]>
Commit | Line | Data |
---|---|---|
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 | */ | |
7db078be | 117 | secondary_data.stack = (void *)idle->thread_info + 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 | : | |
248 | : "r" ((void *)current->thread_info + THREAD_SIZE - 8)); | |
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; | |
5bfb5d69 NP |
259 | unsigned int cpu; |
260 | ||
261 | cpu = smp_processor_id(); | |
e65f38ed RK |
262 | |
263 | printk("CPU%u: Booted secondary processor\n", cpu); | |
264 | ||
265 | /* | |
266 | * All kernel threads share the same mm context; grab a | |
267 | * reference and switch to it. | |
268 | */ | |
269 | atomic_inc(&mm->mm_users); | |
270 | atomic_inc(&mm->mm_count); | |
271 | current->active_mm = mm; | |
272 | cpu_set(cpu, mm->cpu_vm_mask); | |
273 | cpu_switch_mm(mm->pgd, mm); | |
274 | enter_lazy_tlb(mm, current); | |
505d7b19 | 275 | local_flush_tlb_all(); |
e65f38ed RK |
276 | |
277 | cpu_init(); | |
5bfb5d69 | 278 | preempt_disable(); |
e65f38ed RK |
279 | |
280 | /* | |
281 | * Give the platform a chance to do its own initialisation. | |
282 | */ | |
283 | platform_secondary_init(cpu); | |
284 | ||
285 | /* | |
286 | * Enable local interrupts. | |
287 | */ | |
288 | local_irq_enable(); | |
289 | local_fiq_enable(); | |
290 | ||
291 | calibrate_delay(); | |
292 | ||
293 | smp_store_cpu_info(cpu); | |
294 | ||
295 | /* | |
296 | * OK, now it's safe to let the boot CPU continue | |
297 | */ | |
298 | cpu_set(cpu, cpu_online_map); | |
299 | ||
37ee16ae RK |
300 | /* |
301 | * Setup local timer for this CPU. | |
302 | */ | |
303 | local_timer_setup(cpu); | |
304 | ||
e65f38ed RK |
305 | /* |
306 | * OK, it's off to the idle thread for us | |
307 | */ | |
308 | cpu_idle(); | |
309 | } | |
310 | ||
1da177e4 LT |
311 | /* |
312 | * Called by both boot and secondaries to move global data into | |
313 | * per-processor storage. | |
314 | */ | |
bd6f68af | 315 | void __cpuinit smp_store_cpu_info(unsigned int cpuid) |
1da177e4 LT |
316 | { |
317 | struct cpuinfo_arm *cpu_info = &per_cpu(cpu_data, cpuid); | |
318 | ||
319 | cpu_info->loops_per_jiffy = loops_per_jiffy; | |
320 | } | |
321 | ||
322 | void __init smp_cpus_done(unsigned int max_cpus) | |
323 | { | |
324 | int cpu; | |
325 | unsigned long bogosum = 0; | |
326 | ||
327 | for_each_online_cpu(cpu) | |
328 | bogosum += per_cpu(cpu_data, cpu).loops_per_jiffy; | |
329 | ||
330 | printk(KERN_INFO "SMP: Total of %d processors activated " | |
331 | "(%lu.%02lu BogoMIPS).\n", | |
332 | num_online_cpus(), | |
333 | bogosum / (500000/HZ), | |
334 | (bogosum / (5000/HZ)) % 100); | |
335 | } | |
336 | ||
337 | void __init smp_prepare_boot_cpu(void) | |
338 | { | |
339 | unsigned int cpu = smp_processor_id(); | |
340 | ||
71f512e8 RK |
341 | per_cpu(cpu_data, cpu).idle = current; |
342 | ||
d12734d1 | 343 | cpu_set(cpu, cpu_possible_map); |
73eb7d9e | 344 | cpu_set(cpu, cpu_present_map); |
