1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 /*
27 * This module contains the guts of checkpoint-resume mechanism.
28 * All code in this module is platform independent.
29 */
30
31 #include <sys/types.h>
32 #include <sys/errno.h>
33 #include <sys/callb.h>
34 #include <sys/processor.h>
35 #include <sys/machsystm.h>
36 #include <sys/clock.h>
37 #include <sys/vfs.h>
38 #include <sys/kmem.h>
39 #include <nfs/lm.h>
40 #include <sys/systm.h>
41 #include <sys/cpr.h>
42 #include <sys/bootconf.h>
43 #include <sys/cyclic.h>
44 #include <sys/filio.h>
45 #include <sys/fs/ufs_filio.h>
46 #include <sys/epm.h>
47 #include <sys/modctl.h>
48 #include <sys/reboot.h>
49 #include <sys/kdi.h>
50 #include <sys/promif.h>
51 #include <sys/srn.h>
52 #include <sys/cpr_impl.h>
53
54 #define PPM(dip) ((dev_info_t *)DEVI(dip)->devi_pm_ppm)
55
56 extern struct cpr_terminator cpr_term;
57
58 extern int cpr_alloc_statefile(int);
59 extern void cpr_start_kernel_threads(void);
60 extern void cpr_abbreviate_devpath(char *, char *);
61 extern void cpr_convert_promtime(cpr_time_t *);
62 extern void cpr_send_notice(void);
63 extern void cpr_set_bitmap_size(void);
64 extern void cpr_stat_init();
65 extern void cpr_statef_close(void);
66 extern void flush_windows(void);
67 extern void (*srn_signal)(int, int);
68 extern void init_cpu_syscall(struct cpu *);
69 extern void i_cpr_pre_resume_cpus();
70 extern void i_cpr_post_resume_cpus();
71 extern int cpr_is_ufs(struct vfs *);
72
73 extern int pm_powering_down;
74 extern kmutex_t srn_clone_lock;
75 extern int srn_inuse;
76
77 static int cpr_suspend(int);
78 static int cpr_resume(int);
79 static void cpr_suspend_init(int);
80 #if defined(__x86)
81 static int cpr_suspend_cpus(void);
82 static void cpr_resume_cpus(void);
83 #endif
84 static int cpr_all_online(void);
85 static void cpr_restore_offline(void);
86
87 cpr_time_t wholecycle_tv;
88 int cpr_suspend_succeeded;
89 pfn_t curthreadpfn;
90 int curthreadremapped;
91
92 extern cpuset_t cpu_ready_set;
93 extern void *(*cpu_pause_func)(void *);
94
95 extern processorid_t i_cpr_bootcpuid(void);
96 extern cpu_t *i_cpr_bootcpu(void);
97 extern void tsc_adjust_delta(hrtime_t tdelta);
98 extern void tsc_resume(void);
99 extern int tsc_resume_in_cyclic;
100
101 /*
102 * Set this variable to 1, to have device drivers resume in an
103 * uniprocessor environment. This is to allow drivers that assume
104 * that they resume on a UP machine to continue to work. Should be
105 * deprecated once the broken drivers are fixed
106 */
107 int cpr_resume_uniproc = 0;
108
109 /*
110 * save or restore abort_enable; this prevents a drop
111 * to kadb or prom during cpr_resume_devices() when
112 * there is no kbd present; see abort_sequence_enter()
113 */
114 static void
115 cpr_sae(int stash)
116 {
117 static int saved_ae = -1;
118
119 if (stash) {
120 saved_ae = abort_enable;
121 abort_enable = 0;
122 } else if (saved_ae != -1) {
123 abort_enable = saved_ae;
124 saved_ae = -1;
125 }
126 }
127
128
129 /*
130 * The main switching point for cpr, this routine starts the ckpt
131 * and state file saving routines; on resume the control is
132 * returned back to here and it then calls the resume routine.
133 */
134 int
135 cpr_main(int sleeptype)
136 {
137 int rc, rc2;
138 label_t saveq;
139 klwp_t *tlwp = ttolwp(curthread);
140
141 if (sleeptype == CPR_TODISK) {
142 if ((rc = cpr_default_setup(1)) != 0)
143 return (rc);
144 ASSERT(tlwp);
145 saveq = tlwp->lwp_qsav;
146 }
147
148 if (sleeptype == CPR_TORAM) {
149 rc = cpr_suspend(sleeptype);
150 PMD(PMD_SX, ("cpr_suspend rets %x\n", rc))
151 if (rc == 0) {
152 int i_cpr_power_down(int sleeptype);
153
154 /*
155 * From this point on, we should be at a high
156 * spl, interrupts disabled, and all but one
157 * cpu's paused (effectively UP/single threaded).
158 * So this is were we want to put ASSERTS()
159 * to let us know otherwise.
160 */
161 ASSERT(cpus_paused());
162
163 /*
164 * Now do the work of actually putting this
165 * machine to sleep!
166 */
167 rc = i_cpr_power_down(sleeptype);
168 if (rc == 0) {
169 PMD(PMD_SX, ("back from successful suspend\n"))
170 }
171 /*
172 * We do care about the return value from cpr_resume
173 * at this point, as it will tell us if one of the
174 * resume functions failed (cpr_resume_devices())
175 * However, for this to return and _not_ panic, means
176 * that we must be in one of the test functions. So
177 * check for that and return an appropriate message.
178 */
179 rc2 = cpr_resume(sleeptype);
180 if (rc2 != 0) {
181 ASSERT(cpr_test_point > 0);
182 cmn_err(CE_NOTE,
183 "cpr_resume returned non-zero: %d\n", rc2);
184 PMD(PMD_SX, ("cpr_resume rets %x\n", rc2))
185 }
186 ASSERT(!cpus_paused());
187 } else {
188 PMD(PMD_SX, ("failed suspend, resuming\n"))
189 rc = cpr_resume(sleeptype);
190 }
191 return (rc);
192 }
193 /*
194 * Remember where we are for resume after reboot
195 */
196 if (!setjmp(&tlwp->lwp_qsav)) {
197 /*
198 * try to checkpoint the system, if failed return back
199 * to userland, otherwise power off.
200 */
201 rc = cpr_suspend(sleeptype);
202 if (rc || cpr_reusable_mode) {
203 /*
204 * We don't really want to go down, or
205 * something went wrong in suspend, do what we can
206 * to put the system back to an operable state then
207 * return back to userland.
