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1da177e4 LT |
1 | /* |
2 | * linux/arch/arm/kernel/smp.c | |
3 | * | |
4 | * Copyright (C) 2002 ARM Limited, All Rights Reserved. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | #include <linux/config.h> | |
11 | #include <linux/delay.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/spinlock.h> | |
14 | #include <linux/sched.h> | |
15 | #include <linux/interrupt.h> | |
16 | #include <linux/cache.h> | |
17 | #include <linux/profile.h> | |
18 | #include <linux/errno.h> | |
19 | #include <linux/mm.h> | |
20 | #include <linux/cpu.h> | |
21 | #include <linux/smp.h> | |
22 | #include <linux/seq_file.h> | |
23 | ||
24 | #include <asm/atomic.h> | |
25 | #include <asm/cacheflush.h> | |
26 | #include <asm/cpu.h> | |
e65f38ed RK |
27 | #include <asm/mmu_context.h> |
28 | #include <asm/pgtable.h> | |
29 | #include <asm/pgalloc.h> | |
1da177e4 LT |
30 | #include <asm/processor.h> |
31 | #include <asm/tlbflush.h> | |
32 | #include <asm/ptrace.h> | |
33 | ||
34 | /* | |
35 | * bitmask of present and online CPUs. | |
36 | * The present bitmask indicates that the CPU is physically present. | |
37 | * The online bitmask indicates that the CPU is up and running. | |
38 | */ | |
d12734d1 | 39 | cpumask_t cpu_possible_map; |
1da177e4 LT |
40 | cpumask_t cpu_online_map; |
41 | ||
e65f38ed RK |
42 | /* |
43 | * as from 2.5, kernels no longer have an init_tasks structure | |
44 | * so we need some other way of telling a new secondary core | |
45 | * where to place its SVC stack | |
46 | */ | |
47 | struct secondary_data secondary_data; | |
48 | ||
1da177e4 LT |
49 | /* |
50 | * structures for inter-processor calls | |
51 | * - A collection of single bit ipi messages. | |
52 | */ | |
53 | struct ipi_data { | |
54 | spinlock_t lock; | |
55 | unsigned long ipi_count; | |
56 | unsigned long bits; | |
57 | }; | |
58 | ||
59 | static DEFINE_PER_CPU(struct ipi_data, ipi_data) = { | |
60 | .lock = SPIN_LOCK_UNLOCKED, | |
61 | }; | |
62 | ||
63 | enum ipi_msg_type { | |
64 | IPI_TIMER, | |
65 | IPI_RESCHEDULE, | |
66 | IPI_CALL_FUNC, | |
67 | IPI_CPU_STOP, | |
68 | }; | |
69 | ||
70 | struct smp_call_struct { | |
71 | void (*func)(void *info); | |
72 | void *info; | |
73 | int wait; | |
74 | cpumask_t pending; | |
75 | cpumask_t unfinished; | |
76 | }; | |
77 | ||
78 | static struct smp_call_struct * volatile smp_call_function_data; | |
79 | static DEFINE_SPINLOCK(smp_call_function_lock); | |
80 | ||
bd6f68af | 81 | int __cpuinit __cpu_up(unsigned int cpu) |
1da177e4 | 82 | { |
71f512e8 RK |
83 | struct cpuinfo_arm *ci = &per_cpu(cpu_data, cpu); |
84 | struct task_struct *idle = ci->idle; | |
e65f38ed RK |
85 | pgd_t *pgd; |
86 | pmd_t *pmd; | |
1da177e4 LT |
87 | int ret; |
88 | ||
89 | /* | |
71f512e8 RK |
90 | * Spawn a new process manually, if not already done. |
91 | * Grab a pointer to its task struct so we can mess with it | |
1da177e4 | 92 | */ |
71f512e8 RK |
93 | if (!idle) { |
94 | idle = fork_idle(cpu); | |
95 | if (IS_ERR(idle)) { | |
96 | printk(KERN_ERR "CPU%u: fork() failed\n", cpu); | |
97 | return PTR_ERR(idle); | |
98 | } | |
99 | ci->idle = idle; | |
1da177e4 LT |
100 | } |
101 | ||
e65f38ed RK |
102 | /* |
