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#include "qemu/osdep.h"
27#include "qapi/error.h"
28#include "cpu.h"
29#include "qemu-common.h"
30#include "qemu/cutils.h"
31#include "qemu/timer.h"
32#include "qemu/error-report.h"
33#include "trace.h"
34#include "qapi/visitor.h"
35#include "migration/vmstate.h"
36#include "exec/exec-all.h"
37#ifndef CONFIG_USER_ONLY
38#include "hw/hw.h"
39#include "sysemu/arch_init.h"
40#include "sysemu/sysemu.h"
41#include "hw/s390x/sclp.h"
42#endif
43
44#define CR0_RESET 0xE0UL
45#define CR14_RESET 0xC2000000UL;
46
47
48void s390_cpu_list(FILE *f, fprintf_function cpu_fprintf)
49{
50#ifdef CONFIG_KVM
51 (*cpu_fprintf)(f, "s390 %16s\n", "host");
52#endif
53}
54
55#ifndef CONFIG_USER_ONLY
56CpuDefinitionInfoList *arch_query_cpu_definitions(Error **errp)
57{
58 CpuDefinitionInfoList *entry;
59 CpuDefinitionInfo *info;
60
61 info = g_malloc0(sizeof(*info));
62 info->name = g_strdup("host");
63
64 entry = g_malloc0(sizeof(*entry));
65 entry->value = info;
66
67 return entry;
68}
69#endif
70
71static void s390_cpu_set_pc(CPUState *cs, vaddr value)
72{
73 S390CPU *cpu = S390_CPU(cs);
74
75 cpu->env.psw.addr = value;
76}
77
78static bool s390_cpu_has_work(CPUState *cs)
79{
80 S390CPU *cpu = S390_CPU(cs);
81 CPUS390XState *env = &cpu->env;
82
83 return (cs->interrupt_request & CPU_INTERRUPT_HARD) &&
84 (env->psw.mask & PSW_MASK_EXT);
85}
86
87#if !defined(CONFIG_USER_ONLY)
88
89static void s390_cpu_load_normal(CPUState *s)
90{
91 S390CPU *cpu = S390_CPU(s);
92 cpu->env.psw.addr = ldl_phys(s->as, 4) & PSW_MASK_ESA_ADDR;
93 cpu->env.psw.mask = PSW_MASK_32 | PSW_MASK_64;
94 s390_cpu_set_state(CPU_STATE_OPERATING, cpu);
95}
96#endif
97
98
99static void s390_cpu_reset(CPUState *s)
100{
101 S390CPU *cpu = S390_CPU(s);
102 S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
103 CPUS390XState *env = &cpu->env;
104
105 env->pfault_token = -1UL;
106 scc->parent_reset(s);
107 cpu->env.sigp_order = 0;
108 s390_cpu_set_state(CPU_STATE_STOPPED, cpu);
109 tlb_flush(s, 1);
110}
111
112
113static void s390_cpu_initial_reset(CPUState *s)
114{
115 S390CPU *cpu = S390_CPU(s);
116 CPUS390XState *env = &cpu->env;
117 int i;
118
119 s390_cpu_reset(s);
120
121 memset(&env->fpc, 0, offsetof(CPUS390XState, cpu_num) -
122 offsetof(CPUS390XState, fpc));
123
124
125 env->cregs[0] = CR0_RESET;
126 env->cregs[14] = CR14_RESET;
127
128
129 env->gbea = 1;
130
131 env->pfault_token = -1UL;
132 env->ext_index = -1;
133 for (i = 0; i < ARRAY_SIZE(env->io_index); i++) {
134 env->io_index[i] = -1;
135 }
136
137
138 set_float_detect_tininess(float_tininess_before_rounding,
139 &env->fpu_status);
140
141
142 if (kvm_enabled()) {
143 kvm_s390_reset_vcpu(cpu);
144 }
145 tlb_flush(s, 1);
146}
147
148
149static void s390_cpu_full_reset(CPUState *s)
150{
151 S390CPU *cpu = S390_CPU(s);
152 S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
153 CPUS390XState *env = &cpu->env;
154 int i;
155
156 scc->parent_reset(s);
157 cpu->env.sigp_order = 0;
158 s390_cpu_set_state(CPU_STATE_STOPPED, cpu);
159
160 memset(env, 0, offsetof(CPUS390XState, cpu_num));
161
162
163 env->cregs[0] = CR0_RESET;
164 env->cregs[14] = CR14_RESET;
165
166
167 env->gbea = 1;
168
169 env->pfault_token = -1UL;
170 env->ext_index = -1;
171 for (i = 0; i < ARRAY_SIZE(env->io_index); i++) {
172 env->io_index[i] = -1;
173 }
174
175
176 set_float_detect_tininess(float_tininess_before_rounding,
177 &env->fpu_status);
178
179
180 if (kvm_enabled()) {
181 kvm_s390_reset_vcpu(cpu);
182 }
183 tlb_flush(s, 1);
184}
185
186#if !defined(CONFIG_USER_ONLY)
187static void s390_cpu_machine_reset_cb(void *opaque)
188{
189 S390CPU *cpu = opaque;
190
191 run_on_cpu(CPU(cpu), s390_do_cpu_full_reset, CPU(cpu));
192}
193#endif
194
