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26#include "qemu/osdep.h"
27#include "qapi/error.h"
28#include "cpu.h"
29#include "internal.h"
30#include "kvm_s390x.h"
31#include "sysemu/kvm.h"
32#include "qemu-common.h"
33#include "qemu/timer.h"
34#include "qemu/error-report.h"
35#include "trace.h"
36#include "qapi/visitor.h"
37#include "qapi/qapi-visit-misc.h"
38#include "qapi/qapi-visit-run-state.h"
39#include "sysemu/hw_accel.h"
40#include "hw/qdev-properties.h"
41#ifndef CONFIG_USER_ONLY
42#include "hw/hw.h"
43#include "sysemu/arch_init.h"
44#include "sysemu/sysemu.h"
45#endif
46#include "fpu/softfloat.h"
47
48#define CR0_RESET 0xE0UL
49#define CR14_RESET 0xC2000000UL;
50
51static void s390_cpu_set_pc(CPUState *cs, vaddr value)
52{
53 S390CPU *cpu = S390_CPU(cs);
54
55 cpu->env.psw.addr = value;
56}
57
58static bool s390_cpu_has_work(CPUState *cs)
59{
60 S390CPU *cpu = S390_CPU(cs);
61
62
63 if (s390_cpu_get_state(cpu) != S390_CPU_STATE_LOAD &&
64 s390_cpu_get_state(cpu) != S390_CPU_STATE_OPERATING) {
65 return false;
66 }
67
68 if (!(cs->interrupt_request & CPU_INTERRUPT_HARD)) {
69 return false;
70 }
71
72 return s390_cpu_has_int(cpu);
73}
74
75#if !defined(CONFIG_USER_ONLY)
76
77static void s390_cpu_load_normal(CPUState *s)
78{
79 S390CPU *cpu = S390_CPU(s);
80 cpu->env.psw.addr = ldl_phys(s->as, 4) & PSW_MASK_ESA_ADDR;
81 cpu->env.psw.mask = PSW_MASK_32 | PSW_MASK_64;
82 s390_cpu_set_state(S390_CPU_STATE_OPERATING, cpu);
83}
84#endif
85
86
87static void s390_cpu_reset(CPUState *s)
88{
89 S390CPU *cpu = S390_CPU(s);
90 S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
91 CPUS390XState *env = &cpu->env;
92
93 env->pfault_token = -1UL;
94 env->bpbc = false;
95 scc->parent_reset(s);
96 cpu->env.sigp_order = 0;
97 s390_cpu_set_state(S390_CPU_STATE_STOPPED, cpu);
98}
99
100
101static void s390_cpu_initial_reset(CPUState *s)
102{
103 S390CPU *cpu = S390_CPU(s);
104 CPUS390XState *env = &cpu->env;
105
106 s390_cpu_reset(s);
107
108 memset(&env->start_initial_reset_fields, 0,
109 offsetof(CPUS390XState, end_reset_fields) -
110 offsetof(CPUS390XState, start_initial_reset_fields));
111
112
113 env->cregs[0] = CR0_RESET;
114 env->cregs[14] = CR14_RESET;
115
116
117 env->gbea = 1;
118
119 env->pfault_token = -1UL;
120
121
122 set_float_detect_tininess(float_tininess_before_rounding,
123 &env->fpu_status);
124
125
126 if (kvm_enabled()) {
127 kvm_s390_reset_vcpu(cpu);
128 }
129}
130
131
132static void s390_cpu_full_reset(CPUState *s)
133{
134 S390CPU *cpu = S390_CPU(s);
135 S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
136 CPUS390XState *env = &cpu->env;
137
138 scc->parent_reset(s);
139 cpu->env.sigp_order = 0;
140 s390_cpu_set_state(S390_CPU_STATE_STOPPED, cpu);
141
142 memset(env, 0, offsetof(CPUS390XState, end_reset_fields));
143
144
145 env->cregs[0] = CR0_RESET;
146 env->cregs[14] = CR14_RESET;
147
148
149 env->gbea = 1;
150
151 env->pfault_token = -1UL;
152
153
154 set_float_detect_tininess(float_tininess_before_rounding,
155 &env->fpu_status);
156