208 */
209 PMD(PMD_SX, ("failed suspend, resuming\n"))
210 (void) cpr_resume(sleeptype);
211 PMD(PMD_SX, ("back from failed suspend resume\n"))
212 }
213 } else {
214 /*
215 * This is the resumed side of longjmp, restore the previous
216 * longjmp pointer if there is one so this will be transparent
217 * to the world.
218 * This path is only for CPR_TODISK, where we reboot
219 */
220 ASSERT(sleeptype == CPR_TODISK);
221 tlwp->lwp_qsav = saveq;
222 CPR->c_flags &= ~C_SUSPENDING;
223 CPR->c_flags |= C_RESUMING;
224
225 /*
226 * resume the system back to the original state
227 */
228 rc = cpr_resume(sleeptype);
229 PMD(PMD_SX, ("back from successful suspend; resume rets %x\n",
230 rc))
231 }
232
233 (void) cpr_default_setup(0);
234
235 return (rc);
236 }
237
238
239 #if defined(__sparc)
240
241 /*
242 * check/disable or re-enable UFS logging
243 */
244 static void
245 cpr_log_status(int enable, int *svstat, vnode_t *vp)
246 {
247 int cmd, status, error;
248 char *str, *able;
249 fiolog_t fl;
250 refstr_t *mntpt;
251
252 str = "cpr_log_status";
253 bzero(&fl, sizeof (fl));
254 fl.error = FIOLOG_ENONE;
255
256 /*
257 * when disabling, first get and save logging status (0 or 1)
258 */
259 if (enable == 0) {
260 if (error = VOP_IOCTL(vp, _FIOISLOG,
261 (uintptr_t)&status, FKIOCTL, CRED(), NULL, NULL)) {
262 mntpt = vfs_getmntpoint(vp->v_vfsp);
263 prom_printf("%s: \"%s\", cant get logging "
264 "status, error %d\n", str, refstr_value(mntpt),
265 error);
266 refstr_rele(mntpt);
267 return;
268 }
269 *svstat = status;
270 if (cpr_debug & CPR_DEBUG5) {
271 mntpt = vfs_getmntpoint(vp->v_vfsp);
272 errp("%s: \"%s\", logging status = %d\n",
273 str, refstr_value(mntpt), status);
274 refstr_rele(mntpt);
275 };
276
277 able = "disable";
278 cmd = _FIOLOGDISABLE;
279 } else {
280 able = "enable";
281 cmd = _FIOLOGENABLE;
282 }
283
284 /*
285 * disable or re-enable logging when the saved status is 1
286 */
287 if (*svstat == 1) {
288 error = VOP_IOCTL(vp, cmd, (uintptr_t)&fl,
289 FKIOCTL, CRED(), NULL, NULL);
290 if (error) {
291 mntpt = vfs_getmntpoint(vp->v_vfsp);
292 prom_printf("%s: \"%s\", cant %s logging, error %d\n",
293 str, refstr_value(mntpt), able, error);
294 refstr_rele(mntpt);
295 } else {
296 if (cpr_debug & CPR_DEBUG5) {
297 mntpt = vfs_getmntpoint(vp->v_vfsp);
298 errp("%s: \"%s\", logging is now %sd\n",
299 str, refstr_value(mntpt), able);
300 refstr_rele(mntpt);
301 };
302 }
303 }
304
305 /*
306 * when enabling logging, reset the saved status
307 * to unknown for next time
308 */
309 if (enable)
310 *svstat = -1;
311 }
312
313 /*
314 * enable/disable UFS logging on filesystems containing cpr_default_path
315 * and cpr statefile. since the statefile can be on any fs, that fs
316 * needs to be handled separately. this routine and cprboot expect that
317 * CPR_CONFIG and CPR_DEFAULT both reside on the same fs, rootfs. cprboot
318 * is loaded from the device with rootfs and uses the same device to open
319 * both CPR_CONFIG and CPR_DEFAULT (see common/support.c). moving either
320 * file outside of rootfs would cause errors during cprboot, plus cpr and
321 * fsck problems with the new fs if logging were enabled.
322 */
323
324 static int
325 cpr_ufs_logging(int enable)
326 {
327 static int def_status = -1, sf_status = -1;
328 struct vfs *vfsp;
329 char *fname;
330 vnode_t *vp;
331 int error;
332
333 if (cpr_reusable_mode)
334 return (0);
335
336 if (error = cpr_open_deffile(FREAD, &vp))
337 return (error);
338 vfsp = vp->v_vfsp;
339 if (!cpr_is_ufs(vfsp)) {
340 (void) VOP_CLOSE(vp, FREAD, 1, (offset_t)0, CRED(), NULL);
341 VN_RELE(vp);
342 return (0);
343 }
344
345 cpr_log_status(enable, &def_status, vp);
346 (void) VOP_CLOSE(vp, FREAD, 1, (offset_t)0, CRED(), NULL);
347 VN_RELE(vp);
348
349 fname = cpr_build_statefile_path();
350 if (fname == NULL)
351 return (ENOENT);
352 if (error = vn_open(fname, UIO_SYSSPACE, FCREAT|FWRITE,
353 0600, &vp, CRCREAT, 0)) {
354 prom_printf("cpr_ufs_logging: cant open/create \"%s\", "
355 "error %d\n", fname, error);
356 return (error);
357 }
358
359 /*
360 * check logging status for the statefile if it resides
361 * on a different fs and the type is a regular file
362 */
363 if (vp->v_vfsp != vfsp && vp->v_type == VREG)
364 cpr_log_status(enable, &sf_status, vp);
365 (void) VOP_CLOSE(vp, FWRITE, 1, (offset_t)0, CRED(), NULL);
366 VN_RELE(vp);
367
368 return (0);
369 }
370 #endif
371
372
373 /*
374 * Check if klmmod is loaded and call a lock manager service; if klmmod
375 * is not loaded, the services aren't needed and a call would trigger a
376 * modload, which would block since another thread would never run.
