summaryrefslogtreecommitdiff
path: root/hw/ppc/spapr_rtas.c
blob: dc058e512b86952752b8023ad1fbfbc08db2b8db (plain)
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
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
/*
 * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
 *
 * Hypercall based emulated RTAS
 *
 * Copyright (c) 2010-2011 David Gibson, IBM Corporation.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 */
#include "qemu/osdep.h"
#include "cpu.h"
#include "qemu/log.h"
#include "sysemu/sysemu.h"
#include "sysemu/char.h"
#include "hw/qdev.h"
#include "sysemu/device_tree.h"
#include "sysemu/cpus.h"
#include "sysemu/kvm.h"

#include "hw/ppc/spapr.h"
#include "hw/ppc/spapr_vio.h"
#include "hw/ppc/ppc.h"
#include "qapi-event.h"
#include "hw/boards.h"

#include <libfdt.h>
#include "hw/ppc/spapr_drc.h"
#include "qemu/cutils.h"

/* #define DEBUG_SPAPR */

#ifdef DEBUG_SPAPR
#define DPRINTF(fmt, ...) \
    do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
#else
#define DPRINTF(fmt, ...) \
    do { } while (0)
#endif

static sPAPRConfigureConnectorState *spapr_ccs_find(sPAPRMachineState *spapr,
                                                    uint32_t drc_index)
{
    sPAPRConfigureConnectorState *ccs = NULL;

    QTAILQ_FOREACH(ccs, &spapr->ccs_list, next) {
        if (ccs->drc_index == drc_index) {
            break;
        }
    }

    return ccs;
}

static void spapr_ccs_add(sPAPRMachineState *spapr,
                          sPAPRConfigureConnectorState *ccs)
{
    g_assert(!spapr_ccs_find(spapr, ccs->drc_index));
    QTAILQ_INSERT_HEAD(&spapr->ccs_list, ccs, next);
}

static void spapr_ccs_remove(sPAPRMachineState *spapr,
                             sPAPRConfigureConnectorState *ccs)
{
    QTAILQ_REMOVE(&spapr->ccs_list, ccs, next);
    g_free(ccs);
}

void spapr_ccs_reset_hook(void *opaque)
{
    sPAPRMachineState *spapr = opaque;
    sPAPRConfigureConnectorState *ccs, *ccs_tmp;

    QTAILQ_FOREACH_SAFE(ccs, &spapr->ccs_list, next, ccs_tmp) {
        spapr_ccs_remove(spapr, ccs);
    }
}

static void rtas_display_character(PowerPCCPU *cpu, sPAPRMachineState *spapr,
                                   uint32_t token, uint32_t nargs,
                                   target_ulong args,
                                   uint32_t nret, target_ulong rets)
{
    uint8_t c = rtas_ld(args, 0);
    VIOsPAPRDevice *sdev = vty_lookup(spapr, 0);

    if (!sdev) {
        rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
    } else {
        vty_putchars(sdev, &c, sizeof(c));
        rtas_st(rets, 0, RTAS_OUT_SUCCESS);
    }
}

static void rtas_power_off(PowerPCCPU *cpu, sPAPRMachineState *spapr,
                           uint32_t token, uint32_t nargs, target_ulong args,
                           uint32_t nret, target_ulong rets)
{
    if (nargs != 2 || nret != 1) {
        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
        return;
    }
    qemu_system_shutdown_request();
    cpu_stop_current();
    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
}

static void rtas_system_reboot(PowerPCCPU *cpu, sPAPRMachineState *spapr,
                               uint32_t token, uint32_t nargs,
                               target_ulong args,
                               uint32_t nret, target_ulong rets)
{
    if (nargs != 0 || nret != 1) {
        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
        return;
    }
    qemu_system_reset_request();
    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
}

static void rtas_query_cpu_stopped_state(PowerPCCPU *cpu_,
                                         sPAPRMachineState *spapr,
                                         uint32_t token, uint32_t nargs,
                                         target_ulong args,
                                         uint32_t nret, target_ulong rets)
{
    target_ulong id;
    PowerPCCPU *cpu;

