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 void cpu_reset(CPUState *cpu)
  68 {
  69     CPUClass *klass = CPU_GET_CLASS(cpu);
  70
  71     if (klass->reset != NULL) {
  72         (*klass->reset)(cpu);
  73     }
  74 }
  75
  76 static void cpu_common_reset(CPUState *cpu)
  77 {
  78     cpu->exit_request = 0;
  79     cpu->interrupt_request = 0;
  80     cpu->current_tb = NULL;
  81     cpu->halted = 0;
  82 }
  83
  84 ObjectClass *cpu_class_by_name(const char *typename, const char *cpu_model)
  85 {
  86     CPUClass *cc = CPU_CLASS(object_class_by_name(typename));
  87
  88     return cc->class_by_name(cpu_model);
  89 }
  90
  91 static ObjectClass *cpu_common_class_by_name(const char *cpu_model)
  92 {
  93     return NULL;
  94 }
  95
  96 static void cpu_common_realizefn(DeviceState *dev, Error **errp)
  97 {
  98     CPUState *cpu = CPU(dev);
  99
 100     if (dev->hotplugged) {
 101         cpu_synchronize_post_init(cpu);
 102         notifier_list_notify(&cpu_added_notifiers, dev);
 103         cpu_resume(cpu);
 104     }
 105 }
 106
 107 static int64_t cpu_common_get_arch_id(CPUState *cpu)
 108 {
 109     return cpu->cpu_index;
 110 }
 111
 112 static void cpu_class_init(ObjectClass *klass, void *data)
 113 {
 114     DeviceClass *dc = DEVICE_CLASS(klass);
 115     CPUClass *k = CPU_CLASS(klass);
 116
 117     k->class_by_name = cpu_common_class_by_name;
 118     k->reset = cpu_common_reset;
 119     k->get_arch_id = cpu_common_get_arch_id;
 120     dc->realize = cpu_common_realizefn;
 121     dc->no_user = 1;
 122 }
 123
 124 static const TypeInfo cpu_type_info = {
 125     .name = TYPE_CPU,
 126     .parent = TYPE_DEVICE,
 127     .instance_size = sizeof(CPUState),
 128     .abstract = true,
 129     .class_size = sizeof(CPUClass),
 130     .class_init = cpu_class_init,
 131 };
 132
 133 static void cpu_register_types(void)
 134 {
 135     type_register_static(&cpu_type_info);
 136 }
 137
 138 type_init(cpu_register_types)