LXR qemu/hw/i386/x86-iommu.c

   1/*
   2 * QEMU emulation of common X86 IOMMU
   3 *
   4 * Copyright (C) 2016 Peter Xu, Red Hat <peterx@redhat.com>
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation; either version 2 of the License, or
   9 * (at your option) any later version.
  10
  11 * This program is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15
  16 * You should have received a copy of the GNU General Public License along
  17 * with this program; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20#include "qemu/osdep.h"
  21#include "hw/sysbus.h"
  22#include "hw/boards.h"
  23#include "hw/i386/x86-iommu.h"
  24#include "hw/i386/pc.h"
  25#include "qapi/error.h"
  26#include "qemu/error-report.h"
  27#include "trace.h"
  28
  29void x86_iommu_iec_register_notifier(X86IOMMUState *iommu,
  30                                     iec_notify_fn fn, void *data)
  31{
  32    IEC_Notifier *notifier = g_new0(IEC_Notifier, 1);
  33
  34    notifier->iec_notify = fn;
  35    notifier->private = data;
  36
  37    QLIST_INSERT_HEAD(&iommu->iec_notifiers, notifier, list);
  38}
  39
  40void x86_iommu_iec_notify_all(X86IOMMUState *iommu, bool global,
  41                              uint32_t index, uint32_t mask)
  42{
  43    IEC_Notifier *notifier;
  44
  45    trace_x86_iommu_iec_notify(global, index, mask);
  46
  47    QLIST_FOREACH(notifier, &iommu->iec_notifiers, list) {
  48        if (notifier->iec_notify) {
  49            notifier->iec_notify(notifier->private, global,
  50                                 index, mask);
  51        }
  52    }
  53}
  54
  55/* Default X86 IOMMU device */
  56static X86IOMMUState *x86_iommu_default = NULL;
  57
  58static void x86_iommu_set_default(X86IOMMUState *x86_iommu)
  59{
  60    assert(x86_iommu);
  61
  62    if (x86_iommu_default) {
  63        error_report("QEMU does not support multiple vIOMMUs "
  64                     "for x86 yet.");
  65        exit(1);
  66    }
  67
  68    x86_iommu_default = x86_iommu;
  69}
  70
  71X86IOMMUState *x86_iommu_get_default(void)
  72{
  73    return x86_iommu_default;
  74}
  75
  76IommuType x86_iommu_get_type(void)
  77{
  78    return x86_iommu_default->type;
  79}
  80
  81static void x86_iommu_realize(DeviceState *dev, Error **errp)
  82{
  83    X86IOMMUState *x86_iommu = X86_IOMMU_DEVICE(dev);
  84    X86IOMMUClass *x86_class = X86_IOMMU_GET_CLASS(dev);
  85    MachineState *ms = MACHINE(qdev_get_machine());
  86    MachineClass *mc = MACHINE_GET_CLASS(ms);
  87    PCMachineState *pcms =
  88        PC_MACHINE(object_dynamic_cast(OBJECT(ms), TYPE_PC_MACHINE));
  89    QLIST_INIT(&x86_iommu->iec_notifiers);
  90
  91    if (!pcms || !pcms->bus) {
  92        error_setg(errp, "Machine-type '%s' not supported by IOMMU",
  93                   mc->name);
  94        return;
  95    }
  96
  97    if (x86_class->realize) {
  98        x86_class->realize(dev, errp);
  99    }
 100
 101    x86_iommu_set_default(X86_IOMMU_DEVICE(dev));
 102}
 103
 104static Property x86_iommu_properties[] = {
 105    DEFINE_PROP_BOOL("intremap", X86IOMMUState, intr_supported, false),
 106    DEFINE_PROP_BOOL("device-iotlb", X86IOMMUState, dt_supported, false),
 107    DEFINE_PROP_BOOL("pt", X86IOMMUState, pt_supported, true),
 108    DEFINE_PROP_END_OF_LIST(),
 109};
 110
 111static void x86_iommu_class_init(ObjectClass *klass, void *data)
 112{
 113    DeviceClass *dc = DEVICE_CLASS(klass);
 114    dc->realize = x86_iommu_realize;
 115    dc->props = x86_iommu_properties;
 116}
 117
 118static const TypeInfo x86_iommu_info = {
 119    .name          = TYPE_X86_IOMMU_DEVICE,
 120    .parent        = TYPE_SYS_BUS_DEVICE,
 121    .instance_size = sizeof(X86IOMMUState),
 122    .class_init    = x86_iommu_class_init,
 123    .class_size    = sizeof(X86IOMMUClass),
 124    .abstract      = true,
 125};
 126
 127static void x86_iommu_register_types(void)
 128{
 129    type_register_static(&x86_iommu_info);
 130}
 131
 132type_init(x86_iommu_register_types)
 133