qemu

1
/*
2
 * virtio ccw target implementation
3
 *
4
 * Copyright 2012,2015 IBM Corp.
5
 * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
6
 *            Pierre Morel <pmorel@linux.vnet.ibm.com>
7
 *
8
 * This work is licensed under the terms of the GNU GPL, version 2 or (at
9
 * your option) any later version. See the COPYING file in the top-level
10
 * directory.
11
 */
12

13
#include "qemu/osdep.h"
14
#include "qapi/error.h"
15
#include "exec/address-spaces.h"
16
#include "sysemu/kvm.h"
17
#include "net/net.h"
18
#include "hw/virtio/virtio.h"
19
#include "migration/qemu-file-types.h"
20
#include "hw/virtio/virtio-net.h"
21
#include "qemu/bitops.h"
22
#include "qemu/error-report.h"
23
#include "qemu/log.h"
24
#include "qemu/module.h"
25
#include "hw/virtio/virtio-bus.h"
26
#include "hw/s390x/adapter.h"
27
#include "hw/s390x/s390_flic.h"
28

29
#include "hw/s390x/ioinst.h"
30
#include "hw/s390x/css.h"
31
#include "virtio-ccw.h"
32
#include "trace.h"
33
#include "hw/s390x/css-bridge.h"
34
#include "hw/s390x/s390-virtio-ccw.h"
35
#include "sysemu/replay.h"
36

37
#define NR_CLASSIC_INDICATOR_BITS 64
38

39
bool have_virtio_ccw = true;
40

41
static int virtio_ccw_dev_post_load(void *opaque, int version_id)
42
{
43
    VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(opaque);
44
    CcwDevice *ccw_dev = CCW_DEVICE(dev);
45
    CCWDeviceClass *ck = CCW_DEVICE_GET_CLASS(ccw_dev);
46

47
    ccw_dev->sch->driver_data = dev;
48
    if (ccw_dev->sch->thinint_active) {
49
        dev->routes.adapter.adapter_id = css_get_adapter_id(
50
                                         CSS_IO_ADAPTER_VIRTIO,
51
                                         dev->thinint_isc);
52
    }
53
    /* Re-fill subch_id after loading the subchannel states.*/
54
    if (ck->refill_ids) {
55
        ck->refill_ids(ccw_dev);
56
    }
57
    return 0;
58
}
59

60
typedef struct VirtioCcwDeviceTmp {
61
    VirtioCcwDevice *parent;
62
    uint16_t config_vector;
63
} VirtioCcwDeviceTmp;
64

65
static int virtio_ccw_dev_tmp_pre_save(void *opaque)
66
{
67
    VirtioCcwDeviceTmp *tmp = opaque;
68
    VirtioCcwDevice *dev = tmp->parent;
69
    VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
70

71
    tmp->config_vector = vdev->config_vector;
72

73
    return 0;
74
}
75

76
static int virtio_ccw_dev_tmp_post_load(void *opaque, int version_id)
77
{
78
    VirtioCcwDeviceTmp *tmp = opaque;
79
    VirtioCcwDevice *dev = tmp->parent;
80
    VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
81

82
    vdev->config_vector = tmp->config_vector;
83
    return 0;
84
}
85

86
const VMStateDescription vmstate_virtio_ccw_dev_tmp = {
87
    .name = "s390_virtio_ccw_dev_tmp",
88
    .pre_save = virtio_ccw_dev_tmp_pre_save,
89
    .post_load = virtio_ccw_dev_tmp_post_load,
90
    .fields = (const VMStateField[]) {
91
        VMSTATE_UINT16(config_vector, VirtioCcwDeviceTmp),
92
        VMSTATE_END_OF_LIST()
93
    }
94
};
95

96
const VMStateDescription vmstate_virtio_ccw_dev = {
97
    .name = "s390_virtio_ccw_dev",
98
    .version_id = 1,
99
    .minimum_version_id = 1,
100
    .post_load = virtio_ccw_dev_post_load,
101
    .fields = (const VMStateField[]) {
102
        VMSTATE_CCW_DEVICE(parent_obj, VirtioCcwDevice),
103
        VMSTATE_PTR_TO_IND_ADDR(indicators, VirtioCcwDevice),
104
        VMSTATE_PTR_TO_IND_ADDR(indicators2, VirtioCcwDevice),
105
        VMSTATE_PTR_TO_IND_ADDR(summary_indicator, VirtioCcwDevice),
106
        /*
107
         * Ugly hack because VirtIODevice does not migrate itself.
108
         * This also makes legacy via vmstate_save_state possible.
109
         */
110
        VMSTATE_WITH_TMP(VirtioCcwDevice, VirtioCcwDeviceTmp,
111
                         vmstate_virtio_ccw_dev_tmp),
112
        VMSTATE_STRUCT(routes, VirtioCcwDevice, 1, vmstate_adapter_routes,
113
                       AdapterRoutes),
114
        VMSTATE_UINT8(thinint_isc, VirtioCcwDevice),
115
        VMSTATE_INT32(revision, VirtioCcwDevice),
116
        VMSTATE_END_OF_LIST()
117
    }
118
};
119

120
static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size,
121
                               VirtioCcwDevice *dev);
122

123
VirtIODevice *virtio_ccw_get_vdev(SubchDev *sch)
124
{
125
    VirtIODevice *vdev = NULL;
126
    VirtioCcwDevice *dev = sch->driver_data;
127

128
    if (dev) {
129
        vdev = virtio_bus_get_device(&dev->bus);
130
    }
131
    return vdev;
132
}
133

134
static void virtio_ccw_start_ioeventfd(VirtioCcwDevice *dev)
135
{
136
    virtio_bus_start_ioeventfd(&dev->bus);
137
}
138

139
static void virtio_ccw_stop_ioeventfd(VirtioCcwDevice *dev)
140
{
141
    virtio_bus_stop_ioeventfd(&dev->bus);
142
}
143

144
static bool virtio_ccw_ioeventfd_enabled(DeviceState *d)
145
{
146
    VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
147