377 */
378 static void
379 cpr_lock_mgr(void (*service)(void))
380 {
381 if (mod_find_by_filename(NULL, "misc/klmmod") != NULL)
382 (*service)();
383 }
384
385 int
386 cpr_suspend_cpus(void)
387 {
388 int ret = 0;
389 extern void *i_cpr_save_context(void *arg);
390
391 mutex_enter(&cpu_lock);
392
393 /*
394 * the machine could not have booted without a bootcpu
395 */
396 ASSERT(i_cpr_bootcpu() != NULL);
397
398 /*
399 * bring all the offline cpus online
400 */
401 if ((ret = cpr_all_online())) {
402 mutex_exit(&cpu_lock);
403 return (ret);
404 }
405
406 /*
407 * Set the affinity to be the boot processor
408 * This is cleared in either cpr_resume_cpus() or cpr_unpause_cpus()
409 */
410 affinity_set(i_cpr_bootcpuid());
411
412 ASSERT(CPU->cpu_id == 0);
413
414 PMD(PMD_SX, ("curthread running on bootcpu\n"))
415
416 /*
417 * pause all other running CPUs and save the CPU state at the sametime
418 */
419 cpu_pause_func = i_cpr_save_context;
420 pause_cpus(NULL);
421
422 mutex_exit(&cpu_lock);
423
424 return (0);
425 }
426
427 /*
428 * Take the system down to a checkpointable state and write
429 * the state file, the following are sequentially executed:
430 *
431 * - Request all user threads to stop themselves
432 * - push out and invalidate user pages
433 * - bring statefile inode incore to prevent a miss later
434 * - request all daemons to stop
435 * - check and make sure all threads are stopped
436 * - sync the file system
437 * - suspend all devices
438 * - block intrpts
439 * - dump system state and memory to state file
440 * - SPARC code will not be called with CPR_TORAM, caller filters
441 */
442 static int
443 cpr_suspend(int sleeptype)
444 {
445 #if defined(__sparc)
446 int sf_realloc, nverr;
447 #endif
448 int rc = 0;
449 int skt_rc = 0;
450
451 PMD(PMD_SX, ("cpr_suspend %x\n", sleeptype))
452 cpr_set_substate(C_ST_SUSPEND_BEGIN);
453
454 cpr_suspend_init(sleeptype);
455
456 cpr_save_time();
457
458 cpr_tod_get(&wholecycle_tv);
459 CPR_STAT_EVENT_START("Suspend Total");
460
461 i_cpr_alloc_cpus();
462
463 #if defined(__sparc)
464 ASSERT(sleeptype == CPR_TODISK);
465 if (!cpr_reusable_mode) {
466 /*
467 * We need to validate default file before fs
468 * functionality is disabled.
469 */
470 if (rc = cpr_validate_definfo(0))
471 return (rc);
472 }
473 i_cpr_save_machdep_info();
474 #endif
475
476 PMD(PMD_SX, ("cpr_suspend: stop scans\n"))
477 /* Stop PM scans ASAP */
478 (void) callb_execute_class(CB_CL_CPR_PM, CB_CODE_CPR_CHKPT);
479
480 pm_dispatch_to_dep_thread(PM_DEP_WK_CPR_SUSPEND,
481 NULL, NULL, PM_DEP_WAIT, NULL, 0);
482
483 #if defined(__sparc)
484 ASSERT(sleeptype == CPR_TODISK);
485 cpr_set_substate(C_ST_MP_OFFLINE);
486 if (rc = cpr_mp_offline())
487 return (rc);
488 #endif
489 /*
490 * Ask Xorg to suspend the frame buffer, and wait for it to happen
491 */
492 mutex_enter(&srn_clone_lock);
493 if (srn_signal) {
494 PMD(PMD_SX, ("cpr_suspend: (*srn_signal)(..., "
495 "SRN_SUSPEND_REQ)\n"))
496 srn_inuse = 1; /* because *(srn_signal) cv_waits */
497 (*srn_signal)(SRN_TYPE_APM, SRN_SUSPEND_REQ);
498 srn_inuse = 0;
499 } else {
500 PMD(PMD_SX, ("cpr_suspend: srn_signal NULL\n"))
501 }
502 mutex_exit(&srn_clone_lock);
503
504 /*
505 * Ask the user threads to stop by themselves, but
506 * if they don't or can't after 3 retries, we give up on CPR.
507 * The 3 retry is not a random number because 2 is possible if
508 * a thread has been forked before the parent thread is stopped.
509 */
510 CPR_DEBUG(CPR_DEBUG1, "\nstopping user threads...");
511 CPR_STAT_EVENT_START(" stop users");
512 cpr_set_substate(C_ST_STOP_USER_THREADS);
513 PMD(PMD_SX, ("cpr_suspend: stop user threads\n"))
514 if (rc = cpr_stop_user_threads())
515 return (rc);
516 CPR_STAT_EVENT_END(" stop users");
517 CPR_DEBUG(CPR_DEBUG1, "done\n");
518
519 PMD(PMD_SX, ("cpr_suspend: save direct levels\n"))
520 pm_save_direct_levels();
521
522 /*
523 * User threads are stopped. We will start communicating with the
524 * user via prom_printf (some debug output may have already happened)
525 * so let anybody who cares know about this (bug 4096122)
526 */
527 (void) callb_execute_class(CB_CL_CPR_PROMPRINTF, CB_CODE_CPR_CHKPT);
528
529 PMD(PMD_SX, ("cpr_suspend: send notice\n"))
530 #ifndef DEBUG
531 cpr_send_notice();
532 if (cpr_debug)
533 prom_printf("\n");
534 #endif
535
536 PMD(PMD_SX, ("cpr_suspend: POST USER callback\n"))
537 (void) callb_execute_class(CB_CL_CPR_POST_USER, CB_CODE_CPR_CHKPT);
538
539 /*
540 * Reattach any drivers which originally exported the
541 * no-involuntary-power-cycles property. We need to do this before
542 * stopping kernel threads because modload is implemented using
543 * a kernel thread.
544 */
545 cpr_set_substate(C_ST_PM_REATTACH_NOINVOL);
546 PMD(PMD_SX, ("cpr_suspend: reattach noinvol\n"))
547 if (!pm_reattach_noinvol())
548 return (ENXIO);
549
550 #if defined(__sparc)
551 ASSERT(sleeptype == CPR_TODISK);
552 /*
553 * if ufs logging is enabled, we need to disable before
554 * stopping kernel threads so that ufs delete and roll
555 * threads can do the work.
