]>
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 | */ | |
1da177e4 LT |
10 | #include <linux/delay.h> |
11 | #include <linux/init.h> | |
12 | #include <linux/spinlock.h> | |
13 | #include <linux/sched.h> | |
14 | #include <linux/interrupt.h> | |
15 | #include <linux/cache.h> | |
16 | #include <linux/profile.h> | |
17 | #include <linux/errno.h> | |
18 | #include <linux/mm.h> | |
19 | #include <linux/cpu.h> | |
20 | #include <linux/smp.h> | |
21 | #include <linux/seq_file.h> | |
22 | ||
23 | #include <asm/atomic.h> | |
24 | #include <asm/cacheflush.h> | |
25 | #include <asm/cpu.h> | |
e65f38ed RK |
26 | #include <asm/mmu_context.h> |
27 | #include <asm/pgtable.h> | |
28 | #include <asm/pgalloc.h> | |
1da177e4 LT |
29 | #include <asm/processor.h> |
30 | #include <asm/tlbflush.h> | |
31 | #include <asm/ptrace.h> | |
32 | ||
33 | /* | |
34 | * bitmask of present and online CPUs. | |
35 | * The present bitmask indicates that the CPU is physically present. | |
36 | * The online bitmask indicates that the CPU is up and running. | |
37 | */ | |
d12734d1 | 38 | cpumask_t cpu_possible_map; |
e16b38f7 | 39 | EXPORT_SYMBOL(cpu_possible_map); |
1da177e4 | 40 | cpumask_t cpu_online_map; |
e16b38f7 | 41 | EXPORT_SYMBOL(cpu_online_map); |
1da177e4 | 42 | |
e65f38ed RK |
43 | /* |
44 | * as from 2.5, kernels no longer have an init_tasks structure | |
45 | * so we need some other way of telling a new secondary core | |
46 | * where to place its SVC stack | |
47 | */ | |
48 | struct secondary_data secondary_data; | |
49 | ||
1da177e4 LT |
50 | /* |
51 | * structures for inter-processor calls | |
52 | * - A collection of single bit ipi messages. | |
53 | */ | |
54 | struct ipi_data { | |
55 | spinlock_t lock; | |
56 | unsigned long ipi_count; | |
57 | unsigned long bits; | |
58 | }; | |
59 | ||
60 | static DEFINE_PER_CPU(struct ipi_data, ipi_data) = { | |
61 | .lock = SPIN_LOCK_UNLOCKED, | |
62 | }; | |
63 | ||
64 | enum ipi_msg_type { | |
65 | IPI_TIMER, | |
66 | IPI_RESCHEDULE, | |
67 | IPI_CALL_FUNC, | |
68 | IPI_CPU_STOP, | |
69 | }; | |
70 | ||
71 | struct smp_call_struct { | |
72 | void (*func)(void *info); | |
73 | void *info; | |
74 | int wait; | |
75 | cpumask_t pending; | |
76 | cpumask_t unfinished; | |
77 | }; | |
78 | ||
79 | static struct smp_call_struct * volatile smp_call_function_data; | |
80 | static DEFINE_SPINLOCK(smp_call_function_lock); | |
81 | ||
bd6f68af | 82 | int __cpuinit __cpu_up(unsigned int cpu) |
1da177e4 | 83 | { |
71f512e8 RK |
84 | struct cpuinfo_arm *ci = &per_cpu(cpu_data, cpu); |
85 | struct task_struct *idle = ci->idle; | |
e65f38ed RK |
86 | pgd_t *pgd; |
87 | pmd_t *pmd; | |
1da177e4 LT |
88 | int ret; |
89 | ||
90 | /* | |
71f512e8 RK |
91 | * Spawn a new process manually, if not already done. |
92 | * Grab a pointer to its task struct so we can mess with it | |
1da177e4 | 93 | */ |
71f512e8 RK |
94 | if (!idle) { |
95 | idle = fork_idle(cpu); | |
96 | if (IS_ERR(idle)) { | |
97 | printk(KERN_ERR "CPU%u: fork() failed\n", cpu); | |
98 | return PTR_ERR(idle); | |
99 | } | |
100 | ci->idle = idle; | |
1da177e4 LT |
101 | } |
102 | ||
e65f38ed RK |
103 | /* |
104 | * Allocate initial page tables to allow the new CPU to | |