157
158 if (kvm_enabled()) {
159 kvm_s390_reset_vcpu(cpu);
160 }
161}
162
163#if !defined(CONFIG_USER_ONLY)
164static void s390_cpu_machine_reset_cb(void *opaque)
165{
166 S390CPU *cpu = opaque;
167
168 run_on_cpu(CPU(cpu), s390_do_cpu_full_reset, RUN_ON_CPU_NULL);
169}
170#endif
171
172static void s390_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
173{
174 info->mach = bfd_mach_s390_64;
175 info->print_insn = print_insn_s390;
176}
177
178static void s390_cpu_realizefn(DeviceState *dev, Error **errp)
179{
180 CPUState *cs = CPU(dev);
181 S390CPUClass *scc = S390_CPU_GET_CLASS(dev);
182#if !defined(CONFIG_USER_ONLY)
183 S390CPU *cpu = S390_CPU(dev);
184#endif
185 Error *err = NULL;
186
187
188 s390_realize_cpu_model(cs, &err);
189 if (err) {
190 goto out;
191 }
192
193#if !defined(CONFIG_USER_ONLY)
194 if (cpu->env.core_id >= max_cpus) {
195 error_setg(&err, "Unable to add CPU with core-id: %" PRIu32
196 ", maximum core-id: %d", cpu->env.core_id,
197 max_cpus - 1);
198 goto out;
199 }
200
201 if (cpu_exists(cpu->env.core_id)) {
202 error_setg(&err, "Unable to add CPU with core-id: %" PRIu32
203 ", it already exists", cpu->env.core_id);
204 goto out;
205 }
206
207
208 cs->cpu_index = cpu->env.core_id;
209#endif
210
211 cpu_exec_realizefn(cs, &err);
212 if (err != NULL) {
213 goto out;
214 }
215
216#if !defined(CONFIG_USER_ONLY)
217 qemu_register_reset(s390_cpu_machine_reset_cb, cpu);
218#endif
219 s390_cpu_gdb_init(cs);
220 qemu_init_vcpu(cs);
221
222
223
224
225
226
227
228 if (kvm_enabled()) {
229 run_on_cpu(cs, s390_do_cpu_full_reset, RUN_ON_CPU_NULL);
230 } else {
231 cpu_reset(cs);
232 }
233
234 scc->parent_realize(dev, &err);
235out:
236 error_propagate(errp, err);
237}
238
239static GuestPanicInformation *s390_cpu_get_crash_info(CPUState *cs)
240{
241 GuestPanicInformation *panic_info;
242 S390CPU *cpu = S390_CPU(cs);
243
244 cpu_synchronize_state(cs);
245 panic_info = g_malloc0(sizeof(GuestPanicInformation));
246
247 panic_info->type = GUEST_PANIC_INFORMATION_TYPE_S390;
248#if !defined(CONFIG_USER_ONLY)
249 panic_info->u.s390.core = cpu->env.core_id;
250#else
251 panic_info->u.s390.core = 0;
252#endif
253 panic_info->u.s390.psw_mask = cpu->env.psw.mask;
254 panic_info->u.s390.psw_addr = cpu->env.psw.addr;
255 panic_info->u.s390.reason = cpu->env.crash_reason;
256
257 return panic_info;
258}
259
260static void s390_cpu_get_crash_info_qom(Object *obj, Visitor *v,
261 const char *name, void *opaque,
262 Error **errp)
263{
264 CPUState *cs = CPU(obj);
265 GuestPanicInformation *panic_info;
266
267 if (!cs->crash_occurred) {
268 error_setg(errp, "No crash occurred");
269 return;
270 }
271
272 panic_info = s390_cpu_get_crash_info(cs);
273
274 visit_type_GuestPanicInformation(v, "crash-information", &panic_info,
275 errp);
276 qapi_free_GuestPanicInformation(panic_info);
277}
278
279static void s390_cpu_initfn(Object *obj)
280{
281 CPUState *cs = CPU(obj);
282 S390CPU *cpu = S390_CPU(obj);
283 CPUS390XState *env = &cpu->env;
284
285 cs->env_ptr = env;
286 cs->halted = 1;