    if (nargs != 1 || nret != 2) {
        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
        return;
    }

    id = rtas_ld(args, 0);
    cpu = ppc_get_vcpu_by_dt_id(id);
    if (cpu != NULL) {
        if (CPU(cpu)->halted) {
            rtas_st(rets, 1, 0);
        } else {
            rtas_st(rets, 1, 2);
        }

        rtas_st(rets, 0, RTAS_OUT_SUCCESS);
        return;
    }

    /* Didn't find a matching cpu */
    rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
}

/*
 * Set the timebase offset of the CPU to that of first CPU.
 * This helps hotplugged CPU to have the correct timebase offset.
 */
static void spapr_cpu_update_tb_offset(PowerPCCPU *cpu)
{
    PowerPCCPU *fcpu = POWERPC_CPU(first_cpu);

    cpu->env.tb_env->tb_offset = fcpu->env.tb_env->tb_offset;
}

static void spapr_cpu_set_endianness(PowerPCCPU *cpu)
{
    PowerPCCPU *fcpu = POWERPC_CPU(first_cpu);
    PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(fcpu);

    if (!pcc->interrupts_big_endian(fcpu)) {
        cpu->env.spr[SPR_LPCR] |= LPCR_ILE;
    }
}

static void rtas_start_cpu(PowerPCCPU *cpu_, sPAPRMachineState *spapr,
                           uint32_t token, uint32_t nargs,
                           target_ulong args,
                           uint32_t nret, target_ulong rets)
{
    target_ulong id, start, r3;
    PowerPCCPU *cpu;

    if (nargs != 3 || nret != 1) {
        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
        return;
    }

    id = rtas_ld(args, 0);
    start = rtas_ld(args, 1);
    r3 = rtas_ld(args, 2);

    cpu = ppc_get_vcpu_by_dt_id(id);
    if (cpu != NULL) {
        CPUState *cs = CPU(cpu);
        CPUPPCState *env = &cpu->env;

        if (!cs->halted) {
            rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
            return;
        }

        /* This will make sure qemu state is up to date with kvm, and
         * mark it dirty so our changes get flushed back before the
         * new cpu enters */
        kvm_cpu_synchronize_state(cs);

        env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME);
        env->nip = start;
        env->gpr[3] = r3;
        cs->halted = 0;
        spapr_cpu_set_endianness(cpu);
        spapr_cpu_update_tb_offset(cpu);

        qemu_cpu_kick(cs);

        rtas_st(rets, 0, RTAS_OUT_SUCCESS);
        return;
    }

    /* Didn't find a matching cpu */
    rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
}

static void rtas_stop_self(PowerPCCPU *cpu, sPAPRMachineState *spapr,
                           uint32_t token, uint32_t nargs,
                           target_ulong args,
                           uint32_t nret, target_ulong rets)
{
    CPUState *cs = CPU(cpu);
    CPUPPCState *env = &cpu->env;

    cs->halted = 1;
    qemu_cpu_kick(cs);
    /*
     * While stopping a CPU, the guest calls H_CPPR which
     * effectively disables interrupts on XICS level.
     * However decrementer interrupts in TCG can still
     * wake the CPU up so here we disable interrupts in MSR
     * as well.
     * As rtas_start_cpu() resets the whole MSR anyway, there is
     * no need to bother with specific bits, we just clear it.
     */
    env->msr = 0;
}

static inline int sysparm_st(target_ulong addr, target_ulong len,
                             const void *val, uint16_t vallen)
{
    hwaddr phys = ppc64_phys_to_real(addr);

    if (len < 2) {
        return RTAS_OUT_SYSPARM_PARAM_ERROR;
    }
    stw_be_phys(&address_space_memory, phys, vallen);
    cpu_physical_memory_write(phys + 2, val, MIN(len - 2, vallen));
    return RTAS_OUT_SUCCESS;
}