556 */
557 cpr_set_substate(C_ST_DISABLE_UFS_LOGGING);
558 if (rc = cpr_ufs_logging(0))
559 return (rc);
560
561 /*
562 * Use sync_all to swap out all user pages and find out how much
563 * extra space needed for user pages that don't have back store
564 * space left.
565 */
566 CPR_STAT_EVENT_START(" swapout upages");
567 vfs_sync(SYNC_ALL);
568 CPR_STAT_EVENT_END(" swapout upages");
569
570 cpr_set_bitmap_size();
571
572 alloc_statefile:
573 /*
574 * If our last state was C_ST_DUMP_NOSPC, we're trying to
575 * realloc the statefile, otherwise this is the first attempt.
576 */
577 sf_realloc = (CPR->c_substate == C_ST_DUMP_NOSPC) ? 1 : 0;
578
579 CPR_STAT_EVENT_START(" alloc statefile");
580 cpr_set_substate(C_ST_STATEF_ALLOC);
581 if (rc = cpr_alloc_statefile(sf_realloc)) {
582 if (sf_realloc)
583 errp("realloc failed\n");
584 return (rc);
585 }
586 CPR_STAT_EVENT_END(" alloc statefile");
587
588 /*
589 * Sync the filesystem to preserve its integrity.
590 *
591 * This sync is also used to flush out all B_DELWRI buffers
592 * (fs cache) which are mapped and neither dirty nor referenced
593 * before cpr_invalidate_pages destroys them.
594 * fsflush does similar thing.
595 */
596 sync();
597
598 /*
599 * destroy all clean file mapped kernel pages
600 */
601 CPR_STAT_EVENT_START(" clean pages");
602 CPR_DEBUG(CPR_DEBUG1, ("cleaning up mapped pages..."));
603 (void) callb_execute_class(CB_CL_CPR_VM, CB_CODE_CPR_CHKPT);
604 CPR_DEBUG(CPR_DEBUG1, ("done\n"));
605 CPR_STAT_EVENT_END(" clean pages");
606 #endif
607
608
609 /*
610 * Hooks needed by lock manager prior to suspending.
611 * Refer to code for more comments.
612 */
613 PMD(PMD_SX, ("cpr_suspend: lock mgr\n"))
614 cpr_lock_mgr(lm_cprsuspend);
615
616 /*
617 * Now suspend all the devices
618 */
619 CPR_STAT_EVENT_START(" stop drivers");
620 CPR_DEBUG(CPR_DEBUG1, "suspending drivers...");
621 cpr_set_substate(C_ST_SUSPEND_DEVICES);
622 pm_powering_down = 1;
623 PMD(PMD_SX, ("cpr_suspend: suspending devices\n"))
624 rc = cpr_suspend_devices(ddi_root_node());
625 pm_powering_down = 0;
626 if (rc)
627 return (rc);
628 CPR_DEBUG(CPR_DEBUG1, "done\n");
629 CPR_STAT_EVENT_END(" stop drivers");
630
631 /*
632 * Stop all daemon activities
633 */
634 cpr_set_substate(C_ST_STOP_KERNEL_THREADS);
635 PMD(PMD_SX, ("cpr_suspend: stopping kernel threads\n"))
636 if (skt_rc = cpr_stop_kernel_threads())
637 return (skt_rc);
638
639 PMD(PMD_SX, ("cpr_suspend: POST KERNEL callback\n"))
640 (void) callb_execute_class(CB_CL_CPR_POST_KERNEL, CB_CODE_CPR_CHKPT);
641
642 PMD(PMD_SX, ("cpr_suspend: reattach noinvol fini\n"))
643 pm_reattach_noinvol_fini();
644
645 cpr_sae(1);
646
647 PMD(PMD_SX, ("cpr_suspend: CPR CALLOUT callback\n"))
648 (void) callb_execute_class(CB_CL_CPR_CALLOUT, CB_CODE_CPR_CHKPT);
649
650 if (sleeptype == CPR_TODISK) {
651 /*
652 * It's safer to do tod_get before we disable all intr.
653 */
654 CPR_STAT_EVENT_START(" write statefile");
655 }
656
657 /*
658 * it's time to ignore the outside world, stop the real time
659 * clock and disable any further intrpt activity.
660 */
661 PMD(PMD_SX, ("cpr_suspend: handle xc\n"))
662 i_cpr_handle_xc(1); /* turn it on to disable xc assertion */
663
664 mutex_enter(&cpu_lock);
665 PMD(PMD_SX, ("cpr_suspend: cyclic suspend\n"))
666 cyclic_suspend();
667 mutex_exit(&cpu_lock);
668
669 /*
670 * Due to the different methods of resuming the system between
671 * CPR_TODISK (boot cprboot on SPARC, which reloads kernel image)
672 * and CPR_TORAM (restart via reset into existing kernel image)
673 * cpus are not suspended and restored in the SPARC case, since it
674 * is necessary to restart the cpus and pause them before restoring
675 * the OBP image
676 */
677
678 #if defined(__x86)
679
680 /* pause aux cpus */
681 PMD(PMD_SX, ("pause aux cpus\n"))
682
683 cpr_set_substate(C_ST_MP_PAUSED);
684
685 if ((rc = cpr_suspend_cpus()) != 0)
686 return (rc);
687 #endif
688
689 PMD(PMD_SX, ("cpr_suspend: stop intr\n"))
690 i_cpr_stop_intr();
691 CPR_DEBUG(CPR_DEBUG1, "interrupt is stopped\n");
692
693 /*
694 * Since we will now disable the mechanism that causes prom_printfs
695 * to power up (if needed) the console fb/monitor, we assert that
696 * it must be up now.
697 */
698 ASSERT(pm_cfb_is_up());
699 PMD(PMD_SX, ("cpr_suspend: prom suspend prepost\n"))
700 prom_suspend_prepost();
701
702 #if defined(__sparc)
703 /*
704 * getting ready to write ourself out, flush the register
705 * windows to make sure that our stack is good when we
706 * come back on the resume side.
707 */
708 flush_windows();
709 #endif
710
711 /*
712 * For S3, we're done
713 */
714 if (sleeptype == CPR_TORAM) {
715 PMD(PMD_SX, ("cpr_suspend rets %x\n", rc))
716 cpr_set_substate(C_ST_NODUMP);
717 return (rc);
718 }
719 #if defined(__sparc)
720 /*
721 * FATAL: NO MORE MEMORY ALLOCATION ALLOWED AFTER THIS POINT!!!
