{
293 cpuctl_cpuid_args_t args = {
294 .level = 0,
295 };
296 char vendor[13];
297 int ret;
298
| 249 ("[cpuctl,%d]: bad cpu number %d", __LINE__, cpu));
250
251 /*
252 * Explicitly clear cpuid data to avoid returning stale
253 * info
254 */
255 DPRINTF("[cpuctl,%d]: operating on MSR %#0x for %d cpu\n", __LINE__,
256 data->msr, cpu);
257#ifdef __i386__
258 if ((cpu_feature & CPUID_MSR) == 0)
259 return (ENODEV);
260#endif
261 oldcpu = td->td_oncpu;
262 is_bound = cpu_sched_is_bound(td);
263 set_cpu(cpu, td);
264 if (cmd == CPUCTL_RDMSR) {
265 data->data = 0;
266 ret = rdmsr_safe(data->msr, &data->data);
267 } else if (cmd == CPUCTL_WRMSR) {
268 ret = wrmsr_safe(data->msr, data->data);
269 } else if (cmd == CPUCTL_MSRSBIT) {
270 critical_enter();
271 ret = rdmsr_safe(data->msr, ®);
272 if (ret == 0)
273 ret = wrmsr_safe(data->msr, reg | data->data);
274 critical_exit();
275 } else if (cmd == CPUCTL_MSRCBIT) {
276 critical_enter();
277 ret = rdmsr_safe(data->msr, ®);
278 if (ret == 0)
279 ret = wrmsr_safe(data->msr, reg & ~data->data);
280 critical_exit();
281 } else
282 panic("[cpuctl,%d]: unknown operation requested: %lu", __LINE__, cmd);
283 restore_cpu(oldcpu, is_bound, td);
284 return (ret);
285}
286
287/*
288 * Actually perform microcode update.
289 */
290static int
291cpuctl_do_update(int cpu, cpuctl_update_args_t *data, struct thread *td)
292{
293 cpuctl_cpuid_args_t args = {
294 .level = 0,
295 };
296 char vendor[13];
297 int ret;
298
|
299 KASSERT(cpu >= 0 && cpu < mp_ncpus,
| 299 KASSERT(cpu >= 0 && cpu <= mp_maxid,
|
300 ("[cpuctl,%d]: bad cpu number %d", __LINE__, cpu));
301 DPRINTF("[cpuctl,%d]: XXX %d", __LINE__, cpu);
302
303 ret = cpuctl_do_cpuid(cpu, &args, td);
304 if (ret != 0)
305 return (ret);
306 ((uint32_t *)vendor)[0] = args.data[1];
307 ((uint32_t *)vendor)[1] = args.data[3];
308 ((uint32_t *)vendor)[2] = args.data[2];
309 vendor[12] = '\0';
310 if (strncmp(vendor, INTEL_VENDOR_ID, sizeof(INTEL_VENDOR_ID)) == 0)
311 ret = update_intel(cpu, data, td);
312 else if(strncmp(vendor, AMD_VENDOR_ID, sizeof(AMD_VENDOR_ID)) == 0)
313 ret = update_amd(cpu, data, td);
314 else if(strncmp(vendor, CENTAUR_VENDOR_ID, sizeof(CENTAUR_VENDOR_ID)) == 0)
315 ret = update_via(cpu, data, td);
316 else
317 ret = ENXIO;
318 return (ret);
319}
320
321static int
322update_intel(int cpu, cpuctl_update_args_t *args, struct thread *td)
323{
324 void *ptr;
325 uint64_t rev0, rev1;
326 uint32_t tmp[4];
327 int is_bound;
328 int oldcpu;
329 int ret;
330
331 if (args->size == 0 || args->data == NULL) {
332 DPRINTF("[cpuctl,%d]: zero-sized firmware image", __LINE__);
333 return (EINVAL);
334 }
335 if (args->size > UCODE_SIZE_MAX) {
336 DPRINTF("[cpuctl,%d]: firmware image too large", __LINE__);
337 return (EINVAL);
338 }
339
340 /*
341 * 16 byte alignment required. Rely on the fact that
342 * malloc(9) always returns the pointer aligned at least on
343 * the size of the allocation.