1da177e4 LT |
345 | cpu_set(cpu, cpu_online_map); |
346 | } | |
347 | ||
348 | static void send_ipi_message(cpumask_t callmap, enum ipi_msg_type msg) | |
349 | { | |
350 | unsigned long flags; | |
351 | unsigned int cpu; | |
352 | ||
353 | local_irq_save(flags); | |
354 | ||
355 | for_each_cpu_mask(cpu, callmap) { | |
356 | struct ipi_data *ipi = &per_cpu(ipi_data, cpu); | |
357 | ||
358 | spin_lock(&ipi->lock); | |
359 | ipi->bits |= 1 << msg; | |
360 | spin_unlock(&ipi->lock); | |
361 | } | |
362 | ||
363 | /* | |
364 | * Call the platform specific cross-CPU call function. | |
365 | */ | |
366 | smp_cross_call(callmap); | |
367 | ||
368 | local_irq_restore(flags); | |
369 | } | |
370 | ||
371 | /* | |
372 | * You must not call this function with disabled interrupts, from a | |
373 | * hardware interrupt handler, nor from a bottom half handler. | |
374 | */ | |
5d43045b RK |
375 | static int smp_call_function_on_cpu(void (*func)(void *info), void *info, |
376 | int retry, int wait, cpumask_t callmap) | |
1da177e4 LT |
377 | { |
378 | struct smp_call_struct data; | |
379 | unsigned long timeout; | |
380 | int ret = 0; | |
381 | ||
382 | data.func = func; | |
383 | data.info = info; | |
384 | data.wait = wait; | |
385 | ||
386 | cpu_clear(smp_processor_id(), callmap); | |
387 | if (cpus_empty(callmap)) | |
388 | goto out; | |
389 | ||
390 | data.pending = callmap; | |
391 | if (wait) | |
392 | data.unfinished = callmap; | |
393 | ||
394 | /* | |
395 | * try to get the mutex on smp_call_function_data | |
396 | */ | |
397 | spin_lock(&smp_call_function_lock); | |
398 | smp_call_function_data = &data; | |
399 | ||
400 | send_ipi_message(callmap, IPI_CALL_FUNC); | |
401 | ||
402 | timeout = jiffies + HZ; | |
403 | while (!cpus_empty(data.pending) && time_before(jiffies, timeout)) | |
404 | barrier(); | |
405 | ||
406 | /* | |
407 | * did we time out? | |
408 | */ | |
409 | if (!cpus_empty(data.pending)) { | |
410 | /* | |
411 | * this may be causing our panic - report it | |
412 | */ | |
413 | printk(KERN_CRIT | |
414 | "CPU%u: smp_call_function timeout for %p(%p)\n" | |
415 | " callmap %lx pending %lx, %swait\n", | |
273c2cdb RK |
416 | smp_processor_id(), func, info, *cpus_addr(callmap), |
417 | *cpus_addr(data.pending), wait ? "" : "no "); | |
1da177e4 LT |
418 | |
419 | /* | |
420 | * TRACE | |
421 | */ | |
422 | timeout = jiffies + (5 * HZ); | |
423 | while (!cpus_empty(data.pending) && time_before(jiffies, timeout)) | |
424 | barrier(); | |
425 | ||
426 | if (cpus_empty(data.pending)) | |
427 | printk(KERN_CRIT " RESOLVED\n"); | |
428 | else | |
429 | printk(KERN_CRIT " STILL STUCK\n"); | |
430 | } | |
431 | ||
432 | /* | |
433 | * whatever happened, we're done with the data, so release it | |
434 | */ | |
435 | smp_call_function_data = NULL; | |
436 | spin_unlock(&smp_call_function_lock); | |
437 | ||
438 | if (!cpus_empty(data.pending)) { | |