722 *
723 * The system is quiesced at this point, we are ready to either dump
724 * to the state file for a extended sleep or a simple shutdown for
725 * systems with non-volatile memory.
726 */
727
728 /*
729 * special handling for reusable:
730 */
731 if (cpr_reusable_mode) {
732 cpr_set_substate(C_ST_SETPROPS_1);
733 if (nverr = cpr_set_properties(1))
734 return (nverr);
735 }
736
737 cpr_set_substate(C_ST_DUMP);
738 rc = cpr_dump(C_VP);
739
740 /*
741 * if any error occurred during dump, more
742 * special handling for reusable:
743 */
744 if (rc && cpr_reusable_mode) {
745 cpr_set_substate(C_ST_SETPROPS_0);
746 if (nverr = cpr_set_properties(0))
747 return (nverr);
748 }
749
750 if (rc == ENOSPC) {
751 cpr_set_substate(C_ST_DUMP_NOSPC);
752 (void) cpr_resume(sleeptype);
753 goto alloc_statefile;
754 } else if (rc == 0) {
755 if (cpr_reusable_mode) {
756 cpr_set_substate(C_ST_REUSABLE);
757 longjmp(&ttolwp(curthread)->lwp_qsav);
758 } else
759 rc = cpr_set_properties(1);
760 }
761 #endif
762 PMD(PMD_SX, ("cpr_suspend: return %d\n", rc))
763 return (rc);
764 }
765
766 void
767 cpr_resume_cpus(void)
768 {
769 /*
770 * this is a cut down version of start_other_cpus()
771 * just do the initialization to wake the other cpus
772 */
773
774 #if defined(__x86)
775 /*
776 * Initialize our syscall handlers
777 */
778 init_cpu_syscall(CPU);
779
780 #endif
781
782 i_cpr_pre_resume_cpus();
783
784 /*
785 * Restart the paused cpus
786 */
787 mutex_enter(&cpu_lock);
788 start_cpus();
789 mutex_exit(&cpu_lock);
790
791 i_cpr_post_resume_cpus();
792
793 mutex_enter(&cpu_lock);
794 /*
795 * Restore this cpu to use the regular cpu_pause(), so that
796 * online and offline will work correctly
797 */
798 cpu_pause_func = NULL;
799
800 /*
801 * clear the affinity set in cpr_suspend_cpus()
802 */
803 affinity_clear();
804
805 /*
806 * offline all the cpus that were brought online during suspend
807 */
808 cpr_restore_offline();
809
810 mutex_exit(&cpu_lock);
811 }
812
813 void
814 cpr_unpause_cpus(void)
815 {
816 /*
817 * Now restore the system back to what it was before we suspended
818 */
819
820 PMD(PMD_SX, ("cpr_unpause_cpus: restoring system\n"))
821
822 mutex_enter(&cpu_lock);
823
824 /*
825 * Restore this cpu to use the regular cpu_pause(), so that
826 * online and offline will work correctly
827 */
828 cpu_pause_func = NULL;
829
830 /*
831 * Restart the paused cpus
832 */
833 start_cpus();
834
835 /*
836 * clear the affinity set in cpr_suspend_cpus()
837 */
838 affinity_clear();
839
840 /*
841 * offline all the cpus that were brought online during suspend
842 */
843 cpr_restore_offline();
844
845 mutex_exit(&cpu_lock);
846 }
847
848 /*
849 * Bring the system back up from a checkpoint, at this point
850 * the VM has been minimally restored by boot, the following
851 * are executed sequentially:
852 *
853 * - machdep setup and enable interrupts (mp startup if it's mp)
854 * - resume all devices
855 * - restart daemons
856 * - put all threads back on run queue
857 */
858 static int
859 cpr_resume(int sleeptype)
860 {
861 cpr_time_t pwron_tv, *ctp;
862 char *str;
863 int rc = 0;
864
865 /*
866 * The following switch is used to resume the system
867 * that was suspended to a different level.
868 */
869 CPR_DEBUG(CPR_DEBUG1, "\nEntering cpr_resume...\n");
870 PMD(PMD_SX, ("cpr_resume %x\n", sleeptype))
871
872 /*
873 * Note:
874 *
875 * The rollback labels rb_xyz do not represent the cpr resume
876 * state when event 'xyz' has happened. Instead they represent
877 * the state during cpr suspend when event 'xyz' was being
878 * entered (and where cpr suspend failed). The actual call that
879 * failed may also need to be partially rolled back, since they
880 * aren't atomic in most cases. In other words, rb_xyz means
881 * "roll back all cpr suspend events that happened before 'xyz',
882 * and the one that caused the failure, if necessary."
883 */
884 switch (CPR->c_substate) {
885 #if defined(__sparc)
886 case C_ST_DUMP:
887 /*
888 * This is most likely a full-fledged cpr_resume after
889 * a complete and successful cpr suspend. Just roll back
890 * everything.
891 */
892 ASSERT(sleeptype == CPR_TODISK);
893 break;
894
895 case C_ST_REUSABLE:
896 case C_ST_DUMP_NOSPC:
897 case C_ST_SETPROPS_0:
898 case C_ST_SETPROPS_1:
899 /*
900 * C_ST_REUSABLE and C_ST_DUMP_NOSPC are the only two
901 * special switch cases here. The other two do not have
902 * any state change during cpr_suspend() that needs to
903 * be rolled back. But these are exit points from
904 * cpr_suspend, so theoretically (or in the future), it
905 * is possible that a need for roll back of a state
906 * change arises between these exit points.
