1 /*
2 * tpm_tis_sysbus.c - QEMU's TPM TIS SYSBUS 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/qdev-properties.h"
27 #include "migration/vmstate.h"
28 #include "hw/acpi/tpm.h"
29 #include "tpm_prop.h"
30 #include "hw/sysbus.h"
31 #include "tpm_tis.h"
32 #include "qom/object.h"
33
34 struct TPMStateSysBus {
35 /*< private >*/
36 SysBusDevice parent_obj;
37
38 /*< public >*/
39 TPMState state; /* not a QOM object */
40 };
41
OBJECT_DECLARE_SIMPLE_TYPE(TPMStateSysBus,TPM_TIS_SYSBUS)42 OBJECT_DECLARE_SIMPLE_TYPE(TPMStateSysBus, TPM_TIS_SYSBUS)
43
44 static int tpm_tis_pre_save_sysbus(void *opaque)
45 {
46 TPMStateSysBus *sbdev = opaque;
47
48 return tpm_tis_pre_save(&sbdev->state);
49 }
50
51 static const VMStateDescription vmstate_tpm_tis_sysbus = {
52 .name = "tpm-tis",
53 .version_id = 0,
54 .pre_save = tpm_tis_pre_save_sysbus,
55 .fields = (const VMStateField[]) {
56 VMSTATE_BUFFER(state.buffer, TPMStateSysBus),
57 VMSTATE_UINT16(state.rw_offset, TPMStateSysBus),
58 VMSTATE_UINT8(state.active_locty, TPMStateSysBus),
59 VMSTATE_UINT8(state.aborting_locty, TPMStateSysBus),
60 VMSTATE_UINT8(state.next_locty, TPMStateSysBus),
61
62 VMSTATE_STRUCT_ARRAY(state.loc, TPMStateSysBus, TPM_TIS_NUM_LOCALITIES,
63 0, vmstate_locty, TPMLocality),
64
65 VMSTATE_END_OF_LIST()
66 }
67 };
68
tpm_tis_sysbus_request_completed(TPMIf * ti,int ret)69 static void tpm_tis_sysbus_request_completed(TPMIf *ti, int ret)
70 {
71 TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(ti);
72 TPMState *s = &sbdev->state;
73
74 tpm_tis_request_completed(s, ret);
75 }
76
tpm_tis_sysbus_get_tpm_version(TPMIf * ti)77 static enum TPMVersion tpm_tis_sysbus_get_tpm_version(TPMIf *ti)
78 {
79 TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(ti);
80 TPMState *s = &sbdev->state;
81
82 return tpm_tis_get_tpm_version(s);
83 }
84
tpm_tis_sysbus_reset(DeviceState * dev)85 static void tpm_tis_sysbus_reset(DeviceState *dev)
86 {
87 TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(dev);
88 TPMState *s = &sbdev->state;
89
90 return tpm_tis_reset(s);
91 }
92
93 static const Property tpm_tis_sysbus_properties[] = {
94 DEFINE_PROP_UINT32("irq", TPMStateSysBus, state.irq_num, TPM_TIS_IRQ),
95 DEFINE_PROP_TPMBE("tpmdev", TPMStateSysBus, state.be_driver),
96 };
97
tpm_tis_sysbus_initfn(Object * obj)98 static void tpm_tis_sysbus_initfn(Object *obj)
99 {
100 TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(obj);
101 TPMState *s = &sbdev->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 sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
108 sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq);
109 }
110
tpm_tis_sysbus_realizefn(DeviceState * dev,Error ** errp)111 static void tpm_tis_sysbus_realizefn(DeviceState *dev, Error **errp)
112 {
113 TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(dev);
114 TPMState *s = &sbdev->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 }
126
tpm_tis_sysbus_class_init(ObjectClass * klass,const void * data)127 static void tpm_tis_sysbus_class_init(ObjectClass *klass, const void *data)
128 {
129 DeviceClass *dc = DEVICE_CLASS(klass);
130 TPMIfClass *tc = TPM_IF_CLASS(klass);
131
132 device_class_set_props(dc, tpm_tis_sysbus_properties);
133 dc->vmsd = &vmstate_tpm_tis_sysbus;
134 tc->model = TPM_MODEL_TPM_TIS;
135 dc->realize = tpm_tis_sysbus_realizefn;
136 device_class_set_legacy_reset(dc, tpm_tis_sysbus_reset);
137 tc->request_completed = tpm_tis_sysbus_request_completed;
138 tc->get_version = tpm_tis_sysbus_get_tpm_version;
139 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
140 }
141
142 static const TypeInfo tpm_tis_sysbus_info = {
143 .name = TYPE_TPM_TIS_SYSBUS,
144 .parent = TYPE_DYNAMIC_SYS_BUS_DEVICE,
145 .instance_size = sizeof(TPMStateSysBus),
146 .instance_init = tpm_tis_sysbus_initfn,
147 .class_init = tpm_tis_sysbus_class_init,
148 .interfaces = (const InterfaceInfo[]) {
149 { TYPE_TPM_IF },
150 { }
151 }
152 };
153
tpm_tis_sysbus_register(void)154 static void tpm_tis_sysbus_register(void)
155 {
156 type_register_static(&tpm_tis_sysbus_info);
157 }
158
159 type_init(tpm_tis_sysbus_register)
160