103 | * Allocate initial page tables to allow the new CPU to | |
104 | * enable the MMU safely. This essentially means a set | |
105 | * of our "standard" page tables, with the addition of | |
106 | * a 1:1 mapping for the physical address of the kernel. | |
107 | */ | |
108 | pgd = pgd_alloc(&init_mm); | |
109 | pmd = pmd_offset(pgd, PHYS_OFFSET); | |
110 | *pmd = __pmd((PHYS_OFFSET & PGDIR_MASK) | | |
111 | PMD_TYPE_SECT | PMD_SECT_AP_WRITE); | |
112 | ||
113 | /* | |
114 | * We need to tell the secondary core where to find | |
115 | * its stack and the page tables. | |
116 | */ | |
32d39a93 | 117 | secondary_data.stack = task_stack_page(idle) + THREAD_START_SP; |
e65f38ed RK |
118 | secondary_data.pgdir = virt_to_phys(pgd); |
119 | wmb(); | |
120 | ||
1da177e4 LT |
121 | /* |
122 | * Now bring the CPU into our world. | |
123 | */ | |
124 | ret = boot_secondary(cpu, idle); | |
e65f38ed RK |
125 | if (ret == 0) { |
126 | unsigned long timeout; | |
127 | ||
128 | /* | |
129 | * CPU was successfully started, wait for it | |
130 | * to come online or time out. | |
131 | */ | |
132 | timeout = jiffies + HZ; | |
133 | while (time_before(jiffies, timeout)) { | |
134 | if (cpu_online(cpu)) | |
135 | break; | |
136 | ||
137 | udelay(10); | |
138 | barrier(); | |
139 | } | |
140 | ||
141 | if (!cpu_online(cpu)) | |
142 | ret = -EIO; | |
143 | } | |
144 | ||
5d43045b | 145 | secondary_data.stack = NULL; |
e65f38ed RK |
146 | secondary_data.pgdir = 0; |
147 | ||
148 | *pmd_offset(pgd, PHYS_OFFSET) = __pmd(0); | |
149 | pgd_free(pgd); | |
150 | ||
1da177e4 | 151 | if (ret) { |
0908db22 RK |
152 | printk(KERN_CRIT "CPU%u: processor failed to boot\n", cpu); |
153 | ||
1da177e4 LT |
154 | /* |
155 | * FIXME: We need to clean up the new idle thread. --rmk | |
156 | */ | |
157 | } | |
158 | ||
159 | return ret; | |
160 | } | |
161 | ||
a054a811 RK |
162 | #ifdef CONFIG_HOTPLUG_CPU |
163 | /* | |
164 | * __cpu_disable runs on the processor to be shutdown. | |
165 | */ | |
166 | int __cpuexit __cpu_disable(void) | |
167 | { | |
168 | unsigned int cpu = smp_processor_id(); | |
169 | struct task_struct *p; | |
170 | int ret; | |
171 | ||
172 | ret = mach_cpu_disable(cpu); | |
173 | if (ret) | |
174 | return ret; | |
175 | ||
176 | /* | |
177 | * Take this CPU offline. Once we clear this, we can't return, | |
178 | * and we must not schedule until we're ready to give up the cpu. | |
179 | */ | |
180 | cpu_clear(cpu, cpu_online_map); | |
181 | ||
182 | /* | |
183 | * OK - migrate IRQs away from this CPU | |
184 | */ | |
185 | migrate_irqs(); | |
186 | ||
37ee16ae RK |
187 | /* |
188 | * Stop the local timer for this CPU. | |
189 | */ | |
190 | local_timer_stop(cpu); | |
191 | ||
a054a811 RK |
192 | /* |
193 | * Flush user cache and TLB mappings, and then remove this CPU | |
194 | * from the vm mask set of all processes. | |
195 | */ | |
196 | flush_cache_all(); | |
197 | local_flush_tlb_all(); | |
198 | ||
199 | read_lock(&tasklist_lock); | |
200 | for_each_process(p) { | |
201 | if (p->mm) | |
202 | cpu_clear(cpu, p->mm->cpu_vm_mask); | |
203 | } | |
204 | read_unlock(&tasklist_lock); | |
205 | ||
206 | return 0; | |
207 | } | |
208 | ||
209 | /* | |
