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
  52/* Return the name of the current accelerator */
  53const char *current_accel_name(void)
  54{
  55    AccelClass *ac = ACCEL_GET_CLASS(current_accel());
  56
  57    return ac->name;
  58}
  59
  60static 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 */
  85static 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
 104void 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
 113void 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
 122bool 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
 132static const TypeInfo accel_cpu_type = {
 133    .name = TYPE_ACCEL_CPU,
 134    .parent = TYPE_OBJECT,
 135    .abstract = true,
 136    .class_size = sizeof(AccelCPUClass),
 137};
 138
 139static void register_accel_types(void)
 140{
 141    type_register_static(&accel_type);
 142    type_register_static(&accel_cpu_type);
 143}
 144
 145type_init(register_accel_types);
 146