LXR qemu/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
  36static 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 */
  44AccelClass *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
  52static 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 */
  77static 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
  96void 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
 105void 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
 114bool 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
 124static const TypeInfo accel_cpu_type = {
 125    .name = TYPE_ACCEL_CPU,
 126    .parent = TYPE_OBJECT,
 127    .abstract = true,
 128    .class_size = sizeof(AccelCPUClass),
 129};
 130
 131static void register_accel_types(void)
 132{
 133    type_register_static(&accel_type);
 134    type_register_static(&accel_cpu_type);
 135}
 136
 137type_init(register_accel_types);
 138