static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu,
                                          sPAPRMachineState *spapr,
                                          uint32_t token, uint32_t nargs,
                                          target_ulong args,
                                          uint32_t nret, target_ulong rets)
{
    target_ulong parameter = rtas_ld(args, 0);
    target_ulong buffer = rtas_ld(args, 1);
    target_ulong length = rtas_ld(args, 2);
    target_ulong ret;

    switch (parameter) {
    case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS: {
        char *param_val = g_strdup_printf("MaxEntCap=%d,"
                                          "DesMem=%llu,"
                                          "DesProcs=%d,"
                                          "MaxPlatProcs=%d",
                                          max_cpus,
                                          current_machine->ram_size / M_BYTE,
                                          smp_cpus,
                                          max_cpus);
        ret = sysparm_st(buffer, length, param_val, strlen(param_val) + 1);
        g_free(param_val);
        break;
    }
    case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE: {
        uint8_t param_val = DIAGNOSTICS_RUN_MODE_DISABLED;

        ret = sysparm_st(buffer, length, &param_val, sizeof(param_val));
        break;
    }
    case RTAS_SYSPARM_UUID:
        ret = sysparm_st(buffer, length, qemu_uuid, (qemu_uuid_set ? 16 : 0));
        break;
    default:
        ret = RTAS_OUT_NOT_SUPPORTED;
    }

    rtas_st(rets, 0, ret);
}

static void rtas_ibm_set_system_parameter(PowerPCCPU *cpu,
                                          sPAPRMachineState *spapr,
                                          uint32_t token, uint32_t nargs,
                                          target_ulong args,
                                          uint32_t nret, target_ulong rets)
{
    target_ulong parameter = rtas_ld(args, 0);
    target_ulong ret = RTAS_OUT_NOT_SUPPORTED;

    switch (parameter) {
    case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS:
    case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE:
    case RTAS_SYSPARM_UUID:
        ret = RTAS_OUT_NOT_AUTHORIZED;
        break;
    }

    rtas_st(rets, 0, ret);
}

static void rtas_ibm_os_term(PowerPCCPU *cpu,
                            sPAPRMachineState *spapr,
                            uint32_t token, uint32_t nargs,
                            target_ulong args,
                            uint32_t nret, target_ulong rets)
{
    target_ulong ret = 0;

    qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_PAUSE, &error_abort);

    rtas_st(rets, 0, ret);
}

static void rtas_set_power_level(PowerPCCPU *cpu, sPAPRMachineState *spapr,
                                 uint32_t token, uint32_t nargs,
                                 target_ulong args, uint32_t nret,
                                 target_ulong rets)
{
    int32_t power_domain;

    if (nargs != 2 || nret != 2) {
        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
        return;
    }

    /* we currently only use a single, "live insert" powerdomain for
     * hotplugged/dlpar'd resources, so the power is always live/full (100)
     */
    power_domain = rtas_ld(args, 0);
    if (power_domain != -1) {
        rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
        return;
    }

    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
    rtas_st(rets, 1, 100);
}

static void rtas_get_power_level(PowerPCCPU *cpu, sPAPRMachineState *spapr,
                                  uint32_t token, uint32_t nargs,
                                  target_ulong args, uint32_t nret,
                                  target_ulong rets)
{
    int32_t power_domain;

    if (nargs != 1 || nret != 2) {
        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
        return;
    }

    /* we currently only use a single, "live insert" powerdomain for
     * hotplugged/dlpar'd resources, so the power is always live/full (100)
     */
    power_domain = rtas_ld(args, 0);
    if (power_domain != -1) {
        rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
        return;
    }