105 | * enable the MMU safely. This essentially means a set | |
106 | * of our "standard" page tables, with the addition of | |
107 | * a 1:1 mapping for the physical address of the kernel. | |
108 | */ | |
109 | pgd = pgd_alloc(&init_mm); | |
110 | pmd = pmd_offset(pgd, PHYS_OFFSET); | |
111 | *pmd = __pmd((PHYS_OFFSET & PGDIR_MASK) | | |
112 | PMD_TYPE_SECT | PMD_SECT_AP_WRITE); | |
113 | ||
114 | /* | |
115 | * We need to tell the secondary core where to find | |
116 | * its stack and the page tables. | |
117 | */ | |
32d39a93 | 118 | secondary_data.stack = task_stack_page(idle) + THREAD_START_SP; |
e65f38ed RK |
119 | secondary_data.pgdir = virt_to_phys(pgd); |
120 | wmb(); | |
121 | ||
1da177e4 LT |
122 | /* |
123 | * Now bring the CPU into our world. | |
124 | */ | |
125 | ret = boot_secondary(cpu, idle); | |
e65f38ed RK |
126 | if (ret == 0) { |
127 | unsigned long timeout; | |
128 | ||
129 | /* | |
130 | * CPU was successfully started, wait for it | |
131 | * to come online or time out. | |
132 | */ | |
133 | timeout = jiffies + HZ; | |
134 | while (time_before(jiffies, timeout)) { | |
135 | if (cpu_online(cpu)) | |
136 | break; | |
137 | ||
138 | udelay(10); | |
139 | barrier(); | |
140 | } | |
141 | ||
142 | if (!cpu_online(cpu)) | |
143 | ret = -EIO; | |
144 | } | |
145 | ||
5d43045b | 146 | secondary_data.stack = NULL; |
e65f38ed RK |
147 | secondary_data.pgdir = 0; |
148 | ||
149 | *pmd_offset(pgd, PHYS_OFFSET) = __pmd(0); | |
150 | pgd_free(pgd); | |
151 | ||
1da177e4 | 152 | if (ret) { |
0908db22 RK |
153 | printk(KERN_CRIT "CPU%u: processor failed to boot\n", cpu); |
154 | ||
1da177e4 LT |
155 | /* |
156 | * FIXME: We need to clean up the new idle thread. --rmk | |
157 | */ | |
158 | } | |
159 | ||
160 | return ret; | |
161 | } | |
162 | ||
a054a811 RK |
163 | #ifdef CONFIG_HOTPLUG_CPU |
164 | /* | |
165 | * __cpu_disable runs on the processor to be shutdown. | |
166 | */ | |
167 | int __cpuexit __cpu_disable(void) | |
168 | { | |
169 | unsigned int cpu = smp_processor_id(); | |
170 | struct task_struct *p; | |
171 | int ret; | |
172 | ||
173 | ret = mach_cpu_disable(cpu); | |
174 | if (ret) | |
175 | return ret; | |
176 | ||
177 | /* | |
178 | * Take this CPU offline. Once we clear this, we can't return, | |
179 | * and we must not schedule until we're ready to give up the cpu. | |
180 | */ | |
181 | cpu_clear(cpu, cpu_online_map); | |
182 | ||
183 | /* | |
184 | * OK - migrate IRQs away from this CPU | |
185 | */ | |
186 | migrate_irqs(); | |
187 | ||
37ee16ae RK |
188 | /* |
189 | * Stop the local timer for this CPU. | |
190 | */ | |
191 | local_timer_stop(cpu); | |
192 | ||
a054a811 RK |
193 | /* |
194 | * Flush user cache and TLB mappings, and then remove this CPU | |
195 | * from the vm mask set of all processes. | |
196 | */ | |
197 | flush_cache_all(); | |
198 | local_flush_tlb_all(); | |
199 | ||
200 | read_lock(&tasklist_lock); | |
201 | for_each_process(p) { | |
202 | if (p->mm) | |
203 | cpu_clear(cpu, p->mm->cpu_vm_mask); | |
204 | } | |
205 | read_unlock(&tasklist_lock); | |
206 | ||
207 | return 0; | |
208 | } | |
209 | ||
210 | /* | |
