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
tpm_tis_pre_save_isa(void * opaque)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
tpm_tis_isa_request_completed(TPMIf * ti,int ret)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
tpm_tis_isa_get_tpm_version(TPMIf * ti)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
tpm_tis_isa_reset(DeviceState * dev)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
tpm_tis_isa_initfn(Object * obj)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
tpm_tis_isa_realizefn(DeviceState * dev,Error ** errp)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
tpm_tis_isa_class_init(ObjectClass * klass,void * data)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
tpm_tis_isa_register(void)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