1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
|
/* Copyright 2013-2014 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <skiboot.h>
#include <opal.h>
#include <stack.h>
#include <lock.h>
#include <fsp.h>
#include <cpu.h>
#include <interrupts.h>
#include <op-panel.h>
#include <device.h>
#include <console.h>
#include <trace.h>
#include <timebase.h>
#include <affinity.h>
#include <opal-msg.h>
#include <timer.h>
#include <elf-abi.h>
#include <errorlog.h>
#include <occ.h>
/* Pending events to signal via opal_poll_events */
uint64_t opal_pending_events;
/* OPAL dispatch table defined in head.S */
extern uint64_t opal_branch_table[];
/* Number of args expected for each call. */
static u8 opal_num_args[OPAL_LAST+1];
/* OPAL anchor node */
struct dt_node *opal_node;
/* mask of dynamic vs fixed events; opal_allocate_dynamic_event will
* only allocate from this range */
static const uint64_t opal_dynamic_events_mask = 0xffffffff00000000ul;
static uint64_t opal_dynamic_events;
extern uint32_t attn_trigger;
extern uint32_t hir_trigger;
/* We make this look like a Surveillance error, even though it really
* isn't one.
*/
DEFINE_LOG_ENTRY(OPAL_INJECTED_HIR, OPAL_MISC_ERR_EVT, OPAL_SURVEILLANCE,
OPAL_SURVEILLANCE_ERR, OPAL_PREDICTIVE_ERR_GENERAL,
OPAL_MISCELLANEOUS_INFO_ONLY);
void opal_table_init(void)
{
struct opal_table_entry *s = __opal_table_start;
struct opal_table_entry *e = __opal_table_end;
prlog(PR_DEBUG, "OPAL table: %p .. %p, branch table: %p\n",
s, e, opal_branch_table);
while(s < e) {
opal_branch_table[s->token] = function_entry_address(s->func);
opal_num_args[s->token] = s->nargs;
s++;
}
}
/* Called from head.S, thus no prototype */
long opal_bad_token(uint64_t token);
long opal_bad_token(uint64_t token)
{
/**
* @fwts-label OPALBadToken
* @fwts-advice OPAL was called with a bad token. On POWER8 and
* earlier, Linux kernels had a bug where they wouldn't check
* if firmware supported particular OPAL calls before making them.
* It is, in fact, harmless for these cases. On systems newer than
* POWER8, this should never happen and indicates a kernel bug
* where OPAL_CHECK_TOKEN isn't being called where it should be.
*/
prlog(PR_ERR, "OPAL: Called with bad token %lld !\n", token);
return OPAL_PARAMETER;
}
static void opal_trace_entry(struct stack_frame *eframe __unused)
{
#ifdef OPAL_TRACE_ENTRY
union trace t;
unsigned nargs, i;
if (eframe->gpr[0] > OPAL_LAST)
nargs = 0;
else
nargs = opal_num_args[eframe->gpr[0]];
t.opal.token = cpu_to_be64(eframe->gpr[0]);
t.opal.lr = cpu_to_be64(eframe->lr);
t.opal.sp = cpu_to_be64(eframe->gpr[1]);
for(i=0; i<nargs; i++)
t.opal.r3_to_11[i] = cpu_to_be64(eframe->gpr[3+i]);
trace_add(&t, TRACE_OPAL, offsetof(struct trace_opal, r3_to_11[nargs]));
#endif
}
/*
* opal_quiesce_state is used as a lock. Don't use an actual lock to avoid
* lock busting.