211 | * called on the thread which is asking for a CPU to be shutdown - | |
212 | * waits until shutdown has completed, or it is timed out. | |
213 | */ | |
214 | void __cpuexit __cpu_die(unsigned int cpu) | |
215 | { | |
216 | if (!platform_cpu_kill(cpu)) | |
217 | printk("CPU%u: unable to kill\n", cpu); | |
218 | } | |
219 | ||
220 | /* | |
221 | * Called from the idle thread for the CPU which has been shutdown. | |
222 | * | |
223 | * Note that we disable IRQs here, but do not re-enable them | |
224 | * before returning to the caller. This is also the behaviour | |
225 | * of the other hotplug-cpu capable cores, so presumably coming | |
226 | * out of idle fixes this. | |
227 | */ | |
228 | void __cpuexit cpu_die(void) | |
229 | { | |
230 | unsigned int cpu = smp_processor_id(); | |
231 | ||
232 | local_irq_disable(); | |
233 | idle_task_exit(); | |
234 | ||
235 | /* | |
236 | * actual CPU shutdown procedure is at least platform (if not | |
237 | * CPU) specific | |
238 | */ | |
239 | platform_cpu_die(cpu); | |
240 | ||
241 | /* | |
242 | * Do not return to the idle loop - jump back to the secondary | |
243 | * cpu initialisation. There's some initialisation which needs | |
244 | * to be repeated to undo the effects of taking the CPU offline. | |
245 | */ | |
246 | __asm__("mov sp, %0\n" | |
247 | " b secondary_start_kernel" | |
248 | : | |
32d39a93 | 249 | : "r" (task_stack_page(current) + THREAD_SIZE - 8)); |
a054a811 RK |
250 | } |
251 | #endif /* CONFIG_HOTPLUG_CPU */ | |
252 | ||
e65f38ed RK |
253 | /* |
254 | * This is the secondary CPU boot entry. We're using this CPUs | |
255 | * idle thread stack, but a set of temporary page tables. | |
256 | */ | |
bd6f68af | 257 | asmlinkage void __cpuinit secondary_start_kernel(void) |
e65f38ed RK |
258 | { |
259 | struct mm_struct *mm = &init_mm; | |
da2660d2 | 260 | unsigned int cpu = smp_processor_id(); |
e65f38ed RK |
261 | |
262 | printk("CPU%u: Booted secondary processor\n", cpu); | |
263 | ||
264 | /* | |
265 | * All kernel threads share the same mm context; grab a | |
266 | * reference and switch to it. | |
267 | */ | |
268 | atomic_inc(&mm->mm_users); | |
269 | atomic_inc(&mm->mm_count); | |
270 | current->active_mm = mm; | |
271 | cpu_set(cpu, mm->cpu_vm_mask); | |
272 | cpu_switch_mm(mm->pgd, mm); | |
273 | enter_lazy_tlb(mm, current); | |
505d7b19 | 274 | local_flush_tlb_all(); |
e65f38ed RK |
275 | |
276 | cpu_init(); | |
5bfb5d69 | 277 | preempt_disable(); |
e65f38ed RK |
278 | |
279 | /* | |
280 | * Give the platform a chance to do its own initialisation. | |
281 | */ | |
282 | platform_secondary_init(cpu); | |
283 | ||
284 | /* | |
285 | * Enable local interrupts. | |
286 | */ | |
287 | local_irq_enable(); | |
288 | local_fiq_enable(); | |
289 | ||
290 | calibrate_delay(); | |
291 | ||
292 | smp_store_cpu_info(cpu); | |
293 | ||
294 | /* | |
295 | * OK, now it's safe to let the boot CPU continue | |
296 | */ | |
297 | cpu_set(cpu, cpu_online_map); | |
298 | ||
37ee16ae RK |
299 | /* |
300 | * Setup local timer for this CPU. | |
301 | */ | |
302 | local_timer_setup(cpu); | |
303 | ||
e65f38ed RK |
304 | /* |
305 | * OK, it's off to the idle thread for us | |
306 | */ | |
307 | cpu_idle(); | |
