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13#include "qemu/osdep.h"
14#include "qemu/error-report.h"
15#include "qemu/main-loop.h"
16#include "qemu/module.h"
17#include "hw/sysbus.h"
18#include "hw/s390x/ioinst.h"
19#include "hw/s390x/s390_flic.h"
20#include "hw/qdev-properties.h"
21#include "hw/s390x/css.h"
22#include "trace.h"
23#include "cpu.h"
24#include "qapi/error.h"
25#include "hw/s390x/s390-virtio-ccw.h"
26
27S390FLICStateClass *s390_get_flic_class(S390FLICState *fs)
28{
29 static S390FLICStateClass *class;
30
31 if (!class) {
32
33 class = S390_FLIC_COMMON_GET_CLASS(fs);
34 }
35 return class;
36}
37
38QEMUS390FLICState *s390_get_qemu_flic(S390FLICState *fs)
39{
40 static QEMUS390FLICState *flic;
41
42 if (!flic) {
43
44 flic = QEMU_S390_FLIC(fs);
45 }
46 return flic;
47}
48
49S390FLICState *s390_get_flic(void)
50{
51 static S390FLICState *fs;
52
53 if (!fs) {
54 fs = S390_FLIC_COMMON(object_resolve_path_type("",
55 TYPE_S390_FLIC_COMMON,
56 NULL));
57 }
58 return fs;
59}
60
61void s390_flic_init(void)
62{
63 DeviceState *dev;
64
65 if (kvm_enabled()) {
66 dev = qdev_create(NULL, TYPE_KVM_S390_FLIC);
67 object_property_add_child(qdev_get_machine(), TYPE_KVM_S390_FLIC,
68 OBJECT(dev), NULL);
69 } else {
70 dev = qdev_create(NULL, TYPE_QEMU_S390_FLIC);
71 object_property_add_child(qdev_get_machine(), TYPE_QEMU_S390_FLIC,
72 OBJECT(dev), NULL);
73 }
74 qdev_init_nofail(dev);
75}
76
77static int qemu_s390_register_io_adapter(S390FLICState *fs, uint32_t id,
78 uint8_t isc, bool swap,
79 bool is_maskable, uint8_t flags)
80{
81
82 return 0;
83}
84
85static int qemu_s390_io_adapter_map(S390FLICState *fs, uint32_t id,
86 uint64_t map_addr, bool do_map)
87{
88
89 return 0;
90}
91
92static int qemu_s390_add_adapter_routes(S390FLICState *fs,
93 AdapterRoutes *routes)
94{
95 return -ENOSYS;
96}
97
98static void qemu_s390_release_adapter_routes(S390FLICState *fs,
99 AdapterRoutes *routes)
100{
101}
102
103static int qemu_s390_clear_io_flic(S390FLICState *fs, uint16_t subchannel_id,
104 uint16_t subchannel_nr)
105{
106 QEMUS390FLICState *flic = s390_get_qemu_flic(fs);
107 QEMUS390FlicIO *cur, *next;
108 uint8_t isc;
109
110 g_assert(qemu_mutex_iothread_locked());
111 if (!(flic->pending & FLIC_PENDING_IO)) {
112 return 0;
113 }
114
115
116 for (isc = 0; isc < 8; isc++) {
117 if (QLIST_EMPTY(&flic->io[isc])) {
118 continue;
119 }
120
121
122 QLIST_FOREACH_SAFE(cur, &flic->io[isc], next, next) {
123 if (cur->id == subchannel_id && cur->nr == subchannel_nr) {
124 QLIST_REMOVE(cur, next);
125 g_free(cur);
126 }
127 }
128
129
130 if (QLIST_EMPTY(&flic->io[isc])) {
131 flic->pending &= ~ISC_TO_PENDING_IO(isc);
132 }
133 }
134 return 0;
135}
136
137static int qemu_s390_modify_ais_mode(S390FLICState *fs, uint8_t isc,
138 uint16_t mode)
139{
140 QEMUS390FLICState *flic = s390_get_qemu_flic(fs);
141
142 switch (mode) {
143 case SIC_IRQ_MODE_ALL:
144 flic->simm &= ~AIS_MODE_MASK(isc);
145 flic->nimm &= ~AIS_MODE_MASK(isc);
146 break;
147 case SIC_IRQ_MODE_SINGLE:
148 flic->simm |= AIS_MODE_MASK(isc);