*/
static uint32_t opal_quiesce_state; /* 0 or QUIESCE_HOLD/QUIESCE_REJECT */
static int32_t opal_quiesce_owner; /* PIR */
static int32_t opal_quiesce_target; /* -1 or PIR */
static int64_t opal_check_token(uint64_t token);
/* Called from head.S, thus no prototype */
int64_t opal_entry_check(struct stack_frame *eframe);
int64_t opal_entry_check(struct stack_frame *eframe)
{
struct cpu_thread *cpu = this_cpu();
uint64_t token = eframe->gpr[0];
if (cpu->pir != mfspr(SPR_PIR)) {
printf("CPU MISMATCH ! PIR=%04lx cpu @%p -> pir=%04x token=%llu\n",
mfspr(SPR_PIR), cpu, cpu->pir, token);
abort();
}
opal_trace_entry(eframe);
if (!opal_check_token(token))
return opal_bad_token(token);
if (!opal_quiesce_state && cpu->in_opal_call > 1) {
disable_fast_reboot("Kernel re-entered OPAL");
switch (token) {
case OPAL_CONSOLE_READ:
case OPAL_CONSOLE_WRITE:
case OPAL_CONSOLE_WRITE_BUFFER_SPACE:
case OPAL_CONSOLE_FLUSH:
case OPAL_POLL_EVENTS:
case OPAL_CHECK_TOKEN:
case OPAL_CEC_REBOOT:
case OPAL_CEC_REBOOT2:
case OPAL_SIGNAL_SYSTEM_RESET:
break;
default:
printf("CPU ATTEMPT TO RE-ENTER FIRMWARE! PIR=%04lx cpu @%p -> pir=%04x token=%llu\n",
mfspr(SPR_PIR), cpu, cpu->pir, token);
if (cpu->in_opal_call > 2) {
printf("Emergency stack is destroyed, can't continue.\n");
abort();
}
return OPAL_INTERNAL_ERROR;
}
}
return OPAL_SUCCESS;
}
int64_t opal_exit_check(int64_t retval, struct stack_frame *eframe);
int64_t opal_exit_check(int64_t retval, struct stack_frame *eframe)
{
struct cpu_thread *cpu = this_cpu();
uint64_t token = eframe->gpr[0];
if (!cpu->in_opal_call) {
disable_fast_reboot("Un-accounted firmware entry");
printf("CPU UN-ACCOUNTED FIRMWARE ENTRY! PIR=%04lx cpu @%p -> pir=%04x token=%llu retval=%lld\n",
mfspr(SPR_PIR), cpu, cpu->pir, token, retval);
cpu->in_opal_call++; /* avoid exit path underflowing */
} else {
if (cpu->in_opal_call > 2) {
printf("Emergency stack is destroyed, can't continue.\n");
abort();
}
if (!list_empty(&cpu->locks_held)) {
prlog(PR_ERR, "OPAL exiting with locks held, token=%llu retval=%lld\n",
token, retval);
drop_my_locks(true);
}
}
return retval;
}
int64_t opal_quiesce(uint32_t quiesce_type, int32_t cpu_target)
{
struct cpu_thread *cpu = this_cpu();
struct cpu_thread *target = NULL;
struct cpu_thread *c;
uint64_t end;
bool stuck = false;
if (cpu_target >= 0) {
target = find_cpu_by_server(cpu_target);
if (!target)
return OPAL_PARAMETER;
} else if (cpu_target != -1) {
return OPAL_PARAMETER;
}
if (quiesce_type == QUIESCE_HOLD || quiesce_type == QUIESCE_REJECT) {
if (cmpxchg32(&opal_quiesce_state, 0, quiesce_type) != 0) {
if (opal_quiesce_owner != cpu->pir) {
/*
* Nested is allowed for now just for
* internal uses, so an error is returned
* for OS callers, but no error message
* printed if we are nested.
*/
printf("opal_quiesce already quiescing\n");
}
return OPAL_BUSY;
}
opal_quiesce_owner = cpu->pir;
opal_quiesce_target = cpu_target;
}
if (opal_quiesce_owner != cpu->pir) {
printf("opal_quiesce CPU does not own quiesce state (must call QUIESCE_HOLD or QUIESCE_REJECT)\n");
return OPAL_BUSY;
}
/* Okay now we own the quiesce state */
if (quiesce_type == QUIESCE_RESUME ||
quiesce_type == QUIESCE_RESUME_FAST_REBOOT) {
bust_locks = false;
sync(); /* release barrier vs opal entry */
if (target) {
target->quiesce_opal_call = 0;
} else {
for_each_cpu(c) {
if (quiesce_type == QUIESCE_RESUME_FAST_REBOOT)
c->in_opal_call = 0;