    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
    rtas_st(rets, 1, 100);
}

static bool sensor_type_is_dr(uint32_t sensor_type)
{
    switch (sensor_type) {
    case RTAS_SENSOR_TYPE_ISOLATION_STATE:
    case RTAS_SENSOR_TYPE_DR:
    case RTAS_SENSOR_TYPE_ALLOCATION_STATE:
        return true;
    }

    return false;
}

static void rtas_set_indicator(PowerPCCPU *cpu, sPAPRMachineState *spapr,
                               uint32_t token, uint32_t nargs,
                               target_ulong args, uint32_t nret,
                               target_ulong rets)
{
    uint32_t sensor_type;
    uint32_t sensor_index;
    uint32_t sensor_state;
    uint32_t ret = RTAS_OUT_SUCCESS;
    sPAPRDRConnector *drc;
    sPAPRDRConnectorClass *drck;

    if (nargs != 3 || nret != 1) {
        ret = RTAS_OUT_PARAM_ERROR;
        goto out;
    }

    sensor_type = rtas_ld(args, 0);
    sensor_index = rtas_ld(args, 1);
    sensor_state = rtas_ld(args, 2);

    if (!sensor_type_is_dr(sensor_type)) {
        goto out_unimplemented;
    }

    /* if this is a DR sensor we can assume sensor_index == drc_index */
    drc = spapr_dr_connector_by_index(sensor_index);
    if (!drc) {
        DPRINTF("rtas_set_indicator: invalid sensor/DRC index: %xh\n",
                sensor_index);
        ret = RTAS_OUT_PARAM_ERROR;
        goto out;
    }
    drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);

    switch (sensor_type) {
    case RTAS_SENSOR_TYPE_ISOLATION_STATE:
        /* if the guest is configuring a device attached to this
         * DRC, we should reset the configuration state at this
         * point since it may no longer be reliable (guest released
         * device and needs to start over, or unplug occurred so
         * the FDT is no longer valid)
         */
        if (sensor_state == SPAPR_DR_ISOLATION_STATE_ISOLATED) {
            sPAPRConfigureConnectorState *ccs = spapr_ccs_find(spapr,
                                                               sensor_index);
            if (ccs) {
                spapr_ccs_remove(spapr, ccs);
            }
        }
        ret = drck->set_isolation_state(drc, sensor_state);
        break;
    case RTAS_SENSOR_TYPE_DR:
        ret = drck->set_indicator_state(drc, sensor_state);
        break;
    case RTAS_SENSOR_TYPE_ALLOCATION_STATE:
        ret = drck->set_allocation_state(drc, sensor_state);
        break;
    default:
        goto out_unimplemented;
    }

out:
    rtas_st(rets, 0, ret);
    return;

out_unimplemented:
    /* currently only DR-related sensors are implemented */
    DPRINTF("rtas_set_indicator: sensor/indicator not implemented: %d\n",
            sensor_type);
    rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
}

static void rtas_get_sensor_state(PowerPCCPU *cpu, sPAPRMachineState *spapr,
                                  uint32_t token, uint32_t nargs,
                                  target_ulong args, uint32_t nret,
                                  target_ulong rets)
{
    uint32_t sensor_type;
    uint32_t sensor_index;
    uint32_t sensor_state = 0;
    sPAPRDRConnector *drc;
    sPAPRDRConnectorClass *drck;
    uint32_t ret = RTAS_OUT_SUCCESS;

    if (nargs != 2 || nret != 2) {
        ret = RTAS_OUT_PARAM_ERROR;
        goto out;
    }

    sensor_type = rtas_ld(args, 0);
    sensor_index = rtas_ld(args, 1);

    if (sensor_type != RTAS_SENSOR_TYPE_ENTITY_SENSE) {
        /* currently only DR-related sensors are implemented */
        DPRINTF("rtas_get_sensor_state: sensor/indicator not implemented: %d\n",
                sensor_type);
        ret = RTAS_OUT_NOT_SUPPORTED;
        goto out;
    }

    drc = spapr_dr_connector_by_index(sensor_index);
    if (!drc) {
        DPRINTF("rtas_get_sensor_state: invalid sensor/DRC index: %xh\n",
                sensor_index);
        ret = RTAS_OUT_PARAM_ERROR;
        goto out;
    }
    drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
    ret = drck->entity_sense(drc, &sensor_state);

