qom/cpu.c

   1 /*
   2  * QEMU CPU model
   3  *
   4  * Copyright (c) 2012 SUSE LINUX Products GmbH
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see
  18  * <http://www.gnu.org/licenses/gpl-2.0.html>
  19  */
  20
  21 #include "qemu-common.h"
  22 #include "qom/cpu.h"
  23 #include "sysemu/kvm.h"
  24 #include "qemu/notify.h"
  25 #include "qemu/log.h"
  26 #include "sysemu/sysemu.h"
  27
  28 bool cpu_exists(int64_t id)
  29 {
  30     CPUState *cpu;
  31
  32     CPU_FOREACH(cpu) {
  33         CPUClass *cc = CPU_GET_CLASS(cpu);
  34
  35         if (cc->get_arch_id(cpu) == id) {
  36             return true;
  37         }
  38     }
  39     return false;
  40 }
  41
  42 bool cpu_paging_enabled(const CPUState *cpu)
  43 {
  44     CPUClass *cc = CPU_GET_CLASS(cpu);
  45
  46     return cc->get_paging_enabled(cpu);
  47 }
  48
  49 static bool cpu_common_get_paging_enabled(const CPUState *cpu)
  50 {
  51     return false;
  52 }
  53
  54 void cpu_get_memory_mapping(CPUState *cpu, MemoryMappingList *list,
  55                             Error **errp)
  56 {
  57     CPUClass *cc = CPU_GET_CLASS(cpu);
  58
  59     return cc->get_memory_mapping(cpu, list, errp);
  60 }
  61
  62 static void cpu_common_get_memory_mapping(CPUState *cpu,
  63                                           MemoryMappingList *list,
  64                                           Error **errp)
  65 {
  66     error_setg(errp, "Obtaining memory mappings is unsupported on this CPU.");
  67 }
  68
  69 /* CPU hot-plug notifiers */
  70 static NotifierList cpu_added_notifiers =
  71     NOTIFIER_LIST_INITIALIZER(cpu_add_notifiers);
  72
  73 void qemu_register_cpu_added_notifier(Notifier *notifier)
  74 {
  75     notifier_list_add(&cpu_added_notifiers, notifier);
  76 }
  77
  78 void cpu_reset_interrupt(CPUState *cpu, int mask)
  79 {
  80     cpu->interrupt_request &= ~mask;
  81 }
  82
  83 void cpu_exit(CPUState *cpu)
  84 {
  85     cpu->exit_request = 1;
  86     cpu->tcg_exit_req = 1;
  87 }
  88
  89 int cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
  90                              void *opaque)
  91 {
  92     CPUClass *cc = CPU_GET_CLASS(cpu);
  93
  94     return (*cc->write_elf32_qemunote)(f, cpu, opaque);
  95 }
  96
  97 static int cpu_common_write_elf32_qemunote(WriteCoreDumpFunction f,
  98                                            CPUState *cpu, void *opaque)
  99 {
 100     return -1;
 101 }
 102
 103 int cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cpu,
 104                          int cpuid, void *opaque)
 105 {
 106     CPUClass *cc = CPU_GET_CLASS(cpu);
 107
 108     return (*cc->write_elf32_note)(f, cpu, cpuid, opaque);
 109 }
 110
 111 static int cpu_common_write_elf32_note(WriteCoreDumpFunction f,
 112                                        CPUState *cpu, int cpuid,
 113                                        void *opaque)
 114 {
 115     return -1;
 116 }
 117
 118 int cpu_write_elf64_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
 119                              void *opaque)
 120 {
 121     CPUClass *cc = CPU_GET_CLASS(cpu);
 122
 123     return (*cc->write_elf64_qemunote)(f, cpu, opaque);
 124 }
 125
 126 static int cpu_common_write_elf64_qemunote(WriteCoreDumpFunction f,
 127                                            CPUState *cpu, void *opaque)
 128 {
 129     return -1;
 130 }
 131
 132 int cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cpu,
 133                          int cpuid, void *opaque)
 134 {
 135     CPUClass *cc = CPU_GET_CLASS(cpu);
 136
 137     return (*cc->write_elf64_note)(f, cpu, cpuid, opaque);
 138 }
 139
 140 static int cpu_common_write_elf64_note(WriteCoreDumpFunction f,
 141                                        CPUState *cpu, int cpuid,
 142                                        void *opaque)
 143 {
 144     return -1;
 145 }
 146
 147
 148 static int cpu_common_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg)
 149 {
 150     return 0;
 151 }