210 | * called on the thread which is asking for a CPU to be shutdown - | |
211 | * waits until shutdown has completed, or it is timed out. | |
212 | */ | |
213 | void __cpuexit __cpu_die(unsigned int cpu) | |
214 | { | |
215 | if (!platform_cpu_kill(cpu)) | |
216 | printk("CPU%u: unable to kill\n", cpu); | |
217 | } | |
218 | ||
219 | /* | |
220 | * Called from the idle thread for the CPU which has been shutdown. | |
221 | * | |
222 | * Note that we disable IRQs here, but do not re-enable them | |
223 | * before returning to the caller. This is also the behaviour | |
224 | * of the other hotplug-cpu capable cores, so presumably coming | |
225 | * out of idle fixes this. | |
226 | */ | |
227 | void __cpuexit cpu_die(void) | |
228 | { | |
229 | unsigned int cpu = smp_processor_id(); | |
230 | ||
231 | local_irq_disable(); | |
232 | idle_task_exit(); | |
233 | ||
234 | /* | |
235 | * actual CPU shutdown procedure is at least platform (if not | |
236 | * CPU) specific | |
237 | */ | |
238 | platform_cpu_die(cpu); | |
239 | ||
240 | /* | |
241 | * Do not return to the idle loop - jump back to the secondary | |
242 | * cpu initialisation. There's some initialisation which needs | |
243 | * to be repeated to undo the effects of taking the CPU offline. | |
244 | */ | |
245 | __asm__("mov sp, %0\n" | |
246 | " b secondary_start_kernel" | |
247 | : | |
32d39a93 | 248 | : "r" (task_stack_page(current) + THREAD_SIZE - 8)); |
a054a811 RK |
249 | } |
250 | #endif /* CONFIG_HOTPLUG_CPU */ | |
251 | ||
e65f38ed RK |
252 | /* |
253 | * This is the secondary CPU boot entry. We're using this CPUs | |
254 | * idle thread stack, but a set of temporary page tables. | |
255 | */ | |
bd6f68af | 256 | asmlinkage void __cpuinit secondary_start_kernel(void) |
e65f38ed RK |
257 | { |
258 | struct mm_struct *mm = &init_mm; | |
da2660d2 | 259 | unsigned int cpu = smp_processor_id(); |
e65f38ed RK |
260 | |
261 | printk("CPU%u: Booted secondary processor\n", cpu); | |
262 | ||
263 | /* | |
264 | * All kernel threads share the same mm context; grab a | |
265 | * reference and switch to it. | |
266 | */ | |
267 | atomic_inc(&mm->mm_users); | |
268 | atomic_inc(&mm->mm_count); | |
269 | current->active_mm = mm; | |
270 | cpu_set(cpu, mm->cpu_vm_mask); | |
271 | cpu_switch_mm(mm->pgd, mm); | |
272 | enter_lazy_tlb(mm, current); | |
505d7b19 | 273 | local_flush_tlb_all(); |
e65f38ed RK |
274 | |
275 | cpu_init(); | |
5bfb5d69 | 276 | preempt_disable(); |
e65f38ed RK |
277 | |
278 | /* | |
279 | * Give the platform a chance to do its own initialisation. | |
280 | */ | |
281 | platform_secondary_init(cpu); | |
282 | ||
283 | /* | |
284 | * Enable local interrupts. | |
285 | */ | |
286 | local_irq_enable(); | |
287 | local_fiq_enable(); | |
288 | ||
289 | calibrate_delay(); | |
290 | ||
291 | smp_store_cpu_info(cpu); | |
292 | ||
293 | /* | |
294 | * OK, now it's safe to let the boot CPU continue | |
295 | */ | |
296 | cpu_set(cpu, cpu_online_map); | |
297 | ||
37ee16ae RK |
298 | /* |
299 | * Setup local timer for this CPU. | |
300 | */ | |
301 | local_timer_setup(cpu); | |
302 | ||
e65f38ed RK |
303 | /* |
304 | * OK, it's off to the idle thread for us | |
305 | */ | |
306 | cpu_idle(); | |
307 | } | |
