Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * SMP support for ppc. | |
3 | * | |
4 | * Written by Cort Dougan (cort@cs.nmt.edu) borrowing a great | |
5 | * deal of code from the sparc and intel versions. | |
6 | * | |
7 | * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu> | |
8 | * | |
9 | * PowerPC-64 Support added by Dave Engebretsen, Peter Bergner, and | |
10 | * Mike Corrigan {engebret|bergner|mikec}@us.ibm.com | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or | |
13 | * modify it under the terms of the GNU General Public License | |
14 | * as published by the Free Software Foundation; either version | |
15 | * 2 of the License, or (at your option) any later version. | |
16 | */ | |
17 | ||
18 | #undef DEBUG | |
19 | ||
1da177e4 LT |
20 | #include <linux/kernel.h> |
21 | #include <linux/module.h> | |
22 | #include <linux/sched.h> | |
23 | #include <linux/smp.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/delay.h> | |
26 | #include <linux/init.h> | |
27 | #include <linux/spinlock.h> | |
28 | #include <linux/cache.h> | |
29 | #include <linux/err.h> | |
30 | #include <linux/sysdev.h> | |
31 | #include <linux/cpu.h> | |
32 | #include <linux/notifier.h> | |
4b703a23 | 33 | #include <linux/topology.h> |
1da177e4 LT |
34 | |
35 | #include <asm/ptrace.h> | |
36 | #include <asm/atomic.h> | |
37 | #include <asm/irq.h> | |
38 | #include <asm/page.h> | |
39 | #include <asm/pgtable.h> | |
40 | #include <asm/prom.h> | |
41 | #include <asm/smp.h> | |
1da177e4 LT |
42 | #include <asm/time.h> |
43 | #include <asm/machdep.h> | |
44 | #include <asm/cputable.h> | |
45 | #include <asm/system.h> | |
bbeb3f4c | 46 | #include <asm/mpic.h> |
a7f290da | 47 | #include <asm/vdso_datapage.h> |
5ad57078 PM |
48 | #ifdef CONFIG_PPC64 |
49 | #include <asm/paca.h> | |
50 | #endif | |
51 | ||
1da177e4 | 52 | #ifdef DEBUG |
f9e4ec57 | 53 | #include <asm/udbg.h> |
1da177e4 LT |
54 | #define DBG(fmt...) udbg_printf(fmt) |
55 | #else | |
56 | #define DBG(fmt...) | |
57 | #endif | |
58 | ||
f9e4ec57 ME |
59 | int smp_hw_index[NR_CPUS]; |
60 | struct thread_info *secondary_ti; | |
61 | ||
1da177e4 LT |
62 | cpumask_t cpu_possible_map = CPU_MASK_NONE; |
63 | cpumask_t cpu_online_map = CPU_MASK_NONE; | |
64 | cpumask_t cpu_sibling_map[NR_CPUS] = { [0 ... NR_CPUS-1] = CPU_MASK_NONE }; | |
65 | ||
66 | EXPORT_SYMBOL(cpu_online_map); | |
67 | EXPORT_SYMBOL(cpu_possible_map); | |
36ca4ba4 | 68 | EXPORT_SYMBOL(cpu_sibling_map); |
1da177e4 | 69 | |
5ad57078 | 70 | /* SMP operations for this machine */ |
1da177e4 LT |
71 | struct smp_ops_t *smp_ops; |
72 | ||
73 | static volatile unsigned int cpu_callin_map[NR_CPUS]; | |
74 | ||
1da177e4 LT |
75 | void smp_call_function_interrupt(void); |
76 | ||
77 | int smt_enabled_at_boot = 1; | |
78 | ||
cc532915 ME |
79 | static void (*crash_ipi_function_ptr)(struct pt_regs *) = NULL; |
80 | ||
cebf589c | 81 | #ifdef CONFIG_MPIC |
1da177e4 LT |
82 | int __init smp_mpic_probe(void) |
83 | { | |
84 | int nr_cpus; | |
85 | ||
86 | DBG("smp_mpic_probe()...\n"); | |
87 | ||
88 | nr_cpus = cpus_weight(cpu_possible_map); | |
89 | ||
90 | DBG("nr_cpus: %d\n", nr_cpus); | |
91 | ||
92 | if (nr_cpus > 1) | |
93 | mpic_request_ipis(); | |
94 | ||
95 | return nr_cpus; | |
