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 "qom/cpu.h"
  22 #include "qemu-common.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 int cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
  95                              void *opaque)
  96 {
  97     CPUClass *cc = CPU_GET_CLASS(cpu);
  98
  99     return (*cc->write_elf32_qemunote)(f, cpu, opaque);
 100 }
 101
 102 static int cpu_common_write_elf32_qemunote(WriteCoreDumpFunction f,
 103                                            CPUState *cpu, void *opaque)
 104 {
 105     return -1;
 106 }
 107
 108 int cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cpu,
 109                          int cpuid, void *opaque)
 110 {
 111     CPUClass *cc = CPU_GET_CLASS(cpu);
 112
 113     return (*cc->write_elf32_note)(f, cpu, cpuid, opaque);
 114 }
 115
 116 static int cpu_common_write_elf32_note(WriteCoreDumpFunction f,
 117                                        CPUState *cpu, int cpuid,
 118                                        void *opaque)
 119 {
 120     return -1;
 121 }
 122
 123 int cpu_write_elf64_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
 124                              void *opaque)
 125 {
 126     CPUClass *cc = CPU_GET_CLASS(cpu);
 127
 128     return (*cc->write_elf64_qemunote)(f, cpu, opaque);
 129 }
 130
 131 static int cpu_common_write_elf64_qemunote(WriteCoreDumpFunction f,
 132                                            CPUState *cpu, void *opaque)
 133 {
 134     return -1;
 135 }
 136
 137 int cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cpu,
 138                          int cpuid, void *opaque)
 139 {
 140     CPUClass *cc = CPU_GET_CLASS(cpu);
 141
 142     return (*cc->write_elf64_note)(f, cpu, cpuid, opaque);
 143 }
 144
 145 static int cpu_common_write_elf64_note(WriteCoreDumpFunction f,
 146                                        CPUState *cpu, int cpuid,
 147                                        void *opaque)
 148 {
 149     return -1;
 150 }
 151
 152
 153 void cpu_reset(CPUState *cpu)
 154 {
 155     CPUClass *klass = CPU_GET_CLASS(cpu);
 156
 157     if (klass->reset != NULL) {
 158         (*klass->reset)(cpu);
 159     }
 160 }
 161
 162 static void cpu_common_reset(CPUState *cpu)
 163 {
 164     cpu->exit_request = 0;
 165     cpu->interrupt_request = 0;
 166     cpu->current_tb = NULL;
 167     cpu->halted = 0;
 168 }
 169
 170 ObjectClass *cpu_class_by_name(const char *typename, const char *cpu_model)
 171 {
 172     CPUClass *cc = CPU_CLASS(object_class_by_name(typename));
 173
 174     return cc->class_by_name(cpu_model);
 175 }
 176
 177 static ObjectClass *cpu_common_class_by_name(const char *cpu_model)
 178 {
 179     return NULL;
 180 }
 181
 182 static void cpu_common_realizefn(DeviceState *dev, Error **errp)
 183 {
 184     CPUState *cpu = CPU(dev);
 185
 186     if (dev->hotplugged) {
 187         cpu_synchronize_post_init(cpu);
 188         notifier_list_notify(&cpu_added_notifiers, dev);
 189         cpu_resume(cpu);
 190     }
 191 }
 192
 193 static int64_t cpu_common_get_arch_id(CPUState *cpu)
 194 {
 195     return cpu->cpu_index;
 196 }
 197
 198 static void cpu_class_init(ObjectClass *klass, void *data)
 199 {
 200     DeviceClass *dc = DEVICE_CLASS(klass);
 201     CPUClass *k = CPU_CLASS(klass);
 202
 203     k->class_by_name = cpu_common_class_by_name;
 204     k->reset = cpu_common_reset;
 205     k->get_arch_id = cpu_common_get_arch_id;
 206     k->get_paging_enabled = cpu_common_get_paging_enabled;
 207     k->get_memory_mapping = cpu_common_get_memory_mapping;
 208     k->write_elf32_qemunote = cpu_common_write_elf32_qemunote;
 209     k->write_elf32_note = cpu_common_write_elf32_note;
 210     k->write_elf64_qemunote = cpu_common_write_elf64_qemunote;
 211     k->write_elf64_note = cpu_common_write_elf64_note;
 212     dc->realize = cpu_common_realizefn;
 213     dc->no_user = 1;
 214 }
 215
 216 static const TypeInfo cpu_type_info = {
 217     .name = TYPE_CPU,
 218     .parent = TYPE_DEVICE,
 219     .instance_size = sizeof(CPUState),
 220     .abstract = true,
 221     .class_size = sizeof(CPUClass),
 222     .class_init = cpu_class_init,
 223 };
 224
 225 static void cpu_register_types(void)
 226 {
 227     type_register_static(&cpu_type_info);
 228 }
 229
 230 type_init(cpu_register_types)