148
    return (dev->flags & VIRTIO_CCW_FLAG_USE_IOEVENTFD) != 0;
149
}
150

151
static int virtio_ccw_ioeventfd_assign(DeviceState *d, EventNotifier *notifier,
152
                                       int n, bool assign)
153
{
154
    VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
155
    CcwDevice *ccw_dev = CCW_DEVICE(dev);
156
    SubchDev *sch = ccw_dev->sch;
157
    uint32_t sch_id = (css_build_subchannel_id(sch) << 16) | sch->schid;
158

159
    return s390_assign_subch_ioeventfd(notifier, sch_id, n, assign);
160
}
161

162
/* Communication blocks used by several channel commands. */
163
typedef struct VqInfoBlockLegacy {
164
    uint64_t queue;
165
    uint32_t align;
166
    uint16_t index;
167
    uint16_t num;
168
} QEMU_PACKED VqInfoBlockLegacy;
169

170
typedef struct VqInfoBlock {
171
    uint64_t desc;
172
    uint32_t res0;
173
    uint16_t index;
174
    uint16_t num;
175
    uint64_t avail;
176
    uint64_t used;
177
} QEMU_PACKED VqInfoBlock;
178

179
typedef struct VqConfigBlock {
180
    uint16_t index;
181
    uint16_t num_max;
182
} QEMU_PACKED VqConfigBlock;
183

184
typedef struct VirtioFeatDesc {
185
    uint32_t features;
186
    uint8_t index;
187
} QEMU_PACKED VirtioFeatDesc;
188

189
typedef struct VirtioThinintInfo {
190
    hwaddr summary_indicator;
191
    hwaddr device_indicator;
192
    uint64_t ind_bit;
193
    uint8_t isc;
194
} QEMU_PACKED VirtioThinintInfo;
195

196
typedef struct VirtioRevInfo {
197
    uint16_t revision;
198
    uint16_t length;
199
    uint8_t data[];
200
} QEMU_PACKED VirtioRevInfo;
201

202
/* Specify where the virtqueues for the subchannel are in guest memory. */
203
static int virtio_ccw_set_vqs(SubchDev *sch, VqInfoBlock *info,
204
                              VqInfoBlockLegacy *linfo)
205
{
206
    VirtIODevice *vdev = virtio_ccw_get_vdev(sch);
207
    uint16_t index = info ? info->index : linfo->index;
208
    uint16_t num = info ? info->num : linfo->num;
209
    uint64_t desc = info ? info->desc : linfo->queue;
210

211
    if (index >= VIRTIO_QUEUE_MAX) {
212
        return -EINVAL;
213
    }
214

215
    /* Current code in virtio.c relies on 4K alignment. */
216
    if (linfo && desc && (linfo->align != 4096)) {
217
        return -EINVAL;
218
    }
219

220
    if (!vdev) {
221
        return -EINVAL;
222
    }
223

224
    if (info) {
225
        virtio_queue_set_rings(vdev, index, desc, info->avail, info->used);
226
    } else {
227
        virtio_queue_set_addr(vdev, index, desc);
228
    }
229
    if (!desc) {
230
        virtio_queue_set_vector(vdev, index, VIRTIO_NO_VECTOR);
231
    } else {
232
        if (info) {
233
            /* virtio-1 allows changing the ring size. */
234
            if (virtio_queue_get_max_num(vdev, index) < num) {
235
                /* Fail if we exceed the maximum number. */
236
                return -EINVAL;
237
            }
238
            virtio_queue_set_num(vdev, index, num);
239
            virtio_init_region_cache(vdev, index);
240
        } else if (virtio_queue_get_num(vdev, index) > num) {
241
            /* Fail if we don't have a big enough queue. */
242
            return -EINVAL;
243
        }
244
        /* We ignore possible increased num for legacy for compatibility. */
245
        virtio_queue_set_vector(vdev, index, index);
246
    }
247
    /* tell notify handler in case of config change */
248
    vdev->config_vector = VIRTIO_QUEUE_MAX;
249
    return 0;
250
}
251

252
static void virtio_ccw_reset_virtio(VirtioCcwDevice *dev)
253
{
254
    CcwDevice *ccw_dev = CCW_DEVICE(dev);
255

256
    virtio_bus_reset(&dev->bus);
257
    if (dev->indicators) {
258
        release_indicator(&dev->routes.adapter, dev->indicators);
259
        dev->indicators = NULL;
260
    }
261
    if (dev->indicators2) {
262
        release_indicator(&dev->routes.adapter, dev->indicators2);
263
        dev->indicators2 = NULL;
264
    }
265
    if (dev->summary_indicator) {
266
        release_indicator(&dev->routes.adapter, dev->summary_indicator);
267
        dev->summary_indicator = NULL;
268
    }
269
    ccw_dev->sch->thinint_active = false;
270
}
271

272
static int virtio_ccw_handle_set_vq(SubchDev *sch, CCW1 ccw, bool check_len,
273
                                    bool is_legacy)
274
{
275
    int ret;
276
    VqInfoBlock info;
277
    VqInfoBlockLegacy linfo;
278
    size_t info_len = is_legacy ? sizeof(linfo) : sizeof(info);
279

280
    if (check_len) {
281
        if (ccw.count != info_len) {
282
            return -EINVAL;
283
        }
284
    } else if (ccw.count < info_len) {
285
        /* Can't execute command. */
286
        return -EINVAL;
287
    }
288
    if (!ccw.cda) {
289
        return -EFAULT;
290
    }
291
    if (is_legacy) {
292
        ret = ccw_dstream_read(&sch->cds, linfo);
293
        if (ret) {
294
            return ret;
295
        }
296
        linfo.queue = be64_to_cpu(linfo.queue);
297
        linfo.align = be32_to_cpu(linfo.align);
298
        linfo.index = be16_to_cpu(linfo.index);
299
        linfo.num = be16_to_cpu(linfo.num);
300
        ret = virtio_ccw_set_vqs(sch, NULL, &linfo);
301
    } else {
302
        ret = ccw_dstream_read(&sch->cds, info);
303
        if (ret) {
304
            return ret;
305
        }
306
        info.desc = be64_to_cpu(info.desc);
307
        info.index = be16_to_cpu(info.index);
308
        info.num = be16_to_cpu(info.num);
309
        info.avail = be64_to_cpu(info.avail);
310
        info.used = be64_to_cpu(info.used);
311
        ret = virtio_ccw_set_vqs(sch, &info, NULL);
312
    }
313
    sch->curr_status.scsw.count = 0;
314
    return ret;
315
}
316