96 | } | |
97 | ||
98 | void __devinit smp_mpic_setup_cpu(int cpu) | |
99 | { | |
100 | mpic_setup_this_cpu(); | |
101 | } | |
5ad57078 | 102 | #endif /* CONFIG_MPIC */ |
1da177e4 | 103 | |
5ad57078 | 104 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
105 | void __devinit smp_generic_kick_cpu(int nr) |
106 | { | |
107 | BUG_ON(nr < 0 || nr >= NR_CPUS); | |
108 | ||
109 | /* | |
110 | * The processor is currently spinning, waiting for the | |
111 | * cpu_start field to become non-zero After we set cpu_start, | |
112 | * the processor will continue on to secondary_start | |
113 | */ | |
114 | paca[nr].cpu_start = 1; | |
0d8d4d42 | 115 | smp_mb(); |
1da177e4 | 116 | } |
5ad57078 | 117 | #endif |
1da177e4 | 118 | |
7d12e780 | 119 | void smp_message_recv(int msg) |
1da177e4 LT |
120 | { |
121 | switch(msg) { | |
122 | case PPC_MSG_CALL_FUNCTION: | |
123 | smp_call_function_interrupt(); | |
124 | break; | |
5ad57078 | 125 | case PPC_MSG_RESCHEDULE: |
1da177e4 LT |
126 | /* XXX Do we have to do this? */ |
127 | set_need_resched(); | |
128 | break; | |
1da177e4 | 129 | case PPC_MSG_DEBUGGER_BREAK: |
cc532915 | 130 | if (crash_ipi_function_ptr) { |
7d12e780 | 131 | crash_ipi_function_ptr(get_irq_regs()); |
cc532915 ME |
132 | break; |
133 | } | |
134 | #ifdef CONFIG_DEBUGGER | |
7d12e780 | 135 | debugger_ipi(get_irq_regs()); |
1da177e4 | 136 | break; |
cc532915 ME |
137 | #endif /* CONFIG_DEBUGGER */ |
138 | /* FALLTHROUGH */ | |
1da177e4 LT |
139 | default: |
140 | printk("SMP %d: smp_message_recv(): unknown msg %d\n", | |
141 | smp_processor_id(), msg); | |
142 | break; | |
143 | } | |
144 | } | |
145 | ||
146 | void smp_send_reschedule(int cpu) | |
147 | { | |
8cffc6ac BH |
148 | if (likely(smp_ops)) |
149 | smp_ops->message_pass(cpu, PPC_MSG_RESCHEDULE); | |
1da177e4 LT |
150 | } |
151 | ||
152 | #ifdef CONFIG_DEBUGGER | |
153 | void smp_send_debugger_break(int cpu) | |
154 | { | |
8cffc6ac BH |
155 | if (likely(smp_ops)) |
156 | smp_ops->message_pass(cpu, PPC_MSG_DEBUGGER_BREAK); | |
1da177e4 LT |
157 | } |
158 | #endif | |
159 | ||
cc532915 ME |
160 | #ifdef CONFIG_KEXEC |
161 | void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *)) | |
162 | { | |
163 | crash_ipi_function_ptr = crash_ipi_callback; | |
8cffc6ac | 164 | if (crash_ipi_callback && smp_ops) { |
cc532915 ME |
165 | mb(); |
166 | smp_ops->message_pass(MSG_ALL_BUT_SELF, PPC_MSG_DEBUGGER_BREAK); | |
167 | } | |
168 | } | |
169 | #endif | |
170 | ||
1da177e4 LT |
171 | static void stop_this_cpu(void *dummy) |
172 | { | |
173 | local_irq_disable(); | |
174 | while (1) | |
175 | ; | |
176 | } | |
177 | ||
178 | void smp_send_stop(void) | |
179 | { | |
180 | smp_call_function(stop_this_cpu, NULL, 1, 0); | |
181 | } | |
182 | ||
183 | /* | |
184 | * Structure and data for smp_call_function(). This is designed to minimise | |
185 | * static memory requirements. It also looks cleaner. | |
186 | * Stolen from the i386 version. | |
187 | */ | |
188 | static __cacheline_aligned_in_smp DEFINE_SPINLOCK(call_lock); | |
189 | ||
190 | static struct call_data_struct { | |
191 | void (*func) (void *info); | |
192 | void *info; | |
193 | atomic_t started; | |
194 | atomic_t finished; | |
195 | int wait; | |
