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21#include "qemu/osdep.h"
22#include "qapi/error.h"
23#include "hw/core/cpu.h"
24#include "sysemu/hw_accel.h"
25#include "qemu/notify.h"
26#include "qemu/log.h"
27#include "qemu/main-loop.h"
28#include "exec/log.h"
29#include "exec/cpu-common.h"
30#include "qemu/error-report.h"
31#include "qemu/qemu-print.h"
32#include "sysemu/tcg.h"
33#include "hw/boards.h"
34#include "hw/qdev-properties.h"
35#include "trace/trace-root.h"
36#include "qemu/plugin.h"
37
38CPUState *cpu_by_arch_id(int64_t id)
39{
40 CPUState *cpu;
41
42 CPU_FOREACH(cpu) {
43 CPUClass *cc = CPU_GET_CLASS(cpu);
44
45 if (cc->get_arch_id(cpu) == id) {
46 return cpu;
47 }
48 }
49 return NULL;
50}
51
52bool cpu_exists(int64_t id)
53{
54 return !!cpu_by_arch_id(id);
55}
56
57CPUState *cpu_create(const char *typename)
58{
59 Error *err = NULL;
60 CPUState *cpu = CPU(object_new(typename));
61 if (!qdev_realize(DEVICE(cpu), NULL, &err)) {
62 error_report_err(err);
63 object_unref(OBJECT(cpu));
64 exit(EXIT_FAILURE);
65 }
66 return cpu;
67}
68
69
70
71void cpu_reset_interrupt(CPUState *cpu, int mask)
72{
73 bool need_lock = !qemu_mutex_iothread_locked();
74
75 if (need_lock) {
76 qemu_mutex_lock_iothread();
77 }
78 cpu->interrupt_request &= ~mask;
79 if (need_lock) {
80 qemu_mutex_unlock_iothread();
81 }
82}
83
84void cpu_exit(CPUState *cpu)
85{
86 qatomic_set(&cpu->exit_request, 1);
87
88 smp_wmb();
89 qatomic_set(&cpu->icount_decr_ptr->u16.high, -1);
90}
91
92static int cpu_common_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg)
93{
94 return 0;
95}
96
97static int cpu_common_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg)
98{
99 return 0;
100}
101
102void cpu_dump_state(CPUState *cpu, FILE *f, int flags)
103{
104 CPUClass *cc = CPU_GET_CLASS(cpu);
105
106 if (cc->dump_state) {
107 cpu_synchronize_state(cpu);
108 cc->dump_state(cpu, f, flags);
109 }
110}
111
112void cpu_reset(CPUState *cpu)
113{
114 device_cold_reset(DEVICE(cpu));
115
116 trace_guest_cpu_reset(cpu);
117}
118
119static void cpu_common_reset(DeviceState *dev)
120{
121 CPUState *cpu = CPU(dev);
122 CPUClass *cc = CPU_GET_CLASS(cpu);
123
124 if (qemu_loglevel_mask(CPU_LOG_RESET)) {
125 qemu_log("CPU Reset (CPU %d)\n", cpu->cpu_index);
126 log_cpu_state(cpu, cc->reset_dump_flags);
127 }
128
129 cpu->interrupt_request = 0;
130 cpu->halted = cpu->start_powered_off;
131 cpu->mem_io_pc = 0;
132 cpu->icount_extra = 0;
133 qatomic_set(&cpu->icount_decr_ptr->u32, 0);
134 cpu->can_do_io = 1;
135 cpu->exception_index = -1;
136 cpu->crash_occurred = false;
137 cpu->cflags_next_tb = -1;
138
139 if (tcg_enabled()) {
140 cpu_tb_jmp_cache_clear(cpu);
141
142 tcg_flush_softmmu_tlb(cpu);
143 }
144}
145
146static bool cpu_common_has_work(CPUState *cs)
147{
148 return false;
149}
150
151ObjectClass *cpu_class_by_name(const char *typename, const char *cpu_model)
152{
153 CPUClass *cc = CPU_CLASS(object_class_by_name(typename));
154
155 assert(cpu_model && cc->class_by_name);
156 return cc->class_by_name(cpu_model);
157}
158
159static void cpu_common_parse_features(const char *typename, char *features,
160 Error **errp)
161{
162 char *val;
163 static bool cpu_globals_initialized;
164
