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