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 29 void 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 40 void 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 */ 56 static X86IOMMUState *x86_iommu_default = NULL; 57 58 static 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 71 X86IOMMUState *x86_iommu_get_default(void) 72 { 73 return x86_iommu_default; 74 } 75 76 IommuType x86_iommu_get_type(void) 77 { 78 return x86_iommu_default->type; 79 } 80 81 static 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 } 103 104 static 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 }; 110 111 static 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 } 117 118 static 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 }; 126 127 static void x86_iommu_register_types(void) 128 { 129 type_register_static(&x86_iommu_info); 130 } 131 132 type_init(x86_iommu_register_types) 133