149 flic->nimm &= ~AIS_MODE_MASK(isc);
150 break;
151 default:
152 return -EINVAL;
153 }
154
155 return 0;
156}
157
158static int qemu_s390_inject_airq(S390FLICState *fs, uint8_t type,
159 uint8_t isc, uint8_t flags)
160{
161 QEMUS390FLICState *flic = s390_get_qemu_flic(fs);
162 S390FLICStateClass *fsc = s390_get_flic_class(fs);
163 bool flag = flags & S390_ADAPTER_SUPPRESSIBLE;
164 uint32_t io_int_word = (isc << 27) | IO_INT_WORD_AI;
165
166 if (flag && (flic->nimm & AIS_MODE_MASK(isc))) {
167 trace_qemu_s390_airq_suppressed(type, isc);
168 return 0;
169 }
170
171 fsc->inject_io(fs, 0, 0, 0, io_int_word);
172
173 if (flag && (flic->simm & AIS_MODE_MASK(isc))) {
174 flic->nimm |= AIS_MODE_MASK(isc);
175 trace_qemu_s390_suppress_airq(isc, "Single-Interruption Mode",
176 "NO-Interruptions Mode");
177 }
178
179 return 0;
180}
181
182static void qemu_s390_flic_notify(uint32_t type)
183{
184 CPUState *cs;
185
186
187
188
189
190
191 CPU_FOREACH(cs) {
192 S390CPU *cpu = S390_CPU(cs);
193
194 cs->interrupt_request |= CPU_INTERRUPT_HARD;
195
196
197 if (s390_cpu_get_state(cpu) != S390_CPU_STATE_OPERATING &&
198 s390_cpu_get_state(cpu) != S390_CPU_STATE_LOAD) {
199 continue;
200 }
201
202
203 if (cs->halted) {
204
205 if (type & FLIC_PENDING_SERVICE) {
206 if (!(cpu->env.psw.mask & PSW_MASK_EXT)) {
207 continue;
208 }
209 } else if (type & FLIC_PENDING_IO) {
210 if (!(cpu->env.psw.mask & PSW_MASK_IO)) {
211 continue;
212 }
213 } else if (type & FLIC_PENDING_MCHK_CR) {
214 if (!(cpu->env.psw.mask & PSW_MASK_MCHECK)) {
215 continue;
216 }
217 }
218 }
219 cpu_interrupt(cs, CPU_INTERRUPT_HARD);
220 }
221}
222
223uint32_t qemu_s390_flic_dequeue_service(QEMUS390FLICState *flic)
224{
225 uint32_t tmp;
226
227 g_assert(qemu_mutex_iothread_locked());
228 g_assert(flic->pending & FLIC_PENDING_SERVICE);
229 tmp = flic->service_param;
230 flic->service_param = 0;
231 flic->pending &= ~FLIC_PENDING_SERVICE;
232
233 return tmp;
234}
235
236
237QEMUS390FlicIO *qemu_s390_flic_dequeue_io(QEMUS390FLICState *flic, uint64_t cr6)
238{
239 QEMUS390FlicIO *io;
240 uint8_t isc;
241
242 g_assert(qemu_mutex_iothread_locked());
243 if (!(flic->pending & CR6_TO_PENDING_IO(cr6))) {
244 return NULL;
245 }
246
247 for (isc = 0; isc < 8; isc++) {
248 if (QLIST_EMPTY(&flic->io[isc]) || !(cr6 & ISC_TO_ISC_BITS(isc))) {
249 continue;
250 }
251 io = QLIST_FIRST(&flic->io[isc]);
252 QLIST_REMOVE(io, next);
253
254
255 if (QLIST_EMPTY(&flic->io[isc])) {
256 flic->pending &= ~ISC_TO_PENDING_IO(isc);
257 }
258 return io;
259 }
260
261 return NULL;
262}
263
264void qemu_s390_flic_dequeue_crw_mchk(QEMUS390FLICState *flic)
265{
266 g_assert(qemu_mutex_iothread_locked());
267 g_assert(flic->pending & FLIC_PENDING_MCHK_CR);
268 flic->pending &= ~FLIC_PENDING_MCHK_CR;
269}
270
271static void qemu_s390_inject_service(S390FLICState *fs, uint32_t parm)
272{
273 QEMUS390FLICState *flic = s390_get_qemu_flic(fs);
274
275 g_assert(qemu_mutex_iothread_locked());
276
277 flic->service_param |= parm;
278 flic->pending |= FLIC_PENDING_SERVICE;
279
280 qemu_s390_flic_notify(FLIC_PENDING_SERVICE);