344 */
345 ptr = malloc(args->size + 16, M_CPUCTL, M_WAITOK);
346 if (copyin(args->data, ptr, args->size) != 0) {
347 DPRINTF("[cpuctl,%d]: copyin %p->%p of %zd bytes failed",
348 __LINE__, args->data, ptr, args->size);
349 ret = EFAULT;
350 goto fail;
351 }
352 oldcpu = td->td_oncpu;
353 is_bound = cpu_sched_is_bound(td);
354 set_cpu(cpu, td);
355 critical_enter();
356 rdmsr_safe(MSR_BIOS_SIGN, &rev0); /* Get current microcode revision. */
357
358 /*
359 * Perform update.
360 */
361 wrmsr_safe(MSR_BIOS_UPDT_TRIG, (uintptr_t)(ptr));
362 wrmsr_safe(MSR_BIOS_SIGN, 0);
363
364 /*
365 * Serialize instruction flow.
366 */
367 do_cpuid(0, tmp);
368 critical_exit();
369 rdmsr_safe(MSR_BIOS_SIGN, &rev1); /* Get new microcode revision. */
370 restore_cpu(oldcpu, is_bound, td);
371 if (rev1 > rev0)
372 ret = 0;
373 else
374 ret = EEXIST;
375fail:
376 free(ptr, M_CPUCTL);
377 return (ret);
378}
379
380static int
381update_amd(int cpu, cpuctl_update_args_t *args, struct thread *td)
382{
383 void *ptr = NULL;
384 uint32_t tmp[4];
385 int is_bound = 0;
386 int oldcpu;
387 int ret;
388
389 if (args->size == 0 || args->data == NULL) {
390 DPRINTF("[cpuctl,%d]: zero-sized firmware image", __LINE__);
391 return (EINVAL);
392 }
393 if (args->size > UCODE_SIZE_MAX) {
394 DPRINTF("[cpuctl,%d]: firmware image too large", __LINE__);
395 return (EINVAL);
396 }
397 /*
398 * XXX Might not require contignous address space - needs check
399 */
400 ptr = contigmalloc(args->size, M_CPUCTL, 0, 0, 0xffffffff, 16, 0);
401 if (ptr == NULL) {
402 DPRINTF("[cpuctl,%d]: cannot allocate %zd bytes of memory",
403 __LINE__, args->size);
404 return (ENOMEM);
405 }
406 if (copyin(args->data, ptr, args->size) != 0) {
407 DPRINTF("[cpuctl,%d]: copyin %p->%p of %zd bytes failed",
408 __LINE__, args->data, ptr, args->size);
409 ret = EFAULT;
410 goto fail;
411 }
412 oldcpu = td->td_oncpu;
413 is_bound = cpu_sched_is_bound(td);
414 set_cpu(cpu, td);
415 critical_enter();
416
417 /*
418 * Perform update.
419 */
420 wrmsr_safe(MSR_K8_UCODE_UPDATE, (uintptr_t)ptr);
421
422 /*
423 * Serialize instruction flow.
424 */
425 do_cpuid(0, tmp);
426 critical_exit();
427 restore_cpu(oldcpu, is_bound, td);
428 ret = 0;
429fail:
430 if (ptr != NULL)
431 contigfree(ptr, args->size, M_CPUCTL);
432 return (ret);
433}
434
435static int
436update_via(int cpu, cpuctl_update_args_t *args, struct thread *td)
437{
438 void *ptr;
439 uint64_t rev0, rev1, res;
440 uint32_t tmp[4];
441 int is_bound;
442 int oldcpu;
443 int ret;
444
445 if (args->size == 0 || args->data == NULL) {
446 DPRINTF("[cpuctl,%d]: zero-sized firmware image", __LINE__);
447 return (EINVAL);
448 }
449 if (args->size > UCODE_SIZE_MAX) {
450 DPRINTF("[cpuctl,%d]: firmware image too large", __LINE__);
451 return (EINVAL);
452 }
453
454 /*
455 * 4 byte alignment required.
456 */
457 ptr = malloc(args->size, M_CPUCTL, M_WAITOK);
458 if (copyin(args->data, ptr, args->size) != 0) {
459 DPRINTF("[cpuctl,%d]: copyin %p->%p of %zd bytes failed",
460 __LINE__, args->data, ptr, args->size);
461 ret = EFAULT;
462 goto fail;
463 }
464 oldcpu = td->td_oncpu;
465 is_bound = cpu_sched_is_bound(td);
466 set_cpu(cpu, td);
467 critical_enter();
468 rdmsr_safe(MSR_BIOS_SIGN, &rev0); /* Get current microcode revision. */
469
470 /*
471 * Perform update.