out:
    rtas_st(rets, 0, ret);
    rtas_st(rets, 1, sensor_state);
}

/* configure-connector work area offsets, int32_t units for field
 * indexes, bytes for field offset/len values.
 *
 * as documented by PAPR+ v2.7, 13.5.3.5
 */
#define CC_IDX_NODE_NAME_OFFSET 2
#define CC_IDX_PROP_NAME_OFFSET 2
#define CC_IDX_PROP_LEN 3
#define CC_IDX_PROP_DATA_OFFSET 4
#define CC_VAL_DATA_OFFSET ((CC_IDX_PROP_DATA_OFFSET + 1) * 4)
#define CC_WA_LEN 4096

static void configure_connector_st(target_ulong addr, target_ulong offset,
                                   const void *buf, size_t len)
{
    cpu_physical_memory_write(ppc64_phys_to_real(addr + offset),
                              buf, MIN(len, CC_WA_LEN - offset));
}

static void rtas_ibm_configure_connector(PowerPCCPU *cpu,
                                         sPAPRMachineState *spapr,
                                         uint32_t token, uint32_t nargs,
                                         target_ulong args, uint32_t nret,
                                         target_ulong rets)
{
    uint64_t wa_addr;
    uint64_t wa_offset;
    uint32_t drc_index;
    sPAPRDRConnector *drc;
    sPAPRDRConnectorClass *drck;
    sPAPRConfigureConnectorState *ccs;
    sPAPRDRCCResponse resp = SPAPR_DR_CC_RESPONSE_CONTINUE;
    int rc;
    const void *fdt;

    if (nargs != 2 || nret != 1) {
        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
        return;
    }

    wa_addr = ((uint64_t)rtas_ld(args, 1) << 32) | rtas_ld(args, 0);

    drc_index = rtas_ld(wa_addr, 0);
    drc = spapr_dr_connector_by_index(drc_index);
    if (!drc) {
        DPRINTF("rtas_ibm_configure_connector: invalid DRC index: %xh\n",
                drc_index);
        rc = RTAS_OUT_PARAM_ERROR;
        goto out;
    }

    drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
    fdt = drck->get_fdt(drc, NULL);
    if (!fdt) {
        DPRINTF("rtas_ibm_configure_connector: Missing FDT for DRC index: %xh\n",
                drc_index);
        rc = SPAPR_DR_CC_RESPONSE_NOT_CONFIGURABLE;
        goto out;
    }

    ccs = spapr_ccs_find(spapr, drc_index);
    if (!ccs) {
        ccs = g_new0(sPAPRConfigureConnectorState, 1);
        (void)drck->get_fdt(drc, &ccs->fdt_offset);
        ccs->drc_index = drc_index;
        spapr_ccs_add(spapr, ccs);
    }

    do {
        uint32_t tag;
        const char *name;
        const struct fdt_property *prop;
        int fdt_offset_next, prop_len;

        tag = fdt_next_tag(fdt, ccs->fdt_offset, &fdt_offset_next);

        switch (tag) {
        case FDT_BEGIN_NODE:
            ccs->fdt_depth++;
            name = fdt_get_name(fdt, ccs->fdt_offset, NULL);

            /* provide the name of the next OF node */
            wa_offset = CC_VAL_DATA_OFFSET;
            rtas_st(wa_addr, CC_IDX_NODE_NAME_OFFSET, wa_offset);
            configure_connector_st(wa_addr, wa_offset, name, strlen(name) + 1);
            resp = SPAPR_DR_CC_RESPONSE_NEXT_CHILD;
            break;
        case FDT_END_NODE:
            ccs->fdt_depth--;
            if (ccs->fdt_depth == 0) {
                /* done sending the device tree, don't need to track
                 * the state anymore
                 */
                drck->set_configured(drc);
                spapr_ccs_remove(spapr, ccs);
                ccs = NULL;
                resp = SPAPR_DR_CC_RESPONSE_SUCCESS;
            } else {
                resp = SPAPR_DR_CC_RESPONSE_PREV_PARENT;
            }
            break;
        case FDT_PROP:
            prop = fdt_get_property_by_offset(fdt, ccs->fdt_offset,
                                              &prop_len);
            name = fdt_string(fdt, fdt32_to_cpu(prop->nameoff));