287 cs->exception_index = EXCP_HLT;
288 object_property_add(obj, "crash-information", "GuestPanicInformation",
289 s390_cpu_get_crash_info_qom, NULL, NULL, NULL, NULL);
290 s390_cpu_model_register_props(obj);
291#if !defined(CONFIG_USER_ONLY)
292 env->tod_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_tod_timer, cpu);
293 env->cpu_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_cpu_timer, cpu);
294 s390_cpu_set_state(S390_CPU_STATE_STOPPED, cpu);
295#endif
296}
297
298static void s390_cpu_finalize(Object *obj)
299{
300#if !defined(CONFIG_USER_ONLY)
301 S390CPU *cpu = S390_CPU(obj);
302
303 qemu_unregister_reset(s390_cpu_machine_reset_cb, cpu);
304 g_free(cpu->irqstate);
305#endif
306}
307
308#if !defined(CONFIG_USER_ONLY)
309static bool disabled_wait(CPUState *cpu)
310{
311 return cpu->halted && !(S390_CPU(cpu)->env.psw.mask &
312 (PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK));
313}
314
315static unsigned s390_count_running_cpus(void)
316{
317 CPUState *cpu;
318 int nr_running = 0;
319
320 CPU_FOREACH(cpu) {
321 uint8_t state = S390_CPU(cpu)->env.cpu_state;
322 if (state == S390_CPU_STATE_OPERATING ||
323 state == S390_CPU_STATE_LOAD) {
324 if (!disabled_wait(cpu)) {
325 nr_running++;
326 }
327 }
328 }
329
330 return nr_running;
331}
332
333unsigned int s390_cpu_halt(S390CPU *cpu)
334{
335 CPUState *cs = CPU(cpu);
336 trace_cpu_halt(cs->cpu_index);
337
338 if (!cs->halted) {
339 cs->halted = 1;
340 cs->exception_index = EXCP_HLT;
341 }
342
343 return s390_count_running_cpus();
344}
345
346void s390_cpu_unhalt(S390CPU *cpu)
347{
348 CPUState *cs = CPU(cpu);
349 trace_cpu_unhalt(cs->cpu_index);
350
351 if (cs->halted) {
352 cs->halted = 0;
353 cs->exception_index = -1;
354 }
355}
356
357unsigned int s390_cpu_set_state(uint8_t cpu_state, S390CPU *cpu)
358 {
359 trace_cpu_set_state(CPU(cpu)->cpu_index, cpu_state);
360
361 switch (cpu_state) {
362 case S390_CPU_STATE_STOPPED:
363 case S390_CPU_STATE_CHECK_STOP:
364
365 s390_cpu_halt(cpu);
366 break;
367 case S390_CPU_STATE_OPERATING:
368 case S390_CPU_STATE_LOAD:
369
370
371
372
373
374
375 if (!tcg_enabled() || !(cpu->env.psw.mask & PSW_MASK_WAIT)) {
376 s390_cpu_unhalt(cpu);
377 }
378 break;
379 default:
380 error_report("Requested CPU state is not a valid S390 CPU state: %u",
381 cpu_state);
382 exit(1);
383 }
384 if (kvm_enabled() && cpu->env.cpu_state != cpu_state) {
385 kvm_s390_set_cpu_state(cpu, cpu_state);
386 }
387 cpu->env.cpu_state = cpu_state;
388
389 return s390_count_running_cpus();
390}
391
392int s390_set_memory_limit(uint64_t new_limit, uint64_t *hw_limit)
393{
394 if (kvm_enabled()) {
395 return kvm_s390_set_mem_limit(new_limit, hw_limit);
396 }
397 return 0;
398}
399
400void s390_cmma_reset(void)
401{
402 if (kvm_enabled()) {
403 kvm_s390_cmma_reset();
404 }
405}
406
407int s390_assign_subch_ioeventfd(EventNotifier *notifier, uint32_t sch_id,
408 int vq, bool assign)
409{
410 if (kvm_enabled()) {
411 return kvm_s390_assign_subch_ioeventfd(notifier, sch_id, vq, assign);