472 */
473 wrmsr_safe(MSR_BIOS_UPDT_TRIG, (uintptr_t)(ptr));
474 do_cpuid(1, tmp);
475
476 /*
477 * Result are in low byte of MSR FCR5:
478 * 0x00: No update has been attempted since RESET.
479 * 0x01: The last attempted update was successful.
480 * 0x02: The last attempted update was unsuccessful due to a bad
481 * environment. No update was loaded and any preexisting
482 * patches are still active.
483 * 0x03: The last attempted update was not applicable to this processor.
484 * No update was loaded and any preexisting patches are still
485 * active.
486 * 0x04: The last attempted update was not successful due to an invalid
487 * update data block. No update was loaded and any preexisting
488 * patches are still active
489 */
490 rdmsr_safe(0x1205, &res);
491 res &= 0xff;
492 critical_exit();
493 rdmsr_safe(MSR_BIOS_SIGN, &rev1); /* Get new microcode revision. */
494 restore_cpu(oldcpu, is_bound, td);
495
496 DPRINTF("[cpu,%d]: rev0=%x rev1=%x res=%x\n", __LINE__,
497 (unsigned)(rev0 >> 32), (unsigned)(rev1 >> 32), (unsigned)res);
498
499 if (res != 0x01)
500 ret = EINVAL;
501 else
502 ret = 0;
503fail:
504 free(ptr, M_CPUCTL);
505 return (ret);
506}
507
508int
509cpuctl_open(struct cdev *dev, int flags, int fmt __unused, struct thread *td)
510{
511 int ret = 0;
512 int cpu;
513
514 cpu = dev2unit(dev);
| 300 ("[cpuctl,%d]: bad cpu number %d", __LINE__, cpu));
301 DPRINTF("[cpuctl,%d]: XXX %d", __LINE__, cpu);
302
303 ret = cpuctl_do_cpuid(cpu, &args, td);
304 if (ret != 0)
305 return (ret);
306 ((uint32_t *)vendor)[0] = args.data[1];
307 ((uint32_t *)vendor)[1] = args.data[3];
308 ((uint32_t *)vendor)[2] = args.data[2];
309 vendor[12] = '\0';
310 if (strncmp(vendor, INTEL_VENDOR_ID, sizeof(INTEL_VENDOR_ID)) == 0)
311 ret = update_intel(cpu, data, td);
312 else if(strncmp(vendor, AMD_VENDOR_ID, sizeof(AMD_VENDOR_ID)) == 0)
313 ret = update_amd(cpu, data, td);
314 else if(strncmp(vendor, CENTAUR_VENDOR_ID, sizeof(CENTAUR_VENDOR_ID)) == 0)
315 ret = update_via(cpu, data, td);
316 else
317 ret = ENXIO;
318 return (ret);
319}
320
321static int
322update_intel(int cpu, cpuctl_update_args_t *args, struct thread *td)
323{
324 void *ptr;
325 uint64_t rev0, rev1;
326 uint32_t tmp[4];
327 int is_bound;
328 int oldcpu;
329 int ret;
330
331 if (args->size == 0 || args->data == NULL) {
332 DPRINTF("[cpuctl,%d]: zero-sized firmware image", __LINE__);
333 return (EINVAL);
334 }
335 if (args->size > UCODE_SIZE_MAX) {
336 DPRINTF("[cpuctl,%d]: firmware image too large", __LINE__);
337 return (EINVAL);
338 }
339
340 /*
341 * 16 byte alignment required. Rely on the fact that
342 * malloc(9) always returns the pointer aligned at least on
343 * the size of the allocation.
344 */
345 ptr = malloc(args->size + 16, M_CPUCTL, M_WAITOK);
346 if (copyin(args->data, ptr, args->size) != 0) {
347 DPRINTF("[cpuctl,%d]: copyin %p->%p of %zd bytes failed",
348 __LINE__, args->data, ptr, args->size);
349 ret = EFAULT;
350 goto fail;
351 }
352 oldcpu = td->td_oncpu;
353 is_bound = cpu_sched_is_bound(td);
354 set_cpu(cpu, td);
355 critical_enter();
356 rdmsr_safe(MSR_BIOS_SIGN, &rev0); /* Get current microcode revision. */
357
358 /*
359 * Perform update.
360 */
361 wrmsr_safe(MSR_BIOS_UPDT_TRIG, (uintptr_t)(ptr));
362 wrmsr_safe(MSR_BIOS_SIGN, 0);
363
364 /*
365 * Serialize instruction flow.
