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 /* CPU hot-plug notifiers */
  54 static NotifierList cpu_added_notifiers =
  55     NOTIFIER_LIST_INITIALIZER(cpu_add_notifiers);
  56
  57 void qemu_register_cpu_added_notifier(Notifier *notifier)
  58 {
  59     notifier_list_add(&cpu_added_notifiers, notifier);
  60 }
  61
  62 void cpu_reset_interrupt(CPUState *cpu, int mask)
  63 {
  64     cpu->interrupt_request &= ~mask;
  65 }
  66
  67 int cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
  68                              void *opaque)
  69 {
  70     CPUClass *cc = CPU_GET_CLASS(cpu);
  71
  72     return (*cc->write_elf32_qemunote)(f, cpu, opaque);
  73 }
  74
  75 static int cpu_common_write_elf32_qemunote(WriteCoreDumpFunction f,
  76                                            CPUState *cpu, void *opaque)
  77 {
  78     return -1;
  79 }
  80
  81 int cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cpu,
  82                          int cpuid, void *opaque)
  83 {
  84     CPUClass *cc = CPU_GET_CLASS(cpu);
  85
  86     return (*cc->write_elf32_note)(f, cpu, cpuid, opaque);
  87 }
  88
  89 static int cpu_common_write_elf32_note(WriteCoreDumpFunction f,
  90                                        CPUState *cpu, int cpuid,
  91                                        void *opaque)
  92 {
  93     return -1;
  94 }
  95
  96 int cpu_write_elf64_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
  97                              void *opaque)
  98 {
  99     CPUClass *cc = CPU_GET_CLASS(cpu);
 100
 101     return (*cc->write_elf64_qemunote)(f, cpu, opaque);
 102 }
 103
 104 static int cpu_common_write_elf64_qemunote(WriteCoreDumpFunction f,
 105                                            CPUState *cpu, void *opaque)
 106 {
 107     return -1;
 108 }
 109
 110 int cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cpu,
 111                          int cpuid, void *opaque)
 112 {
 113     CPUClass *cc = CPU_GET_CLASS(cpu);
 114
 115     return (*cc->write_elf64_note)(f, cpu, cpuid, opaque);
 116 }
 117
 118 static int cpu_common_write_elf64_note(WriteCoreDumpFunction f,
 119                                        CPUState *cpu, int cpuid,
 120                                        void *opaque)
 121 {
 122     return -1;
 123 }
 124
 125
 126 void cpu_reset(CPUState *cpu)
 127 {
 128     CPUClass *klass = CPU_GET_CLASS(cpu);
 129
 130     if (klass->reset != NULL) {
 131         (*klass->reset)(cpu);
 132     }
 133 }
 134
 135 static void cpu_common_reset(CPUState *cpu)
 136 {
 137     cpu->exit_request = 0;
 138     cpu->interrupt_request = 0;
 139     cpu->current_tb = NULL;
 140     cpu->halted = 0;
 141 }
 142
 143 ObjectClass *cpu_class_by_name(const char *typename, const char *cpu_model)
 144 {
 145     CPUClass *cc = CPU_CLASS(object_class_by_name(typename));
 146
 147     return cc->class_by_name(cpu_model);
 148 }
 149
 150 static ObjectClass *cpu_common_class_by_name(const char *cpu_model)
 151 {
 152     return NULL;
 153 }
 154
 155 static void cpu_common_realizefn(DeviceState *dev, Error **errp)
 156 {
 157     CPUState *cpu = CPU(dev);
 158
 159     if (dev->hotplugged) {
 160         cpu_synchronize_post_init(cpu);
 161         notifier_list_notify(&cpu_added_notifiers, dev);
 162         cpu_resume(cpu);
 163     }
 164 }
 165
 166 static int64_t cpu_common_get_arch_id(CPUState *cpu)
 167 {
 168     return cpu->cpu_index;
 169 }
 170
 171 static void cpu_class_init(ObjectClass *klass, void *data)
 172 {
 173     DeviceClass *dc = DEVICE_CLASS(klass);
 174     CPUClass *k = CPU_CLASS(klass);
 175
 176     k->class_by_name = cpu_common_class_by_name;
 177     k->reset = cpu_common_reset;
 178     k->get_arch_id = cpu_common_get_arch_id;
 179     k->write_elf32_qemunote = cpu_common_write_elf32_qemunote;
 180     k->write_elf32_note = cpu_common_write_elf32_note;
 181     k->write_elf64_qemunote = cpu_common_write_elf64_qemunote;
 182     k->write_elf64_note = cpu_common_write_elf64_note;
 183     dc->realize = cpu_common_realizefn;
 184     dc->no_user = 1;
 185 }
 186
 187 static const TypeInfo cpu_type_info = {
 188     .name = TYPE_CPU,
 189     .parent = TYPE_DEVICE,
 190     .instance_size = sizeof(CPUState),
 191     .abstract = true,
 192     .class_size = sizeof(CPUClass),
 193     .class_init = cpu_class_init,
 194 };
 195
 196 static void cpu_register_types(void)
 197 {
 198     type_register_static(&cpu_type_info);
 199 }
 200
 201 type_init(cpu_register_types)