907 */
908 ASSERT(sleeptype == CPR_TODISK);
909 goto rb_dump;
910 #endif
911
912 case C_ST_NODUMP:
913 PMD(PMD_SX, ("cpr_resume: NODUMP\n"))
914 goto rb_nodump;
915
916 case C_ST_STOP_KERNEL_THREADS:
917 PMD(PMD_SX, ("cpr_resume: STOP_KERNEL_THREADS\n"))
918 goto rb_stop_kernel_threads;
919
920 case C_ST_SUSPEND_DEVICES:
921 PMD(PMD_SX, ("cpr_resume: SUSPEND_DEVICES\n"))
922 goto rb_suspend_devices;
923
924 #if defined(__sparc)
925 case C_ST_STATEF_ALLOC:
926 ASSERT(sleeptype == CPR_TODISK);
927 goto rb_statef_alloc;
928
929 case C_ST_DISABLE_UFS_LOGGING:
930 ASSERT(sleeptype == CPR_TODISK);
931 goto rb_disable_ufs_logging;
932 #endif
933
934 case C_ST_PM_REATTACH_NOINVOL:
935 PMD(PMD_SX, ("cpr_resume: REATTACH_NOINVOL\n"))
936 goto rb_pm_reattach_noinvol;
937
938 case C_ST_STOP_USER_THREADS:
939 PMD(PMD_SX, ("cpr_resume: STOP_USER_THREADS\n"))
940 goto rb_stop_user_threads;
941
942 #if defined(__sparc)
943 case C_ST_MP_OFFLINE:
944 PMD(PMD_SX, ("cpr_resume: MP_OFFLINE\n"))
945 goto rb_mp_offline;
946 #endif
947
948 #if defined(__x86)
949 case C_ST_MP_PAUSED:
950 PMD(PMD_SX, ("cpr_resume: MP_PAUSED\n"))
951 goto rb_mp_paused;
952 #endif
953
954
955 default:
956 PMD(PMD_SX, ("cpr_resume: others\n"))
957 goto rb_others;
958 }
959
960 rb_all:
961 /*
962 * perform platform-dependent initialization
963 */
964 if (cpr_suspend_succeeded)
965 i_cpr_machdep_setup();
966
967 /*
968 * system did not really go down if we jump here
969 */
970 rb_dump:
971 /*
972 * IMPORTANT: SENSITIVE RESUME SEQUENCE
973 *
974 * DO NOT ADD ANY INITIALIZATION STEP BEFORE THIS POINT!!
975 */
976 rb_nodump:
977 /*
978 * If we did suspend to RAM, we didn't generate a dump
979 */
980 PMD(PMD_SX, ("cpr_resume: CPR DMA callback\n"))
981 (void) callb_execute_class(CB_CL_CPR_DMA, CB_CODE_CPR_RESUME);
982 if (cpr_suspend_succeeded) {
983 PMD(PMD_SX, ("cpr_resume: CPR RPC callback\n"))
984 (void) callb_execute_class(CB_CL_CPR_RPC, CB_CODE_CPR_RESUME);
985 }
986
987 prom_resume_prepost();
988 #if !defined(__sparc)
989 /*
990 * Need to sync the software clock with the hardware clock.
991 * On Sparc, this occurs in the sparc-specific cbe. However
992 * on x86 this needs to be handled _before_ we bring other cpu's
993 * back online. So we call a resume function in timestamp.c
994 */
995 if (tsc_resume_in_cyclic == 0)
996 tsc_resume();
997
998 #endif
999
1000 #if defined(__sparc)
1001 if (cpr_suspend_succeeded && (boothowto & RB_DEBUG))
1002 kdi_dvec_cpr_restart();
1003 #endif
1004
1005
1006 #if defined(__x86)
1007 rb_mp_paused:
1008 PT(PT_RMPO);
1009 PMD(PMD_SX, ("resume aux cpus\n"))
1010
1011 if (cpr_suspend_succeeded) {
1012 cpr_resume_cpus();
1013 } else {
1014 cpr_unpause_cpus();
1015 }
1016 #endif
1017
1018 /*
1019 * let the tmp callout catch up.
1020 */
1021 PMD(PMD_SX, ("cpr_resume: CPR CALLOUT callback\n"))
1022 (void) callb_execute_class(CB_CL_CPR_CALLOUT, CB_CODE_CPR_RESUME);
1023
1024 i_cpr_enable_intr();
1025
1026 mutex_enter(&cpu_lock);
1027 PMD(PMD_SX, ("cpr_resume: cyclic resume\n"))
1028 cyclic_resume();
1029 mutex_exit(&cpu_lock);
1030
1031 PMD(PMD_SX, ("cpr_resume: handle xc\n"))
1032 i_cpr_handle_xc(0); /* turn it off to allow xc assertion */
1033
1034 PMD(PMD_SX, ("cpr_resume: CPR POST KERNEL callback\n"))
1035 (void) callb_execute_class(CB_CL_CPR_POST_KERNEL, CB_CODE_CPR_RESUME);
1036
1037 /*
1038 * statistics gathering
1039 */
1040 if (cpr_suspend_succeeded) {
1041 /*
1042 * Prevent false alarm in tod_validate() due to tod
1043 * value change between suspend and resume
1044 */
1045 cpr_tod_status_set(TOD_CPR_RESUME_DONE);
1046
1047 cpr_convert_promtime(&pwron_tv);
1048
1049 ctp = &cpr_term.tm_shutdown;
1050 if (sleeptype == CPR_TODISK)
1051 CPR_STAT_EVENT_END_TMZ(" write statefile", ctp);
1052 CPR_STAT_EVENT_END_TMZ("Suspend Total", ctp);
1053
1054 CPR_STAT_EVENT_START_TMZ("Resume Total", &pwron_tv);
1055
1056 str = " prom time";
1057 CPR_STAT_EVENT_START_TMZ(str, &pwron_tv);
1058 ctp = &cpr_term.tm_cprboot_start;
1059 CPR_STAT_EVENT_END_TMZ(str, ctp);
1060
1061 str = " read statefile";
1062 CPR_STAT_EVENT_START_TMZ(str, ctp);
1063 ctp = &cpr_term.tm_cprboot_end;
1064 CPR_STAT_EVENT_END_TMZ(str, ctp);
1065 }
1066
1067 rb_stop_kernel_threads:
1068 /*
1069 * Put all threads back to where they belong; get the kernel
1070 * daemons straightened up too. Note that the callback table
1071 * locked during cpr_stop_kernel_threads() is released only
1072 * in cpr_start_kernel_threads(). Ensure modunloading is
1073 * disabled before starting kernel threads, we don't want
1074 * modunload thread to start changing device tree underneath.
