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 true;
  63 }
  64
  65 /* CPU hot-plug notifiers */
  66 static NotifierList cpu_added_notifiers =
  67     NOTIFIER_LIST_INITIALIZER(cpu_add_notifiers);
  68
  69 void qemu_register_cpu_added_notifier(Notifier *notifier)
  70 {
  71     notifier_list_add(&cpu_added_notifiers, notifier);
  72 }
  73
  74 void cpu_reset_interrupt(CPUState *cpu, int mask)
  75 {
  76     cpu->interrupt_request &= ~mask;
  77 }
  78
  79 int cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
  80                              void *opaque)
  81 {
  82     CPUClass *cc = CPU_GET_CLASS(cpu);
  83
  84     return (*cc->write_elf32_qemunote)(f, cpu, opaque);
  85 }
  86
  87 static int cpu_common_write_elf32_qemunote(WriteCoreDumpFunction f,
  88                                            CPUState *cpu, void *opaque)
  89 {
  90     return -1;
  91 }
  92
  93 int cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cpu,
  94                          int cpuid, void *opaque)
  95 {
  96     CPUClass *cc = CPU_GET_CLASS(cpu);
  97
  98     return (*cc->write_elf32_note)(f, cpu, cpuid, opaque);
  99 }
 100
 101 static int cpu_common_write_elf32_note(WriteCoreDumpFunction f,
 102                                        CPUState *cpu, int cpuid,
 103                                        void *opaque)
 104 {
 105     return -1;
 106 }
 107
 108 int cpu_write_elf64_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
 109                              void *opaque)
 110 {
 111     CPUClass *cc = CPU_GET_CLASS(cpu);
 112
 113     return (*cc->write_elf64_qemunote)(f, cpu, opaque);
 114 }
 115
 116 static int cpu_common_write_elf64_qemunote(WriteCoreDumpFunction f,
 117                                            CPUState *cpu, void *opaque)
 118 {
 119     return -1;
 120 }
 121
 122 int cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cpu,
 123                          int cpuid, void *opaque)
 124 {
 125     CPUClass *cc = CPU_GET_CLASS(cpu);
 126
 127     return (*cc->write_elf64_note)(f, cpu, cpuid, opaque);
 128 }
 129
 130 static int cpu_common_write_elf64_note(WriteCoreDumpFunction f,
 131                                        CPUState *cpu, int cpuid,
 132                                        void *opaque)
 133 {
 134     return -1;
 135 }
 136
 137
 138 void cpu_reset(CPUState *cpu)
 139 {
 140     CPUClass *klass = CPU_GET_CLASS(cpu);
 141
 142     if (klass->reset != NULL) {
 143         (*klass->reset)(cpu);
 144     }
 145 }
 146
 147 static void cpu_common_reset(CPUState *cpu)
 148 {
 149     cpu->exit_request = 0;
 150     cpu->interrupt_request = 0;
 151     cpu->current_tb = NULL;
 152     cpu->halted = 0;
 153 }
 154
 155 ObjectClass *cpu_class_by_name(const char *typename, const char *cpu_model)
 156 {
 157     CPUClass *cc = CPU_CLASS(object_class_by_name(typename));
 158
 159     return cc->class_by_name(cpu_model);
 160 }
 161
 162 static ObjectClass *cpu_common_class_by_name(const char *cpu_model)
 163 {
 164     return NULL;
 165 }
 166
 167 static void cpu_common_realizefn(DeviceState *dev, Error **errp)
 168 {
 169     CPUState *cpu = CPU(dev);
 170
 171     if (dev->hotplugged) {
 172         cpu_synchronize_post_init(cpu);
 173         notifier_list_notify(&cpu_added_notifiers, dev);
 174         cpu_resume(cpu);
 175     }
 176 }
 177
 178 static int64_t cpu_common_get_arch_id(CPUState *cpu)
 179 {
 180     return cpu->cpu_index;
 181 }
 182
 183 static void cpu_class_init(ObjectClass *klass, void *data)
 184 {
 185     DeviceClass *dc = DEVICE_CLASS(klass);
 186     CPUClass *k = CPU_CLASS(klass);
 187
 188     k->class_by_name = cpu_common_class_by_name;
 189     k->reset = cpu_common_reset;
 190     k->get_arch_id = cpu_common_get_arch_id;
 191     k->get_paging_enabled = cpu_common_get_paging_enabled;
 192     k->write_elf32_qemunote = cpu_common_write_elf32_qemunote;
 193     k->write_elf32_note = cpu_common_write_elf32_note;
 194     k->write_elf64_qemunote = cpu_common_write_elf64_qemunote;
 195     k->write_elf64_note = cpu_common_write_elf64_note;
 196     dc->realize = cpu_common_realizefn;
 197     dc->no_user = 1;
 198 }
 199
 200 static const TypeInfo cpu_type_info = {
 201     .name = TYPE_CPU,
 202     .parent = TYPE_DEVICE,
 203     .instance_size = sizeof(CPUState),
 204     .abstract = true,
 205     .class_size = sizeof(CPUClass),
 206     .class_init = cpu_class_init,
 207 };
 208
 209 static void cpu_register_types(void)
 210 {
 211     type_register_static(&cpu_type_info);
 212 }
 213
 214 type_init(cpu_register_types)