317
static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
318
{
319
    int ret;
320
    VirtioRevInfo revinfo;
321
    uint8_t status;
322
    VirtioFeatDesc features;
323
    hwaddr indicators;
324
    VqConfigBlock vq_config;
325
    VirtioCcwDevice *dev = sch->driver_data;
326
    VirtIODevice *vdev = virtio_ccw_get_vdev(sch);
327
    bool check_len;
328
    int len;
329
    VirtioThinintInfo thinint;
330

331
    if (!dev) {
332
        return -EINVAL;
333
    }
334

335
    trace_virtio_ccw_interpret_ccw(sch->cssid, sch->ssid, sch->schid,
336
                                   ccw.cmd_code);
337
    check_len = !((ccw.flags & CCW_FLAG_SLI) && !(ccw.flags & CCW_FLAG_DC));
338

339
    if (dev->revision < 0 && ccw.cmd_code != CCW_CMD_SET_VIRTIO_REV) {
340
        if (dev->force_revision_1) {
341
            /*
342
             * virtio-1 drivers must start with negotiating to a revision >= 1,
343
             * so post a command reject for all other commands
344
             */
345
            return -ENOSYS;
346
        } else {
347
            /*
348
             * If the driver issues any command that is not SET_VIRTIO_REV,
349
             * we'll have to operate the device in legacy mode.
350
             */
351
            dev->revision = 0;
352
        }
353
    }
354

355
    /* Look at the command. */
356
    switch (ccw.cmd_code) {
357
    case CCW_CMD_SET_VQ:
358
        ret = virtio_ccw_handle_set_vq(sch, ccw, check_len, dev->revision < 1);
359
        break;
360
    case CCW_CMD_VDEV_RESET:
361
        virtio_ccw_reset_virtio(dev);
362
        ret = 0;
363
        break;
364
    case CCW_CMD_READ_FEAT:
365
        if (check_len) {
366
            if (ccw.count != sizeof(features)) {
367
                ret = -EINVAL;
368
                break;
369
            }
370
        } else if (ccw.count < sizeof(features)) {
371
            /* Can't execute command. */
372
            ret = -EINVAL;
373
            break;
374
        }
375
        if (!ccw.cda) {
376
            ret = -EFAULT;
377
        } else {
378
            VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
379