if (c == cpu) {
assert(!c->quiesce_opal_call);
continue;
}
c->quiesce_opal_call = 0;
}
}
sync();
opal_quiesce_state = 0;
return OPAL_SUCCESS;
}
if (quiesce_type == QUIESCE_LOCK_BREAK) {
if (opal_quiesce_target != -1) {
printf("opal_quiesce has not quiesced all CPUs (must target -1)\n");
return OPAL_BUSY;
}
bust_locks = true;
return OPAL_SUCCESS;
}
if (target) {
target->quiesce_opal_call = quiesce_type;
} else {
for_each_cpu(c) {
if (c == cpu)
continue;
c->quiesce_opal_call = quiesce_type;
}
}
sync(); /* Order stores to quiesce_opal_call vs loads of in_opal_call */
end = mftb() + msecs_to_tb(1000);
smt_lowest();
if (target) {
while (target->in_opal_call) {
if (tb_compare(mftb(), end) == TB_AAFTERB) {
printf("OPAL quiesce CPU:%04x stuck in OPAL\n", target->pir);
stuck = true;
break;
}
barrier();
}
} else {
for_each_cpu(c) {
if (c == cpu)
continue;
while (c->in_opal_call) {
if (tb_compare(mftb(), end) == TB_AAFTERB) {
printf("OPAL quiesce CPU:%04x stuck in OPAL\n", c->pir);
stuck = true;
break;
}
barrier();
}
}
}
smt_medium();
sync(); /* acquire barrier vs opal entry */
if (stuck) {
printf("OPAL quiesce could not kick all CPUs out of OPAL\n");
return OPAL_PARTIAL;
}
return OPAL_SUCCESS;
}
opal_call(OPAL_QUIESCE, opal_quiesce, 2);
void __opal_register(uint64_t token, void *func, unsigned int nargs)
{
assert(token <= OPAL_LAST);
opal_branch_table[token] = function_entry_address(func);
opal_num_args[token] = nargs;
}
/*
* add_opal_firmware_exports_node: adds properties to the device-tree which
* the OS will then change into sysfs nodes.
* The properties must be placed under /ibm,opal/firmware/exports.
* The new sysfs nodes are created under /opal/exports.
* To be correctly exported the properties must contain:
* name
* base memory location (u64)
* size (u64)
*/
static void add_opal_firmware_exports_node(struct dt_node *node)
{
struct dt_node *exports = dt_new(node, "exports");
uint64_t sym_start = (uint64_t)__sym_map_start;
uint64_t sym_size = (uint64_t)__sym_map_end - sym_start;
/*
* These property names will be used by Linux as the user-visible file
* name, so make them meaningful if possible. We use _ as the separator
* here to remain consistent with existing file names in /sys/opal.
*/
dt_add_property_u64s(exports, "symbol_map", sym_start, sym_size);
dt_add_property_u64s(exports, "hdat_map", SPIRA_HEAP_BASE,
SPIRA_HEAP_SIZE);
#ifdef SKIBOOT_GCOV
dt_add_property_u64s(exports, "gcov", SKIBOOT_BASE,
HEAP_BASE - SKIBOOT_BASE);
#endif
}
static void add_opal_firmware_node(void)
{
struct dt_node *firmware = dt_new(opal_node, "firmware");
uint64_t sym_start = (uint64_t)__sym_map_start;
uint64_t sym_size = (uint64_t)__sym_map_end - sym_start;
dt_add_property_string(firmware, "compatible", "ibm,opal-firmware");
dt_add_property_string(firmware, "name", "firmware");
dt_add_property_string(firmware, "version", version);
/*
* As previous OS versions use symbol-map located at
* /ibm,opal/firmware we will keep a copy of symbol-map here
* for backwards compatibility
*/
dt_add_property_u64s(firmware, "symbol-map", sym_start, sym_size);
add_opal_firmware_exports_node(firmware);
}
void add_opal_node(void)
{
uint64_t base, entry, size;
extern uint32_t opal_entry;
struct dt_node *opal_event;
/* XXX TODO: Reorg this. We should create the base OPAL
* node early on, and have the various sub modules populate
* their own entries (console etc...)