281}
282
283static void qemu_s390_inject_io(S390FLICState *fs, uint16_t subchannel_id,
284 uint16_t subchannel_nr, uint32_t io_int_parm,
285 uint32_t io_int_word)
286{
287 const uint8_t isc = IO_INT_WORD_ISC(io_int_word);
288 QEMUS390FLICState *flic = s390_get_qemu_flic(fs);
289 QEMUS390FlicIO *io;
290
291 g_assert(qemu_mutex_iothread_locked());
292 io = g_new0(QEMUS390FlicIO, 1);
293 io->id = subchannel_id;
294 io->nr = subchannel_nr;
295 io->parm = io_int_parm;
296 io->word = io_int_word;
297
298 QLIST_INSERT_HEAD(&flic->io[isc], io, next);
299 flic->pending |= ISC_TO_PENDING_IO(isc);
300
301 qemu_s390_flic_notify(ISC_TO_PENDING_IO(isc));
302}
303
304static void qemu_s390_inject_crw_mchk(S390FLICState *fs)
305{
306 QEMUS390FLICState *flic = s390_get_qemu_flic(fs);
307
308 g_assert(qemu_mutex_iothread_locked());
309 flic->pending |= FLIC_PENDING_MCHK_CR;
310
311 qemu_s390_flic_notify(FLIC_PENDING_MCHK_CR);
312}
313
314bool qemu_s390_flic_has_service(QEMUS390FLICState *flic)
315{
316
317 return !!(flic->pending & FLIC_PENDING_SERVICE);
318}
319
320bool qemu_s390_flic_has_io(QEMUS390FLICState *flic, uint64_t cr6)
321{
322
323 return !!(flic->pending & CR6_TO_PENDING_IO(cr6));
324}
325
326bool qemu_s390_flic_has_crw_mchk(QEMUS390FLICState *flic)
327{
328
329 return !!(flic->pending & FLIC_PENDING_MCHK_CR);
330}
331
332bool qemu_s390_flic_has_any(QEMUS390FLICState *flic)
333{
334 g_assert(qemu_mutex_iothread_locked());
335 return !!flic->pending;
336}
337
338static void qemu_s390_flic_reset(DeviceState *dev)
339{
340 QEMUS390FLICState *flic = QEMU_S390_FLIC(dev);
341 QEMUS390FlicIO *cur, *next;
342 int isc;
343
344 g_assert(qemu_mutex_iothread_locked());
345 flic->simm = 0;
346 flic->nimm = 0;
347 flic->pending = 0;
348
349
350 for (isc = 0; isc < 8; isc++) {
351 QLIST_FOREACH_SAFE(cur, &flic->io[isc], next, next) {
352 QLIST_REMOVE(cur, next);
353 g_free(cur);
354 }
355 }
356}
357
358bool ais_needed(void *opaque)
359{
360 S390FLICState *s = opaque;
361
362 return s->ais_supported;
363}
364
365static const VMStateDescription qemu_s390_flic_vmstate = {
366 .name = "qemu-s390-flic",
367 .version_id = 1,
368 .minimum_version_id = 1,
369 .needed = ais_needed,
370 .fields = (VMStateField[]) {
371 VMSTATE_UINT8(simm, QEMUS390FLICState),
372 VMSTATE_UINT8(nimm, QEMUS390FLICState),
373 VMSTATE_END_OF_LIST()
374 }
375};
376
377static void qemu_s390_flic_instance_init(Object *obj)
378{
379 QEMUS390FLICState *flic = QEMU_S390_FLIC(obj);
380 int isc;
381
382 for (isc = 0; isc < 8; isc++) {
383 QLIST_INIT(&flic->io[isc]);
384 }
385}
386
387static void qemu_s390_flic_class_init(ObjectClass *oc, void *data)
388{
389 DeviceClass *dc = DEVICE_CLASS(oc);
390 S390FLICStateClass *fsc = S390_FLIC_COMMON_CLASS(oc);
391
392 dc->reset = qemu_s390_flic_reset;
393 dc->vmsd = &qemu_s390_flic_vmstate;
394 fsc->register_io_adapter = qemu_s390_register_io_adapter;
395 fsc->io_adapter_map = qemu_s390_io_adapter_map;
396 fsc->add_adapter_routes = qemu_s390_add_adapter_routes;
397 fsc->release_adapter_routes = qemu_s390_release_adapter_routes;