380
            ccw_dstream_advance(&sch->cds, sizeof(features.features));
381
            ret = ccw_dstream_read(&sch->cds, features.index);
382
            if (ret) {
383
                break;
384
            }
385
            if (features.index == 0) {
386
                if (dev->revision >= 1) {
387
                    /* Don't offer legacy features for modern devices. */
388
                    features.features = (uint32_t)
389
                        (vdev->host_features & ~vdc->legacy_features);
390
                } else {
391
                    features.features = (uint32_t)vdev->host_features;
392
                }
393
            } else if ((features.index == 1) && (dev->revision >= 1)) {
394
                /*
395
                 * Only offer feature bits beyond 31 if the guest has
396
                 * negotiated at least revision 1.
397
                 */
398
                features.features = (uint32_t)(vdev->host_features >> 32);
399
            } else {
400
                /* Return zeroes if the guest supports more feature bits. */
401
                features.features = 0;
402
            }
403
            ccw_dstream_rewind(&sch->cds);
404
            features.features = cpu_to_le32(features.features);
405
            ret = ccw_dstream_write(&sch->cds, features.features);
406
            if (!ret) {
407
                sch->curr_status.scsw.count = ccw.count - sizeof(features);
408
            }
409
        }
410
        break;
411
    case CCW_CMD_WRITE_FEAT:
412
        if (check_len) {
413
            if (ccw.count != sizeof(features)) {
414
                ret = -EINVAL;
415
                break;
416
            }
417
        } else if (ccw.count < sizeof(features)) {
418
            /* Can't execute command. */
419
            ret = -EINVAL;
420
            break;
421
        }
422
        if (!ccw.cda) {
423
            ret = -EFAULT;
424
        } else {
425
            ret = ccw_dstream_read(&sch->cds, features);
426
            if (ret) {
427
                break;
428
            }
429
            features.features = le32_to_cpu(features.features);
430
            if (features.index == 0) {
431
                virtio_set_features(vdev,
432
                                    (vdev->guest_features & 0xffffffff00000000ULL) |
433
                                    features.features);
434
            } else if ((features.index == 1) && (dev->revision >= 1)) {
435
                /*
436
                 * If the guest did not negotiate at least revision 1,
437
                 * we did not offer it any feature bits beyond 31. Such a
438
                 * guest passing us any bit here is therefore buggy.
439
                 */
440
                virtio_set_features(vdev,
441
                                    (vdev->guest_features & 0x00000000ffffffffULL) |
442
                                    ((uint64_t)features.features << 32));
443
            } else {
444
                /*
445
                 * If the guest supports more feature bits, assert that it
446
                 * passes us zeroes for those we don't support.
447
                 */
448
                if (features.features) {
449
                    qemu_log_mask(LOG_GUEST_ERROR,
450
                                  "Guest bug: features[%i]=%x (expected 0)",
451
                                  features.index, features.features);
452
                    /* XXX: do a unit check here? */
453
                }
454
            }
455
            sch->curr_status.scsw.count = ccw.count - sizeof(features);
456
            ret = 0;
457
        }
458
        break;
459
    case CCW_CMD_READ_CONF:
460
        if (check_len) {
461
            if (ccw.count > vdev->config_len) {
462
                ret = -EINVAL;
463
                break;
464
            }
465
        }
466
        len = MIN(ccw.count, vdev->config_len);
467
        if (!ccw.cda) {
468
            ret = -EFAULT;
469
        } else {
470
            virtio_bus_get_vdev_config(&dev->bus, vdev->config);
471
            ret = ccw_dstream_write_buf(&sch->cds, vdev->config, len);
472
            if (ret) {
473
                sch->curr_status.scsw.count = ccw.count - len;
474
            }
475
        }
476
        break;
477
    case CCW_CMD_WRITE_CONF:
478
        if (check_len) {
479
            if (ccw.count > vdev->config_len) {
480
                ret = -EINVAL;
481
                break;
482
            }
483
        }
484
        len = MIN(ccw.count, vdev->config_len);
485
        if (!ccw.cda) {
486
            ret = -EFAULT;
487
        } else {
488
            ret = ccw_dstream_read_buf(&sch->cds, vdev->config, len);
489
            if (!ret) {
490
                virtio_bus_set_vdev_config(&dev->bus, vdev->config);
491
                sch->curr_status.scsw.count = ccw.count - len;
492
            }
493
        }
494
        break;
495
    case CCW_CMD_READ_STATUS:
496
        if (check_len) {
497
            if (ccw.count != sizeof(status)) {
498
                ret = -EINVAL;
499
                break;
500
            }
501
        } else if (ccw.count < sizeof(status)) {
502
            /* Can't execute command. */
503
            ret = -EINVAL;
504
            break;
505
        }
506
        if (!ccw.cda) {
507
            ret = -EFAULT;
508
        } else {
509
            address_space_stb(&address_space_memory, ccw.cda, vdev->status,
510
                                        MEMTXATTRS_UNSPECIFIED, NULL);
511
            sch->curr_status.scsw.count = ccw.count - sizeof(vdev->status);
512
            ret = 0;
513
        }
514
        break;
515
    case CCW_CMD_WRITE_STATUS:
516
        if (check_len) {
517
            if (ccw.count != sizeof(status)) {
518
                ret = -EINVAL;
519
                break;
520
            }
521
        } else if (ccw.count < sizeof(status)) {
522
            /* Can't execute command. */
523
            ret = -EINVAL;
524
            break;
525
        }
526
        if (!ccw.cda) {
527
            ret = -EFAULT;
528
        } else {
529
            ret = ccw_dstream_read(&sch->cds, status);
530
            if (ret) {
531
                break;
532
            }
533
            if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) {
534
                virtio_ccw_stop_ioeventfd(dev);
535
            }
536
            if (virtio_set_status(vdev, status) == 0) {
537
                if (vdev->status == 0) {
538
                    virtio_ccw_reset_virtio(dev);
539
                }
540
                if (status & VIRTIO_CONFIG_S_DRIVER_OK) {
541
                    virtio_ccw_start_ioeventfd(dev);
542
                }
543
                sch->curr_status.scsw.count = ccw.count - sizeof(status);
544
                ret = 0;
545
            } else {
546
                /* Trigger a command reject. */
547
                ret = -ENOSYS;
548
            }
549
        }
550
        break;
551
    case CCW_CMD_SET_IND:
552
        if (check_len) {
553
            if (ccw.count != sizeof(indicators)) {
554
                ret = -EINVAL;
555
                break;
556
            }
557
        } else if (ccw.count < sizeof(indicators)) {
558
            /* Can't execute command. */
559
            ret = -EINVAL;
560
            break;
561
        }
562
        if (sch->thinint_active) {
563
            /* Trigger a command reject. */
564
            ret = -ENOSYS;
565
            break;
566
        }
567
        if (virtio_get_num_queues(vdev) > NR_CLASSIC_INDICATOR_BITS) {
568
            /* More queues than indicator bits --> trigger a reject */
569
            ret = -ENOSYS;
570
            break;
571
        }
572
        if (!ccw.cda) {
573
            ret = -EFAULT;
574
        } else {
575
            ret = ccw_dstream_read(&sch->cds, indicators);
576
            if (ret) {
577
                break;
578
            }
579
            indicators = be64_to_cpu(indicators);
580
            dev->indicators = get_indicator(indicators, sizeof(uint64_t));
581
            sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
582
            ret = 0;
583
        }
584
        break;
585
    case CCW_CMD_SET_CONF_IND:
586
        if (check_len) {
587
            if (ccw.count != sizeof(indicators)) {
588
                ret = -EINVAL;
589
                break;
590
            }
591
        } else if (ccw.count < sizeof(indicators)) {
592
            /* Can't execute command. */
593
            ret = -EINVAL;
594
            break;
595
        }
596
        if (!ccw.cda) {
597
            ret = -EFAULT;
598
        } else {
599
            ret = ccw_dstream_read(&sch->cds, indicators);
600
            if (ret) {
601
                break;
602
            }
603
            indicators = be64_to_cpu(indicators);
604
            dev->indicators2 = get_indicator(indicators, sizeof(uint64_t));
605
            sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
606
            ret = 0;
607
        }
608
        break;
609
    case CCW_CMD_READ_VQ_CONF:
610
        if (check_len) {
611
            if (ccw.count != sizeof(vq_config)) {
612
                ret = -EINVAL;
613
                break;
614
            }
615
        } else if (ccw.count < sizeof(vq_config)) {
616
            /* Can't execute command. */
617
            ret = -EINVAL;
618
            break;
619
        }
620
        if (!ccw.cda) {
621
            ret = -EFAULT;
622
        } else {
623
            ret = ccw_dstream_read(&sch->cds, vq_config.index);
624
            if (ret) {
625
                break;
626
            }
627
            vq_config.index = be16_to_cpu(vq_config.index);
628
            if (vq_config.index >= VIRTIO_QUEUE_MAX) {
629
                ret = -EINVAL;
630
                break;
631
            }
632
            vq_config.num_max = virtio_queue_get_num(vdev,
633
                                                     vq_config.index);
634
            vq_config.num_max = cpu_to_be16(vq_config.num_max);
635
            ret = ccw_dstream_write(&sch->cds, vq_config.num_max);
636
            if (!ret) {
637
                sch->curr_status.scsw.count = ccw.count - sizeof(vq_config);
638
            }
639
        }
640
        break;
641
    case CCW_CMD_SET_IND_ADAPTER:
642
        if (check_len) {
643
            if (ccw.count != sizeof(thinint)) {
644
                ret = -EINVAL;
645
                break;
646
            }
647
        } else if (ccw.count < sizeof(thinint)) {
648
            /* Can't execute command. */
649
            ret = -EINVAL;
650
            break;
651
        }
652
        if (!ccw.cda) {
653
            ret = -EFAULT;
654
        } else if (dev->indicators && !sch->thinint_active) {
655
            /* Trigger a command reject. */
656
            ret = -ENOSYS;
657
        } else {
658
            if (ccw_dstream_read(&sch->cds, thinint)) {
659
                ret = -EFAULT;
660
            } else {
661
                thinint.ind_bit = be64_to_cpu(thinint.ind_bit);
662
                thinint.summary_indicator =
663
                    be64_to_cpu(thinint.summary_indicator);
664
                thinint.device_indicator =
665
                    be64_to_cpu(thinint.device_indicator);
666