366 */
367 do_cpuid(0, tmp);
368 critical_exit();
369 rdmsr_safe(MSR_BIOS_SIGN, &rev1); /* Get new microcode revision. */
370 restore_cpu(oldcpu, is_bound, td);
371 if (rev1 > rev0)
372 ret = 0;
373 else
374 ret = EEXIST;
375fail:
376 free(ptr, M_CPUCTL);
377 return (ret);
378}
379
380static int
381update_amd(int cpu, cpuctl_update_args_t *args, struct thread *td)
382{
383 void *ptr = NULL;
384 uint32_t tmp[4];
385 int is_bound = 0;
386 int oldcpu;
387 int ret;
388
389 if (args->size == 0 || args->data == NULL) {
390 DPRINTF("[cpuctl,%d]: zero-sized firmware image", __LINE__);
391 return (EINVAL);
392 }
393 if (args->size > UCODE_SIZE_MAX) {
394 DPRINTF("[cpuctl,%d]: firmware image too large", __LINE__);
395 return (EINVAL);
396 }
397 /*
398 * XXX Might not require contignous address space - needs check
399 */
400 ptr = contigmalloc(args->size, M_CPUCTL, 0, 0, 0xffffffff, 16, 0);
401 if (ptr == NULL) {
402 DPRINTF("[cpuctl,%d]: cannot allocate %zd bytes of memory",
403 __LINE__, args->size);
404 return (ENOMEM);
405 }
406 if (copyin(args->data, ptr, args->size) != 0) {
407 DPRINTF("[cpuctl,%d]: copyin %p->%p of %zd bytes failed",
408 __LINE__, args->data, ptr, args->size);
409 ret = EFAULT;
410 goto fail;
411 }
412 oldcpu = td->td_oncpu;
413 is_bound = cpu_sched_is_bound(td);
414 set_cpu(cpu, td);
415 critical_enter();
416
417 /*
418 * Perform update.
419 */
420 wrmsr_safe(MSR_K8_UCODE_UPDATE, (uintptr_t)ptr);
421
422 /*
423 * Serialize instruction flow.
424 */
425 do_cpuid(0, tmp);
426 critical_exit();
427 restore_cpu(oldcpu, is_bound, td);
428 ret = 0;
429fail:
430 if (ptr != NULL)
431 contigfree(ptr, args->size, M_CPUCTL);
432 return (ret);
433}
434
435static int
436update_via(int cpu, cpuctl_update_args_t *args, struct thread *td)
437{
438 void *ptr;
439 uint64_t rev0, rev1, res;
440 uint32_t tmp[4];
441 int is_bound;
442 int oldcpu;
443 int ret;
444
445 if (args->size == 0 || args->data == NULL) {
446 DPRINTF("[cpuctl,%d]: zero-sized firmware image", __LINE__);
447 return (EINVAL);
448 }
449 if (args->size > UCODE_SIZE_MAX) {
450 DPRINTF("[cpuctl,%d]: firmware image too large", __LINE__);
451 return (EINVAL);
452 }
453
454 /*
455 * 4 byte alignment required.
456 */
457 ptr = malloc(args->size, M_CPUCTL, M_WAITOK);
458 if (copyin(args->data, ptr, args->size) != 0) {
459 DPRINTF("[cpuctl,%d]: copyin %p->%p of %zd bytes failed",
460 __LINE__, args->data, ptr, args->size);
461 ret = EFAULT;
462 goto fail;
463 }
464 oldcpu = td->td_oncpu;
465 is_bound = cpu_sched_is_bound(td);
466 set_cpu(cpu, td);
467 critical_enter();
468 rdmsr_safe(MSR_BIOS_SIGN, &rev0); /* Get current microcode revision. */
469
470 /*
471 * Perform update.
472 */
473 wrmsr_safe(MSR_BIOS_UPDT_TRIG, (uintptr_t)(ptr));
474 do_cpuid(1, tmp);
475
476 /*
477 * Result are in low byte of MSR FCR5:
478 * 0x00: No update has been attempted since RESET.
479 * 0x01: The last attempted update was successful.
480 * 0x02: The last attempted update was unsuccessful due to a bad
481 * environment. No update was loaded and any preexisting
482 * patches are still active.
483 * 0x03: The last attempted update was not applicable to this processor.
484 * No update was loaded and any preexisting patches are still
485 * active.