            /* provide the name of the next OF property */
            wa_offset = CC_VAL_DATA_OFFSET;
            rtas_st(wa_addr, CC_IDX_PROP_NAME_OFFSET, wa_offset);
            configure_connector_st(wa_addr, wa_offset, name, strlen(name) + 1);

            /* provide the length and value of the OF property. data gets
             * placed immediately after NULL terminator of the OF property's
             * name string
             */
            wa_offset += strlen(name) + 1,
            rtas_st(wa_addr, CC_IDX_PROP_LEN, prop_len);
            rtas_st(wa_addr, CC_IDX_PROP_DATA_OFFSET, wa_offset);
            configure_connector_st(wa_addr, wa_offset, prop->data, prop_len);
            resp = SPAPR_DR_CC_RESPONSE_NEXT_PROPERTY;
            break;
        case FDT_END:
            resp = SPAPR_DR_CC_RESPONSE_ERROR;
        default:
            /* keep seeking for an actionable tag */
            break;
        }
        if (ccs) {
            ccs->fdt_offset = fdt_offset_next;
        }
    } while (resp == SPAPR_DR_CC_RESPONSE_CONTINUE);

    rc = resp;
out:
    rtas_st(rets, 0, rc);
}

static struct rtas_call {
    const char *name;
    spapr_rtas_fn fn;
} rtas_table[RTAS_TOKEN_MAX - RTAS_TOKEN_BASE];

target_ulong spapr_rtas_call(PowerPCCPU *cpu, sPAPRMachineState *spapr,
                             uint32_t token, uint32_t nargs, target_ulong args,
                             uint32_t nret, target_ulong rets)
{
    if ((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX)) {
        struct rtas_call *call = rtas_table + (token - RTAS_TOKEN_BASE);

        if (call->fn) {
            call->fn(cpu, spapr, token, nargs, args, nret, rets);
            return H_SUCCESS;
        }
    }

    /* HACK: Some Linux early debug code uses RTAS display-character,
     * but assumes the token value is 0xa (which it is on some real
     * machines) without looking it up in the device tree.  This
     * special case makes this work */
    if (token == 0xa) {
        rtas_display_character(cpu, spapr, 0xa, nargs, args, nret, rets);
        return H_SUCCESS;
    }

    hcall_dprintf("Unknown RTAS token 0x%x\n", token);
    rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
    return H_PARAMETER;
}

void spapr_rtas_register(int token, const char *name, spapr_rtas_fn fn)
{
    assert((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX));

    token -= RTAS_TOKEN_BASE;

    assert(!rtas_table[token].name);

    rtas_table[token].name = name;
    rtas_table[token].fn = fn;
}

int spapr_rtas_device_tree_setup(void *fdt, hwaddr rtas_addr,
                                 hwaddr rtas_size)
{
    int ret;
    int i;
    uint32_t lrdr_capacity[5];
    MachineState *machine = MACHINE(qdev_get_machine());
    sPAPRMachineState *spapr = SPAPR_MACHINE(machine);
    uint64_t max_hotplug_addr = spapr->hotplug_memory.base +
                                memory_region_size(&spapr->hotplug_memory.mr);

    ret = fdt_add_mem_rsv(fdt, rtas_addr, rtas_size);
    if (ret < 0) {
        fprintf(stderr, "Couldn't add RTAS reserve entry: %s\n",
                fdt_strerror(ret));
        return ret;
    }