667
                dev->summary_indicator =
668
                    get_indicator(thinint.summary_indicator, sizeof(uint8_t));
669
                dev->indicators =
670
                    get_indicator(thinint.device_indicator,
671
                                  thinint.ind_bit / 8 + 1);
672
                dev->thinint_isc = thinint.isc;
673
                dev->routes.adapter.ind_offset = thinint.ind_bit;
674
                dev->routes.adapter.summary_offset = 7;
675
                dev->routes.adapter.adapter_id = css_get_adapter_id(
676
                                                 CSS_IO_ADAPTER_VIRTIO,
677
                                                 dev->thinint_isc);
678
                sch->thinint_active = ((dev->indicators != NULL) &&
679
                                       (dev->summary_indicator != NULL));
680
                sch->curr_status.scsw.count = ccw.count - sizeof(thinint);
681
                ret = 0;
682
            }
683
        }
684
        break;
685
    case CCW_CMD_SET_VIRTIO_REV:
686
        len = sizeof(revinfo);
687
        if (ccw.count < len) {
688
            ret = -EINVAL;
689
            break;
690
        }
691
        if (!ccw.cda) {
692
            ret = -EFAULT;
693
            break;
694
        }
695
        ret = ccw_dstream_read_buf(&sch->cds, &revinfo, 4);
696
        if (ret < 0) {
697
            break;
698
        }
699
        revinfo.revision = be16_to_cpu(revinfo.revision);
700
        revinfo.length = be16_to_cpu(revinfo.length);
701
        if (ccw.count < len + revinfo.length ||
702
            (check_len && ccw.count > len + revinfo.length)) {
703
            ret = -EINVAL;
704
            break;
705
        }
706
        /*
707
         * Once we start to support revisions with additional data, we'll
708
         * need to fetch it here. Nothing to do for now, though.
709
         */
710
        if (dev->revision >= 0 ||
711
            revinfo.revision > virtio_ccw_rev_max(dev) ||
712
            (dev->force_revision_1 && !revinfo.revision)) {
713
            ret = -ENOSYS;
714
            break;
715
        }
716
        ret = 0;
717
        dev->revision = revinfo.revision;
718
        break;
719
    default:
720
        ret = -ENOSYS;
721
        break;
722
    }
723
    return ret;
724
}
725

726
static void virtio_sch_disable_cb(SubchDev *sch)
727
{
728
    VirtioCcwDevice *dev = sch->driver_data;
729

730
    dev->revision = -1;
731
}
732

733
static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp)
734
{
735
    VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
736
    CcwDevice *ccw_dev = CCW_DEVICE(dev);
737
    CCWDeviceClass *ck = CCW_DEVICE_GET_CLASS(ccw_dev);
738
    SubchDev *sch;
739
    Error *err = NULL;
740
    int i;
741

742
    sch = css_create_sch(ccw_dev->devno, errp);
743
    if (!sch) {
744
        return;
745
    }
746
    if (!virtio_ccw_rev_max(dev) && dev->force_revision_1) {
747
        error_setg(&err, "Invalid value of property max_rev "
748
                   "(is %d expected >= 1)", virtio_ccw_rev_max(dev));
749
        goto out_err;
750
    }
751

752
    sch->driver_data = dev;
753
    sch->ccw_cb = virtio_ccw_cb;
754
    sch->disable_cb = virtio_sch_disable_cb;
755
    sch->id.reserved = 0xff;
756
    sch->id.cu_type = VIRTIO_CCW_CU_TYPE;
757
    sch->do_subchannel_work = do_subchannel_work_virtual;
758
    sch->irb_cb = build_irb_virtual;
759
    ccw_dev->sch = sch;
760
    dev->indicators = NULL;
761
    dev->revision = -1;
762
    for (i = 0; i < ADAPTER_ROUTES_MAX_GSI; i++) {
763
        dev->routes.gsi[i] = -1;
764
    }
765
    css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE);
766

767
    trace_virtio_ccw_new_device(
768
        sch->cssid, sch->ssid, sch->schid, sch->devno,
769
        ccw_dev->devno.valid ? "user-configured" : "auto-configured");
770

771
    /* fd-based ioevents can't be synchronized in record/replay */
772
    if (replay_mode != REPLAY_MODE_NONE) {
773
        dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD;
774
    }
775

776
    if (k->realize) {
777
        k->realize(dev, &err);
778
        if (err) {
779
            goto out_err;
780
        }
781
    }
782

783
    ck->realize(ccw_dev, &err);
784
    if (err) {
785
        goto out_err;
786
    }
787

788
    return;
789

790
out_err:
791
    error_propagate(errp, err);
792
    css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
793
    ccw_dev->sch = NULL;
794
    g_free(sch);
795
}
796

797
static void virtio_ccw_device_unrealize(VirtioCcwDevice *dev)
798
{
799
    VirtIOCCWDeviceClass *dc = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
800
    CcwDevice *ccw_dev = CCW_DEVICE(dev);
801
    SubchDev *sch = ccw_dev->sch;
802

803
    if (dc->unrealize) {
804
        dc->unrealize(dev);
805
    }
806

807
    if (sch) {
808
        css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
809
        g_free(sch);
810
        ccw_dev->sch = NULL;
811
    }
812
    if (dev->indicators) {
813
        release_indicator(&dev->routes.adapter, dev->indicators);
814
        dev->indicators = NULL;
815
    }
816
}
817

