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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, Familiy 2.0, Revision 00.43 | |
23 | */ | |
24 | ||
25 | #include "qemu/osdep.h" | |
26 | #include "hw/qdev-properties.h" | |
27 | #include "migration/vmstate.h" | |
40214766 | 28 | #include "hw/acpi/tpm.h" |
a3500613 | 29 | #include "tpm_prop.h" |
229de57a EA |
30 | #include "hw/sysbus.h" |
31 | #include "tpm_tis.h" | |
32 | ||
33 | typedef struct TPMStateSysBus { | |
34 | /*< private >*/ | |
35 | SysBusDevice parent_obj; | |
36 | ||
37 | /*< public >*/ | |
38 | TPMState state; /* not a QOM object */ | |
39 | } TPMStateSysBus; | |
40 | ||
41 | #define TPM_TIS_SYSBUS(obj) OBJECT_CHECK(TPMStateSysBus, (obj), TYPE_TPM_TIS_SYSBUS) | |
42 | ||
43 | static int tpm_tis_pre_save_sysbus(void *opaque) | |
44 | { | |
45 | TPMStateSysBus *sbdev = opaque; | |
46 | ||
47 | return tpm_tis_pre_save(&sbdev->state); | |
48 | } | |
49 | ||
50 | static const VMStateDescription vmstate_tpm_tis_sysbus = { | |
51 | .name = "tpm-tis", | |
52 | .version_id = 0, | |
53 | .pre_save = tpm_tis_pre_save_sysbus, | |
54 | .fields = (VMStateField[]) { | |
55 | VMSTATE_BUFFER(state.buffer, TPMStateSysBus), | |
56 | VMSTATE_UINT16(state.rw_offset, TPMStateSysBus), | |
57 | VMSTATE_UINT8(state.active_locty, TPMStateSysBus), | |
58 | VMSTATE_UINT8(state.aborting_locty, TPMStateSysBus), | |
59 | VMSTATE_UINT8(state.next_locty, TPMStateSysBus), | |
60 | ||
61 | VMSTATE_STRUCT_ARRAY(state.loc, TPMStateSysBus, TPM_TIS_NUM_LOCALITIES, | |
62 | 0, vmstate_locty, TPMLocality), | |
63 | ||
64 | VMSTATE_END_OF_LIST() | |
65 | } | |
66 | }; | |
67 | ||
68 | static void tpm_tis_sysbus_request_completed(TPMIf *ti, int ret) | |
69 | { | |
70 | TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(ti); | |
71 | TPMState *s = &sbdev->state; | |
72 | ||
73 | tpm_tis_request_completed(s, ret); | |
74 | } | |
75 | ||
76 | static enum TPMVersion tpm_tis_sysbus_get_tpm_version(TPMIf *ti) | |
77 | { | |
78 | TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(ti); | |
79 | TPMState *s = &sbdev->state; | |
80 | ||
81 | return tpm_tis_get_tpm_version(s); | |
82 | } | |
83 | ||
84 | static void tpm_tis_sysbus_reset(DeviceState *dev) | |
85 | { | |
86 | TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(dev); | |
87 | TPMState *s = &sbdev->state; | |
88 | ||
89 | return tpm_tis_reset(s); | |
90 | } | |
91 | ||
92 | static Property tpm_tis_sysbus_properties[] = { | |
93 | DEFINE_PROP_UINT32("irq", TPMStateSysBus, state.irq_num, TPM_TIS_IRQ), | |
94 | DEFINE_PROP_TPMBE("tpmdev", TPMStateSysBus, state.be_driver), | |
ca14ba5b | 95 | DEFINE_PROP_BOOL("ppi", TPMStateSysBus, state.ppi_enabled, false), |
229de57a EA |
96 | DEFINE_PROP_END_OF_LIST(), |
97 | }; | |
98 | ||
99 | static void tpm_tis_sysbus_initfn(Object *obj) | |
100 | { | |
101 | TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(obj); | |
102 | TPMState *s = &sbdev->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 | sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio); | |
109 | sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq); | |
110 | } | |
111 | ||
112 | static void tpm_tis_sysbus_realizefn(DeviceState *dev, Error **errp) | |
113 | { | |
114 | TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(dev); | |
115 | TPMState *s = &sbdev->state; | |
116 | ||
117 | if (!tpm_find()) { | |
118 | error_setg(errp, "at most one TPM device is permitted"); | |
119 | return; | |
120 | } | |
121 | ||
122 | if (!s->be_driver) { | |
123 | error_setg(errp, "'tpmdev' property is required"); | |
124 | return; | |
125 | } | |
126 | } | |
127 | ||
128 | static void tpm_tis_sysbus_class_init(ObjectClass *klass, void *data) | |
129 | { | |
130 | DeviceClass *dc = DEVICE_CLASS(klass); | |
131 | TPMIfClass *tc = TPM_IF_CLASS(klass); | |
132 | ||
133 | device_class_set_props(dc, tpm_tis_sysbus_properties); | |
134 | dc->vmsd = &vmstate_tpm_tis_sysbus; | |
135 | tc->model = TPM_MODEL_TPM_TIS; | |
136 | dc->realize = tpm_tis_sysbus_realizefn; | |
137 | dc->user_creatable = true; | |
138 | dc->reset = tpm_tis_sysbus_reset; | |
139 | tc->request_completed = tpm_tis_sysbus_request_completed; | |
140 | tc->get_version = tpm_tis_sysbus_get_tpm_version; | |
141 | } | |
142 | ||
143 | static const TypeInfo tpm_tis_sysbus_info = { | |
144 | .name = TYPE_TPM_TIS_SYSBUS, | |
145 | .parent = TYPE_SYS_BUS_DEVICE, | |
146 | .instance_size = sizeof(TPMStateSysBus), | |
147 | .instance_init = tpm_tis_sysbus_initfn, | |
148 | .class_init = tpm_tis_sysbus_class_init, | |
149 | .interfaces = (InterfaceInfo[]) { | |
150 | { TYPE_TPM_IF }, | |
151 | { } | |
152 | } | |
153 | }; | |
154 | ||
155 | static void tpm_tis_sysbus_register(void) | |
156 | { | |
157 | type_register_static(&tpm_tis_sysbus_info); | |
158 | } | |
159 | ||
160 | type_init(tpm_tis_sysbus_register) |