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 "hw/acpi/tpm.h" 30 #include "tpm_prop.h" 31 #include "tpm_tis.h" 32 33 typedef struct TPMStateISA { 34 /*< private >*/ 35 ISADevice parent_obj; 36 37 /*< public >*/ 38 TPMState state; /* not a QOM object */ 39 } TPMStateISA; 40 41 #define TPM_TIS_ISA(obj) OBJECT_CHECK(TPMStateISA, (obj), TYPE_TPM_TIS_ISA) 42 43 static int tpm_tis_pre_save_isa(void *opaque) 44 { 45 TPMStateISA *isadev = opaque; 46 47 return tpm_tis_pre_save(&isadev->state); 48 } 49 50 static const VMStateDescription vmstate_tpm_tis_isa = { 51 .name = "tpm-tis", 52 .version_id = 0, 53 .pre_save = tpm_tis_pre_save_isa, 54 .fields = (VMStateField[]) { 55 VMSTATE_BUFFER(state.buffer, TPMStateISA), 56 VMSTATE_UINT16(state.rw_offset, TPMStateISA), 57 VMSTATE_UINT8(state.active_locty, TPMStateISA), 58 VMSTATE_UINT8(state.aborting_locty, TPMStateISA), 59 VMSTATE_UINT8(state.next_locty, TPMStateISA), 60 61 VMSTATE_STRUCT_ARRAY(state.loc, TPMStateISA, TPM_TIS_NUM_LOCALITIES, 0, 62 vmstate_locty, TPMLocality), 63 64 VMSTATE_END_OF_LIST() 65 } 66 }; 67 68 static void tpm_tis_isa_request_completed(TPMIf *ti, int ret) 69 { 70 TPMStateISA *isadev = TPM_TIS_ISA(ti); 71 TPMState *s = &isadev->state; 72 73 tpm_tis_request_completed(s, ret); 74 } 75 76 static enum TPMVersion tpm_tis_isa_get_tpm_version(TPMIf *ti) 77 { 78 TPMStateISA *isadev = TPM_TIS_ISA(ti); 79 TPMState *s = &isadev->state; 80 81 return tpm_tis_get_tpm_version(s); 82 } 83 84 static void tpm_tis_isa_reset(DeviceState *dev) 85 { 86 TPMStateISA *isadev = TPM_TIS_ISA(dev); 87 TPMState *s = &isadev->state; 88 89 return tpm_tis_reset(s); 90 } 91 92 static Property tpm_tis_isa_properties[] = { 93 DEFINE_PROP_UINT32("irq", TPMStateISA, state.irq_num, TPM_TIS_IRQ), 94 DEFINE_PROP_TPMBE("tpmdev", TPMStateISA, state.be_driver), 95 DEFINE_PROP_BOOL("ppi", TPMStateISA, state.ppi_enabled, true), 96 DEFINE_PROP_END_OF_LIST(), 97 }; 98 99 static void tpm_tis_isa_initfn(Object *obj) 100 { 101 TPMStateISA *isadev = TPM_TIS_ISA(obj); 102 TPMState *s = &isadev->state; 103 104 memory_region_init_io(&s->mmio, obj, &tpm_tis_memory_ops, 105 s, "tpm-tis-mmio", 106 TPM_TIS_NUM_LOCALITIES << TPM_TIS_LOCALITY_SHIFT); 107 } 108 109 static void tpm_tis_isa_realizefn(DeviceState *dev, Error **errp) 110 { 111 TPMStateISA *isadev = TPM_TIS_ISA(dev); 112 TPMState *s = &isadev->state; 113 114 if (!tpm_find()) { 115 error_setg(errp, "at most one TPM device is permitted"); 116 return; 117 } 118 119 if (!s->be_driver) { 120 error_setg(errp, "'tpmdev' property is required"); 121 return; 122 } 123 if (s->irq_num > 15) { 124 error_setg(errp, "IRQ %d is outside valid range of 0 to 15", 125 s->irq_num); 126 return; 127 } 128 129 isa_init_irq(ISA_DEVICE(dev), &s->irq, s->irq_num); 130 131 memory_region_add_subregion(isa_address_space(ISA_DEVICE(dev)), 132 TPM_TIS_ADDR_BASE, &s->mmio); 133 134 if (s->ppi_enabled) { 135 tpm_ppi_init(&s->ppi, isa_address_space(ISA_DEVICE(dev)), 136 TPM_PPI_ADDR_BASE, OBJECT(dev)); 137 } 138 } 139 140 static void tpm_tis_isa_class_init(ObjectClass *klass, void *data) 141 { 142 DeviceClass *dc = DEVICE_CLASS(klass); 143 TPMIfClass *tc = TPM_IF_CLASS(klass); 144 145 device_class_set_props(dc, tpm_tis_isa_properties); 146 dc->vmsd = &vmstate_tpm_tis_isa; 147 tc->model = TPM_MODEL_TPM_TIS; 148 dc->realize = tpm_tis_isa_realizefn; 149 dc->reset = tpm_tis_isa_reset; 150 tc->request_completed = tpm_tis_isa_request_completed; 151 tc->get_version = tpm_tis_isa_get_tpm_version; 152 } 153 154 static const TypeInfo tpm_tis_isa_info = { 155 .name = TYPE_TPM_TIS_ISA, 156 .parent = TYPE_ISA_DEVICE, 157 .instance_size = sizeof(TPMStateISA), 158 .instance_init = tpm_tis_isa_initfn, 159 .class_init = tpm_tis_isa_class_init, 160 .interfaces = (InterfaceInfo[]) { 161 { TYPE_TPM_IF }, 162 { } 163 } 164 }; 165 166 static void tpm_tis_isa_register(void) 167 { 168 type_register_static(&tpm_tis_isa_info); 169 } 170 171 type_init(tpm_tis_isa_register) 172