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 #include "qom/object.h" 33 34 struct TPMStateISA { 35 /*< private >*/ 36 ISADevice parent_obj; 37 38 /*< public >*/ 39 TPMState state; /* not a QOM object */ 40 }; 41 42 OBJECT_DECLARE_SIMPLE_TYPE(TPMStateISA, TPM_TIS_ISA) 43 44 static int tpm_tis_pre_save_isa(void *opaque) 45 { 46 TPMStateISA *isadev = opaque; 47 48 return tpm_tis_pre_save(&isadev->state); 49 } 50 51 static const VMStateDescription vmstate_tpm_tis_isa = { 52 .name = "tpm-tis", 53 .version_id = 0, 54 .pre_save = tpm_tis_pre_save_isa, 55 .fields = (VMStateField[]) { 56 VMSTATE_BUFFER(state.buffer, TPMStateISA), 57 VMSTATE_UINT16(state.rw_offset, TPMStateISA), 58 VMSTATE_UINT8(state.active_locty, TPMStateISA), 59 VMSTATE_UINT8(state.aborting_locty, TPMStateISA), 60 VMSTATE_UINT8(state.next_locty, TPMStateISA), 61 62 VMSTATE_STRUCT_ARRAY(state.loc, TPMStateISA, TPM_TIS_NUM_LOCALITIES, 0, 63 vmstate_locty, TPMLocality), 64 65 VMSTATE_END_OF_LIST() 66 } 67 }; 68 69 static void tpm_tis_isa_request_completed(TPMIf *ti, int ret) 70 { 71 TPMStateISA *isadev = TPM_TIS_ISA(ti); 72 TPMState *s = &isadev->state; 73 74 tpm_tis_request_completed(s, ret); 75 } 76 77 static enum TPMVersion tpm_tis_isa_get_tpm_version(TPMIf *ti) 78 { 79 TPMStateISA *isadev = TPM_TIS_ISA(ti); 80 TPMState *s = &isadev->state; 81 82 return tpm_tis_get_tpm_version(s); 83 } 84 85 static void tpm_tis_isa_reset(DeviceState *dev) 86 { 87 TPMStateISA *isadev = TPM_TIS_ISA(dev); 88 TPMState *s = &isadev->state; 89 90 return tpm_tis_reset(s); 91 } 92 93 static Property tpm_tis_isa_properties[] = { 94 DEFINE_PROP_UINT32("irq", TPMStateISA, state.irq_num, TPM_TIS_IRQ), 95 DEFINE_PROP_TPMBE("tpmdev", TPMStateISA, state.be_driver), 96 DEFINE_PROP_BOOL("ppi", TPMStateISA, state.ppi_enabled, true), 97 DEFINE_PROP_END_OF_LIST(), 98 }; 99 100 static void tpm_tis_isa_initfn(Object *obj) 101 { 102 TPMStateISA *isadev = TPM_TIS_ISA(obj); 103 TPMState *s = &isadev->state; 104 105 memory_region_init_io(&s->mmio, obj, &tpm_tis_memory_ops, 106 s, "tpm-tis-mmio", 107 TPM_TIS_NUM_LOCALITIES << TPM_TIS_LOCALITY_SHIFT); 108 } 109 110 static void tpm_tis_isa_realizefn(DeviceState *dev, Error **errp) 111 { 112 TPMStateISA *isadev = TPM_TIS_ISA(dev); 113 TPMState *s = &isadev->state; 114 115 if (!tpm_find()) { 116 error_setg(errp, "at most one TPM device is permitted"); 117 return; 118 } 119 120 if (!s->be_driver) { 121 error_setg(errp, "'tpmdev' property is required"); 122 return; 123 } 124 if (s->irq_num > 15) { 125 error_setg(errp, "IRQ %d is outside valid range of 0 to 15", 126 s->irq_num); 127 return; 128 } 129 130 isa_init_irq(ISA_DEVICE(dev), &s->irq, s->irq_num); 131 132 memory_region_add_subregion(isa_address_space(ISA_DEVICE(dev)), 133 TPM_TIS_ADDR_BASE, &s->mmio); 134 135 if (s->ppi_enabled) { 136 tpm_ppi_init(&s->ppi, isa_address_space(ISA_DEVICE(dev)), 137 TPM_PPI_ADDR_BASE, OBJECT(dev)); 138 } 139 } 140 141 static void tpm_tis_isa_class_init(ObjectClass *klass, void *data) 142 { 143 DeviceClass *dc = DEVICE_CLASS(klass); 144 TPMIfClass *tc = TPM_IF_CLASS(klass); 145 146 device_class_set_props(dc, tpm_tis_isa_properties); 147 dc->vmsd = &vmstate_tpm_tis_isa; 148 tc->model = TPM_MODEL_TPM_TIS; 149 dc->realize = tpm_tis_isa_realizefn; 150 dc->reset = tpm_tis_isa_reset; 151 tc->request_completed = tpm_tis_isa_request_completed; 152 tc->get_version = tpm_tis_isa_get_tpm_version; 153 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 154 } 155 156 static const TypeInfo tpm_tis_isa_info = { 157 .name = TYPE_TPM_TIS_ISA, 158 .parent = TYPE_ISA_DEVICE, 159 .instance_size = sizeof(TPMStateISA), 160 .instance_init = tpm_tis_isa_initfn, 161 .class_init = tpm_tis_isa_class_init, 162 .interfaces = (InterfaceInfo[]) { 163 { TYPE_TPM_IF }, 164 { } 165 } 166 }; 167 168 static void tpm_tis_isa_register(void) 169 { 170 type_register_static(&tpm_tis_isa_info); 171 } 172 173 type_init(tpm_tis_isa_register) 174