196 | } *call_data; | |
197 | ||
5ad57078 PM |
198 | /* delay of at least 8 seconds */ |
199 | #define SMP_CALL_TIMEOUT 8 | |
1da177e4 LT |
200 | |
201 | /* | |
202 | * This function sends a 'generic call function' IPI to all other CPUs | |
203 | * in the system. | |
204 | * | |
205 | * [SUMMARY] Run a function on all other CPUs. | |
206 | * <func> The function to run. This must be fast and non-blocking. | |
207 | * <info> An arbitrary pointer to pass to the function. | |
208 | * <nonatomic> currently unused. | |
209 | * <wait> If true, wait (atomically) until function has completed on other CPUs. | |
210 | * [RETURNS] 0 on success, else a negative status code. Does not return until | |
211 | * remote CPUs are nearly ready to execute <<func>> or are or have executed. | |
212 | * | |
213 | * You must not call this function with disabled interrupts or from a | |
214 | * hardware interrupt handler or from a bottom half handler. | |
215 | */ | |
216 | int smp_call_function (void (*func) (void *info), void *info, int nonatomic, | |
217 | int wait) | |
218 | { | |
219 | struct call_data_struct data; | |
220 | int ret = -1, cpus; | |
5ad57078 | 221 | u64 timeout; |
1da177e4 LT |
222 | |
223 | /* Can deadlock when called with interrupts disabled */ | |
224 | WARN_ON(irqs_disabled()); | |
225 | ||
8cffc6ac BH |
226 | if (unlikely(smp_ops == NULL)) |
227 | return -1; | |
228 | ||
1da177e4 LT |
229 | data.func = func; |
230 | data.info = info; | |
231 | atomic_set(&data.started, 0); | |
232 | data.wait = wait; | |
233 | if (wait) | |
234 | atomic_set(&data.finished, 0); | |
235 | ||
236 | spin_lock(&call_lock); | |
237 | /* Must grab online cpu count with preempt disabled, otherwise | |
238 | * it can change. */ | |
239 | cpus = num_online_cpus() - 1; | |
240 | if (!cpus) { | |
241 | ret = 0; | |
242 | goto out; | |
243 | } | |
244 | ||
245 | call_data = &data; | |
0d8d4d42 | 246 | smp_wmb(); |
1da177e4 LT |
247 | /* Send a message to all other CPUs and wait for them to respond */ |
248 | smp_ops->message_pass(MSG_ALL_BUT_SELF, PPC_MSG_CALL_FUNCTION); | |
249 | ||
5ad57078 PM |
250 | timeout = get_tb() + (u64) SMP_CALL_TIMEOUT * tb_ticks_per_sec; |
251 | ||
1da177e4 | 252 | /* Wait for response */ |
1da177e4 LT |
253 | while (atomic_read(&data.started) != cpus) { |
254 | HMT_low(); | |
5ad57078 | 255 | if (get_tb() >= timeout) { |
1da177e4 LT |
256 | printk("smp_call_function on cpu %d: other cpus not " |
257 | "responding (%d)\n", smp_processor_id(), | |
258 | atomic_read(&data.started)); | |
259 | debugger(NULL); | |
260 | goto out; | |
261 | } | |
262 | } | |
263 | ||
264 | if (wait) { | |
1da177e4 LT |
265 | while (atomic_read(&data.finished) != cpus) { |
266 | HMT_low(); | |
5ad57078 | 267 | if (get_tb() >= timeout) { |
1da177e4 LT |
268 | printk("smp_call_function on cpu %d: other " |
269 | "cpus not finishing (%d/%d)\n", | |
270 | smp_processor_id(), | |
271 | atomic_read(&data.finished), | |
272 | atomic_read(&data.started)); | |
273 | debugger(NULL); | |
274 | goto out; | |
275 | } | |
276 | } | |
277 | } | |
278 | ||
279 | ret = 0; | |
280 | ||
5ad57078 | 281 | out: |
1da177e4 LT |
282 | call_data = NULL; |
283 | HMT_medium(); | |
284 | spin_unlock(&call_lock); | |