439 | ret = -ETIMEDOUT; | |
440 | goto out; | |
441 | } | |
442 | ||
443 | if (wait) | |
444 | while (!cpus_empty(data.unfinished)) | |
445 | barrier(); | |
446 | out: | |
447 | ||
448 | return 0; | |
449 | } | |
450 | ||
451 | int smp_call_function(void (*func)(void *info), void *info, int retry, | |
452 | int wait) | |
453 | { | |
454 | return smp_call_function_on_cpu(func, info, retry, wait, | |
455 | cpu_online_map); | |
456 | } | |
457 | ||
458 | void show_ipi_list(struct seq_file *p) | |
459 | { | |
460 | unsigned int cpu; | |
461 | ||
462 | seq_puts(p, "IPI:"); | |
463 | ||
e11b2236 | 464 | for_each_present_cpu(cpu) |
1da177e4 LT |
465 | seq_printf(p, " %10lu", per_cpu(ipi_data, cpu).ipi_count); |
466 | ||
467 | seq_putc(p, '\n'); | |
468 | } | |
469 | ||
37ee16ae RK |
470 | void show_local_irqs(struct seq_file *p) |
471 | { | |
472 | unsigned int cpu; | |
473 | ||
474 | seq_printf(p, "LOC: "); | |
475 | ||
476 | for_each_present_cpu(cpu) | |
477 | seq_printf(p, "%10u ", irq_stat[cpu].local_timer_irqs); | |
478 | ||
479 | seq_putc(p, '\n'); | |
480 | } | |
481 | ||
1da177e4 LT |
482 | static void ipi_timer(struct pt_regs *regs) |
483 | { | |
484 | int user = user_mode(regs); | |
485 | ||
486 | irq_enter(); | |
487 | profile_tick(CPU_PROFILING, regs); | |
488 | update_process_times(user); | |
489 | irq_exit(); | |
490 | } | |
491 | ||
37ee16ae RK |
492 | #ifdef CONFIG_LOCAL_TIMERS |
493 | asmlinkage void do_local_timer(struct pt_regs *regs) | |
494 | { | |
495 | int cpu = smp_processor_id(); | |
496 | ||
497 | if (local_timer_ack()) { | |
498 | irq_stat[cpu].local_timer_irqs++; | |
499 | ipi_timer(regs); | |
500 | } | |
501 | } | |
502 | #endif | |
503 | ||
1da177e4 LT |
504 | /* |
505 | * ipi_call_function - handle IPI from smp_call_function() | |
506 | * | |
507 | * Note that we copy data out of the cross-call structure and then | |
508 | * let the caller know that we're here and have done with their data | |
509 | */ | |
510 | static void ipi_call_function(unsigned int cpu) | |
511 | { | |
512 | struct smp_call_struct *data = smp_call_function_data; | |
513 | void (*func)(void *info) = data->func; | |
514 | void *info = data->info; | |
515 | int wait = data->wait; | |
516 | ||
517 | cpu_clear(cpu, data->pending); | |
518 | ||
519 | func(info); | |
520 | ||
521 | if (wait) | |
522 | cpu_clear(cpu, data->unfinished); | |
523 | } | |
524 | ||
525 | static DEFINE_SPINLOCK(stop_lock); | |
526 | ||
527 | /* | |
528 | * ipi_cpu_stop - handle IPI from smp_send_stop() | |
529 | */ | |
530 | static void ipi_cpu_stop(unsigned int cpu) | |
531 | { | |
532 | spin_lock(&stop_lock); | |
533 | printk(KERN_CRIT "CPU%u: stopping\n", cpu); | |
534 | dump_stack(); | |
535 | spin_unlock(&stop_lock); | |
536 | ||
537 | cpu_clear(cpu, cpu_online_map); | |
538 | ||
539 | local_fiq_disable(); | |
540 | local_irq_disable(); | |
541 | ||
542 | while (1) | |
543 | cpu_relax(); | |
544 | } | |
545 | ||