1075 */
1076 PMD(PMD_SX, ("cpr_resume: modunload disable\n"))
1077 modunload_disable();
1078 PMD(PMD_SX, ("cpr_resume: start kernel threads\n"))
1079 cpr_start_kernel_threads();
1080
1081 rb_suspend_devices:
1082 CPR_DEBUG(CPR_DEBUG1, "resuming devices...");
1083 CPR_STAT_EVENT_START(" start drivers");
1084
1085 PMD(PMD_SX,
1086 ("cpr_resume: rb_suspend_devices: cpr_resume_uniproc = %d\n",
1087 cpr_resume_uniproc))
1088
1089 #if defined(__x86)
1090 /*
1091 * If cpr_resume_uniproc is set, then pause all the other cpus
1092 * apart from the current cpu, so that broken drivers that think
1093 * that they are on a uniprocessor machine will resume
1094 */
1095 if (cpr_resume_uniproc) {
1096 mutex_enter(&cpu_lock);
1097 pause_cpus(NULL);
1098 mutex_exit(&cpu_lock);
1099 }
1100 #endif
1101
1102 /*
1103 * The policy here is to continue resume everything we can if we did
1104 * not successfully finish suspend; and panic if we are coming back
1105 * from a fully suspended system.
1106 */
1107 PMD(PMD_SX, ("cpr_resume: resume devices\n"))
1108 rc = cpr_resume_devices(ddi_root_node(), 0);
1109
1110 cpr_sae(0);
1111
1112 str = "Failed to resume one or more devices.";
1113
1114 if (rc) {
1115 if (CPR->c_substate == C_ST_DUMP ||
1116 (sleeptype == CPR_TORAM &&
1117 CPR->c_substate == C_ST_NODUMP)) {
1118 if (cpr_test_point == FORCE_SUSPEND_TO_RAM) {
1119 PMD(PMD_SX, ("cpr_resume: resume device "
1120 "warn\n"))
1121 cpr_err(CE_WARN, str);
1122 } else {
1123 PMD(PMD_SX, ("cpr_resume: resume device "
1124 "panic\n"))
1125 cpr_err(CE_PANIC, str);
1126 }
1127 } else {
1128 PMD(PMD_SX, ("cpr_resume: resume device warn\n"))
1129 cpr_err(CE_WARN, str);
1130 }
1131 }
1132
1133 CPR_STAT_EVENT_END(" start drivers");
1134 CPR_DEBUG(CPR_DEBUG1, "done\n");
1135
1136 #if defined(__x86)
1137 /*
1138 * If cpr_resume_uniproc is set, then unpause all the processors
1139 * that were paused before resuming the drivers
1140 */
1141 if (cpr_resume_uniproc) {
1142 mutex_enter(&cpu_lock);
1143 start_cpus();
1144 mutex_exit(&cpu_lock);
1145 }
1146 #endif
1147
1148 /*
1149 * If we had disabled modunloading in this cpr resume cycle (i.e. we
1150 * resumed from a state earlier than C_ST_SUSPEND_DEVICES), re-enable
1151 * modunloading now.
1152 */
1153 if (CPR->c_substate != C_ST_SUSPEND_DEVICES) {
1154 PMD(PMD_SX, ("cpr_resume: modload enable\n"))
1155 modunload_enable();
1156 }
1157
1158 /*
1159 * Hooks needed by lock manager prior to resuming.
1160 * Refer to code for more comments.
1161 */
1162 PMD(PMD_SX, ("cpr_resume: lock mgr\n"))
1163 cpr_lock_mgr(lm_cprresume);
1164
1165 #if defined(__sparc)
1166 /*
1167 * This is a partial (half) resume during cpr suspend, we
1168 * haven't yet given up on the suspend. On return from here,
1169 * cpr_suspend() will try to reallocate and retry the suspend.
1170 */
1171 if (CPR->c_substate == C_ST_DUMP_NOSPC) {
1172 return (0);
1173 }
1174
1175 if (sleeptype == CPR_TODISK) {
1176 rb_statef_alloc:
1177 cpr_statef_close();
1178
1179 rb_disable_ufs_logging:
1180 /*
1181 * if ufs logging was disabled, re-enable
1182 */
1183 (void) cpr_ufs_logging(1);
1184 }
1185 #endif
1186
1187 rb_pm_reattach_noinvol:
1188 /*
1189 * When pm_reattach_noinvol() succeeds, modunload_thread will
1190 * remain disabled until after cpr suspend passes the
1191 * C_ST_STOP_KERNEL_THREADS state. If any failure happens before
1192 * cpr suspend reaches this state, we'll need to enable modunload
1193 * thread during rollback.