*
* The logic of which console backend to use should be
* extracted
*/
entry = (uint64_t)&opal_entry;
base = SKIBOOT_BASE;
size = (CPU_STACKS_BASE +
(uint64_t)(cpu_max_pir + 1) * STACK_SIZE) - SKIBOOT_BASE;
opal_node = dt_new_check(dt_root, "ibm,opal");
dt_add_property_cells(opal_node, "#address-cells", 0);
dt_add_property_cells(opal_node, "#size-cells", 0);
if (proc_gen < proc_gen_p9)
dt_add_property_strings(opal_node, "compatible", "ibm,opal-v2",
"ibm,opal-v3");
else
dt_add_property_strings(opal_node, "compatible", "ibm,opal-v3");
dt_add_property_cells(opal_node, "opal-msg-async-num", OPAL_MAX_ASYNC_COMP);
dt_add_property_cells(opal_node, "opal-msg-size", sizeof(struct opal_msg));
dt_add_property_u64(opal_node, "opal-base-address", base);
dt_add_property_u64(opal_node, "opal-entry-address", entry);
dt_add_property_u64(opal_node, "opal-runtime-size", size);
/* Add irqchip interrupt controller */
opal_event = dt_new(opal_node, "event");
dt_add_property_strings(opal_event, "compatible", "ibm,opal-event");
dt_add_property_cells(opal_event, "#interrupt-cells", 0x1);
dt_add_property(opal_event, "interrupt-controller", 0, 0);
add_opal_firmware_node();
add_associativity_ref_point();
memcons_add_properties();
}
static struct lock evt_lock = LOCK_UNLOCKED;
void opal_update_pending_evt(uint64_t evt_mask, uint64_t evt_values)
{
uint64_t new_evts;
lock(&evt_lock);
new_evts = (opal_pending_events & ~evt_mask) | evt_values;
if (opal_pending_events != new_evts) {
uint64_t tok;
#ifdef OPAL_TRACE_EVT_CHG
printf("OPAL: Evt change: 0x%016llx -> 0x%016llx\n",
opal_pending_events, new_evts);
#endif
/*
* If an event gets *set* while we are in a different call chain
* than opal_handle_interrupt() or opal_handle_hmi(), then we
* artificially generate an interrupt (OCC interrupt specifically)
* to ensure that Linux properly broadcast the event change internally
*/
if ((new_evts & ~opal_pending_events) != 0) {
tok = this_cpu()->current_token;
if (tok != OPAL_HANDLE_INTERRUPT && tok != OPAL_HANDLE_HMI)
occ_send_dummy_interrupt();
}
opal_pending_events = new_evts;
}
unlock(&evt_lock);
}
uint64_t opal_dynamic_event_alloc(void)
{
uint64_t new_event;
int n;
lock(&evt_lock);
/* Create the event mask. This set-bit will be within the event mask
* iff there are free events, or out of the mask if there are no free
* events. If opal_dynamic_events is all ones (ie, all events are
* dynamic, and allocated), then ilog2 will return -1, and we'll have a
* zero mask.
*/
n = ilog2(~opal_dynamic_events);
new_event = 1ull << n;
/* Ensure we're still within the allocatable dynamic events range */
if (new_event & opal_dynamic_events_mask)
opal_dynamic_events |= new_event;
else
new_event = 0;
unlock(&evt_lock);
return new_event;
}
void opal_dynamic_event_free(uint64_t event)
{
lock(&evt_lock);
opal_dynamic_events &= ~event;
unlock(&evt_lock);
}
static uint64_t opal_test_func(uint64_t arg)
{
printf("OPAL: Test function called with arg 0x%llx\n", arg);
return 0xfeedf00d;
}
opal_call(OPAL_TEST, opal_test_func, 1);
struct opal_poll_entry {
struct list_node link;
void (*poller)(void *data);
void *data;
};
static struct list_head opal_pollers = LIST_HEAD_INIT(opal_pollers);
static struct lock opal_poll_lock = LOCK_UNLOCKED;
void opal_add_poller(void (*poller)(void *data), void *data)
{
struct opal_poll_entry *ent;
ent = zalloc(sizeof(struct opal_poll_entry));
assert(ent);
ent->poller = poller;
ent->data = data;
lock(&opal_poll_lock);
list_add_tail(&opal_pollers, &ent->link);
unlock(&opal_poll_lock);
}
void opal_del_poller(void (*poller)(void *data))
{
struct opal_poll_entry *ent;
/* XXX This is currently unused. To solve various "interesting"
* locking issues, the pollers are run locklessly, so if we were
* to free them, we would have to be careful, using something
* akin to RCU to synchronize with other OPAL entries. For now
* if anybody uses it, print a warning and leak the entry, don't
* free it.
*/
/**
* @fwts-label UnsupportedOPALdelpoller
* @fwts-advice Currently removing a poller is DANGEROUS and
* MUST NOT be done in production firmware.
*/
prlog(PR_ALERT, "WARNING: Unsupported opal_del_poller."
" Interesting locking issues, don't call this.\n");
lock(&opal_poll_lock);
list_for_each(&opal_pollers, ent, link) {
if (ent->poller == poller) {
list_del(&ent->link);
/* free(ent); */
break;
}
}
unlock(&opal_poll_lock);
}
void opal_run_pollers(void)
{
static int pollers_with_lock_warnings = 0;
static int poller_recursion = 0;
struct opal_poll_entry *poll_ent;
bool was_in_poller;
/* Don't re-enter on this CPU, unless it was an OPAL re-entry */
if (this_cpu()->in_opal_call == 1 && this_cpu()->in_poller) {
/**
* @fwts-label OPALPollerRecursion
* @fwts-advice Recursion detected in opal_run_pollers(). This
* indicates a bug in OPAL where a poller ended up running
* pollers, which doesn't lead anywhere good.
