qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
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core.c (2854B)

      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)