546 | /* | |
547 | * Main handler for inter-processor interrupts | |
548 | * | |
549 | * For ARM, the ipimask now only identifies a single | |
550 | * category of IPI (Bit 1 IPIs have been replaced by a | |
551 | * different mechanism): | |
552 | * | |
553 | * Bit 0 - Inter-processor function call | |
554 | */ | |
2c250134 | 555 | asmlinkage void do_IPI(struct pt_regs *regs) |
1da177e4 LT |
556 | { |
557 | unsigned int cpu = smp_processor_id(); | |
558 | struct ipi_data *ipi = &per_cpu(ipi_data, cpu); | |
559 | ||
560 | ipi->ipi_count++; | |
561 | ||
562 | for (;;) { | |
563 | unsigned long msgs; | |
564 | ||
565 | spin_lock(&ipi->lock); | |
566 | msgs = ipi->bits; | |
567 | ipi->bits = 0; | |
568 | spin_unlock(&ipi->lock); | |
569 | ||
570 | if (!msgs) | |
571 | break; | |
572 | ||
573 | do { | |
574 | unsigned nextmsg; | |
575 | ||
576 | nextmsg = msgs & -msgs; | |
577 | msgs &= ~nextmsg; | |
578 | nextmsg = ffz(~nextmsg); | |
579 | ||
580 | switch (nextmsg) { | |
581 | case IPI_TIMER: | |
582 | ipi_timer(regs); | |
583 | break; | |
584 | ||
585 | case IPI_RESCHEDULE: | |
586 | /* | |
587 | * nothing more to do - eveything is | |
588 | * done on the interrupt return path | |
589 | */ | |
590 | break; | |
591 | ||
592 | case IPI_CALL_FUNC: | |
593 | ipi_call_function(cpu); | |
594 | break; | |
595 | ||
596 | case IPI_CPU_STOP: | |
597 | ipi_cpu_stop(cpu); | |
598 | break; | |
599 | ||
600 | default: | |
601 | printk(KERN_CRIT "CPU%u: Unknown IPI message 0x%x\n", | |
602 | cpu, nextmsg); | |
603 | break; | |
604 | } | |
605 | } while (msgs); | |
606 | } | |
607 | } | |
608 | ||
609 | void smp_send_reschedule(int cpu) | |
610 | { | |
611 | send_ipi_message(cpumask_of_cpu(cpu), IPI_RESCHEDULE); | |
612 | } | |
613 | ||
614 | void smp_send_timer(void) | |
615 | { | |
616 | cpumask_t mask = cpu_online_map; | |
617 | cpu_clear(smp_processor_id(), mask); | |
618 | send_ipi_message(mask, IPI_TIMER); | |
619 | } | |
620 | ||
621 | void smp_send_stop(void) | |
622 | { | |
623 | cpumask_t mask = cpu_online_map; | |
624 | cpu_clear(smp_processor_id(), mask); | |
625 | send_ipi_message(mask, IPI_CPU_STOP); | |
626 | } | |
627 | ||
628 | /* | |
629 | * not supported here | |
630 | */ | |
631 | int __init setup_profiling_timer(unsigned int multiplier) | |
632 | { | |
633 | return -EINVAL; | |
634 | } | |
4b0ef3b1 RK |
635 | |
636 | static int | |
637 | on_each_cpu_mask(void (*func)(void *), void *info, int retry, int wait, | |
638 | cpumask_t mask) | |
639 | { | |
640 | int ret = 0; | |
641 | ||
642 | preempt_disable(); | |
643 | ||
644 | ret = smp_call_function_on_cpu(func, info, retry, wait, mask); | |
645 | if (cpu_isset(smp_processor_id(), mask)) | |
646 | func(info); | |
647 | ||
648 | preempt_enable(); | |
649 | ||
650 | return ret; | |
651 | } | |
652 | ||
653 | /**********************************************************************/ | |
654 | ||
655 | /* | |
656 | * TLB operations | |
