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 "sysemu/sysemu.h"
  26
  27 typedef struct CPUExistsArgs {
  28     int64_t id;
  29     bool found;
  30 } CPUExistsArgs;
  31
  32 static void cpu_exist_cb(CPUState *cpu, void *data)
  33 {
  34     CPUClass *klass = CPU_GET_CLASS(cpu);
  35     CPUExistsArgs *arg = data;
  36
  37     if (klass->get_arch_id(cpu) == arg->id) {
  38         arg->found = true;
  39     }
  40 }
  41
  42 bool cpu_exists(int64_t id)
  43 {
  44     CPUExistsArgs data = {
  45         .id = id,
  46         .found = false,
  47     };
  48
  49     qemu_for_each_cpu(cpu_exist_cb, &data);
  50     return data.found;
  51 }
  52
  53 bool cpu_paging_enabled(const CPUState *cpu)
  54 {
  55     CPUClass *cc = CPU_GET_CLASS(cpu);
  56
  57     return cc->get_paging_enabled(cpu);
  58 }
  59
  60 static bool cpu_common_get_paging_enabled(const CPUState *cpu)
  61 {
  62     return false;
  63 }
  64
  65 void cpu_get_memory_mapping(CPUState *cpu, MemoryMappingList *list,
  66                             Error **errp)
  67 {
  68     CPUClass *cc = CPU_GET_CLASS(cpu);
  69
  70     return cc->get_memory_mapping(cpu, list, errp);
  71 }
  72
  73 static void cpu_common_get_memory_mapping(CPUState *cpu,
  74                                           MemoryMappingList *list,
  75                                           Error **errp)
  76 {
  77     error_setg(errp, "Obtaining memory mappings is unsupported on this CPU.");
  78 }
  79
  80 /* CPU hot-plug notifiers */
  81 static NotifierList cpu_added_notifiers =
  82     NOTIFIER_LIST_INITIALIZER(cpu_add_notifiers);
  83
  84 void qemu_register_cpu_added_notifier(Notifier *notifier)
  85 {
  86     notifier_list_add(&cpu_added_notifiers, notifier);
  87 }
  88
  89 void cpu_reset_interrupt(CPUState *cpu, int mask)
  90 {
  91     cpu->interrupt_request &= ~mask;
  92 }
  93
  94 void cpu_exit(CPUState *cpu)
  95 {
  96     cpu->exit_request = 1;
  97     cpu->tcg_exit_req = 1;
  98 }
  99
 100 int cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
 101                              void *opaque)
 102 {
 103     CPUClass *cc = CPU_GET_CLASS(cpu);
 104
 105     return (*cc->write_elf32_qemunote)(f, cpu, opaque);
 106 }
 107
 108 static int cpu_common_write_elf32_qemunote(WriteCoreDumpFunction f,
 109                                            CPUState *cpu, void *opaque)
 110 {
 111     return -1;
 112 }
 113
 114 int cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cpu,
 115                          int cpuid, void *opaque)
 116 {
 117     CPUClass *cc = CPU_GET_CLASS(cpu);
 118
 119     return (*cc->write_elf32_note)(f, cpu, cpuid, opaque);
 120 }
 121
 122 static int cpu_common_write_elf32_note(WriteCoreDumpFunction f,
 123                                        CPUState *cpu, int cpuid,
 124                                        void *opaque)
 125 {
 126     return -1;
 127 }
 128
 129 int cpu_write_elf64_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
 130                              void *opaque)
 131 {
 132     CPUClass *cc = CPU_GET_CLASS(cpu);
 133
 134     return (*cc->write_elf64_qemunote)(f, cpu, opaque);
 135 }
 136
 137 static int cpu_common_write_elf64_qemunote(WriteCoreDumpFunction f,
 138                                            CPUState *cpu, void *opaque)
 139 {
 140     return -1;
 141 }
 142
 143 int cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cpu,
 144                          int cpuid, void *opaque)
 145 {
 146     CPUClass *cc = CPU_GET_CLASS(cpu);
 147
 148     return (*cc->write_elf64_note)(f, cpu, cpuid, opaque);
 149 }
 150
 151 static int cpu_common_write_elf64_note(WriteCoreDumpFunction f,
 152                                        CPUState *cpu, int cpuid,
 153                                        void *opaque)
 154 {
 155     return -1;
 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         cc->dump_state(cpu, f, cpu_fprintf, flags);
 166     }
 167 }
 168
 169 void cpu_dump_statistics(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
 170                          int flags)
 171 {
 172     CPUClass *cc = CPU_GET_CLASS(cpu);
 173
 174     if (cc->dump_statistics) {
 175         cc->dump_statistics(cpu, f, cpu_fprintf, flags);
 176     }
 177 }
 178
 179 void cpu_reset(CPUState *cpu)
 180 {
 181     CPUClass *klass = CPU_GET_CLASS(cpu);
 182
 183     if (klass->reset != NULL) {
 184         (*klass->reset)(cpu);
 185     }
 186 }
 187
 188 static void cpu_common_reset(CPUState *cpu)
 189 {
 190     cpu->exit_request = 0;
 191     cpu->interrupt_request = 0;
 192     cpu->current_tb = NULL;
 193     cpu->halted = 0;
 194 }
 195
 196 ObjectClass *cpu_class_by_name(const char *typename, const char *cpu_model)
 197 {
 198     CPUClass *cc = CPU_CLASS(object_class_by_name(typename));
 199
 200     return cc->class_by_name(cpu_model);
 201 }
 202
 203 static ObjectClass *cpu_common_class_by_name(const char *cpu_model)
 204 {
 205     return NULL;
 206 }
 207
 208 static void cpu_common_realizefn(DeviceState *dev, Error **errp)
 209 {
 210     CPUState *cpu = CPU(dev);
 211
 212     qemu_init_vcpu(cpu);
 213
 214     if (dev->hotplugged) {
 215         cpu_synchronize_post_init(cpu);
 216         notifier_list_notify(&cpu_added_notifiers, dev);
 217         cpu_resume(cpu);
 218     }
 219 }
 220
 221 static int64_t cpu_common_get_arch_id(CPUState *cpu)
 222 {
 223     return cpu->cpu_index;
 224 }
 225
 226 static void cpu_class_init(ObjectClass *klass, void *data)
 227 {
 228     DeviceClass *dc = DEVICE_CLASS(klass);
 229     CPUClass *k = CPU_CLASS(klass);
 230
 231     k->class_by_name = cpu_common_class_by_name;
 232     k->reset = cpu_common_reset;
 233     k->get_arch_id = cpu_common_get_arch_id;
 234     k->get_paging_enabled = cpu_common_get_paging_enabled;
 235     k->get_memory_mapping = cpu_common_get_memory_mapping;
 236     k->write_elf32_qemunote = cpu_common_write_elf32_qemunote;
 237     k->write_elf32_note = cpu_common_write_elf32_note;
 238     k->write_elf64_qemunote = cpu_common_write_elf64_qemunote;
 239     k->write_elf64_note = cpu_common_write_elf64_note;
 240     dc->realize = cpu_common_realizefn;
 241     dc->no_user = 1;
 242 }
 243
 244 static const TypeInfo cpu_type_info = {
 245     .name = TYPE_CPU,
 246     .parent = TYPE_DEVICE,
 247     .instance_size = sizeof(CPUState),
 248     .abstract = true,
 249     .class_size = sizeof(CPUClass),
 250     .class_init = cpu_class_init,
 251 };
 252
 253 static void cpu_register_types(void)
 254 {
 255     type_register_static(&cpu_type_info);
 256 }
 257
 258 type_init(cpu_register_types)