1 /* 2 * tpm_tis_sysbus.c - QEMU's TPM TIS SYSBUS Device 3 * 4 * Copyright (C) 2006,2010-2013 IBM Corporation 5 * 6 * Authors: 7 * Stefan Berger <stefanb@us.ibm.com> 8 * David Safford <safford@us.ibm.com> 9 * 10 * Xen 4 support: Andrease Niederl <andreas.niederl@iaik.tugraz.at> 11 * 12 * This work is licensed under the terms of the GNU GPL, version 2 or later. 13 * See the COPYING file in the top-level directory. 14 * 15 * Implementation of the TIS interface according to specs found at 16 * http://www.trustedcomputinggroup.org. This implementation currently 17 * supports version 1.3, 21 March 2013 18 * In the developers menu choose the PC Client section then find the TIS 19 * specification. 20 * 21 * TPM TIS for TPM 2 implementation following TCG PC Client Platform 22 * TPM Profile (PTP) Specification, Familiy 2.0, Revision 00.43 23 */ 24 25 #include "qemu/osdep.h" 26 #include "hw/qdev-properties.h" 27 #include "migration/vmstate.h" 28 #include "hw/acpi/tpm.h" 29 #include "tpm_prop.h" 30 #include "hw/sysbus.h" 31 #include "tpm_tis.h" 32 #include "qom/object.h" 33 34 struct TPMStateSysBus { 35 /*< private >*/ 36 SysBusDevice parent_obj; 37 38 /*< public >*/ 39 TPMState state; /* not a QOM object */ 40 }; 41 typedef struct TPMStateSysBus TPMStateSysBus; 42 43 DECLARE_INSTANCE_CHECKER(TPMStateSysBus, TPM_TIS_SYSBUS, 44 TYPE_TPM_TIS_SYSBUS) 45 46 static int tpm_tis_pre_save_sysbus(void *opaque) 47 { 48 TPMStateSysBus *sbdev = opaque; 49 50 return tpm_tis_pre_save(&sbdev->state); 51 } 52 53 static const VMStateDescription vmstate_tpm_tis_sysbus = { 54 .name = "tpm-tis", 55 .version_id = 0, 56 .pre_save = tpm_tis_pre_save_sysbus, 57 .fields = (VMStateField[]) { 58 VMSTATE_BUFFER(state.buffer, TPMStateSysBus), 59 VMSTATE_UINT16(state.rw_offset, TPMStateSysBus), 60 VMSTATE_UINT8(state.active_locty, TPMStateSysBus), 61 VMSTATE_UINT8(state.aborting_locty, TPMStateSysBus), 62 VMSTATE_UINT8(state.next_locty, TPMStateSysBus), 63 64 VMSTATE_STRUCT_ARRAY(state.loc, TPMStateSysBus, TPM_TIS_NUM_LOCALITIES, 65 0, vmstate_locty, TPMLocality), 66 67 VMSTATE_END_OF_LIST() 68 } 69 }; 70 71 static void tpm_tis_sysbus_request_completed(TPMIf *ti, int ret) 72 { 73 TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(ti); 74 TPMState *s = &sbdev->state; 75 76 tpm_tis_request_completed(s, ret); 77 } 78 79 static enum TPMVersion tpm_tis_sysbus_get_tpm_version(TPMIf *ti) 80 { 81 TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(ti); 82 TPMState *s = &sbdev->state; 83 84 return tpm_tis_get_tpm_version(s); 85 } 86 87 static void tpm_tis_sysbus_reset(DeviceState *dev) 88 { 89 TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(dev); 90 TPMState *s = &sbdev->state; 91 92 return tpm_tis_reset(s); 93 } 94 95 static Property tpm_tis_sysbus_properties[] = { 96 DEFINE_PROP_UINT32("irq", TPMStateSysBus, state.irq_num, TPM_TIS_IRQ), 97 DEFINE_PROP_TPMBE("tpmdev", TPMStateSysBus, state.be_driver), 98 DEFINE_PROP_BOOL("ppi", TPMStateSysBus, state.ppi_enabled, false), 99 DEFINE_PROP_END_OF_LIST(), 100 }; 101 102 static void tpm_tis_sysbus_initfn(Object *obj) 103 { 104 TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(obj); 105 TPMState *s = &sbdev->state; 106 107 memory_region_init_io(&s->mmio, obj, &tpm_tis_memory_ops, 108 s, "tpm-tis-mmio", 109 TPM_TIS_NUM_LOCALITIES << TPM_TIS_LOCALITY_SHIFT); 110 111 sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio); 112 sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq); 113 } 114 115 static void tpm_tis_sysbus_realizefn(DeviceState *dev, Error **errp) 116 { 117 TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(dev); 118 TPMState *s = &sbdev->state; 119 120 if (!tpm_find()) { 121 error_setg(errp, "at most one TPM device is permitted"); 122 return; 123 } 124 125 if (!s->be_driver) { 126 error_setg(errp, "'tpmdev' property is required"); 127 return; 128 } 129 } 130 131 static void tpm_tis_sysbus_class_init(ObjectClass *klass, void *data) 132 { 133 DeviceClass *dc = DEVICE_CLASS(klass); 134 TPMIfClass *tc = TPM_IF_CLASS(klass); 135 136 device_class_set_props(dc, tpm_tis_sysbus_properties); 137 dc->vmsd = &vmstate_tpm_tis_sysbus; 138 tc->model = TPM_MODEL_TPM_TIS; 139 dc->realize = tpm_tis_sysbus_realizefn; 140 dc->user_creatable = true; 141 dc->reset = tpm_tis_sysbus_reset; 142 tc->request_completed = tpm_tis_sysbus_request_completed; 143 tc->get_version = tpm_tis_sysbus_get_tpm_version; 144 } 145 146 static const TypeInfo tpm_tis_sysbus_info = { 147 .name = TYPE_TPM_TIS_SYSBUS, 148 .parent = TYPE_SYS_BUS_DEVICE, 149 .instance_size = sizeof(TPMStateSysBus), 150 .instance_init = tpm_tis_sysbus_initfn, 151 .class_init = tpm_tis_sysbus_class_init, 152 .interfaces = (InterfaceInfo[]) { 153 { TYPE_TPM_IF }, 154 { } 155 } 156 }; 157 158 static void tpm_tis_sysbus_register(void) 159 { 160 type_register_static(&tpm_tis_sysbus_info); 161 } 162 163 type_init(tpm_tis_sysbus_register) 164