412 } else {
413 return 0;
414 }
415}
416
417void s390_crypto_reset(void)
418{
419 if (kvm_enabled()) {
420 kvm_s390_crypto_reset();
421 }
422}
423
424bool s390_get_squash_mcss(void)
425{
426 if (object_property_get_bool(OBJECT(qdev_get_machine()), "s390-squash-mcss",
427 NULL)) {
428 return true;
429 }
430
431 return false;
432}
433
434void s390_enable_css_support(S390CPU *cpu)
435{
436 if (kvm_enabled()) {
437 kvm_s390_enable_css_support(cpu);
438 }
439}
440#endif
441
442static gchar *s390_gdb_arch_name(CPUState *cs)
443{
444 return g_strdup("s390:64-bit");
445}
446
447static Property s390x_cpu_properties[] = {
448#if !defined(CONFIG_USER_ONLY)
449 DEFINE_PROP_UINT32("core-id", S390CPU, env.core_id, 0),
450#endif
451 DEFINE_PROP_END_OF_LIST()
452};
453
454static void s390_cpu_class_init(ObjectClass *oc, void *data)
455{
456 S390CPUClass *scc = S390_CPU_CLASS(oc);
457 CPUClass *cc = CPU_CLASS(scc);
458 DeviceClass *dc = DEVICE_CLASS(oc);
459
460 device_class_set_parent_realize(dc, s390_cpu_realizefn,
461 &scc->parent_realize);
462 dc->props = s390x_cpu_properties;
463 dc->user_creatable = true;
464
465 scc->parent_reset = cc->reset;
466#if !defined(CONFIG_USER_ONLY)
467 scc->load_normal = s390_cpu_load_normal;
468#endif
469 scc->cpu_reset = s390_cpu_reset;
470 scc->initial_cpu_reset = s390_cpu_initial_reset;
471 cc->reset = s390_cpu_full_reset;
472 cc->class_by_name = s390_cpu_class_by_name,
473 cc->has_work = s390_cpu_has_work;
474#ifdef CONFIG_TCG
475 cc->do_interrupt = s390_cpu_do_interrupt;
476#endif
477 cc->dump_state = s390_cpu_dump_state;
478 cc->get_crash_info = s390_cpu_get_crash_info;
479 cc->set_pc = s390_cpu_set_pc;
480 cc->gdb_read_register = s390_cpu_gdb_read_register;
481 cc->gdb_write_register = s390_cpu_gdb_write_register;
482#ifdef CONFIG_USER_ONLY
483 cc->handle_mmu_fault = s390_cpu_handle_mmu_fault;
484#else
485 cc->get_phys_page_debug = s390_cpu_get_phys_page_debug;
486 cc->vmsd = &vmstate_s390_cpu;
487 cc->write_elf64_note = s390_cpu_write_elf64_note;
488#ifdef CONFIG_TCG
489 cc->cpu_exec_interrupt = s390_cpu_exec_interrupt;
490 cc->debug_excp_handler = s390x_cpu_debug_excp_handler;
491 cc->do_unaligned_access = s390x_cpu_do_unaligned_access;
492#endif
493#endif
494 cc->disas_set_info = s390_cpu_disas_set_info;
495#ifdef CONFIG_TCG
496 cc->tcg_initialize = s390x_translate_init;
497#endif
498
499 cc->gdb_num_core_regs = S390_NUM_CORE_REGS;
500 cc->gdb_core_xml_file = "s390x-core64.xml";
501 cc->gdb_arch_name = s390_gdb_arch_name;
502
503 s390_cpu_model_class_register_props(oc);
504}
505
506static const TypeInfo s390_cpu_type_info = {
507 .name = TYPE_S390_CPU,
508 .parent = TYPE_CPU,
509 .instance_size = sizeof(S390CPU),
510 .instance_init = s390_cpu_initfn,
511 .instance_finalize = s390_cpu_finalize,
512 .abstract = true,
513 .class_size = sizeof(S390CPUClass),
514 .class_init = s390_cpu_class_init,
515};
516
517static void s390_cpu_register_types(void)
518{
519 type_register_static(&s390_cpu_type_info);
520}
521
522type_init(s390_cpu_register_types)
523