165 char *featurestr = features ? strtok(features, ",") : NULL;
166
167
168 assert(!cpu_globals_initialized);
169 cpu_globals_initialized = true;
170
171 while (featurestr) {
172 val = strchr(featurestr, '=');
173 if (val) {
174 GlobalProperty *prop = g_new0(typeof(*prop), 1);
175 *val = 0;
176 val++;
177 prop->driver = typename;
178 prop->property = g_strdup(featurestr);
179 prop->value = g_strdup(val);
180 qdev_prop_register_global(prop);
181 } else {
182 error_setg(errp, "Expected key=value format, found %s.",
183 featurestr);
184 return;
185 }
186 featurestr = strtok(NULL, ",");
187 }
188}
189
190static void cpu_common_realizefn(DeviceState *dev, Error **errp)
191{
192 CPUState *cpu = CPU(dev);
193 Object *machine = qdev_get_machine();
194
195
196
197
198
199 if (object_dynamic_cast(machine, TYPE_MACHINE)) {
200 ObjectClass *oc = object_get_class(machine);
201 MachineClass *mc = MACHINE_CLASS(oc);
202
203 if (mc) {
204 cpu->ignore_memory_transaction_failures =
205 mc->ignore_memory_transaction_failures;
206 }
207 }
208
209 if (dev->hotplugged) {
210 cpu_synchronize_post_init(cpu);
211 cpu_resume(cpu);
212 }
213
214
215 trace_init_vcpu(cpu);
216}
217
218static void cpu_common_unrealizefn(DeviceState *dev)
219{
220 CPUState *cpu = CPU(dev);
221
222
223 trace_fini_vcpu(cpu);
224 cpu_exec_unrealizefn(cpu);
225}
226
227static void cpu_common_initfn(Object *obj)
228{
229 CPUState *cpu = CPU(obj);
230 CPUClass *cc = CPU_GET_CLASS(obj);
231
232 cpu->cpu_index = UNASSIGNED_CPU_INDEX;
233 cpu->cluster_index = UNASSIGNED_CLUSTER_INDEX;
234 cpu->gdb_num_regs = cpu->gdb_num_g_regs = cc->gdb_num_core_regs;
235
236
237 cpu->nr_cores = 1;
238 cpu->nr_threads = 1;
239
240 qemu_mutex_init(&cpu->work_mutex);
241 QSIMPLEQ_INIT(&cpu->work_list);
242 QTAILQ_INIT(&cpu->breakpoints);
243 QTAILQ_INIT(&cpu->watchpoints);
244
245 cpu_exec_initfn(cpu);
246}
247
248static void cpu_common_finalize(Object *obj)
249{
250 CPUState *cpu = CPU(obj);
251
252 qemu_mutex_destroy(&cpu->work_mutex);
253}
254
255static int64_t cpu_common_get_arch_id(CPUState *cpu)
256{
257 return cpu->cpu_index;
258}
259
260static void cpu_class_init(ObjectClass *klass, void *data)
261{
262 DeviceClass *dc = DEVICE_CLASS(klass);
263 CPUClass *k = CPU_CLASS(klass);
264
265 k->parse_features = cpu_common_parse_features;
266 k->get_arch_id = cpu_common_get_arch_id;
267 k->has_work = cpu_common_has_work;
268 k->gdb_read_register = cpu_common_gdb_read_register;
269 k->gdb_write_register = cpu_common_gdb_write_register;
270 set_bit(DEVICE_CATEGORY_CPU, dc->categories);
271 dc->realize = cpu_common_realizefn;
272 dc->unrealize = cpu_common_unrealizefn;
273 dc->reset = cpu_common_reset;
274 cpu_class_init_props(dc);
275
276
277
278
279 dc->user_creatable = false;
280}
281
282static const TypeInfo cpu_type_info = {
283 .name = TYPE_CPU,
284 .parent = TYPE_DEVICE,
285 .instance_size = sizeof(CPUState),
286 .instance_init = cpu_common_initfn,
287 .instance_finalize = cpu_common_finalize,
288 .abstract = true,
289 .class_size = sizeof(CPUClass),
290 .class_init = cpu_class_init,
291};
292
293static void cpu_register_types(void)
294{
295 type_register_static(&cpu_type_info);
296}
297
298type_init(cpu_register_types)
299