195static void s390_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
196{
197 info->mach = bfd_mach_s390_64;
198 info->print_insn = print_insn_s390;
199}
200
201static void s390_cpu_realizefn(DeviceState *dev, Error **errp)
202{
203 CPUState *cs = CPU(dev);
204 S390CPUClass *scc = S390_CPU_GET_CLASS(dev);
205 S390CPU *cpu = S390_CPU(dev);
206 CPUS390XState *env = &cpu->env;
207 Error *err = NULL;
208
209#if !defined(CONFIG_USER_ONLY)
210 if (cpu->id >= max_cpus) {
211 error_setg(&err, "Unable to add CPU: %" PRIi64
212 ", max allowed: %d", cpu->id, max_cpus - 1);
213 goto out;
214 }
215#endif
216 if (cpu_exists(cpu->id)) {
217 error_setg(&err, "Unable to add CPU: %" PRIi64
218 ", it already exists", cpu->id);
219 goto out;
220 }
221 if (cpu->id != scc->next_cpu_id) {
222 error_setg(&err, "Unable to add CPU: %" PRIi64
223 ", The next available id is %" PRIi64, cpu->id,
224 scc->next_cpu_id);
225 goto out;
226 }
227
228 cpu_exec_init(cs, &err);
229 if (err != NULL) {
230 goto out;
231 }
232 scc->next_cpu_id++;
233
234#if !defined(CONFIG_USER_ONLY)
235 qemu_register_reset(s390_cpu_machine_reset_cb, cpu);
236#endif
237 env->cpu_num = cpu->id;
238 s390_cpu_gdb_init(cs);
239 qemu_init_vcpu(cs);
240#if !defined(CONFIG_USER_ONLY)
241 run_on_cpu(cs, s390_do_cpu_full_reset, cs);
242#else
243 cpu_reset(cs);
244#endif
245
246 scc->parent_realize(dev, &err);
247
248#if !defined(CONFIG_USER_ONLY)
249 if (dev->hotplugged) {
250 raise_irq_cpu_hotplug();
251 }
252#endif
253
254out:
255 error_propagate(errp, err);
256}
257
258static void s390x_cpu_get_id(Object *obj, Visitor *v, const char *name,
259 void *opaque, Error **errp)
260{
261 S390CPU *cpu = S390_CPU(obj);
262 int64_t value = cpu->id;
263
264 visit_type_int(v, name, &value, errp);
265}
266
267static void s390x_cpu_set_id(Object *obj, Visitor *v, const char *name,
268 void *opaque, Error **errp)
269{
270 S390CPU *cpu = S390_CPU(obj);
271 DeviceState *dev = DEVICE(obj);
272 const int64_t min = 0;
273 const int64_t max = UINT32_MAX;
274 Error *err = NULL;
275 int64_t value;
276
277 if (dev->realized) {
278 error_setg(errp, "Attempt to set property '%s' on '%s' after "
279 "it was realized", name, object_get_typename(obj));
280 return;
281 }
282
283 visit_type_int(v, name, &value, &err);
284 if (err) {
285 error_propagate(errp, err);
286 return;
287 }
288 if (value < min || value > max) {
289 error_setg(errp, "Property %s.%s doesn't take value %" PRId64
290 " (minimum: %" PRId64 ", maximum: %" PRId64 ")" ,
291 object_get_typename(obj), name, value, min, max);
292 return;
293 }
294 cpu->id = value;
295}
296
297static void s390_cpu_initfn(Object *obj)
298{
299 CPUState *cs = CPU(obj);
300 S390CPU *cpu = S390_CPU(obj);
301 CPUS390XState *env = &cpu->env;
302 static bool inited;
303#if !defined(CONFIG_USER_ONLY)
304 struct tm tm;
305#endif
306
307 cs->env_ptr = env;
308 cs->halted = 1;
309 cs->exception_index = EXCP_HLT;
310 object_property_add(OBJECT(cpu), "id", "int64_t", s390x_cpu_get_id,
311 s390x_cpu_set_id, NULL, NULL, NULL);
312#if !defined(CONFIG_USER_ONLY)
313 qemu_get_timedate(&tm, 0);
314 env->tod_offset = TOD_UNIX_EPOCH +
315 (time2tod(mktimegm(&tm)) * 1000000000ULL);
316 env->tod_basetime = 0;
317 env->tod_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_tod_timer, cpu);
318 env->cpu_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_cpu_timer, cpu);
319 s390_cpu_set_state(CPU_STATE_STOPPED, cpu);
320#endif
321
322 if (tcg_enabled() && !inited) {
323 inited = true;
324 s390x_translate_init();
325 }
326}
327
328static void s390_cpu_finalize(Object *obj)
329{
330#if !defined(CONFIG_USER_ONLY)
331 S390CPU *cpu = S390_CPU(obj);
332
333 qemu_unregister_reset(s390_cpu_machine_reset_cb, cpu);
334 g_free(cpu->irqstate);
335#endif
336}