818
/* DeviceState to VirtioCcwDevice. Note: used on datapath,
819
 * be careful and test performance if you change this.
820
 */
821
static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d)
822
{
823
    CcwDevice *ccw_dev = to_ccw_dev_fast(d);
824

825
    return container_of(ccw_dev, VirtioCcwDevice, parent_obj);
826
}
827

828
static uint8_t virtio_set_ind_atomic(SubchDev *sch, uint64_t ind_loc,
829
                                     uint8_t to_be_set)
830
{
831
    uint8_t expected, actual;
832
    hwaddr len = 1;
833
    /* avoid  multiple fetches */
834
    uint8_t volatile *ind_addr;
835

836
    ind_addr = cpu_physical_memory_map(ind_loc, &len, true);
837
    if (!ind_addr) {
838
        error_report("%s(%x.%x.%04x): unable to access indicator",
839
                     __func__, sch->cssid, sch->ssid, sch->schid);
840
        return -1;
841
    }
842
    actual = *ind_addr;
843
    do {
844
        expected = actual;
845
        actual = qatomic_cmpxchg(ind_addr, expected, expected | to_be_set);
846
    } while (actual != expected);
847
    trace_virtio_ccw_set_ind(ind_loc, actual, actual | to_be_set);
848
    cpu_physical_memory_unmap((void *)ind_addr, len, 1, len);
849

850
    return actual;
851
}
852

853
static void virtio_ccw_notify(DeviceState *d, uint16_t vector)
854
{
855
    VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d);
856
    CcwDevice *ccw_dev = to_ccw_dev_fast(d);
857
    SubchDev *sch = ccw_dev->sch;
858
    uint64_t indicators;
859

860
    if (vector == VIRTIO_NO_VECTOR) {
861
        return;
862
    }
863
    /*
864
     * vector < VIRTIO_QUEUE_MAX: notification for a virtqueue
865
     * vector == VIRTIO_QUEUE_MAX: configuration change notification
866
     * bits beyond that are unused and should never be notified for
867
     */
868
    assert(vector <= VIRTIO_QUEUE_MAX);
869

870
    if (vector < VIRTIO_QUEUE_MAX) {
871
        if (!dev->indicators) {
872
            return;
873
        }
874
        if (sch->thinint_active) {
875
            /*
876
             * In the adapter interrupt case, indicators points to a
877
             * memory area that may be (way) larger than 64 bit and
878
             * ind_bit indicates the start of the indicators in a big
879
             * endian notation.
880
             */
881
            uint64_t ind_bit = dev->routes.adapter.ind_offset;
882

883
            virtio_set_ind_atomic(sch, dev->indicators->addr +
884
                                  (ind_bit + vector) / 8,
885
                                  0x80 >> ((ind_bit + vector) % 8));
886
            if (!virtio_set_ind_atomic(sch, dev->summary_indicator->addr,
887
                                       0x01)) {
888
                css_adapter_interrupt(CSS_IO_ADAPTER_VIRTIO, dev->thinint_isc);
889
            }
890
        } else {
891
            assert(vector < NR_CLASSIC_INDICATOR_BITS);
892
            indicators = address_space_ldq(&address_space_memory,
893
                                           dev->indicators->addr,
894
                                           MEMTXATTRS_UNSPECIFIED,
895
                                           NULL);
896
            indicators |= 1ULL << vector;
897
            address_space_stq(&address_space_memory, dev->indicators->addr,
898
                              indicators, MEMTXATTRS_UNSPECIFIED, NULL);
899
            css_conditional_io_interrupt(sch);
900
        }
901
    } else {
902
        if (!dev->indicators2) {
903
            return;
904
        }
905
        indicators = address_space_ldq(&address_space_memory,
906
                                       dev->indicators2->addr,
907
                                       MEMTXATTRS_UNSPECIFIED,
908
                                       NULL);
909
        indicators |= 1ULL;
910
        address_space_stq(&address_space_memory, dev->indicators2->addr,
911
                          indicators, MEMTXATTRS_UNSPECIFIED, NULL);
912
        css_conditional_io_interrupt(sch);
913
    }
914
}
915

916
static void virtio_ccw_reset(DeviceState *d)
917
{
918
    VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
919
    VirtIOCCWDeviceClass *vdc = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
920

921
    virtio_ccw_reset_virtio(dev);
922
    if (vdc->parent_reset) {
923
        vdc->parent_reset(d);
924
    }
925
}
926

927
static void virtio_ccw_vmstate_change(DeviceState *d, bool running)
928
{
929
    VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
930

931
    if (running) {
932
        virtio_ccw_start_ioeventfd(dev);
933
    } else {
934
        virtio_ccw_stop_ioeventfd(dev);
935
    }
936
}
937

938
static bool virtio_ccw_query_guest_notifiers(DeviceState *d)
939
{
940
    CcwDevice *dev = CCW_DEVICE(d);
941

942
    return !!(dev->sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA);
943
}
944

945
static int virtio_ccw_get_mappings(VirtioCcwDevice *dev)
946
{
947
    int r;
948
    CcwDevice *ccw_dev = CCW_DEVICE(dev);
949

950
    if (!ccw_dev->sch->thinint_active) {
951
        return -EINVAL;
952
    }
953

954
    r = map_indicator(&dev->routes.adapter, dev->summary_indicator);
955
    if (r) {
956
        return r;
957
    }
958
    r = map_indicator(&dev->routes.adapter, dev->indicators);
959
    if (r) {
960
        return r;
961
    }
962
    dev->routes.adapter.summary_addr = dev->summary_indicator->map;
963
    dev->routes.adapter.ind_addr = dev->indicators->map;
964

965
    return 0;
966
}
967

968
static int virtio_ccw_setup_irqroutes(VirtioCcwDevice *dev, int nvqs)
969
{
970
    int i;
971
    VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
972
    int ret;
973
    S390FLICState *fs = s390_get_flic();
974
    S390FLICStateClass *fsc = s390_get_flic_class(fs);
975

