1 /* 2 * tpm_tis_isa.c - QEMU's TPM TIS ISA 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/isa/isa.h" 27 #include "hw/qdev-properties.h" 28 #include "migration/vmstate.h" 29 #include "tpm_util.h" 30 #include "tpm_tis.h" 31 32 typedef struct TPMStateISA { 33 /*< private >*/ 34 ISADevice parent_obj; 35 36 /*< public >*/ 37 TPMState state; /* not a QOM object */ 38 } TPMStateISA; 39 40 #define TPM_TIS_ISA(obj) OBJECT_CHECK(TPMStateISA, (obj), TYPE_TPM_TIS_ISA) 41 42 static int tpm_tis_pre_save_isa(void *opaque) 43 { 44 TPMStateISA *isadev = opaque; 45 46 return tpm_tis_pre_save(&isadev->state); 47 } 48 49 static const VMStateDescription vmstate_tpm_tis_isa = { 50 .name = "tpm-tis", 51 .version_id = 0, 52 .pre_save = tpm_tis_pre_save_isa, 53 .fields = (VMStateField[]) { 54 VMSTATE_BUFFER(state.buffer, TPMStateISA), 55 VMSTATE_UINT16(state.rw_offset, TPMStateISA), 56 VMSTATE_UINT8(state.active_locty, TPMStateISA), 57 VMSTATE_UINT8(state.aborting_locty, TPMStateISA), 58 VMSTATE_UINT8(state.next_locty, TPMStateISA), 59 60 VMSTATE_STRUCT_ARRAY(state.loc, TPMStateISA, TPM_TIS_NUM_LOCALITIES, 0, 61 vmstate_locty, TPMLocality), 62 63 VMSTATE_END_OF_LIST() 64 } 65 }; 66 67 static void tpm_tis_isa_request_completed(TPMIf *ti, int ret) 68 { 69 TPMStateISA *isadev = TPM_TIS_ISA(ti); 70 TPMState *s = &isadev->state; 71 72 tpm_tis_request_completed(s, ret); 73 } 74 75 static enum TPMVersion tpm_tis_isa_get_tpm_version(TPMIf *ti) 76 { 77 TPMStateISA *isadev = TPM_TIS_ISA(ti); 78 TPMState *s = &isadev->state; 79 80 return tpm_tis_get_tpm_version(s); 81 } 82 83 static void tpm_tis_isa_reset(DeviceState *dev) 84 { 85 TPMStateISA *isadev = TPM_TIS_ISA(dev); 86 TPMState *s = &isadev->state; 87 88 return tpm_tis_reset(s); 89 } 90 91 static Property tpm_tis_isa_properties[] = { 92 DEFINE_PROP_UINT32("irq", TPMStateISA, state.irq_num, TPM_TIS_IRQ), 93 DEFINE_PROP_TPMBE("tpmdev", TPMStateISA, state.be_driver), 94 DEFINE_PROP_BOOL("ppi", TPMStateISA, state.ppi_enabled, true), 95 DEFINE_PROP_END_OF_LIST(), 96 }; 97 98 static void tpm_tis_isa_initfn(Object *obj) 99 { 100 TPMStateISA *isadev = TPM_TIS_ISA(obj); 101 TPMState *s = &isadev->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 } 107 108 static void tpm_tis_isa_realizefn(DeviceState *dev, Error **errp) 109 { 110 TPMStateISA *isadev = TPM_TIS_ISA(dev); 111 TPMState *s = &isadev->state; 112 113 if (!tpm_find()) { 114 error_setg(errp, "at most one TPM device is permitted"); 115 return; 116 } 117 118 if (!s->be_driver) { 119 error_setg(errp, "'tpmdev' property is required"); 120 return; 121 } 122 if (s->irq_num > 15) { 123 error_setg(errp, "IRQ %d is outside valid range of 0 to 15", 124 s->irq_num); 125 return; 126 } 127 128 isa_init_irq(ISA_DEVICE(dev), &s->irq, s->irq_num); 129 130 memory_region_add_subregion(isa_address_space(ISA_DEVICE(dev)), 131 TPM_TIS_ADDR_BASE, &s->mmio); 132 133 if (s->ppi_enabled) { 134 tpm_ppi_init(&s->ppi, isa_address_space(ISA_DEVICE(dev)), 135 TPM_PPI_ADDR_BASE, OBJECT(dev)); 136 } 137 } 138 139 static void tpm_tis_isa_class_init(ObjectClass *klass, void *data) 140 { 141 DeviceClass *dc = DEVICE_CLASS(klass); 142 TPMIfClass *tc = TPM_IF_CLASS(klass); 143 144 device_class_set_props(dc, tpm_tis_isa_properties); 145 dc->vmsd = &vmstate_tpm_tis_isa; 146 tc->model = TPM_MODEL_TPM_TIS; 147 dc->realize = tpm_tis_isa_realizefn; 148 dc->reset = tpm_tis_isa_reset; 149 tc->request_completed = tpm_tis_isa_request_completed; 150 tc->get_version = tpm_tis_isa_get_tpm_version; 151 } 152 153 static const TypeInfo tpm_tis_isa_info = { 154 .name = TYPE_TPM_TIS_ISA, 155 .parent = TYPE_ISA_DEVICE, 156 .instance_size = sizeof(TPMStateISA), 157 .instance_init = tpm_tis_isa_initfn, 158 .class_init = tpm_tis_isa_class_init, 159 .interfaces = (InterfaceInfo[]) { 160 { TYPE_TPM_IF }, 161 { } 162 } 163 }; 164 165 static void tpm_tis_isa_register(void) 166 { 167 type_register_static(&tpm_tis_isa_info); 168 } 169 170 type_init(tpm_tis_isa_register) 171