    ret = qemu_fdt_setprop_cell(fdt, "/rtas", "linux,rtas-base",
                                rtas_addr);
    if (ret < 0) {
        fprintf(stderr, "Couldn't add linux,rtas-base property: %s\n",
                fdt_strerror(ret));
        return ret;
    }

    ret = qemu_fdt_setprop_cell(fdt, "/rtas", "linux,rtas-entry",
                                rtas_addr);
    if (ret < 0) {
        fprintf(stderr, "Couldn't add linux,rtas-entry property: %s\n",
                fdt_strerror(ret));
        return ret;
    }

    ret = qemu_fdt_setprop_cell(fdt, "/rtas", "rtas-size",
                                rtas_size);
    if (ret < 0) {
        fprintf(stderr, "Couldn't add rtas-size property: %s\n",
                fdt_strerror(ret));
        return ret;
    }

    for (i = 0; i < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; i++) {
        struct rtas_call *call = &rtas_table[i];

        if (!call->name) {
            continue;
        }

        ret = qemu_fdt_setprop_cell(fdt, "/rtas", call->name,
                                    i + RTAS_TOKEN_BASE);
        if (ret < 0) {
            fprintf(stderr, "Couldn't add rtas token for %s: %s\n",
                    call->name, fdt_strerror(ret));
            return ret;
        }

    }

    lrdr_capacity[0] = cpu_to_be32(max_hotplug_addr >> 32);
    lrdr_capacity[1] = cpu_to_be32(max_hotplug_addr & 0xffffffff);
    lrdr_capacity[2] = 0;
    lrdr_capacity[3] = cpu_to_be32(SPAPR_MEMORY_BLOCK_SIZE);
    lrdr_capacity[4] = cpu_to_be32(max_cpus/smp_threads);
    ret = qemu_fdt_setprop(fdt, "/rtas", "ibm,lrdr-capacity", lrdr_capacity,
                     sizeof(lrdr_capacity));
    if (ret < 0) {
        fprintf(stderr, "Couldn't add ibm,lrdr-capacity rtas property\n");
        return ret;
    }

    return 0;
}

static void core_rtas_register_types(void)
{
    spapr_rtas_register(RTAS_DISPLAY_CHARACTER, "display-character",
                        rtas_display_character);
    spapr_rtas_register(RTAS_POWER_OFF, "power-off", rtas_power_off);
    spapr_rtas_register(RTAS_SYSTEM_REBOOT, "system-reboot",
                        rtas_system_reboot);
    spapr_rtas_register(RTAS_QUERY_CPU_STOPPED_STATE, "query-cpu-stopped-state",
                        rtas_query_cpu_stopped_state);
    spapr_rtas_register(RTAS_START_CPU, "start-cpu", rtas_start_cpu);
    spapr_rtas_register(RTAS_STOP_SELF, "stop-self", rtas_stop_self);
    spapr_rtas_register(RTAS_IBM_GET_SYSTEM_PARAMETER,
                        "ibm,get-system-parameter",
                        rtas_ibm_get_system_parameter);
    spapr_rtas_register(RTAS_IBM_SET_SYSTEM_PARAMETER,
                        "ibm,set-system-parameter",
                        rtas_ibm_set_system_parameter);
    spapr_rtas_register(RTAS_IBM_OS_TERM, "ibm,os-term",
                        rtas_ibm_os_term);
    spapr_rtas_register(RTAS_SET_POWER_LEVEL, "set-power-level",
                        rtas_set_power_level);
    spapr_rtas_register(RTAS_GET_POWER_LEVEL, "get-power-level",
                        rtas_get_power_level);
    spapr_rtas_register(RTAS_SET_INDICATOR, "set-indicator",
                        rtas_set_indicator);
    spapr_rtas_register(RTAS_GET_SENSOR_STATE, "get-sensor-state",
                        rtas_get_sensor_state);
    spapr_rtas_register(RTAS_IBM_CONFIGURE_CONNECTOR, "ibm,configure-connector",
                        rtas_ibm_configure_connector);
}

type_init(core_rtas_register_types)