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 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 45 static 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 54 static 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 67 static 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 81 static 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 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) 107