308 | ||
1da177e4 LT |
309 | /* |
310 | * Called by both boot and secondaries to move global data into | |
311 | * per-processor storage. | |
312 | */ | |
bd6f68af | 313 | void __cpuinit smp_store_cpu_info(unsigned int cpuid) |
1da177e4 LT |
314 | { |
315 | struct cpuinfo_arm *cpu_info = &per_cpu(cpu_data, cpuid); | |
316 | ||
317 | cpu_info->loops_per_jiffy = loops_per_jiffy; | |
318 | } | |
319 | ||
320 | void __init smp_cpus_done(unsigned int max_cpus) | |
321 | { | |
322 | int cpu; | |
323 | unsigned long bogosum = 0; | |
324 | ||
325 | for_each_online_cpu(cpu) | |
326 | bogosum += per_cpu(cpu_data, cpu).loops_per_jiffy; | |
327 | ||
328 | printk(KERN_INFO "SMP: Total of %d processors activated " | |
329 | "(%lu.%02lu BogoMIPS).\n", | |
330 | num_online_cpus(), | |
331 | bogosum / (500000/HZ), | |
332 | (bogosum / (5000/HZ)) % 100); | |
333 | } | |
334 | ||
335 | void __init smp_prepare_boot_cpu(void) | |
336 | { | |
337 | unsigned int cpu = smp_processor_id(); | |
338 | ||
71f512e8 RK |
339 | per_cpu(cpu_data, cpu).idle = current; |
340 | ||
d12734d1 | 341 | cpu_set(cpu, cpu_possible_map); |
73eb7d9e | 342 | cpu_set(cpu, cpu_present_map); |
1da177e4 LT |
343 | cpu_set(cpu, cpu_online_map); |
344 | } | |
345 | ||
346 | static void send_ipi_message(cpumask_t callmap, enum ipi_msg_type msg) | |
347 | { | |
348 | unsigned long flags; | |
349 | unsigned int cpu; | |
350 | ||
351 | local_irq_save(flags); | |
352 | ||
353 | for_each_cpu_mask(cpu, callmap) { | |
354 | struct ipi_data *ipi = &per_cpu(ipi_data, cpu); | |
355 | ||
356 | spin_lock(&ipi->lock); | |
357 | ipi->bits |= 1 << msg; | |
358 | spin_unlock(&ipi->lock); | |
359 | } | |
360 | ||
361 | /* | |
362 | * Call the platform specific cross-CPU call function. | |
363 | */ | |
364 | smp_cross_call(callmap); | |
365 | ||
366 | local_irq_restore(flags); | |
367 | } | |
368 | ||
369 | /* | |
370 | * You must not call this function with disabled interrupts, from a | |
371 | * hardware interrupt handler, nor from a bottom half handler. | |
372 | */ | |
5d43045b RK |
373 | static int smp_call_function_on_cpu(void (*func)(void *info), void *info, |
374 | int retry, int wait, cpumask_t callmap) | |
1da177e4 LT |
375 | { |
376 | struct smp_call_struct data; | |
377 | unsigned long timeout; | |
378 | int ret = 0; | |
379 | ||
380 | data.func = func; | |
381 | data.info = info; | |
382 | data.wait = wait; | |
383 | ||
384 | cpu_clear(smp_processor_id(), callmap); | |
385 | if (cpus_empty(callmap)) | |
386 | goto out; | |
387 | ||
388 | data.pending = callmap; | |
389 | if (wait) | |
390 | data.unfinished = callmap; | |
391 | ||
392 | /* | |
393 | * try to get the mutex on smp_call_function_data | |
394 | */ | |
395 | spin_lock(&smp_call_function_lock); | |
396 | smp_call_function_data = &data; | |
397 | ||
398 | send_ipi_message(callmap, IPI_CALL_FUNC); | |
399 | ||
400 | timeout = jiffies + HZ; | |
401 | while (!cpus_empty(data.pending) && time_before(jiffies, timeout)) | |
402 | barrier(); | |
403 | ||
404 | /* | |
405 | * did we time out? | |
406 | */ | |
407 | if (!cpus_empty(data.pending)) { | |
408 | /* | |
409 | * this may be causing our panic - report it | |
410 | */ | |
411 | printk(KERN_CRIT | |