*/
poller_recursion++;
if (poller_recursion <= 16) {
disable_fast_reboot("Poller recursion detected.");
prlog(PR_ERR, "OPAL: Poller recursion detected.\n");
backtrace();
}
if (poller_recursion == 16)
prlog(PR_ERR, "OPAL: Squashing future poller recursion warnings (>16).\n");
return;
}
was_in_poller = this_cpu()->in_poller;
this_cpu()->in_poller = true;
if (!list_empty(&this_cpu()->locks_held) && pollers_with_lock_warnings < 64) {
/**
* @fwts-label OPALPollerWithLock
* @fwts-advice opal_run_pollers() was called with a lock
* held, which could lead to deadlock if not excessively
* lucky/careful.
*/
prlog(PR_ERR, "Running pollers with lock held !\n");
dump_locks_list();
backtrace();
pollers_with_lock_warnings++;
if (pollers_with_lock_warnings == 64) {
/**
* @fwts-label OPALPollerWithLock64
* @fwts-advice Your firmware is buggy, see the 64
* messages complaining about opal_run_pollers with
* lock held.
*/
prlog(PR_ERR, "opal_run_pollers with lock run 64 "
"times, disabling warning.\n");
}
}
/* We run the timers first */
check_timers(false);
/* The pollers are run lokelessly, see comment in opal_del_poller */
list_for_each(&opal_pollers, poll_ent, link)
poll_ent->poller(poll_ent->data);
/* Disable poller flag */
this_cpu()->in_poller = was_in_poller;
/* On debug builds, print max stack usage */
check_stacks();
}
static int64_t opal_poll_events(__be64 *outstanding_event_mask)
{
if (!opal_addr_valid(outstanding_event_mask))
return OPAL_PARAMETER;
/* Check if we need to trigger an attn for test use */
if (attn_trigger == 0xdeadbeef) {
prlog(PR_EMERG, "Triggering attn\n");
assert(false);
}
/* Test the host initiated reset */
if (hir_trigger == 0xdeadbeef) {
uint32_t plid = log_simple_error(&e_info(OPAL_INJECTED_HIR),
"SURV: Injected HIR, initiating FSP R/R\n");
fsp_trigger_reset(plid);
hir_trigger = 0;
}
opal_run_pollers();
if (outstanding_event_mask)
*outstanding_event_mask = cpu_to_be64(opal_pending_events);
return OPAL_SUCCESS;
}
opal_call(OPAL_POLL_EVENTS, opal_poll_events, 1);
static int64_t opal_check_token(uint64_t token)
{
if (token > OPAL_LAST)
return OPAL_TOKEN_ABSENT;
if (opal_branch_table[token])
return OPAL_TOKEN_PRESENT;
return OPAL_TOKEN_ABSENT;
}
opal_call(OPAL_CHECK_TOKEN, opal_check_token, 1);
struct opal_sync_entry {
struct list_node link;
bool (*notify)(void *data);
void *data;
};
static struct list_head opal_syncers = LIST_HEAD_INIT(opal_syncers);
void opal_add_host_sync_notifier(bool (*notify)(void *data), void *data)
{
struct opal_sync_entry *ent;
ent = zalloc(sizeof(struct opal_sync_entry));
assert(ent);
ent->notify = notify;
ent->data = data;
list_add_tail(&opal_syncers, &ent->link);
}
void opal_del_host_sync_notifier(bool (*notify)(void *data))
{
struct opal_sync_entry *ent;
list_for_each(&opal_syncers, ent, link) {
if (ent->notify == notify) {
list_del(&ent->link);
free(ent);
return;
}
}
}
/*
* OPAL call to handle host kexec'ing scenario
*/
static int64_t opal_sync_host_reboot(void)
{
struct opal_sync_entry *ent;
bool ret = true;
list_for_each(&opal_syncers, ent, link)
ret &= ent->notify(ent->data);
if (ret)
return OPAL_SUCCESS;
else
return OPAL_BUSY_EVENT;
}
opal_call(OPAL_SYNC_HOST_REBOOT, opal_sync_host_reboot, 0);
|