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
  18 static 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
  27 static 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     Error *local_err = NULL;
  32     int64_t value;
  33
  34     visit_type_int(v, name, &value, &local_err);
  35     if (local_err) {
  36         error_propagate(errp, local_err);
  37         return;
  38     }
  39
  40     if (value < 0) {
  41         error_setg(errp, "Invalid core id %"PRId64, value);
  42         return;
  43     }
  44
  45     core->core_id = value;
  46 }
  47
  48 static void core_prop_get_nr_threads(Object *obj, Visitor *v, const char *name,
  49                                      void *opaque, Error **errp)
  50 {
  51     CPUCore *core = CPU_CORE(obj);
  52     int64_t value = core->nr_threads;
  53
  54     visit_type_int(v, name, &value, errp);
  55 }
  56
  57 static void core_prop_set_nr_threads(Object *obj, Visitor *v, const char *name,
  58                                      void *opaque, Error **errp)
  59 {
  60     CPUCore *core = CPU_CORE(obj);
  61     Error *local_err = NULL;
  62     int64_t value;
  63
  64     visit_type_int(v, name, &value, &local_err);
  65     if (local_err) {
  66         error_propagate(errp, local_err);
  67         return;
  68     }
  69
  70     core->nr_threads = value;
  71 }
  72
  73 static void cpu_core_instance_init(Object *obj)
  74 {
  75     MachineState *ms = MACHINE(qdev_get_machine());
  76     CPUCore *core = CPU_CORE(obj);
  77
  78     object_property_add(obj, "core-id", "int", core_prop_get_core_id,
  79                         core_prop_set_core_id, NULL, NULL, NULL);
  80     object_property_add(obj, "nr-threads", "int", core_prop_get_nr_threads,
  81                         core_prop_set_nr_threads, NULL, NULL, NULL);
  82     core->nr_threads = ms->smp.threads;
  83 }
  84
  85 static void cpu_core_class_init(ObjectClass *oc, void *data)
  86 {
  87     DeviceClass *dc = DEVICE_CLASS(oc);
  88
  89     set_bit(DEVICE_CATEGORY_CPU, dc->categories);
  90 }
  91
  92 static 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
 101 static void cpu_core_register_types(void)
 102 {
 103     type_register_static(&cpu_core_type_info);
 104 }
 105
 106 type_init(cpu_core_register_types)