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 typedef struct CPUExistsArgs {
  29     int64_t id;
  30     bool found;
  31 } CPUExistsArgs;
  32
  33 static void cpu_exist_cb(CPUState *cpu, void *data)
  34 {
  35     CPUClass *klass = CPU_GET_CLASS(cpu);
  36     CPUExistsArgs *arg = data;
  37
  38     if (klass->get_arch_id(cpu) == arg->id) {
  39         arg->found = true;
  40     }
  41 }
  42
  43 bool cpu_exists(int64_t id)
  44 {
  45     CPUExistsArgs data = {
  46         .id = id,
  47         .found = false,
  48     };
  49
  50     qemu_for_each_cpu(cpu_exist_cb, &data);
  51     return data.found;
  52 }
  53
  54 bool cpu_paging_enabled(const CPUState *cpu)
  55 {
  56     CPUClass *cc = CPU_GET_CLASS(cpu);
  57
  58     return cc->get_paging_enabled(cpu);
  59 }
  60
  61 static bool cpu_common_get_paging_enabled(const CPUState *cpu)
  62 {
  63     return false;
  64 }
  65
  66 void cpu_get_memory_mapping(CPUState *cpu, MemoryMappingList *list,
  67                             Error **errp)
  68 {
  69     CPUClass *cc = CPU_GET_CLASS(cpu);
  70
  71     return cc->get_memory_mapping(cpu, list, errp);
  72 }
  73
  74 static void cpu_common_get_memory_mapping(CPUState *cpu,
  75                                           MemoryMappingList *list,
  76                                           Error **errp)
  77 {
  78     error_setg(errp, "Obtaining memory mappings is unsupported on this CPU.");
  79 }
  80
  81 /* CPU hot-plug notifiers */
  82 static NotifierList cpu_added_notifiers =
  83     NOTIFIER_LIST_INITIALIZER(cpu_add_notifiers);
  84
  85 void qemu_register_cpu_added_notifier(Notifier *notifier)
  86 {
  87     notifier_list_add(&cpu_added_notifiers, notifier);
  88 }
  89
  90 void cpu_reset_interrupt(CPUState *cpu, int mask)
  91 {
  92     cpu->interrupt_request &= ~mask;
  93 }
  94
  95 void cpu_exit(CPUState *cpu)
  96 {
  97     cpu->exit_request = 1;
  98     cpu->tcg_exit_req = 1;
  99 }
 100
 101 int cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
 102                              void *opaque)
 103 {
 104     CPUClass *cc = CPU_GET_CLASS(cpu);
 105
 106     return (*cc->write_elf32_qemunote)(f, cpu, opaque);
 107 }
 108
 109 static int cpu_common_write_elf32_qemunote(WriteCoreDumpFunction f,
 110                                            CPUState *cpu, void *opaque)
 111 {
 112     return -1;
 113 }
 114
 115 int cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cpu,
 116                          int cpuid, void *opaque)
 117 {
 118     CPUClass *cc = CPU_GET_CLASS(cpu);
 119
 120     return (*cc->write_elf32_note)(f, cpu, cpuid, opaque);
 121 }
 122
 123 static int cpu_common_write_elf32_note(WriteCoreDumpFunction f,
 124                                        CPUState *cpu, int cpuid,
 125                                        void *opaque)
 126 {
 127     return -1;
 128 }
 129
 130 int cpu_write_elf64_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
 131                              void *opaque)
 132 {
 133     CPUClass *cc = CPU_GET_CLASS(cpu);
 134
 135     return (*cc->write_elf64_qemunote)(f, cpu, opaque);
 136 }
 137
 138 static int cpu_common_write_elf64_qemunote(WriteCoreDumpFunction f,
 139                                            CPUState *cpu, void *opaque)
 140 {
 141     return -1;
 142 }
 143
 144 int cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cpu,
 145                          int cpuid, void *opaque)
 146 {
 147     CPUClass *cc = CPU_GET_CLASS(cpu);
 148
 149     return (*cc->write_elf64_note)(f, cpu, cpuid, opaque);
 150 }
 151
 152 static int cpu_common_write_elf64_note(WriteCoreDumpFunction f,
 153                                        CPUState *cpu, int cpuid,
 154                                        void *opaque)
 155 {
 156     return -1;
 157 }
 158
 159
 160 void cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
 161                     int flags)
 162 {
 163     CPUClass *cc = CPU_GET_CLASS(cpu);
 164
 165     if (cc->dump_state) {
 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->exit_request = 0;
 199     cpu->interrupt_request = 0;
 200     cpu->current_tb = NULL;
 201     cpu->halted = 0;
 202 }
 203
 204 ObjectClass *cpu_class_by_name(const char *typename, const char *cpu_model)
 205 {
 206     CPUClass *cc = CPU_CLASS(object_class_by_name(typename));
 207
 208     return cc->class_by_name(cpu_model);
 209 }
 210
 211 static ObjectClass *cpu_common_class_by_name(const char *cpu_model)
 212 {
 213     return NULL;
 214 }
 215
 216 static void cpu_common_realizefn(DeviceState *dev, Error **errp)
 217 {
 218     CPUState *cpu = CPU(dev);
 219
 220     qemu_init_vcpu(cpu);
 221
 222     if (dev->hotplugged) {
 223         cpu_synchronize_post_init(cpu);
 224         notifier_list_notify(&cpu_added_notifiers, dev);
 225         cpu_resume(cpu);
 226     }
 227 }
 228
 229 static int64_t cpu_common_get_arch_id(CPUState *cpu)
 230 {
 231     return cpu->cpu_index;
 232 }
 233
 234 static void cpu_class_init(ObjectClass *klass, void *data)
 235 {
 236     DeviceClass *dc = DEVICE_CLASS(klass);
 237     CPUClass *k = CPU_CLASS(klass);
 238
 239     k->class_by_name = cpu_common_class_by_name;
 240     k->reset = cpu_common_reset;
 241     k->get_arch_id = cpu_common_get_arch_id;
 242     k->get_paging_enabled = cpu_common_get_paging_enabled;
 243     k->get_memory_mapping = cpu_common_get_memory_mapping;
 244     k->write_elf32_qemunote = cpu_common_write_elf32_qemunote;
 245     k->write_elf32_note = cpu_common_write_elf32_note;
 246     k->write_elf64_qemunote = cpu_common_write_elf64_qemunote;
 247     k->write_elf64_note = cpu_common_write_elf64_note;
 248     dc->realize = cpu_common_realizefn;
 249     dc->no_user = 1;
 250 }
 251
 252 static const TypeInfo cpu_type_info = {
 253     .name = TYPE_CPU,
 254     .parent = TYPE_DEVICE,
 255     .instance_size = sizeof(CPUState),
 256     .abstract = true,
 257     .class_size = sizeof(CPUClass),
 258     .class_init = cpu_class_init,
 259 };
 260
 261 static void cpu_register_types(void)
 262 {
 263     type_register_static(&cpu_type_info);
 264 }
 265
 266 type_init(cpu_register_types)