accel/accel-common.c

   1 /*
   2  * QEMU accel class, components common to system emulation and user mode
   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
  29 #include "cpu.h"
  30 #include "hw/core/accel-cpu.h"
  31
  32 #ifndef CONFIG_USER_ONLY
  33 #include "accel-softmmu.h"
  34 #endif /* !CONFIG_USER_ONLY */
  35
  36 static const TypeInfo accel_type = {
  37     .name = TYPE_ACCEL,
  38     .parent = TYPE_OBJECT,
  39     .class_size = sizeof(AccelClass),
  40     .instance_size = sizeof(AccelState),
  41 };
  42
  43 /* Lookup AccelClass from opt_name. Returns NULL if not found */
  44 AccelClass *accel_find(const char *opt_name)
  45 {
  46     char *class_name = g_strdup_printf(ACCEL_CLASS_NAME("%s"), opt_name);
  47     AccelClass *ac = ACCEL_CLASS(object_class_by_name(class_name));
  48     g_free(class_name);
  49     return ac;
  50 }
  51
  52 static void accel_init_cpu_int_aux(ObjectClass *klass, void *opaque)
  53 {
  54     CPUClass *cc = CPU_CLASS(klass);
  55     AccelCPUClass *accel_cpu = opaque;
  56
  57     /*
  58      * The first callback allows accel-cpu to run initializations
  59      * for the CPU, customizing CPU behavior according to the accelerator.
  60      *
  61      * The second one allows the CPU to customize the accel-cpu
  62      * behavior according to the CPU.
  63      *
  64      * The second is currently only used by TCG, to specialize the
  65      * TCGCPUOps depending on the CPU type.
  66      */
  67     cc->accel_cpu = accel_cpu;
  68     if (accel_cpu->cpu_class_init) {
  69         accel_cpu->cpu_class_init(cc);
  70     }
  71     if (cc->init_accel_cpu) {
  72         cc->init_accel_cpu(accel_cpu, cc);
  73     }
  74 }
  75
  76 /* initialize the arch-specific accel CpuClass interfaces */
  77 static void accel_init_cpu_interfaces(AccelClass *ac)
  78 {
  79     const char *ac_name; /* AccelClass name */
  80     char *acc_name;      /* AccelCPUClass name */
  81     ObjectClass *acc;    /* AccelCPUClass */
  82
  83     ac_name = object_class_get_name(OBJECT_CLASS(ac));
  84     g_assert(ac_name != NULL);
  85
  86     acc_name = g_strdup_printf("%s-%s", ac_name, CPU_RESOLVING_TYPE);
  87     acc = object_class_by_name(acc_name);
  88     g_free(acc_name);
  89
  90     if (acc) {
  91         object_class_foreach(accel_init_cpu_int_aux,
  92                              CPU_RESOLVING_TYPE, false, acc);
  93     }
  94 }
  95
  96 void accel_init_interfaces(AccelClass *ac)
  97 {
  98 #ifndef CONFIG_USER_ONLY
  99     accel_init_ops_interfaces(ac);
 100 #endif /* !CONFIG_USER_ONLY */
 101
 102     accel_init_cpu_interfaces(ac);
 103 }
 104
 105 void accel_cpu_instance_init(CPUState *cpu)
 106 {
 107     CPUClass *cc = CPU_GET_CLASS(cpu);
 108
 109     if (cc->accel_cpu && cc->accel_cpu->cpu_instance_init) {
 110         cc->accel_cpu->cpu_instance_init(cpu);
 111     }
 112 }
 113
 114 bool accel_cpu_realizefn(CPUState *cpu, Error **errp)
 115 {
 116     CPUClass *cc = CPU_GET_CLASS(cpu);
 117
 118     if (cc->accel_cpu && cc->accel_cpu->cpu_realizefn) {
 119         return cc->accel_cpu->cpu_realizefn(cpu, errp);
 120     }
 121     return true;
 122 }
 123
 124 static const TypeInfo accel_cpu_type = {
 125     .name = TYPE_ACCEL_CPU,
 126     .parent = TYPE_OBJECT,
 127     .abstract = true,
 128     .class_size = sizeof(AccelCPUClass),
 129 };
 130
 131 static void register_accel_types(void)
 132 {
 133     type_register_static(&accel_type);
 134     type_register_static(&accel_cpu_type);
 135 }
 136
 137 type_init(register_accel_types);