285 | return ret; | |
286 | } | |
287 | ||
288 | EXPORT_SYMBOL(smp_call_function); | |
289 | ||
290 | void smp_call_function_interrupt(void) | |
291 | { | |
292 | void (*func) (void *info); | |
293 | void *info; | |
294 | int wait; | |
295 | ||
296 | /* call_data will be NULL if the sender timed out while | |
297 | * waiting on us to receive the call. | |
298 | */ | |
299 | if (!call_data) | |
300 | return; | |
301 | ||
302 | func = call_data->func; | |
303 | info = call_data->info; | |
304 | wait = call_data->wait; | |
305 | ||
306 | if (!wait) | |
307 | smp_mb__before_atomic_inc(); | |
308 | ||
309 | /* | |
310 | * Notify initiating CPU that I've grabbed the data and am | |
311 | * about to execute the function | |
312 | */ | |
313 | atomic_inc(&call_data->started); | |
314 | /* | |
315 | * At this point the info structure may be out of scope unless wait==1 | |
316 | */ | |
317 | (*func)(info); | |
318 | if (wait) { | |
319 | smp_mb__before_atomic_inc(); | |
320 | atomic_inc(&call_data->finished); | |
321 | } | |
322 | } | |
323 | ||
1da177e4 LT |
324 | extern struct gettimeofday_struct do_gtod; |
325 | ||
326 | struct thread_info *current_set[NR_CPUS]; | |
327 | ||
328 | DECLARE_PER_CPU(unsigned int, pvr); | |
329 | ||
330 | static void __devinit smp_store_cpu_info(int id) | |
331 | { | |
332 | per_cpu(pvr, id) = mfspr(SPRN_PVR); | |
333 | } | |
334 | ||
335 | static void __init smp_create_idle(unsigned int cpu) | |
336 | { | |
337 | struct task_struct *p; | |
338 | ||
339 | /* create a process for the processor */ | |
340 | p = fork_idle(cpu); | |
341 | if (IS_ERR(p)) | |
342 | panic("failed fork for CPU %u: %li", cpu, PTR_ERR(p)); | |
5ad57078 | 343 | #ifdef CONFIG_PPC64 |
1da177e4 | 344 | paca[cpu].__current = p; |
5ad57078 | 345 | #endif |
b5e2fc1c AV |
346 | current_set[cpu] = task_thread_info(p); |
347 | task_thread_info(p)->cpu = cpu; | |
1da177e4 LT |
348 | } |
349 | ||
350 | void __init smp_prepare_cpus(unsigned int max_cpus) | |
351 | { | |
352 | unsigned int cpu; | |
353 | ||
354 | DBG("smp_prepare_cpus\n"); | |
355 | ||
356 | /* | |
357 | * setup_cpu may need to be called on the boot cpu. We havent | |
358 | * spun any cpus up but lets be paranoid. | |
359 | */ | |
360 | BUG_ON(boot_cpuid != smp_processor_id()); | |
361 | ||
362 | /* Fixup boot cpu */ | |
363 | smp_store_cpu_info(boot_cpuid); | |
364 | cpu_callin_map[boot_cpuid] = 1; | |
365 | ||
8cffc6ac BH |
366 | if (smp_ops) |
367 | max_cpus = smp_ops->probe(); | |
368 | else | |
369 | max_cpus = 1; | |
1da177e4 LT |
370 | |
371 | smp_space_timers(max_cpus); | |
372 | ||
0e551954 | 373 | for_each_possible_cpu(cpu) |
1da177e4 LT |
374 | if (cpu != boot_cpuid) |
375 | smp_create_idle(cpu); | |
376 | } | |
377 | ||
378 | void __devinit smp_prepare_boot_cpu(void) | |
379 | { | |
380 | BUG_ON(smp_processor_id() != boot_cpuid); | |
381 | ||
382 | cpu_set(boot_cpuid, cpu_online_map); | |
5ad57078 | 383 | #ifdef CONFIG_PPC64 |
1da177e4 | 384 | paca[boot_cpuid].__current = current; |
5ad57078 | 385 | #endif |
b5e2fc1c | 386 | current_set[boot_cpuid] = task_thread_info(current); |
1da177e4 LT |
387 | } |
388 | ||
389 | #ifdef CONFIG_HOTPLUG_CPU | |
390 | /* State of each CPU during hotplug phases */ | |