976
    ret = virtio_ccw_get_mappings(dev);
977
    if (ret) {
978
        return ret;
979
    }
980
    for (i = 0; i < nvqs; i++) {
981
        if (!virtio_queue_get_num(vdev, i)) {
982
            break;
983
        }
984
    }
985
    dev->routes.num_routes = i;
986
    return fsc->add_adapter_routes(fs, &dev->routes);
987
}
988

989
static void virtio_ccw_release_irqroutes(VirtioCcwDevice *dev, int nvqs)
990
{
991
    S390FLICState *fs = s390_get_flic();
992
    S390FLICStateClass *fsc = s390_get_flic_class(fs);
993

994
    fsc->release_adapter_routes(fs, &dev->routes);
995
}
996

997
static int virtio_ccw_add_irqfd(VirtioCcwDevice *dev, int n)
998
{
999
    VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1000
    VirtQueue *vq = virtio_get_queue(vdev, n);
1001
    EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
1002

1003
    return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, notifier, NULL,
1004
                                              dev->routes.gsi[n]);
1005
}
1006

1007
static void virtio_ccw_remove_irqfd(VirtioCcwDevice *dev, int n)
1008
{
1009
    VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1010
    VirtQueue *vq = virtio_get_queue(vdev, n);
1011
    EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
1012
    int ret;
1013

1014
    ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, notifier,
1015
                                                dev->routes.gsi[n]);
1016
    assert(ret == 0);
1017
}
1018

1019
static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n,
1020
                                         bool assign, bool with_irqfd)
1021
{
1022
    VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1023
    VirtQueue *vq = virtio_get_queue(vdev, n);
1024
    EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
1025
    VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
1026

1027
    if (assign) {
1028
        int r = event_notifier_init(notifier, 0);
1029

1030
        if (r < 0) {
1031
            return r;
1032
        }
1033
        virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
1034
        if (with_irqfd) {
1035
            r = virtio_ccw_add_irqfd(dev, n);
1036
            if (r) {
1037
                virtio_queue_set_guest_notifier_fd_handler(vq, false,
1038
                                                           with_irqfd);
1039
                return r;
1040
            }
1041
        }
1042
        /*
1043
         * We do not support individual masking for channel devices, so we
1044
         * need to manually trigger any guest masking callbacks here.
1045
         */
1046
        if (k->guest_notifier_mask && vdev->use_guest_notifier_mask) {
1047
            k->guest_notifier_mask(vdev, n, false);
1048
        }
1049
        /* get lost events and re-inject */
1050
        if (k->guest_notifier_pending &&
1051
            k->guest_notifier_pending(vdev, n)) {
1052
            event_notifier_set(notifier);
1053
        }
1054
    } else {
1055
        if (k->guest_notifier_mask && vdev->use_guest_notifier_mask) {
1056
            k->guest_notifier_mask(vdev, n, true);
1057
        }
1058
        if (with_irqfd) {
1059
            virtio_ccw_remove_irqfd(dev, n);
1060
        }
1061
        virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
1062
        event_notifier_cleanup(notifier);
1063
    }
1064
    return 0;
1065
}
1066

1067
static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs,
1068
                                          bool assigned)
1069
{
1070
    VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1071
    VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1072
    CcwDevice *ccw_dev = CCW_DEVICE(d);
1073
    bool with_irqfd = ccw_dev->sch->thinint_active && kvm_irqfds_enabled();
1074
    int r, n;
1075

1076
    if (with_irqfd && assigned) {
1077
        /* irq routes need to be set up before assigning irqfds */
1078
        r = virtio_ccw_setup_irqroutes(dev, nvqs);
1079
        if (r < 0) {
1080
            goto irqroute_error;
1081
        }
1082
    }
1083
    for (n = 0; n < nvqs; n++) {
1084
        if (!virtio_queue_get_num(vdev, n)) {
1085
            break;
1086
        }
1087
        r = virtio_ccw_set_guest_notifier(dev, n, assigned, with_irqfd);
1088
        if (r < 0) {
1089
            goto assign_error;
1090
        }
1091
    }
1092
    if (with_irqfd && !assigned) {
1093
        /* release irq routes after irqfds have been released */
1094
        virtio_ccw_release_irqroutes(dev, nvqs);
1095
    }
1096
    return 0;
1097

1098
assign_error:
1099
    while (--n >= 0) {
1100
        virtio_ccw_set_guest_notifier(dev, n, !assigned, false);
1101
    }
1102
irqroute_error:
1103
    if (with_irqfd && assigned) {
1104
        virtio_ccw_release_irqroutes(dev, nvqs);
1105
    }
1106
    return r;
1107
}
1108

1109
static void virtio_ccw_save_queue(DeviceState *d, int n, QEMUFile *f)
1110
{
1111
    VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1112
    VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1113

1114
    qemu_put_be16(f, virtio_queue_vector(vdev, n));
1115
}
1116

1117
static int virtio_ccw_load_queue(DeviceState *d, int n, QEMUFile *f)
1118
{
1119
    VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1120
    VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1121
    uint16_t vector;
1122

1123
    qemu_get_be16s(f, &vector);
1124
    virtio_queue_set_vector(vdev, n , vector);
1125

1126
    return 0;
1127
}
1128

1129
static void virtio_ccw_save_config(DeviceState *d, QEMUFile *f)
1130
{
1131
    VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1132
    vmstate_save_state(f, &vmstate_virtio_ccw_dev, dev, NULL);
1133
}
1134

1135
static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f)
1136
{
1137
    VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1138
    return vmstate_load_state(f, &vmstate_virtio_ccw_dev, dev, 1);
1139
}
1140

1141
static void virtio_ccw_pre_plugged(DeviceState *d, Error **errp)
1142
{
1143
   VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1144
   VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1145

1146
    if (dev->max_rev >= 1) {
1147
        virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1);
1148
    }
1149
}
1150

1151
/* This is called by virtio-bus just after the device is plugged. */
1152
static void virtio_ccw_device_plugged(DeviceState *d, Error **errp)
1153
{
1154
    VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1155
    VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1156
    CcwDevice *ccw_dev = CCW_DEVICE(d);
1157
    SubchDev *sch = ccw_dev->sch;
1158
    int n = virtio_get_num_queues(vdev);
1159
    S390FLICState *flic = s390_get_flic();
1160