308 | } | |
309 | ||
1da177e4 LT |
310 | /* |
311 | * Called by both boot and secondaries to move global data into | |
312 | * per-processor storage. | |
313 | */ | |
bd6f68af | 314 | void __cpuinit smp_store_cpu_info(unsigned int cpuid) |
1da177e4 LT |
315 | { |
316 | struct cpuinfo_arm *cpu_info = &per_cpu(cpu_data, cpuid); | |
317 | ||
318 | cpu_info->loops_per_jiffy = loops_per_jiffy; | |
319 | } | |
320 | ||
321 | void __init smp_cpus_done(unsigned int max_cpus) | |
322 | { | |
323 | int cpu; | |
324 | unsigned long bogosum = 0; | |
325 | ||
326 | for_each_online_cpu(cpu) | |
327 | bogosum += per_cpu(cpu_data, cpu).loops_per_jiffy; | |
328 | ||
329 | printk(KERN_INFO "SMP: Total of %d processors activated " | |
330 | "(%lu.%02lu BogoMIPS).\n", | |
331 | num_online_cpus(), | |
332 | bogosum / (500000/HZ), | |
333 | (bogosum / (5000/HZ)) % 100); | |
334 | } | |
335 | ||
336 | void __init smp_prepare_boot_cpu(void) | |
337 | { | |
338 | unsigned int cpu = smp_processor_id(); | |
339 | ||
71f512e8 | 340 | per_cpu(cpu_data, cpu).idle = current; |
1da177e4 LT |
341 | } |
342 | ||
343 | static void send_ipi_message(cpumask_t callmap, enum ipi_msg_type msg) | |
344 | { | |
345 | unsigned long flags; | |
346 | unsigned int cpu; | |
347 | ||
348 | local_irq_save(flags); | |
349 | ||
350 | for_each_cpu_mask(cpu, callmap) { | |
351 | struct ipi_data *ipi = &per_cpu(ipi_data, cpu); | |
352 | ||
353 | spin_lock(&ipi->lock); | |
354 | ipi->bits |= 1 << msg; | |
355 | spin_unlock(&ipi->lock); | |
356 | } | |
357 | ||
358 | /* | |
359 | * Call the platform specific cross-CPU call function. | |
360 | */ | |
361 | smp_cross_call(callmap); | |
362 | ||
363 | local_irq_restore(flags); | |
364 | } | |
365 | ||
366 | /* | |
367 | * You must not call this function with disabled interrupts, from a | |
368 | * hardware interrupt handler, nor from a bottom half handler. | |
369 | */ | |
5d43045b RK |
370 | static int smp_call_function_on_cpu(void (*func)(void *info), void *info, |
371 | int retry, int wait, cpumask_t callmap) | |
1da177e4 LT |
372 | { |
373 | struct smp_call_struct data; | |
374 | unsigned long timeout; | |
375 | int ret = 0; | |
376 | ||
377 | data.func = func; | |
378 | data.info = info; | |
379 | data.wait = wait; | |
380 | ||
381 | cpu_clear(smp_processor_id(), callmap); | |
382 | if (cpus_empty(callmap)) | |
383 | goto out; | |
384 | ||
385 | data.pending = callmap; | |
386 | if (wait) | |
387 | data.unfinished = callmap; | |
388 | ||
389 | /* | |
390 | * try to get the mutex on smp_call_function_data | |
391 | */ | |
392 | spin_lock(&smp_call_function_lock); | |
393 | smp_call_function_data = &data; | |
394 | ||
395 | send_ipi_message(callmap, IPI_CALL_FUNC); | |
396 | ||
397 | timeout = jiffies + HZ; | |
398 | while (!cpus_empty(data.pending) && time_before(jiffies, timeout)) | |
399 | barrier(); | |
400 | ||
401 | /* | |
402 | * did we time out? | |
403 | */ | |
404 | if (!cpus_empty(data.pending)) { | |
405 | /* | |
406 | * this may be causing our panic - report it | |
407 | */ | |
408 | printk(KERN_CRIT | |
409 | "CPU%u: smp_call_function timeout for %p(%p)\n" | |
410 | " callmap %lx pending %lx, %swait\n", | |
