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 "qemu/error-report.h"
  25#include "trace.h"
  26
  27void x86_iommu_iec_register_notifier(X86IOMMUState *iommu,
  28                                     iec_notify_fn fn, void *data)
  29{
  30    IEC_Notifier *notifier = g_new0(IEC_Notifier, 1);
  31
  32    notifier->iec_notify = fn;
  33    notifier->private = data;
  34
  35    QLIST_INSERT_HEAD(&iommu->iec_notifiers, notifier, list);
  36}
  37
  38void x86_iommu_iec_notify_all(X86IOMMUState *iommu, bool global,
  39                              uint32_t index, uint32_t mask)
  40{
  41    IEC_Notifier *notifier;
  42
  43    trace_x86_iommu_iec_notify(global, index, mask);
  44
  45    QLIST_FOREACH(notifier, &iommu->iec_notifiers, list) {
  46        if (notifier->iec_notify) {
  47            notifier->iec_notify(notifier->private, global,
  48                                 index, mask);
  49        }
  50    }
  51}
  52
  53/* Default X86 IOMMU device */
  54static X86IOMMUState *x86_iommu_default = NULL;
  55
  56static void x86_iommu_set_default(X86IOMMUState *x86_iommu)
  57{
  58    assert(x86_iommu);
  59
  60    if (x86_iommu_default) {
  61        error_report("QEMU does not support multiple vIOMMUs "
  62                     "for x86 yet.");
  63        exit(1);
  64    }
  65
  66    x86_iommu_default = x86_iommu;
  67}
  68
  69X86IOMMUState *x86_iommu_get_default(void)
  70{
  71    return x86_iommu_default;
  72}
  73
  74static void x86_iommu_realize(DeviceState *dev, Error **errp)
  75{
  76    X86IOMMUState *x86_iommu = X86_IOMMU_DEVICE(dev);
  77    X86IOMMUClass *x86_class = X86_IOMMU_GET_CLASS(dev);
  78    QLIST_INIT(&x86_iommu->iec_notifiers);
  79    if (x86_class->realize) {
  80        x86_class->realize(dev, errp);
  81    }
  82    x86_iommu_set_default(X86_IOMMU_DEVICE(dev));
  83}
  84
  85static void x86_iommu_class_init(ObjectClass *klass, void *data)
  86{
  87    DeviceClass *dc = DEVICE_CLASS(klass);
  88    dc->realize = x86_iommu_realize;
  89}
  90
  91static bool x86_iommu_intremap_prop_get(Object *o, Error **errp)
  92{
  93    X86IOMMUState *s = X86_IOMMU_DEVICE(o);
  94    return s->intr_supported;
  95}
  96
  97static void x86_iommu_intremap_prop_set(Object *o, bool value, Error **errp)
  98{
  99    X86IOMMUState *s = X86_IOMMU_DEVICE(o);
 100    s->intr_supported = value;
 101}
 102
 103static void x86_iommu_instance_init(Object *o)
 104{
 105    X86IOMMUState *s = X86_IOMMU_DEVICE(o);
 106
 107    /* By default, do not support IR */
 108    s->intr_supported = false;
 109    object_property_add_bool(o, "intremap", x86_iommu_intremap_prop_get,
 110                             x86_iommu_intremap_prop_set, NULL);
 111}
 112
 113static const TypeInfo x86_iommu_info = {
 114    .name          = TYPE_X86_IOMMU_DEVICE,
 115    .parent        = TYPE_SYS_BUS_DEVICE,
 116    .instance_init = x86_iommu_instance_init,
 117    .instance_size = sizeof(X86IOMMUState),
 118    .class_init    = x86_iommu_class_init,
 119    .class_size    = sizeof(X86IOMMUClass),
 120    .abstract      = true,
 121};
 122
 123static void x86_iommu_register_types(void)
 124{
 125    type_register_static(&x86_iommu_info);
 126}
 127
 128type_init(x86_iommu_register_types)
 129