337
338#if !defined(CONFIG_USER_ONLY)
339static bool disabled_wait(CPUState *cpu)
340{
341 return cpu->halted && !(S390_CPU(cpu)->env.psw.mask &
342 (PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK));
343}
344
345static unsigned s390_count_running_cpus(void)
346{
347 CPUState *cpu;
348 int nr_running = 0;
349
350 CPU_FOREACH(cpu) {
351 uint8_t state = S390_CPU(cpu)->env.cpu_state;
352 if (state == CPU_STATE_OPERATING ||
353 state == CPU_STATE_LOAD) {
354 if (!disabled_wait(cpu)) {
355 nr_running++;
356 }
357 }
358 }
359
360 return nr_running;
361}
362
363unsigned int s390_cpu_halt(S390CPU *cpu)
364{
365 CPUState *cs = CPU(cpu);
366 trace_cpu_halt(cs->cpu_index);
367
368 if (!cs->halted) {
369 cs->halted = 1;
370 cs->exception_index = EXCP_HLT;
371 }
372
373 return s390_count_running_cpus();
374}
375
376void s390_cpu_unhalt(S390CPU *cpu)
377{
378 CPUState *cs = CPU(cpu);
379 trace_cpu_unhalt(cs->cpu_index);
380
381 if (cs->halted) {
382 cs->halted = 0;
383 cs->exception_index = -1;
384 }
385}
386
387unsigned int s390_cpu_set_state(uint8_t cpu_state, S390CPU *cpu)
388 {
389 trace_cpu_set_state(CPU(cpu)->cpu_index, cpu_state);
390
391 switch (cpu_state) {
392 case CPU_STATE_STOPPED:
393 case CPU_STATE_CHECK_STOP:
394
395 s390_cpu_halt(cpu);
396 break;
397 case CPU_STATE_OPERATING:
398 case CPU_STATE_LOAD:
399
400 s390_cpu_unhalt(cpu);
401 break;
402 default:
403 error_report("Requested CPU state is not a valid S390 CPU state: %u",
404 cpu_state);
405 exit(1);
406 }
407 if (kvm_enabled() && cpu->env.cpu_state != cpu_state) {
408 kvm_s390_set_cpu_state(cpu, cpu_state);
409 }
410 cpu->env.cpu_state = cpu_state;
411
412 return s390_count_running_cpus();
413}
414#endif
415
416static gchar *s390_gdb_arch_name(CPUState *cs)
417{
418 return g_strdup("s390:64-bit");
419}
420
421static void s390_cpu_class_init(ObjectClass *oc, void *data)
422{
423 S390CPUClass *scc = S390_CPU_CLASS(oc);
424 CPUClass *cc = CPU_CLASS(scc);
425 DeviceClass *dc = DEVICE_CLASS(oc);
426
427 scc->next_cpu_id = 0;
428 scc->parent_realize = dc->realize;
429 dc->realize = s390_cpu_realizefn;
430
431 scc->parent_reset = cc->reset;
432#if !defined(CONFIG_USER_ONLY)
433 scc->load_normal = s390_cpu_load_normal;
434#endif
435 scc->cpu_reset = s390_cpu_reset;
436 scc->initial_cpu_reset = s390_cpu_initial_reset;
437 cc->reset = s390_cpu_full_reset;
438 cc->has_work = s390_cpu_has_work;
439 cc->do_interrupt = s390_cpu_do_interrupt;
440 cc->dump_state = s390_cpu_dump_state;
441 cc->set_pc = s390_cpu_set_pc;
442 cc->gdb_read_register = s390_cpu_gdb_read_register;
443 cc->gdb_write_register = s390_cpu_gdb_write_register;
444#ifdef CONFIG_USER_ONLY
445 cc->handle_mmu_fault = s390_cpu_handle_mmu_fault;
446#else
447 cc->get_phys_page_debug = s390_cpu_get_phys_page_debug;
448 cc->vmsd = &vmstate_s390_cpu;
449 cc->write_elf64_note = s390_cpu_write_elf64_note;
450 cc->cpu_exec_interrupt = s390_cpu_exec_interrupt;
451 cc->debug_excp_handler = s390x_cpu_debug_excp_handler;
452#endif
453 cc->disas_set_info = s390_cpu_disas_set_info;
454
455 cc->gdb_num_core_regs = S390_NUM_CORE_REGS;
456 cc->gdb_core_xml_file = "s390x-core64.xml";
457 cc->gdb_arch_name = s390_gdb_arch_name;
458
459
460
461
462
463
464 dc->cannot_destroy_with_object_finalize_yet = true;
465}
466
467static const TypeInfo s390_cpu_type_info = {
468 .name = TYPE_S390_CPU,
469 .parent = TYPE_CPU,
470 .instance_size = sizeof(S390CPU),
471 .instance_init = s390_cpu_initfn,
472 .instance_finalize = s390_cpu_finalize,
473 .abstract = false,
474 .class_size = sizeof(S390CPUClass),
475 .class_init = s390_cpu_class_init,
476};
477
478static void s390_cpu_register_types(void)
479{
480 type_register_static(&s390_cpu_type_info);
481}
482
483type_init(s390_cpu_register_types)
484