391 | DEFINE_PER_CPU(int, cpu_state) = { 0 }; | |
392 | ||
393 | int generic_cpu_disable(void) | |
394 | { | |
395 | unsigned int cpu = smp_processor_id(); | |
396 | ||
397 | if (cpu == boot_cpuid) | |
398 | return -EBUSY; | |
399 | ||
1da177e4 | 400 | cpu_clear(cpu, cpu_online_map); |
799d6046 | 401 | #ifdef CONFIG_PPC64 |
a7f290da | 402 | vdso_data->processorCount--; |
1da177e4 | 403 | fixup_irqs(cpu_online_map); |
094fe2e7 | 404 | #endif |
1da177e4 LT |
405 | return 0; |
406 | } | |
407 | ||
408 | int generic_cpu_enable(unsigned int cpu) | |
409 | { | |
410 | /* Do the normal bootup if we haven't | |
411 | * already bootstrapped. */ | |
412 | if (system_state != SYSTEM_RUNNING) | |
413 | return -ENOSYS; | |
414 | ||
415 | /* get the target out of it's holding state */ | |
416 | per_cpu(cpu_state, cpu) = CPU_UP_PREPARE; | |
0d8d4d42 | 417 | smp_wmb(); |
1da177e4 LT |
418 | |
419 | while (!cpu_online(cpu)) | |
420 | cpu_relax(); | |
421 | ||
094fe2e7 | 422 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
423 | fixup_irqs(cpu_online_map); |
424 | /* counter the irq disable in fixup_irqs */ | |
425 | local_irq_enable(); | |
094fe2e7 | 426 | #endif |
1da177e4 LT |
427 | return 0; |
428 | } | |
429 | ||
430 | void generic_cpu_die(unsigned int cpu) | |
431 | { | |
432 | int i; | |
433 | ||
434 | for (i = 0; i < 100; i++) { | |
0d8d4d42 | 435 | smp_rmb(); |
1da177e4 LT |
436 | if (per_cpu(cpu_state, cpu) == CPU_DEAD) |
437 | return; | |
438 | msleep(100); | |
439 | } | |
440 | printk(KERN_ERR "CPU%d didn't die...\n", cpu); | |
441 | } | |
442 | ||
443 | void generic_mach_cpu_die(void) | |
444 | { | |
445 | unsigned int cpu; | |
446 | ||
447 | local_irq_disable(); | |
448 | cpu = smp_processor_id(); | |
449 | printk(KERN_DEBUG "CPU%d offline\n", cpu); | |
450 | __get_cpu_var(cpu_state) = CPU_DEAD; | |
0d8d4d42 | 451 | smp_wmb(); |
1da177e4 LT |
452 | while (__get_cpu_var(cpu_state) != CPU_UP_PREPARE) |
453 | cpu_relax(); | |
454 | ||
094fe2e7 | 455 | #ifdef CONFIG_PPC64 |
1da177e4 | 456 | flush_tlb_pending(); |
094fe2e7 | 457 | #endif |
1da177e4 LT |
458 | cpu_set(cpu, cpu_online_map); |
459 | local_irq_enable(); | |
460 | } | |
461 | #endif | |
462 | ||
463 | static int __devinit cpu_enable(unsigned int cpu) | |
464 | { | |
8cffc6ac | 465 | if (smp_ops && smp_ops->cpu_enable) |
1da177e4 LT |
466 | return smp_ops->cpu_enable(cpu); |
467 | ||
468 | return -ENOSYS; | |
469 | } | |
470 | ||
471 | int __devinit __cpu_up(unsigned int cpu) | |
472 | { | |
473 | int c; | |
474 | ||
5ad57078 | 475 | secondary_ti = current_set[cpu]; |
1da177e4 LT |
476 | if (!cpu_enable(cpu)) |
477 | return 0; | |
478 | ||
8cffc6ac BH |
479 | if (smp_ops == NULL || |
480 | (smp_ops->cpu_bootable && !smp_ops->cpu_bootable(cpu))) | |
1da177e4 LT |
481 | return -EINVAL; |
482 | ||
1da177e4 LT |
483 | /* Make sure callin-map entry is 0 (can be leftover a CPU |
484 | * hotplug | |
485 | */ | |
486 | cpu_callin_map[cpu] = 0; | |
487 | ||
488 | /* The information for processor bringup must | |
489 | * be written out to main store before we release | |
490 | * the processor. | |
491 | */ | |
0d8d4d42 | 492 | smp_mb(); |
1da177e4 LT |
493 | |
494 | /* wake up cpus */ | |
495 | DBG("smp: kicking cpu %d\n", cpu); | |
