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 IommuType x86_iommu_get_type(void) 75 { 76 return x86_iommu_default->type; 77 } 78 79 static void x86_iommu_realize(DeviceState *dev, Error **errp) 80 { 81 X86IOMMUState *x86_iommu = X86_IOMMU_DEVICE(dev); 82 X86IOMMUClass *x86_class = X86_IOMMU_GET_CLASS(dev); 83 QLIST_INIT(&x86_iommu->iec_notifiers); 84 if (x86_class->realize) { 85 x86_class->realize(dev, errp); 86 } 87 88 x86_iommu_set_default(X86_IOMMU_DEVICE(dev)); 89 } 90 91 static void x86_iommu_class_init(ObjectClass *klass, void *data) 92 { 93 DeviceClass *dc = DEVICE_CLASS(klass); 94 dc->realize = x86_iommu_realize; 95 } 96 97 static bool x86_iommu_intremap_prop_get(Object *o, Error **errp) 98 { 99 X86IOMMUState *s = X86_IOMMU_DEVICE(o); 100 return s->intr_supported; 101 } 102 103 static void x86_iommu_intremap_prop_set(Object *o, bool value, Error **errp) 104 { 105 X86IOMMUState *s = X86_IOMMU_DEVICE(o); 106 s->intr_supported = value; 107 } 108 109 static bool x86_iommu_device_iotlb_prop_get(Object *o, Error **errp) 110 { 111 X86IOMMUState *s = X86_IOMMU_DEVICE(o); 112 return s->dt_supported; 113 } 114 115 static void x86_iommu_device_iotlb_prop_set(Object *o, bool value, Error **errp) 116 { 117 X86IOMMUState *s = X86_IOMMU_DEVICE(o); 118 s->dt_supported = value; 119 } 120 121 static void x86_iommu_instance_init(Object *o) 122 { 123 X86IOMMUState *s = X86_IOMMU_DEVICE(o); 124 125 /* By default, do not support IR */ 126 s->intr_supported = false; 127 object_property_add_bool(o, "intremap", x86_iommu_intremap_prop_get, 128 x86_iommu_intremap_prop_set, NULL); 129 s->dt_supported = false; 130 object_property_add_bool(o, "device-iotlb", 131 x86_iommu_device_iotlb_prop_get, 132 x86_iommu_device_iotlb_prop_set, 133 NULL); 134 } 135 136 static const TypeInfo x86_iommu_info = { 137 .name = TYPE_X86_IOMMU_DEVICE, 138 .parent = TYPE_SYS_BUS_DEVICE, 139 .instance_init = x86_iommu_instance_init, 140 .instance_size = sizeof(X86IOMMUState), 141 .class_init = x86_iommu_class_init, 142 .class_size = sizeof(X86IOMMUClass), 143 .abstract = true, 144 }; 145 146 static void x86_iommu_register_types(void) 147 { 148 type_register_static(&x86_iommu_info); 149 } 150 151 type_init(x86_iommu_register_types) 152