398 fsc->clear_io_irq = qemu_s390_clear_io_flic;
399 fsc->modify_ais_mode = qemu_s390_modify_ais_mode;
400 fsc->inject_airq = qemu_s390_inject_airq;
401 fsc->inject_service = qemu_s390_inject_service;
402 fsc->inject_io = qemu_s390_inject_io;
403 fsc->inject_crw_mchk = qemu_s390_inject_crw_mchk;
404}
405
406static Property s390_flic_common_properties[] = {
407 DEFINE_PROP_UINT32("adapter_routes_max_batch", S390FLICState,
408 adapter_routes_max_batch, ADAPTER_ROUTES_MAX_GSI),
409 DEFINE_PROP_END_OF_LIST(),
410};
411
412static void s390_flic_common_realize(DeviceState *dev, Error **errp)
413{
414 S390FLICState *fs = S390_FLIC_COMMON(dev);
415 uint32_t max_batch = fs->adapter_routes_max_batch;
416
417 if (max_batch > ADAPTER_ROUTES_MAX_GSI) {
418 error_setg(errp, "flic property adapter_routes_max_batch too big"
419 " (%d > %d)", max_batch, ADAPTER_ROUTES_MAX_GSI);
420 return;
421 }
422
423 fs->ais_supported = s390_has_feat(S390_FEAT_ADAPTER_INT_SUPPRESSION);
424}
425
426static void s390_flic_class_init(ObjectClass *oc, void *data)
427{
428 DeviceClass *dc = DEVICE_CLASS(oc);
429
430 dc->props = s390_flic_common_properties;
431 dc->realize = s390_flic_common_realize;
432}
433
434static const TypeInfo qemu_s390_flic_info = {
435 .name = TYPE_QEMU_S390_FLIC,
436 .parent = TYPE_S390_FLIC_COMMON,
437 .instance_size = sizeof(QEMUS390FLICState),
438 .instance_init = qemu_s390_flic_instance_init,
439 .class_init = qemu_s390_flic_class_init,
440};
441
442
443static const TypeInfo s390_flic_common_info = {
444 .name = TYPE_S390_FLIC_COMMON,
445 .parent = TYPE_SYS_BUS_DEVICE,
446 .instance_size = sizeof(S390FLICState),
447 .class_init = s390_flic_class_init,
448 .class_size = sizeof(S390FLICStateClass),
449};
450
451static void qemu_s390_flic_register_types(void)
452{
453 type_register_static(&s390_flic_common_info);
454 type_register_static(&qemu_s390_flic_info);
455}
456
457type_init(qemu_s390_flic_register_types)
458
459static bool adapter_info_so_needed(void *opaque)
460{
461 return css_migration_enabled();
462}
463
464const VMStateDescription vmstate_adapter_info_so = {
465 .name = "s390_adapter_info/summary_offset",
466 .version_id = 1,
467 .minimum_version_id = 1,
468 .needed = adapter_info_so_needed,
469 .fields = (VMStateField[]) {
470 VMSTATE_UINT32(summary_offset, AdapterInfo),
471 VMSTATE_END_OF_LIST()
472 }
473};
474
475const VMStateDescription vmstate_adapter_info = {
476 .name = "s390_adapter_info",
477 .version_id = 1,
478 .minimum_version_id = 1,
479 .fields = (VMStateField[]) {
480 VMSTATE_UINT64(ind_offset, AdapterInfo),
481
482
483
484
485
486 VMSTATE_END_OF_LIST()
487 },
488 .subsections = (const VMStateDescription * []) {
489 &vmstate_adapter_info_so,
490 NULL
491 }
492};
493
494const VMStateDescription vmstate_adapter_routes = {
495
496 .name = "s390_adapter_routes",
497 .version_id = 1,
498 .minimum_version_id = 1,
499 .fields = (VMStateField[]) {
500 VMSTATE_STRUCT(adapter, AdapterRoutes, 1, vmstate_adapter_info,
501 AdapterInfo),
502 VMSTATE_END_OF_LIST()
503 }
504};
505