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
  27 void 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
  38 void 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 */
  54 static X86IOMMUState *x86_iommu_default = NULL;
  55
  56 static 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
  69 X86IOMMUState *x86_iommu_get_default(void)
  70 {
  71     return x86_iommu_default;
  72 }
  73
  74 static 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
  85 static void x86_iommu_class_init(ObjectClass *klass, void *data)
  86 {
  87     DeviceClass *dc = DEVICE_CLASS(klass);
  88     dc->realize = x86_iommu_realize;
  89 }
  90
  91 static 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
  97 static 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
 103 static 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
 113 static 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
 123 static void x86_iommu_register_types(void)
 124 {
 125     type_register_static(&x86_iommu_info);
 126 }
 127
 128 type_init(x86_iommu_register_types)