273c2cdb RK |
411 | smp_processor_id(), func, info, *cpus_addr(callmap), |
412 | *cpus_addr(data.pending), wait ? "" : "no "); | |
1da177e4 LT |
413 | |
414 | /* | |
415 | * TRACE | |
416 | */ | |
417 | timeout = jiffies + (5 * HZ); | |
418 | while (!cpus_empty(data.pending) && time_before(jiffies, timeout)) | |
419 | barrier(); | |
420 | ||
421 | if (cpus_empty(data.pending)) | |
422 | printk(KERN_CRIT " RESOLVED\n"); | |
423 | else | |
424 | printk(KERN_CRIT " STILL STUCK\n"); | |
425 | } | |
426 | ||
427 | /* | |
428 | * whatever happened, we're done with the data, so release it | |
429 | */ | |
430 | smp_call_function_data = NULL; | |
431 | spin_unlock(&smp_call_function_lock); | |
432 | ||
433 | if (!cpus_empty(data.pending)) { | |
434 | ret = -ETIMEDOUT; | |
435 | goto out; | |
436 | } | |
437 | ||
438 | if (wait) | |
439 | while (!cpus_empty(data.unfinished)) | |
440 | barrier(); | |
441 | out: | |
442 | ||
443 | return 0; | |
444 | } | |
445 | ||
446 | int smp_call_function(void (*func)(void *info), void *info, int retry, | |
447 | int wait) | |
448 | { | |
449 | return smp_call_function_on_cpu(func, info, retry, wait, | |
450 | cpu_online_map); | |
451 | } | |
452 | ||
453 | void show_ipi_list(struct seq_file *p) | |
454 | { | |
455 | unsigned int cpu; | |
456 | ||
457 | seq_puts(p, "IPI:"); | |
458 | ||
e11b2236 | 459 | for_each_present_cpu(cpu) |
1da177e4 LT |
460 | seq_printf(p, " %10lu", per_cpu(ipi_data, cpu).ipi_count); |
461 | ||
462 | seq_putc(p, '\n'); | |
463 | } | |
464 | ||
37ee16ae RK |
465 | void show_local_irqs(struct seq_file *p) |
466 | { | |
467 | unsigned int cpu; | |
468 | ||
469 | seq_printf(p, "LOC: "); | |
470 | ||
471 | for_each_present_cpu(cpu) | |
472 | seq_printf(p, "%10u ", irq_stat[cpu].local_timer_irqs); | |
473 | ||
474 | seq_putc(p, '\n'); | |
475 | } | |
476 | ||
1da177e4 LT |
477 | static void ipi_timer(struct pt_regs *regs) |
478 | { | |
479 | int user = user_mode(regs); | |
480 | ||
481 | irq_enter(); | |
482 | profile_tick(CPU_PROFILING, regs); | |
483 | update_process_times(user); | |
484 | irq_exit(); | |
485 | } | |
486 | ||
37ee16ae RK |
487 | #ifdef CONFIG_LOCAL_TIMERS |
488 | asmlinkage void do_local_timer(struct pt_regs *regs) | |
489 | { | |
490 | int cpu = smp_processor_id(); | |
491 | ||
492 | if (local_timer_ack()) { | |
493 | irq_stat[cpu].local_timer_irqs++; | |
494 | ipi_timer(regs); | |
495 | } | |
496 | } | |
497 | #endif | |
498 | ||
1da177e4 LT |
499 | /* |
500 | * ipi_call_function - handle IPI from smp_call_function() | |
501 | * | |
502 | * Note that we copy data out of the cross-call structure and then | |
503 | * let the caller know that we're here and have done with their data | |
504 | */ | |
505 | static void ipi_call_function(unsigned int cpu) | |
506 | { | |
507 | struct smp_call_struct *data = smp_call_function_data; | |
508 | void (*func)(void *info) = data->func; | |
509 | void *info = data->info; | |
510 | int wait = data->wait; | |
511 | ||
512 | cpu_clear(cpu, data->pending); | |
513 | ||
514 | func(info); | |
515 | ||
516 | if (wait) | |
517 | cpu_clear(cpu, data->unfinished); | |
518 | } | |
519 | ||
520 | static DEFINE_SPINLOCK(stop_lock); | |
