accel/accel-system.c

   1 /*
   2  * QEMU accel class, system emulation components
   3  *
   4  * Copyright (c) 2003-2008 Fabrice Bellard
   5  * Copyright (c) 2014 Red Hat Inc.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  23  * THE SOFTWARE.
  24  */
  25
  26 #include "qemu/osdep.h"
  27 #include "qemu/accel.h"
  28 #include "hw/boards.h"
  29 #include "sysemu/cpus.h"
  30 #include "qemu/error-report.h"
  31 #include "accel-system.h"
  32
  33 int accel_init_machine(AccelState *accel, MachineState *ms)
  34 {
  35     AccelClass *acc = ACCEL_GET_CLASS(accel);
  36     int ret;
  37     ms->accelerator = accel;
  38     *(acc->allowed) = true;
  39     ret = acc->init_machine(ms);
  40     if (ret < 0) {
  41         ms->accelerator = NULL;
  42         *(acc->allowed) = false;
  43         object_unref(OBJECT(accel));
  44     } else {
  45         object_set_accelerator_compat_props(acc->compat_props);
  46     }
  47     return ret;
  48 }
  49
  50 AccelState *current_accel(void)
  51 {
  52     return current_machine->accelerator;
  53 }
  54
  55 void accel_setup_post(MachineState *ms)
  56 {
  57     AccelState *accel = ms->accelerator;
  58     AccelClass *acc = ACCEL_GET_CLASS(accel);
  59     if (acc->setup_post) {
  60         acc->setup_post(ms, accel);
  61     }
  62 }
  63
  64 /* initialize the arch-independent accel operation interfaces */
  65 void accel_init_ops_interfaces(AccelClass *ac)
  66 {
  67     const char *ac_name;
  68     char *ops_name;
  69     ObjectClass *oc;
  70     AccelOpsClass *ops;
  71
  72     ac_name = object_class_get_name(OBJECT_CLASS(ac));
  73     g_assert(ac_name != NULL);
  74
  75     ops_name = g_strdup_printf("%s" ACCEL_OPS_SUFFIX, ac_name);
  76     ops = ACCEL_OPS_CLASS(module_object_class_by_name(ops_name));
  77     oc = module_object_class_by_name(ops_name);
  78     if (!oc) {
  79         error_report("fatal: could not load module for type '%s'", ops_name);
  80         exit(1);
  81     }
  82     g_free(ops_name);
  83     ops = ACCEL_OPS_CLASS(oc);
  84     /*
  85      * all accelerators need to define ops, providing at least a mandatory
  86      * non-NULL create_vcpu_thread operation.
  87      */
  88     g_assert(ops != NULL);
  89     if (ops->ops_init) {
  90         ops->ops_init(ops);
  91     }
  92     cpus_register_accel(ops);
  93 }
  94
  95 static const TypeInfo accel_ops_type_info = {
  96     .name = TYPE_ACCEL_OPS,
  97     .parent = TYPE_OBJECT,
  98     .abstract = true,
  99     .class_size = sizeof(AccelOpsClass),
 100 };
 101
 102 static void accel_system_register_types(void)
 103 {
 104     type_register_static(&accel_ops_type_info);
 105 }
 106 type_init(accel_system_register_types);