657 | */ | |
658 | struct tlb_args { | |
659 | struct vm_area_struct *ta_vma; | |
660 | unsigned long ta_start; | |
661 | unsigned long ta_end; | |
662 | }; | |
663 | ||
664 | static inline void ipi_flush_tlb_all(void *ignored) | |
665 | { | |
666 | local_flush_tlb_all(); | |
667 | } | |
668 | ||
669 | static inline void ipi_flush_tlb_mm(void *arg) | |
670 | { | |
671 | struct mm_struct *mm = (struct mm_struct *)arg; | |
672 | ||
673 | local_flush_tlb_mm(mm); | |
674 | } | |
675 | ||
676 | static inline void ipi_flush_tlb_page(void *arg) | |
677 | { | |
678 | struct tlb_args *ta = (struct tlb_args *)arg; | |
679 | ||
680 | local_flush_tlb_page(ta->ta_vma, ta->ta_start); | |
681 | } | |
682 | ||
683 | static inline void ipi_flush_tlb_kernel_page(void *arg) | |
684 | { | |
685 | struct tlb_args *ta = (struct tlb_args *)arg; | |
686 | ||
687 | local_flush_tlb_kernel_page(ta->ta_start); | |
688 | } | |
689 | ||
690 | static inline void ipi_flush_tlb_range(void *arg) | |
691 | { | |
692 | struct tlb_args *ta = (struct tlb_args *)arg; | |
693 | ||
694 | local_flush_tlb_range(ta->ta_vma, ta->ta_start, ta->ta_end); | |
695 | } | |
696 | ||
697 | static inline void ipi_flush_tlb_kernel_range(void *arg) | |
698 | { | |
699 | struct tlb_args *ta = (struct tlb_args *)arg; | |
700 | ||
701 | local_flush_tlb_kernel_range(ta->ta_start, ta->ta_end); | |
702 | } | |
703 | ||
704 | void flush_tlb_all(void) | |
705 | { | |
706 | on_each_cpu(ipi_flush_tlb_all, NULL, 1, 1); | |
707 | } | |
708 | ||
709 | void flush_tlb_mm(struct mm_struct *mm) | |
710 | { | |
711 | cpumask_t mask = mm->cpu_vm_mask; | |
712 | ||
713 | on_each_cpu_mask(ipi_flush_tlb_mm, mm, 1, 1, mask); | |
714 | } | |
715 | ||
716 | void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr) | |
717 | { | |
718 | cpumask_t mask = vma->vm_mm->cpu_vm_mask; | |
719 | struct tlb_args ta; | |
720 | ||
721 | ta.ta_vma = vma; | |
722 | ta.ta_start = uaddr; | |
723 | ||
724 | on_each_cpu_mask(ipi_flush_tlb_page, &ta, 1, 1, mask); | |
725 | } | |
726 | ||
727 | void flush_tlb_kernel_page(unsigned long kaddr) | |
728 | { | |
729 | struct tlb_args ta; | |
730 | ||
731 | ta.ta_start = kaddr; | |
732 | ||
733 | on_each_cpu(ipi_flush_tlb_kernel_page, &ta, 1, 1); | |
734 | } | |
735 | ||
736 | void flush_tlb_range(struct vm_area_struct *vma, | |
737 | unsigned long start, unsigned long end) | |
738 | { | |
739 | cpumask_t mask = vma->vm_mm->cpu_vm_mask; | |
740 | struct tlb_args ta; | |
741 | ||
742 | ta.ta_vma = vma; | |
743 | ta.ta_start = start; | |
744 | ta.ta_end = end; | |
745 | ||
746 | on_each_cpu_mask(ipi_flush_tlb_range, &ta, 1, 1, mask); | |
747 | } | |
748 | ||
749 | void flush_tlb_kernel_range(unsigned long start, unsigned long end) | |
750 | { | |
751 | struct tlb_args ta; | |
752 | ||
753 | ta.ta_start = start; | |
754 | ta.ta_end = end; | |
755 | ||
756 | on_each_cpu(ipi_flush_tlb_kernel_range, &ta, 1, 1); | |
757 | } |