521 | ||
522 | /* | |
523 | * ipi_cpu_stop - handle IPI from smp_send_stop() | |
524 | */ | |
525 | static void ipi_cpu_stop(unsigned int cpu) | |
526 | { | |
527 | spin_lock(&stop_lock); | |
528 | printk(KERN_CRIT "CPU%u: stopping\n", cpu); | |
529 | dump_stack(); | |
530 | spin_unlock(&stop_lock); | |
531 | ||
532 | cpu_clear(cpu, cpu_online_map); | |
533 | ||
534 | local_fiq_disable(); | |
535 | local_irq_disable(); | |
536 | ||
537 | while (1) | |
538 | cpu_relax(); | |
539 | } | |
540 | ||
541 | /* | |
542 | * Main handler for inter-processor interrupts | |
543 | * | |
544 | * For ARM, the ipimask now only identifies a single | |
545 | * category of IPI (Bit 1 IPIs have been replaced by a | |
546 | * different mechanism): | |
547 | * | |
548 | * Bit 0 - Inter-processor function call | |
549 | */ | |
2c250134 | 550 | asmlinkage void do_IPI(struct pt_regs *regs) |
1da177e4 LT |
551 | { |
552 | unsigned int cpu = smp_processor_id(); | |
553 | struct ipi_data *ipi = &per_cpu(ipi_data, cpu); | |
554 | ||
555 | ipi->ipi_count++; | |
556 | ||
557 | for (;;) { | |
558 | unsigned long msgs; | |
559 | ||
560 | spin_lock(&ipi->lock); | |
561 | msgs = ipi->bits; | |
562 | ipi->bits = 0; | |
563 | spin_unlock(&ipi->lock); | |
564 | ||
565 | if (!msgs) | |
566 | break; | |
567 | ||
568 | do { | |
569 | unsigned nextmsg; | |
570 | ||
571 | nextmsg = msgs & -msgs; | |
572 | msgs &= ~nextmsg; | |
573 | nextmsg = ffz(~nextmsg); | |
574 | ||
575 | switch (nextmsg) { | |
576 | case IPI_TIMER: | |
577 | ipi_timer(regs); | |
578 | break; | |
579 | ||
580 | case IPI_RESCHEDULE: | |
581 | /* | |
582 | * nothing more to do - eveything is | |
583 | * done on the interrupt return path | |
584 | */ | |
585 | break; | |
586 | ||
587 | case IPI_CALL_FUNC: | |
588 | ipi_call_function(cpu); | |
589 | break; | |
590 | ||
591 | case IPI_CPU_STOP: | |
592 | ipi_cpu_stop(cpu); | |
593 | break; | |
594 | ||
595 | default: | |
596 | printk(KERN_CRIT "CPU%u: Unknown IPI message 0x%x\n", | |
597 | cpu, nextmsg); | |
598 | break; | |
599 | } | |
600 | } while (msgs); | |
601 | } | |
602 | } | |
603 | ||
604 | void smp_send_reschedule(int cpu) | |
605 | { | |
606 | send_ipi_message(cpumask_of_cpu(cpu), IPI_RESCHEDULE); | |
607 | } | |
608 | ||
609 | void smp_send_timer(void) | |
610 | { | |
611 | cpumask_t mask = cpu_online_map; | |
612 | cpu_clear(smp_processor_id(), mask); | |
613 | send_ipi_message(mask, IPI_TIMER); | |
614 | } | |
615 | ||
616 | void smp_send_stop(void) | |
617 | { | |
618 | cpumask_t mask = cpu_online_map; | |
619 | cpu_clear(smp_processor_id(), mask); | |
620 | send_ipi_message(mask, IPI_CPU_STOP); | |
621 | } | |
622 | ||
623 | /* | |
624 | * not supported here | |
625 | */ | |
626 | int __init setup_profiling_timer(unsigned int multiplier) | |
627 | { | |
628 | return -EINVAL; | |
629 | } | |
4b0ef3b1 RK |
630 | |
631 | static int | |
632 | on_each_cpu_mask(void (*func)(void *), void *info, int retry, int wait, | |
633 | cpumask_t mask) | |
634 | { | |
635 | int ret = 0; | |
636 | ||
637 | preempt_disable(); | |
638 | ||
639 | ret = smp_call_function_on_cpu(func, info, retry, wait, mask); | |
640 | if (cpu_isset(smp_processor_id(), mask)) | |