 152
 153 static int cpu_common_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg)
 154 {
 155     return 0;
 156 }
 157
 158
 159 void cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
 160                     int flags)
 161 {
 162     CPUClass *cc = CPU_GET_CLASS(cpu);
 163
 164     if (cc->dump_state) {
 165         cpu_synchronize_state(cpu);
 166         cc->dump_state(cpu, f, cpu_fprintf, flags);
 167     }
 168 }
 169
 170 void cpu_dump_statistics(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
 171                          int flags)
 172 {
 173     CPUClass *cc = CPU_GET_CLASS(cpu);
 174
 175     if (cc->dump_statistics) {
 176         cc->dump_statistics(cpu, f, cpu_fprintf, flags);
 177     }
 178 }
 179
 180 void cpu_reset(CPUState *cpu)
 181 {
 182     CPUClass *klass = CPU_GET_CLASS(cpu);
 183
 184     if (klass->reset != NULL) {
 185         (*klass->reset)(cpu);
 186     }
 187 }
 188
 189 static void cpu_common_reset(CPUState *cpu)
 190 {
 191     CPUClass *cc = CPU_GET_CLASS(cpu);
 192
 193     if (qemu_loglevel_mask(CPU_LOG_RESET)) {
 194         qemu_log("CPU Reset (CPU %d)\n", cpu->cpu_index);
 195         log_cpu_state(cpu, cc->reset_dump_flags);
 196     }
 197
 198     cpu->interrupt_request = 0;
 199     cpu->current_tb = NULL;
 200     cpu->halted = 0;
 201 }
 202
 203 static bool cpu_common_has_work(CPUState *cs)
 204 {
 205     return false;
 206 }
 207
 208 ObjectClass *cpu_class_by_name(const char *typename, const char *cpu_model)
 209 {
 210     CPUClass *cc = CPU_CLASS(object_class_by_name(typename));
 211
 212     return cc->class_by_name(cpu_model);
 213 }
 214
 215 static ObjectClass *cpu_common_class_by_name(const char *cpu_model)
 216 {
 217     return NULL;
 218 }
 219
 220 static void cpu_common_realizefn(DeviceState *dev, Error **errp)
 221 {
 222     CPUState *cpu = CPU(dev);
 223
 224     if (dev->hotplugged) {
 225         cpu_synchronize_post_init(cpu);
 226         notifier_list_notify(&cpu_added_notifiers, dev);
 227         cpu_resume(cpu);
 228     }
 229 }
 230
 231 static void cpu_common_initfn(Object *obj)
 232 {
 233     CPUState *cpu = CPU(obj);
 234     CPUClass *cc = CPU_GET_CLASS(obj);
 235
 236     cpu->gdb_num_regs = cpu->gdb_num_g_regs = cc->gdb_num_core_regs;
 237 }
 238
 239 static int64_t cpu_common_get_arch_id(CPUState *cpu)
 240 {
 241     return cpu->cpu_index;
 242 }
 243
 244 static void cpu_class_init(ObjectClass *klass, void *data)
 245 {
 246     DeviceClass *dc = DEVICE_CLASS(klass);
 247     CPUClass *k = CPU_CLASS(klass);
 248
 249     k->class_by_name = cpu_common_class_by_name;
 250     k->reset = cpu_common_reset;
 251     k->get_arch_id = cpu_common_get_arch_id;
 252     k->has_work = cpu_common_has_work;
 253     k->get_paging_enabled = cpu_common_get_paging_enabled;
 254     k->get_memory_mapping = cpu_common_get_memory_mapping;
 255     k->write_elf32_qemunote = cpu_common_write_elf32_qemunote;
 256     k->write_elf32_note = cpu_common_write_elf32_note;
 257     k->write_elf64_qemunote = cpu_common_write_elf64_qemunote;
 258     k->write_elf64_note = cpu_common_write_elf64_note;
 259     k->gdb_read_register = cpu_common_gdb_read_register;
 260     k->gdb_write_register = cpu_common_gdb_write_register;
 261     dc->realize = cpu_common_realizefn;
 262     /*
 263      * Reason: CPUs still need special care by board code: wiring up
 264      * IRQs, adding reset handlers, halting non-first CPUs, ...
 265      */
 266     dc->cannot_instantiate_with_device_add_yet = true;
 267 }
 268
 269 static const TypeInfo cpu_type_info = {
 270     .name = TYPE_CPU,
 271     .parent = TYPE_DEVICE,
 272     .instance_size = sizeof(CPUState),
 273     .instance_init = cpu_common_initfn,
 274     .abstract = true,
 275     .class_size = sizeof(CPUClass),
 276     .class_init = cpu_class_init,
 277 };
 278
 279 static void cpu_register_types(void)
 280 {
 281     type_register_static(&cpu_type_info);
 282 }
 283
 284 type_init(cpu_register_types)