1161
    if (!virtio_has_feature(vdev->host_features, VIRTIO_F_VERSION_1)) {
1162
        dev->max_rev = 0;
1163
    }
1164

1165
    if (!virtio_ccw_rev_max(dev) && !virtio_legacy_allowed(vdev)) {
1166
        /*
1167
         * To avoid migration issues, we allow legacy mode when legacy
1168
         * check is disabled in the old machine types (< 5.1).
1169
         */
1170
        if (virtio_legacy_check_disabled(vdev)) {
1171
            warn_report("device requires revision >= 1, but for backward "
1172
                        "compatibility max_revision=0 is allowed");
1173
        } else {
1174
            error_setg(errp, "Invalid value of property max_rev "
1175
                       "(is %d expected >= 1)", virtio_ccw_rev_max(dev));
1176
            return;
1177
        }
1178
    }
1179

1180
    if (virtio_get_num_queues(vdev) > VIRTIO_QUEUE_MAX) {
1181
        error_setg(errp, "The number of virtqueues %d "
1182
                   "exceeds virtio limit %d", n,
1183
                   VIRTIO_QUEUE_MAX);
1184
        return;
1185
    }
1186
    if (virtio_get_num_queues(vdev) > flic->adapter_routes_max_batch) {
1187
        error_setg(errp, "The number of virtqueues %d "
1188
                   "exceeds flic adapter route limit %d", n,
1189
                   flic->adapter_routes_max_batch);
1190
        return;
1191
    }
1192

1193
    sch->id.cu_model = virtio_bus_get_vdev_id(&dev->bus);
1194

1195

1196
    css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid,
1197
                          d->hotplugged, 1);
1198
}
1199

1200
static void virtio_ccw_device_unplugged(DeviceState *d)
1201
{
1202
    VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1203

1204
    virtio_ccw_stop_ioeventfd(dev);
1205
}
1206
/**************** Virtio-ccw Bus Device Descriptions *******************/
1207

1208
static void virtio_ccw_busdev_realize(DeviceState *dev, Error **errp)
1209
{
1210
    VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1211

1212
    virtio_ccw_bus_new(&_dev->bus, sizeof(_dev->bus), _dev);
1213
    virtio_ccw_device_realize(_dev, errp);
1214
}
1215

1216
static void virtio_ccw_busdev_unrealize(DeviceState *dev)
1217
{
1218
    VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1219

1220
    virtio_ccw_device_unrealize(_dev);
1221
}
1222

1223
static void virtio_ccw_busdev_unplug(HotplugHandler *hotplug_dev,
1224
                                     DeviceState *dev, Error **errp)
1225
{
1226
    VirtioCcwDevice *_dev = to_virtio_ccw_dev_fast(dev);
1227

1228
    virtio_ccw_stop_ioeventfd(_dev);
1229
}
1230

1231
static void virtio_ccw_device_class_init(ObjectClass *klass, void *data)
1232
{
1233
    DeviceClass *dc = DEVICE_CLASS(klass);
1234
    CCWDeviceClass *k = CCW_DEVICE_CLASS(dc);
1235
    VirtIOCCWDeviceClass *vdc = VIRTIO_CCW_DEVICE_CLASS(klass);
1236

1237
    k->unplug = virtio_ccw_busdev_unplug;
1238
    dc->realize = virtio_ccw_busdev_realize;
1239
    dc->unrealize = virtio_ccw_busdev_unrealize;
1240
    device_class_set_parent_reset(dc, virtio_ccw_reset, &vdc->parent_reset);
1241
}
1242

1243
static const TypeInfo virtio_ccw_device_info = {
1244
    .name = TYPE_VIRTIO_CCW_DEVICE,
1245
    .parent = TYPE_CCW_DEVICE,
1246
    .instance_size = sizeof(VirtioCcwDevice),
1247
    .class_init = virtio_ccw_device_class_init,
1248
    .class_size = sizeof(VirtIOCCWDeviceClass),
1249
    .abstract = true,
1250
};
1251

1252
/* virtio-ccw-bus */
1253

1254
static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size,
1255
                               VirtioCcwDevice *dev)
1256
{
1257
    DeviceState *qdev = DEVICE(dev);
1258
    char virtio_bus_name[] = "virtio-bus";
1259

1260
    qbus_init(bus, bus_size, TYPE_VIRTIO_CCW_BUS, qdev, virtio_bus_name);
1261
}
1262

1263
static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data)
1264
{
1265
    VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
1266
    BusClass *bus_class = BUS_CLASS(klass);
1267

1268
    bus_class->max_dev = 1;
1269
    k->notify = virtio_ccw_notify;
1270
    k->vmstate_change = virtio_ccw_vmstate_change;
1271
    k->query_guest_notifiers = virtio_ccw_query_guest_notifiers;
1272
    k->set_guest_notifiers = virtio_ccw_set_guest_notifiers;
1273
    k->save_queue = virtio_ccw_save_queue;
1274
    k->load_queue = virtio_ccw_load_queue;
1275
    k->save_config = virtio_ccw_save_config;
1276
    k->load_config = virtio_ccw_load_config;
1277
    k->pre_plugged = virtio_ccw_pre_plugged;
1278
    k->device_plugged = virtio_ccw_device_plugged;
1279
    k->device_unplugged = virtio_ccw_device_unplugged;
1280
    k->ioeventfd_enabled = virtio_ccw_ioeventfd_enabled;
1281
    k->ioeventfd_assign = virtio_ccw_ioeventfd_assign;
1282
}
1283

1284
static const TypeInfo virtio_ccw_bus_info = {
1285
    .name = TYPE_VIRTIO_CCW_BUS,
1286
    .parent = TYPE_VIRTIO_BUS,
1287
    .instance_size = sizeof(VirtioCcwBusState),
1288
    .class_size = sizeof(VirtioCcwBusClass),
1289
    .class_init = virtio_ccw_bus_class_init,
1290
};
1291

1292
static void virtio_ccw_register(void)
1293
{
1294
    type_register_static(&virtio_ccw_bus_info);
1295
    type_register_static(&virtio_ccw_device_info);
1296
}
1297

1298
type_init(virtio_ccw_register)
1299