486 * 0x04: The last attempted update was not successful due to an invalid
487 * update data block. No update was loaded and any preexisting
488 * patches are still active
489 */
490 rdmsr_safe(0x1205, &res);
491 res &= 0xff;
492 critical_exit();
493 rdmsr_safe(MSR_BIOS_SIGN, &rev1); /* Get new microcode revision. */
494 restore_cpu(oldcpu, is_bound, td);
495
496 DPRINTF("[cpu,%d]: rev0=%x rev1=%x res=%x\n", __LINE__,
497 (unsigned)(rev0 >> 32), (unsigned)(rev1 >> 32), (unsigned)res);
498
499 if (res != 0x01)
500 ret = EINVAL;
501 else
502 ret = 0;
503fail:
504 free(ptr, M_CPUCTL);
505 return (ret);
506}
507
508int
509cpuctl_open(struct cdev *dev, int flags, int fmt __unused, struct thread *td)
510{
511 int ret = 0;
512 int cpu;
513
514 cpu = dev2unit(dev);
|
515 if (cpu >= mp_ncpus || !cpu_enabled(cpu)) {
| 515 if (cpu > mp_maxid || !cpu_enabled(cpu)) {
|
516 DPRINTF("[cpuctl,%d]: incorrect cpu number %d\n", __LINE__,
517 cpu);
518 return (ENXIO);
519 }
520 if (flags & FWRITE)
521 ret = securelevel_gt(td->td_ucred, 0);
522 return (ret);
523}
524
525static int
526cpuctl_modevent(module_t mod __unused, int type, void *data __unused)
527{
528 int cpu;
529
530 switch(type) {
531 case MOD_LOAD:
532 if (bootverbose)
533 printf("cpuctl: access to MSR registers/cpuid info.\n");
| 516 DPRINTF("[cpuctl,%d]: incorrect cpu number %d\n", __LINE__,
517 cpu);
518 return (ENXIO);
519 }
520 if (flags & FWRITE)
521 ret = securelevel_gt(td->td_ucred, 0);
522 return (ret);
523}
524
525static int
526cpuctl_modevent(module_t mod __unused, int type, void *data __unused)
527{
528 int cpu;
529
530 switch(type) {
531 case MOD_LOAD:
532 if (bootverbose)
533 printf("cpuctl: access to MSR registers/cpuid info.\n");
|
534 cpuctl_devs = malloc(sizeof(*cpuctl_devs) * mp_ncpus, M_CPUCTL,
| 534 cpuctl_devs = malloc(sizeof(*cpuctl_devs) * (mp_maxid + 1), M_CPUCTL,
|
535 M_WAITOK | M_ZERO);
| 535 M_WAITOK | M_ZERO);
|
536 for (cpu = 0; cpu < mp_ncpus; cpu++)
| 536 CPU_FOREACH(cpu)
|
537 if (cpu_enabled(cpu))
538 cpuctl_devs[cpu] = make_dev(&cpuctl_cdevsw, cpu,
539 UID_ROOT, GID_KMEM, 0640, "cpuctl%d", cpu);
540 break;
541 case MOD_UNLOAD:
| 537 if (cpu_enabled(cpu))
538 cpuctl_devs[cpu] = make_dev(&cpuctl_cdevsw, cpu,
539 UID_ROOT, GID_KMEM, 0640, "cpuctl%d", cpu);
540 break;
541 case MOD_UNLOAD:
|
542 for (cpu = 0; cpu < mp_ncpus; cpu++) {
| 542 CPU_FOREACH(cpu) {
|
543 if (cpuctl_devs[cpu] != NULL)
544 destroy_dev(cpuctl_devs[cpu]);
545 }
546 free(cpuctl_devs, M_CPUCTL);
547 break;
548 case MOD_SHUTDOWN:
549 break;
550 default:
551 return (EOPNOTSUPP);
552 }
553 return (0);
554}
555
556DEV_MODULE(cpuctl, cpuctl_modevent, NULL);
557MODULE_VERSION(cpuctl, CPUCTL_VERSION);
| 543 if (cpuctl_devs[cpu] != NULL)
544 destroy_dev(cpuctl_devs[cpu]);
545 }
546 free(cpuctl_devs, M_CPUCTL);
547 break;
548 case MOD_SHUTDOWN:
549 break;
550 default:
551 return (EOPNOTSUPP);
552 }
553 return (0);
554}
555
556DEV_MODULE(cpuctl, cpuctl_modevent, NULL);
557MODULE_VERSION(cpuctl, CPUCTL_VERSION);
|