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, Family 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 #include "hw/acpi/acpi_aml_interface.h" 34 35 struct TPMStateISA { 36 /*< private >*/ 37 ISADevice parent_obj; 38 39 /*< public >*/ 40 TPMState state; /* not a QOM object */ 41 }; 42 43 OBJECT_DECLARE_SIMPLE_TYPE(TPMStateISA, TPM_TIS_ISA) 44 45 static int tpm_tis_pre_save_isa(void *opaque) 46 { 47 TPMStateISA *isadev = opaque; 48 49 return tpm_tis_pre_save(&isadev->state); 50 } 51 52 static const VMStateDescription vmstate_tpm_tis_isa = { 53 .name = "tpm-tis", 54 .version_id = 0, 55 .pre_save = tpm_tis_pre_save_isa, 56 .fields = (VMStateField[]) { 57 VMSTATE_BUFFER(state.buffer, TPMStateISA), 58 VMSTATE_UINT16(state.rw_offset, TPMStateISA), 59 VMSTATE_UINT8(state.active_locty, TPMStateISA), 60 VMSTATE_UINT8(state.aborting_locty, TPMStateISA), 61 VMSTATE_UINT8(state.next_locty, TPMStateISA), 62 63 VMSTATE_STRUCT_ARRAY(state.loc, TPMStateISA, TPM_TIS_NUM_LOCALITIES, 0, 64 vmstate_locty, TPMLocality), 65 66 VMSTATE_END_OF_LIST() 67 } 68 }; 69 70 static void tpm_tis_isa_request_completed(TPMIf *ti, int ret) 71 { 72 TPMStateISA *isadev = TPM_TIS_ISA(ti); 73 TPMState *s = &isadev->state; 74 75 tpm_tis_request_completed(s, ret); 76 } 77 78 static enum TPMVersion tpm_tis_isa_get_tpm_version(TPMIf *ti) 79 { 80 TPMStateISA *isadev = TPM_TIS_ISA(ti); 81 TPMState *s = &isadev->state; 82 83 return tpm_tis_get_tpm_version(s); 84 } 85 86 static void tpm_tis_isa_reset(DeviceState *dev) 87 { 88 TPMStateISA *isadev = TPM_TIS_ISA(dev); 89 TPMState *s = &isadev->state; 90 91 return tpm_tis_reset(s); 92 } 93 94 static Property tpm_tis_isa_properties[] = { 95 DEFINE_PROP_UINT32("irq", TPMStateISA, state.irq_num, TPM_TIS_IRQ), 96 DEFINE_PROP_TPMBE("tpmdev", TPMStateISA, state.be_driver), 97 DEFINE_PROP_BOOL("ppi", TPMStateISA, state.ppi_enabled, true), 98 DEFINE_PROP_END_OF_LIST(), 99 }; 100 101 static void tpm_tis_isa_initfn(Object *obj) 102 { 103 TPMStateISA *isadev = TPM_TIS_ISA(obj); 104 TPMState *s = &isadev->state; 105 106 memory_region_init_io(&s->mmio, obj, &tpm_tis_memory_ops, 107 s, "tpm-tis-mmio", 108 TPM_TIS_NUM_LOCALITIES << TPM_TIS_LOCALITY_SHIFT); 109 } 110 111 static void tpm_tis_isa_realizefn(DeviceState *dev, Error **errp) 112 { 113 TPMStateISA *isadev = TPM_TIS_ISA(dev); 114 TPMState *s = &isadev->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 if (s->irq_num > 15) { 126 error_setg(errp, "IRQ %d is outside valid range of 0 to 15", 127 s->irq_num); 128 return; 129 } 130 131 s->irq = isa_get_irq(ISA_DEVICE(dev), s->irq_num); 132 133 memory_region_add_subregion(isa_address_space(ISA_DEVICE(dev)), 134 TPM_TIS_ADDR_BASE, &s->mmio); 135 136 if (s->ppi_enabled) { 137 tpm_ppi_init(&s->ppi, isa_address_space(ISA_DEVICE(dev)), 138 TPM_PPI_ADDR_BASE, OBJECT(dev)); 139 } 140 } 141 142 static void build_tpm_tis_isa_aml(AcpiDevAmlIf *adev, Aml *scope) 143 { 144 Aml *dev, *crs; 145 TPMStateISA *isadev = TPM_TIS_ISA(adev); 146 TPMIf *ti = TPM_IF(isadev); 147 148 dev = aml_device("TPM"); 149 if (tpm_tis_isa_get_tpm_version(ti) == TPM_VERSION_2_0) { 150 aml_append(dev, aml_name_decl("_HID", aml_string("MSFT0101"))); 151 aml_append(dev, aml_name_decl("_STR", aml_string("TPM 2.0 Device"))); 152 } else { 153 aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0C31"))); 154 } 155 aml_append(dev, aml_name_decl("_UID", aml_int(1))); 156 aml_append(dev, aml_name_decl("_STA", aml_int(0xF))); 157 crs = aml_resource_template(); 158 aml_append(crs, aml_memory32_fixed(TPM_TIS_ADDR_BASE, TPM_TIS_ADDR_SIZE, 159 AML_READ_WRITE)); 160 /* 161 * FIXME: TPM_TIS_IRQ=5 conflicts with PNP0C0F irqs, 162 * fix default TPM_TIS_IRQ value there to use some unused IRQ 163 */ 164 /* aml_append(crs, aml_irq_no_flags(isadev->state.irq_num)); */ 165 aml_append(dev, aml_name_decl("_CRS", crs)); 166 tpm_build_ppi_acpi(ti, dev); 167 aml_append(scope, dev); 168 } 169 170 static void tpm_tis_isa_class_init(ObjectClass *klass, void *data) 171 { 172 DeviceClass *dc = DEVICE_CLASS(klass); 173 TPMIfClass *tc = TPM_IF_CLASS(klass); 174 AcpiDevAmlIfClass *adevc = ACPI_DEV_AML_IF_CLASS(klass); 175 176 device_class_set_props(dc, tpm_tis_isa_properties); 177 dc->vmsd = &vmstate_tpm_tis_isa; 178 tc->model = TPM_MODEL_TPM_TIS; 179 dc->realize = tpm_tis_isa_realizefn; 180 dc->reset = tpm_tis_isa_reset; 181 tc->request_completed = tpm_tis_isa_request_completed; 182 tc->get_version = tpm_tis_isa_get_tpm_version; 183 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 184 adevc->build_dev_aml = build_tpm_tis_isa_aml; 185 } 186 187 static const TypeInfo tpm_tis_isa_info = { 188 .name = TYPE_TPM_TIS_ISA, 189 .parent = TYPE_ISA_DEVICE, 190 .instance_size = sizeof(TPMStateISA), 191 .instance_init = tpm_tis_isa_initfn, 192 .class_init = tpm_tis_isa_class_init, 193 .interfaces = (InterfaceInfo[]) { 194 { TYPE_TPM_IF }, 195 { TYPE_ACPI_DEV_AML_IF }, 196 { } 197 } 198 }; 199 200 static void tpm_tis_isa_register(void) 201 { 202 type_register_static(&tpm_tis_isa_info); 203 } 204 205 type_init(tpm_tis_isa_register) 206