641 | func(info); | |
642 | ||
643 | preempt_enable(); | |
644 | ||
645 | return ret; | |
646 | } | |
647 | ||
648 | /**********************************************************************/ | |
649 | ||
650 | /* | |
651 | * TLB operations | |
652 | */ | |
653 | struct tlb_args { | |
654 | struct vm_area_struct *ta_vma; | |
655 | unsigned long ta_start; | |
656 | unsigned long ta_end; | |
657 | }; | |
658 | ||
659 | static inline void ipi_flush_tlb_all(void *ignored) | |
660 | { | |
661 | local_flush_tlb_all(); | |
662 | } | |
663 | ||
664 | static inline void ipi_flush_tlb_mm(void *arg) | |
665 | { | |
666 | struct mm_struct *mm = (struct mm_struct *)arg; | |
667 | ||
668 | local_flush_tlb_mm(mm); | |
669 | } | |
670 | ||
671 | static inline void ipi_flush_tlb_page(void *arg) | |
672 | { | |
673 | struct tlb_args *ta = (struct tlb_args *)arg; | |
674 | ||
675 | local_flush_tlb_page(ta->ta_vma, ta->ta_start); | |
676 | } | |
677 | ||
678 | static inline void ipi_flush_tlb_kernel_page(void *arg) | |
679 | { | |
680 | struct tlb_args *ta = (struct tlb_args *)arg; | |
681 | ||
682 | local_flush_tlb_kernel_page(ta->ta_start); | |
683 | } | |
684 | ||
685 | static inline void ipi_flush_tlb_range(void *arg) | |
686 | { | |
687 | struct tlb_args *ta = (struct tlb_args *)arg; | |
688 | ||
689 | local_flush_tlb_range(ta->ta_vma, ta->ta_start, ta->ta_end); | |
690 | } | |
691 | ||
692 | static inline void ipi_flush_tlb_kernel_range(void *arg) | |
693 | { | |
694 | struct tlb_args *ta = (struct tlb_args *)arg; | |
695 | ||
696 | local_flush_tlb_kernel_range(ta->ta_start, ta->ta_end); | |
697 | } | |
698 | ||
699 | void flush_tlb_all(void) | |
700 | { | |
701 | on_each_cpu(ipi_flush_tlb_all, NULL, 1, 1); | |
702 | } | |
703 | ||
704 | void flush_tlb_mm(struct mm_struct *mm) | |
705 | { | |
706 | cpumask_t mask = mm->cpu_vm_mask; | |
707 | ||
708 | on_each_cpu_mask(ipi_flush_tlb_mm, mm, 1, 1, mask); | |
709 | } | |
710 | ||
711 | void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr) | |
712 | { | |
713 | cpumask_t mask = vma->vm_mm->cpu_vm_mask; | |
714 | struct tlb_args ta; | |
715 | ||
716 | ta.ta_vma = vma; | |
717 | ta.ta_start = uaddr; | |
718 | ||
719 | on_each_cpu_mask(ipi_flush_tlb_page, &ta, 1, 1, mask); | |
720 | } | |
721 | ||
722 | void flush_tlb_kernel_page(unsigned long kaddr) | |
723 | { | |
724 | struct tlb_args ta; | |
725 | ||
726 | ta.ta_start = kaddr; | |
727 | ||
728 | on_each_cpu(ipi_flush_tlb_kernel_page, &ta, 1, 1); | |
729 | } | |
730 | ||
731 | void flush_tlb_range(struct vm_area_struct *vma, | |
732 | unsigned long start, unsigned long end) | |
733 | { | |
734 | cpumask_t mask = vma->vm_mm->cpu_vm_mask; | |
735 | struct tlb_args ta; | |
736 | ||
737 | ta.ta_vma = vma; | |
738 | ta.ta_start = start; | |
739 | ta.ta_end = end; | |
740 | ||
741 | on_each_cpu_mask(ipi_flush_tlb_range, &ta, 1, 1, mask); | |
742 | } | |
743 | ||
744 | void flush_tlb_kernel_range(unsigned long start, unsigned long end) | |
745 | { | |
746 | struct tlb_args ta; | |
747 | ||
748 | ta.ta_start = start; | |
749 | ta.ta_end = end; | |
750 | ||
751 | on_each_cpu(ipi_flush_tlb_kernel_range, &ta, 1, 1); | |
752 | } |