412 | "CPU%u: smp_call_function timeout for %p(%p)\n" | |
413 | " callmap %lx pending %lx, %swait\n", | |
273c2cdb RK |
414 | smp_processor_id(), func, info, *cpus_addr(callmap), |
415 | *cpus_addr(data.pending), wait ? "" : "no "); | |
1da177e4 LT |
416 | |
417 | /* | |
418 | * TRACE | |
419 | */ | |
420 | timeout = jiffies + (5 * HZ); | |
421 | while (!cpus_empty(data.pending) && time_before(jiffies, timeout)) | |
422 | barrier(); | |
423 | ||
424 | if (cpus_empty(data.pending)) | |
425 | printk(KERN_CRIT " RESOLVED\n"); | |
426 | else | |
427 | printk(KERN_CRIT " STILL STUCK\n"); | |
428 | } | |
429 | ||
430 | /* | |
431 | * whatever happened, we're done with the data, so release it | |
432 | */ | |
433 | smp_call_function_data = NULL; | |
434 | spin_unlock(&smp_call_function_lock); | |
435 | ||
436 | if (!cpus_empty(data.pending)) { | |
437 | ret = -ETIMEDOUT; | |
438 | goto out; | |
439 | } | |
440 | ||
441 | if (wait) | |
442 | while (!cpus_empty(data.unfinished)) | |
443 | barrier(); | |
444 | out: | |
445 | ||
446 | return 0; | |
447 | } | |
448 | ||
449 | int smp_call_function(void (*func)(void *info), void *info, int retry, | |
450 | int wait) | |
451 | { | |
452 | return smp_call_function_on_cpu(func, info, retry, wait, | |
453 | cpu_online_map); | |
454 | } | |
455 | ||
456 | void show_ipi_list(struct seq_file *p) | |
457 | { | |
458 | unsigned int cpu; | |
459 | ||
460 | seq_puts(p, "IPI:"); | |
461 | ||
e11b2236 | 462 | for_each_present_cpu(cpu) |
1da177e4 LT |
463 | seq_printf(p, " %10lu", per_cpu(ipi_data, cpu).ipi_count); |
464 | ||
465 | seq_putc(p, '\n'); | |
466 | } | |
467 | ||
37ee16ae RK |
468 | void show_local_irqs(struct seq_file *p) |
469 | { | |
470 | unsigned int cpu; | |
471 | ||
472 | seq_printf(p, "LOC: "); | |
473 | ||
474 | for_each_present_cpu(cpu) | |
475 | seq_printf(p, "%10u ", irq_stat[cpu].local_timer_irqs); | |
476 | ||
477 | seq_putc(p, '\n'); | |
478 | } | |
479 | ||
1da177e4 LT |
480 | static void ipi_timer(struct pt_regs *regs) |
481 | { | |
482 | int user = user_mode(regs); | |
483 | ||
484 | irq_enter(); | |
485 | profile_tick(CPU_PROFILING, regs); | |
486 | update_process_times(user); | |
487 | irq_exit(); | |
488 | } | |
489 | ||
37ee16ae RK |
490 | #ifdef CONFIG_LOCAL_TIMERS |
491 | asmlinkage void do_local_timer(struct pt_regs *regs) | |
492 | { | |
493 | int cpu = smp_processor_id(); | |
494 | ||
495 | if (local_timer_ack()) { | |
496 | irq_stat[cpu].local_timer_irqs++; | |
497 | ipi_timer(regs); | |
498 | } | |
499 | } | |
500 | #endif | |
501 | ||
1da177e4 LT |
502 | /* |
503 | * ipi_call_function - handle IPI from smp_call_function() | |
504 | * | |
505 | * Note that we copy data out of the cross-call structure and then | |
506 | * let the caller know that we're here and have done with their data | |
507 | */ | |
508 | static void ipi_call_function(unsigned int cpu) | |
509 | { | |
510 | struct smp_call_struct *data = smp_call_function_data; | |
511 | void (*func)(void *info) = data->func; | |
512 | void *info = data->info; | |
513 | int wait = data->wait; | |
514 | ||
515 | cpu_clear(cpu, data->pending); | |
516 | ||
517 | func(info); | |
518 | ||
519 | if (wait) | |
520 | cpu_clear(cpu, data->unfinished); | |
