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 "tpm_util.h" 29 #include "hw/sysbus.h" 30 #include "tpm_tis.h" 31 32 typedef struct TPMStateSysBus { 33 /*< private >*/ 34 SysBusDevice parent_obj; 35 36 /*< public >*/ 37 TPMState state; /* not a QOM object */ 38 } TPMStateSysBus; 39 40 #define TPM_TIS_SYSBUS(obj) OBJECT_CHECK(TPMStateSysBus, (obj), TYPE_TPM_TIS_SYSBUS) 41 42 static int tpm_tis_pre_save_sysbus(void *opaque) 43 { 44 TPMStateSysBus *sbdev = opaque; 45 46 return tpm_tis_pre_save(&sbdev->state); 47 } 48 49 static const VMStateDescription vmstate_tpm_tis_sysbus = { 50 .name = "tpm-tis", 51 .version_id = 0, 52 .pre_save = tpm_tis_pre_save_sysbus, 53 .fields = (VMStateField[]) { 54 VMSTATE_BUFFER(state.buffer, TPMStateSysBus), 55 VMSTATE_UINT16(state.rw_offset, TPMStateSysBus), 56 VMSTATE_UINT8(state.active_locty, TPMStateSysBus), 57 VMSTATE_UINT8(state.aborting_locty, TPMStateSysBus), 58 VMSTATE_UINT8(state.next_locty, TPMStateSysBus), 59 60 VMSTATE_STRUCT_ARRAY(state.loc, TPMStateSysBus, TPM_TIS_NUM_LOCALITIES, 61 0, vmstate_locty, TPMLocality), 62 63 VMSTATE_END_OF_LIST() 64 } 65 }; 66 67 static void tpm_tis_sysbus_request_completed(TPMIf *ti, int ret) 68 { 69 TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(ti); 70 TPMState *s = &sbdev->state; 71 72 tpm_tis_request_completed(s, ret); 73 } 74 75 static enum TPMVersion tpm_tis_sysbus_get_tpm_version(TPMIf *ti) 76 { 77 TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(ti); 78 TPMState *s = &sbdev->state; 79 80 return tpm_tis_get_tpm_version(s); 81 } 82 83 static void tpm_tis_sysbus_reset(DeviceState *dev) 84 { 85 TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(dev); 86 TPMState *s = &sbdev->state; 87 88 return tpm_tis_reset(s); 89 } 90 91 static Property tpm_tis_sysbus_properties[] = { 92 DEFINE_PROP_UINT32("irq", TPMStateSysBus, state.irq_num, TPM_TIS_IRQ), 93 DEFINE_PROP_TPMBE("tpmdev", TPMStateSysBus, state.be_driver), 94 DEFINE_PROP_BOOL("ppi", TPMStateSysBus, state.ppi_enabled, true), 95 DEFINE_PROP_END_OF_LIST(), 96 }; 97 98 static void tpm_tis_sysbus_initfn(Object *obj) 99 { 100 TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(obj); 101 TPMState *s = &sbdev->state; 102 103 memory_region_init_io(&s->mmio, obj, &tpm_tis_memory_ops, 104 s, "tpm-tis-mmio", 105 TPM_TIS_NUM_LOCALITIES << TPM_TIS_LOCALITY_SHIFT); 106 107 sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio); 108 sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq); 109 } 110 111 static void tpm_tis_sysbus_realizefn(DeviceState *dev, Error **errp) 112 { 113 TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(dev); 114 TPMState *s = &sbdev->state; 115 116 if (!tpm_find()) { 117 error_setg(errp, "at most one TPM device is permitted"); 118 return; 119 } 120 121 if (!s->be_driver) { 122 error_setg(errp, "'tpmdev' property is required"); 123 return; 124 } 125 } 126 127 static void tpm_tis_sysbus_class_init(ObjectClass *klass, void *data) 128 { 129 DeviceClass *dc = DEVICE_CLASS(klass); 130 TPMIfClass *tc = TPM_IF_CLASS(klass); 131 132 device_class_set_props(dc, tpm_tis_sysbus_properties); 133 dc->vmsd = &vmstate_tpm_tis_sysbus; 134 tc->model = TPM_MODEL_TPM_TIS; 135 dc->realize = tpm_tis_sysbus_realizefn; 136 dc->user_creatable = true; 137 dc->reset = tpm_tis_sysbus_reset; 138 tc->request_completed = tpm_tis_sysbus_request_completed; 139 tc->get_version = tpm_tis_sysbus_get_tpm_version; 140 } 141 142 static const TypeInfo tpm_tis_sysbus_info = { 143 .name = TYPE_TPM_TIS_SYSBUS, 144 .parent = TYPE_SYS_BUS_DEVICE, 145 .instance_size = sizeof(TPMStateSysBus), 146 .instance_init = tpm_tis_sysbus_initfn, 147 .class_init = tpm_tis_sysbus_class_init, 148 .interfaces = (InterfaceInfo[]) { 149 { TYPE_TPM_IF }, 150 { } 151 } 152 }; 153 154 static void tpm_tis_sysbus_register(void) 155 { 156 type_register_static(&tpm_tis_sysbus_info); 157 } 158 159 type_init(tpm_tis_sysbus_register) 160