1194 */
1195 if (CPR->c_substate == C_ST_DISABLE_UFS_LOGGING ||
1196 CPR->c_substate == C_ST_STATEF_ALLOC ||
1197 CPR->c_substate == C_ST_SUSPEND_DEVICES ||
1198 CPR->c_substate == C_ST_STOP_KERNEL_THREADS) {
1199 PMD(PMD_SX, ("cpr_resume: reattach noinvol fini\n"))
1200 pm_reattach_noinvol_fini();
1201 }
1202
1203 PMD(PMD_SX, ("cpr_resume: CPR POST USER callback\n"))
1204 (void) callb_execute_class(CB_CL_CPR_POST_USER, CB_CODE_CPR_RESUME);
1205 PMD(PMD_SX, ("cpr_resume: CPR PROMPRINTF callback\n"))
1206 (void) callb_execute_class(CB_CL_CPR_PROMPRINTF, CB_CODE_CPR_RESUME);
1207
1208 PMD(PMD_SX, ("cpr_resume: restore direct levels\n"))
1209 pm_restore_direct_levels();
1210
1211 rb_stop_user_threads:
1212 CPR_DEBUG(CPR_DEBUG1, "starting user threads...");
1213 PMD(PMD_SX, ("cpr_resume: starting user threads\n"))
1214 cpr_start_user_threads();
1215 CPR_DEBUG(CPR_DEBUG1, "done\n");
1216 /*
1217 * Ask Xorg to resume the frame buffer, and wait for it to happen
1218 */
1219 mutex_enter(&srn_clone_lock);
1220 if (srn_signal) {
1221 PMD(PMD_SX, ("cpr_suspend: (*srn_signal)(..., "
1222 "SRN_NORMAL_RESUME)\n"))
1223 srn_inuse = 1; /* because (*srn_signal) cv_waits */
1224 (*srn_signal)(SRN_TYPE_APM, SRN_NORMAL_RESUME);
1225 srn_inuse = 0;
1226 } else {
1227 PMD(PMD_SX, ("cpr_suspend: srn_signal NULL\n"))
1228 }
1229 mutex_exit(&srn_clone_lock);
1230
1231 #if defined(__sparc)
1232 rb_mp_offline:
1233 if (cpr_mp_online())
1234 cpr_err(CE_WARN, "Failed to online all the processors.");
1235 #endif
1236
1237 rb_others:
1238 PMD(PMD_SX, ("cpr_resume: dep thread\n"))
1239 pm_dispatch_to_dep_thread(PM_DEP_WK_CPR_RESUME, NULL, NULL,
1240 PM_DEP_WAIT, NULL, 0);
1241
1242 PMD(PMD_SX, ("cpr_resume: CPR PM callback\n"))
1243 (void) callb_execute_class(CB_CL_CPR_PM, CB_CODE_CPR_RESUME);
1244
1245 if (cpr_suspend_succeeded) {
1246 cpr_stat_record_events();
1247 }
1248
1249 #if defined(__sparc)
1250 if (sleeptype == CPR_TODISK && !cpr_reusable_mode)
1251 cpr_clear_definfo();
1252 #endif
1253
1254 i_cpr_free_cpus();
1255 CPR_DEBUG(CPR_DEBUG1, "Sending SIGTHAW...");
1256 PMD(PMD_SX, ("cpr_resume: SIGTHAW\n"))
1257 cpr_signal_user(SIGTHAW);
1258 CPR_DEBUG(CPR_DEBUG1, "done\n");
1259
1260 CPR_STAT_EVENT_END("Resume Total");
1261
1262 CPR_STAT_EVENT_START_TMZ("WHOLE CYCLE", &wholecycle_tv);
1263 CPR_STAT_EVENT_END("WHOLE CYCLE");
1264
1265 if (cpr_debug & CPR_DEBUG1)
1266 cmn_err(CE_CONT, "\nThe system is back where you left!\n");
1267
1268 CPR_STAT_EVENT_START("POST CPR DELAY");
1269
1270 #ifdef CPR_STAT
1271 ctp = &cpr_term.tm_shutdown;
1272 CPR_STAT_EVENT_START_TMZ("PWROFF TIME", ctp);
1273 CPR_STAT_EVENT_END_TMZ("PWROFF TIME", &pwron_tv);
1274
1275 CPR_STAT_EVENT_PRINT();
1276 #endif /* CPR_STAT */
1277
1278 PMD(PMD_SX, ("cpr_resume returns %x\n", rc))
1279 return (rc);
1280 }
1281
1282 static void
1283 cpr_suspend_init(int sleeptype)
1284 {
1285 cpr_time_t *ctp;
1286
1287 cpr_stat_init();
1288
1289 /*
1290 * If cpr_suspend() failed before cpr_dump() gets a chance
1291 * to reinitialize the terminator of the statefile,
1292 * the values of the old terminator will still linger around.
1293 * Since the terminator contains information that we need to
1294 * decide whether suspend succeeded or not, we need to
1295 * reinitialize it as early as possible.
1296 */
1297 cpr_term.real_statef_size = 0;
1298 ctp = &cpr_term.tm_shutdown;
1299 bzero(ctp, sizeof (*ctp));
1300 ctp = &cpr_term.tm_cprboot_start;
1301 bzero(ctp, sizeof (*ctp));
1302 ctp = &cpr_term.tm_cprboot_end;
1303 bzero(ctp, sizeof (*ctp));
1304
1305 if (sleeptype == CPR_TODISK) {
1306 /*
1307 * Lookup the physical address of our thread structure.
1308 * This should never be invalid and the entire thread structure
1309 * is expected to reside within the same pfn.
1310 */
1311 curthreadpfn = hat_getpfnum(kas.a_hat, (caddr_t)curthread);
1312 ASSERT(curthreadpfn != PFN_INVALID);
1313 ASSERT(curthreadpfn == hat_getpfnum(kas.a_hat,
1314 (caddr_t)curthread + sizeof (kthread_t) - 1));
1315 }
1316
1317 cpr_suspend_succeeded = 0;
1318 }
1319
1320 /*
1321 * bring all the offline cpus online
1322 */
1323 static int
1324 cpr_all_online(void)
1325 {
1326 int rc = 0;
1327
1328 #ifdef __sparc
1329 /*
1330 * do nothing
1331 */
1332 #else
1333
1334 cpu_t *cp;
1335
1336 ASSERT(MUTEX_HELD(&cpu_lock));
1337
1338 cp = cpu_list;
1339 do {
1340 cp->cpu_cpr_flags &= ~CPU_CPR_ONLINE;
1341 if (!CPU_ACTIVE(cp)) {
1342 if ((rc = cpu_online(cp)) != 0)
1343 break;
1344 CPU_SET_CPR_FLAGS(cp, CPU_CPR_ONLINE);
1345 }
1346 } while ((cp = cp->cpu_next) != cpu_list);
1347
1348 if (rc) {
1349 /*
1350 * an online operation failed so offline the cpus
1351 * that were onlined above to restore the system
1352 * to its original state
1353 */
1354 cpr_restore_offline();
1355 }
1356 #endif
1357 return (rc);
1358 }
1359
1360 /*
1361 * offline all the cpus that were brought online by cpr_all_online()
1362 */
1363 static void
1364 cpr_restore_offline(void)
1365 {
1366
1367 #ifdef __sparc
1368 /*
1369 * do nothing
1370 */
1371 #else
1372
1373 cpu_t *cp;
1374 int rc = 0;
1375
1376 ASSERT(MUTEX_HELD(&cpu_lock));
1377
1378 cp = cpu_list;
1379 do {
1380 if (CPU_CPR_IS_ONLINE(cp)) {
1381 rc = cpu_offline(cp, 0);
1382 /*
1383 * this offline should work, since the cpu was
1384 * offline originally and was successfully onlined
1385 * by cpr_all_online()
1386 */
1387 ASSERT(rc == 0);
1388 cp->cpu_cpr_flags &= ~CPU_CPR_ONLINE;
1389 }
1390 } while ((cp = cp->cpu_next) != cpu_list);
1391
1392 #endif
1393
1394 }