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(module_object_class_by_name(class_name));
  48     g_free(class_name);
  49     return ac;
  50 }
  51
  52 /* Return the name of the current accelerator */
  53 const char *current_accel_name(void)
  54 {
  55     AccelClass *ac = ACCEL_GET_CLASS(current_accel());
  56
  57     return ac->name;
  58 }
  59
  60 static void accel_init_cpu_int_aux(ObjectClass *klass, void *opaque)
  61 {
  62     CPUClass *cc = CPU_CLASS(klass);
  63     AccelCPUClass *accel_cpu = opaque;
  64
  65     /*
  66      * The first callback allows accel-cpu to run initializations
  67      * for the CPU, customizing CPU behavior according to the accelerator.
  68      *
  69      * The second one allows the CPU to customize the accel-cpu
  70      * behavior according to the CPU.
  71      *
  72      * The second is currently only used by TCG, to specialize the
  73      * TCGCPUOps depending on the CPU type.
  74      */
  75     cc->accel_cpu = accel_cpu;
  76     if (accel_cpu->cpu_class_init) {
  77         accel_cpu->cpu_class_init(cc);
  78     }
  79     if (cc->init_accel_cpu) {
  80         cc->init_accel_cpu(accel_cpu, cc);
  81     }
  82 }
  83
  84 /* initialize the arch-specific accel CpuClass interfaces */
  85 static void accel_init_cpu_interfaces(AccelClass *ac)
  86 {
  87     const char *ac_name; /* AccelClass name */
  88     char *acc_name;      /* AccelCPUClass name */
  89     ObjectClass *acc;    /* AccelCPUClass */
  90
  91     ac_name = object_class_get_name(OBJECT_CLASS(ac));
  92     g_assert(ac_name != NULL);
  93
  94     acc_name = g_strdup_printf("%s-%s", ac_name, CPU_RESOLVING_TYPE);
  95     acc = object_class_by_name(acc_name);
  96     g_free(acc_name);
  97
  98     if (acc) {
  99         object_class_foreach(accel_init_cpu_int_aux,
 100                              CPU_RESOLVING_TYPE, false, acc);
 101     }
 102 }
 103
 104 void accel_init_interfaces(AccelClass *ac)
 105 {
 106 #ifndef CONFIG_USER_ONLY
 107     accel_init_ops_interfaces(ac);
 108 #endif /* !CONFIG_USER_ONLY */
 109
 110     accel_init_cpu_interfaces(ac);
 111 }
 112
 113 void accel_cpu_instance_init(CPUState *cpu)
 114 {
 115     CPUClass *cc = CPU_GET_CLASS(cpu);
 116
 117     if (cc->accel_cpu && cc->accel_cpu->cpu_instance_init) {
 118         cc->accel_cpu->cpu_instance_init(cpu);
 119     }
 120 }
 121
 122 bool accel_cpu_realizefn(CPUState *cpu, Error **errp)
 123 {
 124     CPUClass *cc = CPU_GET_CLASS(cpu);
 125
 126     if (cc->accel_cpu && cc->accel_cpu->cpu_realizefn) {
 127         return cc->accel_cpu->cpu_realizefn(cpu, errp);
 128     }
 129     return true;
 130 }
 131
 132 int accel_supported_gdbstub_sstep_flags(void)
 133 {
 134     AccelState *accel = current_accel();
 135     AccelClass *acc = ACCEL_GET_CLASS(accel);
 136     if (acc->gdbstub_supported_sstep_flags) {
 137         return acc->gdbstub_supported_sstep_flags();
 138     }
 139     return 0;
 140 }
 141
 142 static const TypeInfo accel_cpu_type = {
 143     .name = TYPE_ACCEL_CPU,
 144     .parent = TYPE_OBJECT,
 145     .abstract = true,
 146     .class_size = sizeof(AccelCPUClass),
 147 };
 148
 149 static void register_accel_types(void)
 150 {
 151     type_register_static(&accel_type);
 152     type_register_static(&accel_cpu_type);
 153 }
 154
 155 type_init(register_accel_types);