496 | smp_ops->kick_cpu(cpu); | |
497 | ||
498 | /* | |
499 | * wait to see if the cpu made a callin (is actually up). | |
500 | * use this value that I found through experimentation. | |
501 | * -- Cort | |
502 | */ | |
503 | if (system_state < SYSTEM_RUNNING) | |
ee0339f2 | 504 | for (c = 50000; c && !cpu_callin_map[cpu]; c--) |
1da177e4 LT |
505 | udelay(100); |
506 | #ifdef CONFIG_HOTPLUG_CPU | |
507 | else | |
508 | /* | |
509 | * CPUs can take much longer to come up in the | |
510 | * hotplug case. Wait five seconds. | |
511 | */ | |
512 | for (c = 25; c && !cpu_callin_map[cpu]; c--) { | |
513 | msleep(200); | |
514 | } | |
515 | #endif | |
516 | ||
517 | if (!cpu_callin_map[cpu]) { | |
518 | printk("Processor %u is stuck.\n", cpu); | |
519 | return -ENOENT; | |
520 | } | |
521 | ||
522 | printk("Processor %u found.\n", cpu); | |
523 | ||
524 | if (smp_ops->give_timebase) | |
525 | smp_ops->give_timebase(); | |
526 | ||
527 | /* Wait until cpu puts itself in the online map */ | |
528 | while (!cpu_online(cpu)) | |
529 | cpu_relax(); | |
530 | ||
531 | return 0; | |
532 | } | |
533 | ||
534 | ||
535 | /* Activate a secondary processor. */ | |
536 | int __devinit start_secondary(void *unused) | |
537 | { | |
538 | unsigned int cpu = smp_processor_id(); | |
539 | ||
540 | atomic_inc(&init_mm.mm_count); | |
541 | current->active_mm = &init_mm; | |
542 | ||
543 | smp_store_cpu_info(cpu); | |
5ad57078 | 544 | set_dec(tb_ticks_per_jiffy); |
e4d76e1c | 545 | preempt_disable(); |
1da177e4 LT |
546 | cpu_callin_map[cpu] = 1; |
547 | ||
548 | smp_ops->setup_cpu(cpu); | |
549 | if (smp_ops->take_timebase) | |
550 | smp_ops->take_timebase(); | |
551 | ||
7d4d6154 | 552 | if (system_state > SYSTEM_BOOTING) |
c6622f63 | 553 | snapshot_timebase(); |
7d4d6154 | 554 | |
1da177e4 LT |
555 | spin_lock(&call_lock); |
556 | cpu_set(cpu, cpu_online_map); | |
557 | spin_unlock(&call_lock); | |
558 | ||
559 | local_irq_enable(); | |
560 | ||
561 | cpu_idle(); | |
562 | return 0; | |
563 | } | |
564 | ||
565 | int setup_profiling_timer(unsigned int multiplier) | |
566 | { | |
567 | return 0; | |
568 | } | |
569 | ||
570 | void __init smp_cpus_done(unsigned int max_cpus) | |
571 | { | |
572 | cpumask_t old_mask; | |
573 | ||
574 | /* We want the setup_cpu() here to be called from CPU 0, but our | |
575 | * init thread may have been "borrowed" by another CPU in the meantime | |
576 | * se we pin us down to CPU 0 for a short while | |
577 | */ | |
578 | old_mask = current->cpus_allowed; | |
579 | set_cpus_allowed(current, cpumask_of_cpu(boot_cpuid)); | |
580 | ||
8cffc6ac BH |
581 | if (smp_ops) |
582 | smp_ops->setup_cpu(boot_cpuid); | |
1da177e4 LT |
583 | |
584 | set_cpus_allowed(current, old_mask); | |
4b703a23 | 585 | |
c6622f63 PM |
586 | snapshot_timebases(); |
587 | ||
4b703a23 | 588 | dump_numa_cpu_topology(); |
1da177e4 LT |
589 | } |
590 | ||
591 | #ifdef CONFIG_HOTPLUG_CPU | |
592 | int __cpu_disable(void) | |
593 | { | |
594 | if (smp_ops->cpu_disable) | |
595 | return smp_ops->cpu_disable(); | |
596 | ||
597 | return -ENOSYS; | |
598 | } | |
599 | ||
600 | void __cpu_die(unsigned int cpu) | |
601 | { | |
602 | if (smp_ops->cpu_die) | |
603 | smp_ops->cpu_die(cpu); | |
604 | } | |
605 | #endif |