521 | } | |
522 | ||
523 | static DEFINE_SPINLOCK(stop_lock); | |
524 | ||
525 | /* | |
526 | * ipi_cpu_stop - handle IPI from smp_send_stop() | |
527 | */ | |
528 | static void ipi_cpu_stop(unsigned int cpu) | |
529 | { | |
530 | spin_lock(&stop_lock); | |
531 | printk(KERN_CRIT "CPU%u: stopping\n", cpu); | |
532 | dump_stack(); | |
533 | spin_unlock(&stop_lock); | |
534 | ||
535 | cpu_clear(cpu, cpu_online_map); | |
536 | ||
537 | local_fiq_disable(); | |
538 | local_irq_disable(); | |
539 | ||
540 | while (1) | |
541 | cpu_relax(); | |
542 | } | |
543 | ||
544 | /* | |
545 | * Main handler for inter-processor interrupts | |
546 | * | |
547 | * For ARM, the ipimask now only identifies a single | |
548 | * category of IPI (Bit 1 IPIs have been replaced by a | |
549 | * different mechanism): | |
550 | * | |
551 | * Bit 0 - Inter-processor function call | |
552 | */ | |
2c250134 | 553 | asmlinkage void do_IPI(struct pt_regs *regs) |
1da177e4 LT |
554 | { |
555 | unsigned int cpu = smp_processor_id(); | |
556 | struct ipi_data *ipi = &per_cpu(ipi_data, cpu); | |
557 | ||
558 | ipi->ipi_count++; | |
559 | ||
560 | for (;;) { | |
561 | unsigned long msgs; | |
562 | ||
563 | spin_lock(&ipi->lock); | |
564 | msgs = ipi->bits; | |
565 | ipi->bits = 0; | |
566 | spin_unlock(&ipi->lock); | |
567 | ||
568 | if (!msgs) | |
569 | break; | |
570 | ||
571 | do { | |
572 | unsigned nextmsg; | |
573 | ||
574 | nextmsg = msgs & -msgs; | |
575 | msgs &= ~nextmsg; | |
576 | nextmsg = ffz(~nextmsg); | |
577 | ||
578 | switch (nextmsg) { | |
579 | case IPI_TIMER: | |
580 | ipi_timer(regs); | |
581 | break; | |
582 | ||
583 | case IPI_RESCHEDULE: | |
584 | /* | |
585 | * nothing more to do - eveything is | |
586 | * done on the interrupt return path | |
587 | */ | |
588 | break; | |
589 | ||
590 | case IPI_CALL_FUNC: | |
591 | ipi_call_function(cpu); | |
592 | break; | |
593 | ||
594 | case IPI_CPU_STOP: | |
595 | ipi_cpu_stop(cpu); | |
596 | break; | |
597 | ||
598 | default: | |
599 | printk(KERN_CRIT "CPU%u: Unknown IPI message 0x%x\n", | |
600 | cpu, nextmsg); | |
601 | break; | |
602 | } | |
603 | } while (msgs); | |
604 | } | |
605 | } | |
606 | ||
607 | void smp_send_reschedule(int cpu) | |
608 | { | |
609 | send_ipi_message(cpumask_of_cpu(cpu), IPI_RESCHEDULE); | |
610 | } | |
611 | ||
612 | void smp_send_timer(void) | |
613 | { | |
614 | cpumask_t mask = cpu_online_map; | |
615 | cpu_clear(smp_processor_id(), mask); | |
616 | send_ipi_message(mask, IPI_TIMER); | |
617 | } | |
618 | ||
619 | void smp_send_stop(void) | |
620 | { | |
621 | cpumask_t mask = cpu_online_map; | |
622 | cpu_clear(smp_processor_id(), mask); | |
623 | send_ipi_message(mask, IPI_CPU_STOP); | |
624 | } | |
625 | ||
626 | /* | |
627 | * not supported here | |
628 | */ | |
629 | int __init setup_profiling_timer(unsigned int multiplier) | |
630 | { | |
631 | return -EINVAL; | |
632 | } | |
4b0ef3b1 RK |
633 | |
634 | static int | |
635 | on_each_cpu_mask(void (*func)(void *), void *info, int retry, int wait, | |
636 | cpumask_t mask) | |
637 | { | |
638 | int ret = 0; | |
639 | ||
640 | preempt_disable(); | |
641 | ||
642 | ret = smp_call_function_on_cpu(func, info, retry, wait, mask); | |
