LXR qemu/hw/cpu/core.c

   1/*
   2 * CPU core abstract device
   3 *
   4 * Copyright (C) 2016 Bharata B Rao <bharata@linux.vnet.ibm.com>
   5 *
   6 * This work is licensed under the terms of the GNU GPL, version 2 or later.
   7 * See the COPYING file in the top-level directory.
   8 */
   9
  10#include "qemu/osdep.h"
  11#include "hw/cpu/core.h"
  12#include "qapi/visitor.h"
  13#include "qemu/module.h"
  14#include "qapi/error.h"
  15#include "sysemu/cpus.h"
  16#include "hw/boards.h"
  17
  18static void core_prop_get_core_id(Object *obj, Visitor *v, const char *name,
  19                                  void *opaque, Error **errp)
  20{
  21    CPUCore *core = CPU_CORE(obj);
  22    int64_t value = core->core_id;
  23
  24    visit_type_int(v, name, &value, errp);
  25}
  26
  27static void core_prop_set_core_id(Object *obj, Visitor *v, const char *name,
  28                                  void *opaque, Error **errp)
  29{
  30    CPUCore *core = CPU_CORE(obj);
  31    int64_t value;
  32
  33    if (!visit_type_int(v, name, &value, errp)) {
  34        return;
  35    }
  36
  37    if (value < 0) {
  38        error_setg(errp, "Invalid core id %"PRId64, value);
  39        return;
  40    }
  41
  42    core->core_id = value;
  43}
  44
  45static void core_prop_get_nr_threads(Object *obj, Visitor *v, const char *name,
  46                                     void *opaque, Error **errp)
  47{
  48    CPUCore *core = CPU_CORE(obj);
  49    int64_t value = core->nr_threads;
  50
  51    visit_type_int(v, name, &value, errp);
  52}
  53
  54static void core_prop_set_nr_threads(Object *obj, Visitor *v, const char *name,
  55                                     void *opaque, Error **errp)
  56{
  57    CPUCore *core = CPU_CORE(obj);
  58    int64_t value;
  59
  60    if (!visit_type_int(v, name, &value, errp)) {
  61        return;
  62    }
  63
  64    core->nr_threads = value;
  65}
  66
  67static void cpu_core_instance_init(Object *obj)
  68{
  69    CPUCore *core = CPU_CORE(obj);
  70
  71    /*
  72     * Only '-device something-cpu-core,help' can get us there before
  73     * the machine has been created. We don't care to set nr_threads
  74     * in this case since it isn't used afterwards.
  75     */
  76    if (current_machine) {
  77        core->nr_threads = current_machine->smp.threads;
  78    }
  79}
  80
  81static void cpu_core_class_init(ObjectClass *oc, void *data)
  82{
  83    DeviceClass *dc = DEVICE_CLASS(oc);
  84
  85    set_bit(DEVICE_CATEGORY_CPU, dc->categories);
  86    object_class_property_add(oc, "core-id", "int", core_prop_get_core_id,
  87                              core_prop_set_core_id, NULL, NULL);
  88    object_class_property_add(oc, "nr-threads", "int", core_prop_get_nr_threads,
  89                              core_prop_set_nr_threads, NULL, NULL);
  90}
  91
  92static const TypeInfo cpu_core_type_info = {
  93    .name = TYPE_CPU_CORE,
  94    .parent = TYPE_DEVICE,
  95    .abstract = true,
  96    .class_init = cpu_core_class_init,
  97    .instance_size = sizeof(CPUCore),
  98    .instance_init = cpu_core_instance_init,
  99};
 100
 101static void cpu_core_register_types(void)
 102{
 103    type_register_static(&cpu_core_type_info);
 104}
 105
 106type_init(cpu_core_register_types)
 107