643 | if (cpu_isset(smp_processor_id(), mask)) | |
644 | func(info); | |
645 | ||
646 | preempt_enable(); | |
647 | ||
648 | return ret; | |
649 | } | |
650 | ||
651 | /**********************************************************************/ | |
652 | ||
653 | /* | |
654 | * TLB operations | |
655 | */ | |
656 | struct tlb_args { | |
657 | struct vm_area_struct *ta_vma; | |
658 | unsigned long ta_start; | |
659 | unsigned long ta_end; | |
660 | }; | |
661 | ||
662 | static inline void ipi_flush_tlb_all(void *ignored) | |
663 | { | |
664 | local_flush_tlb_all(); | |
665 | } | |
666 | ||
667 | static inline void ipi_flush_tlb_mm(void *arg) | |
668 | { | |
669 | struct mm_struct *mm = (struct mm_struct *)arg; | |
670 | ||
671 | local_flush_tlb_mm(mm); | |
672 | } | |
673 | ||
674 | static inline void ipi_flush_tlb_page(void *arg) | |
675 | { | |
676 | struct tlb_args *ta = (struct tlb_args *)arg; | |
677 | ||
678 | local_flush_tlb_page(ta->ta_vma, ta->ta_start); | |
679 | } | |
680 | ||
681 | static inline void ipi_flush_tlb_kernel_page(void *arg) | |
682 | { | |
683 | struct tlb_args *ta = (struct tlb_args *)arg; | |
684 | ||
685 | local_flush_tlb_kernel_page(ta->ta_start); | |
686 | } | |
687 | ||
688 | static inline void ipi_flush_tlb_range(void *arg) | |
689 | { | |
690 | struct tlb_args *ta = (struct tlb_args *)arg; | |
691 | ||
692 | local_flush_tlb_range(ta->ta_vma, ta->ta_start, ta->ta_end); | |
693 | } | |
694 | ||
695 | static inline void ipi_flush_tlb_kernel_range(void *arg) | |
696 | { | |
697 | struct tlb_args *ta = (struct tlb_args *)arg; | |
698 | ||
699 | local_flush_tlb_kernel_range(ta->ta_start, ta->ta_end); | |
700 | } | |
701 | ||
702 | void flush_tlb_all(void) | |
703 | { | |
704 | on_each_cpu(ipi_flush_tlb_all, NULL, 1, 1); | |
705 | } | |
706 | ||
707 | void flush_tlb_mm(struct mm_struct *mm) | |
708 | { | |
709 | cpumask_t mask = mm->cpu_vm_mask; | |
710 | ||
711 | on_each_cpu_mask(ipi_flush_tlb_mm, mm, 1, 1, mask); | |
712 | } | |
713 | ||
714 | void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr) | |
715 | { | |
716 | cpumask_t mask = vma->vm_mm->cpu_vm_mask; | |
717 | struct tlb_args ta; | |
718 | ||
719 | ta.ta_vma = vma; | |
720 | ta.ta_start = uaddr; | |
721 | ||
722 | on_each_cpu_mask(ipi_flush_tlb_page, &ta, 1, 1, mask); | |
723 | } | |
724 | ||
725 | void flush_tlb_kernel_page(unsigned long kaddr) | |
726 | { | |
727 | struct tlb_args ta; | |
728 | ||
729 | ta.ta_start = kaddr; | |
730 | ||
731 | on_each_cpu(ipi_flush_tlb_kernel_page, &ta, 1, 1); | |
732 | } | |
733 | ||
734 | void flush_tlb_range(struct vm_area_struct *vma, | |
735 | unsigned long start, unsigned long end) | |
736 | { | |
737 | cpumask_t mask = vma->vm_mm->cpu_vm_mask; | |
738 | struct tlb_args ta; | |
739 | ||
740 | ta.ta_vma = vma; | |
741 | ta.ta_start = start; | |
742 | ta.ta_end = end; | |
743 | ||
744 | on_each_cpu_mask(ipi_flush_tlb_range, &ta, 1, 1, mask); | |
745 | } | |
746 | ||
747 | void flush_tlb_kernel_range(unsigned long start, unsigned long end) | |
748 | { | |
749 | struct tlb_args ta; | |
750 | ||
751 | ta.ta_start = start; | |
752 | ta.ta_end = end; | |
753 | ||
754 | on_each_cpu(ipi_flush_tlb_kernel_range, &ta, 1, 1); | |
755 | } |