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1 | /* |
2 | * QEMU TPM Backend | |
3 | * | |
4 | * Copyright IBM, Corp. 2013 | |
5 | * | |
6 | * Authors: | |
7 | * Stefan Berger <stefanb@us.ibm.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2 or later. | |
10 | * See the COPYING file in the top-level directory. | |
11 | * | |
12 | * Based on backends/rng.c by Anthony Liguori | |
13 | */ | |
14 | ||
15 | #include "backends/tpm.h" | |
16 | #include "tpm/tpm_int.h" | |
17 | #include "qapi/qmp/qerror.h" | |
18 | ||
19 | enum TpmType tpm_backend_get_type(TPMBackend *s) | |
20 | { | |
21 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
22 | ||
23 | return k->ops->type; | |
24 | } | |
25 | ||
26 | const char *tpm_backend_get_desc(TPMBackend *s) | |
27 | { | |
28 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
29 | ||
30 | return k->ops->desc(); | |
31 | } | |
32 | ||
33 | void tpm_backend_destroy(TPMBackend *s) | |
34 | { | |
35 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
36 | ||
37 | return k->ops->destroy(s); | |
38 | } | |
39 | ||
40 | int tpm_backend_init(TPMBackend *s, TPMState *state, | |
41 | TPMRecvDataCB *datacb) | |
42 | { | |
43 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
44 | ||
45 | return k->ops->init(s, state, datacb); | |
46 | } | |
47 | ||
48 | int tpm_backend_startup_tpm(TPMBackend *s) | |
49 | { | |
50 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
51 | ||
52 | return k->ops->startup_tpm(s); | |
53 | } | |
54 | ||
55 | bool tpm_backend_had_startup_error(TPMBackend *s) | |
56 | { | |
57 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
58 | ||
59 | return k->ops->had_startup_error(s); | |
60 | } | |
61 | ||
62 | size_t tpm_backend_realloc_buffer(TPMBackend *s, TPMSizedBuffer *sb) | |
63 | { | |
64 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
65 | ||
66 | return k->ops->realloc_buffer(sb); | |
67 | } | |
68 | ||
69 | void tpm_backend_deliver_request(TPMBackend *s) | |
70 | { | |
71 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
72 | ||
73 | k->ops->deliver_request(s); | |
74 | } | |
75 | ||
76 | void tpm_backend_reset(TPMBackend *s) | |
77 | { | |
78 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
79 | ||
80 | k->ops->reset(s); | |
81 | } | |
82 | ||
83 | void tpm_backend_cancel_cmd(TPMBackend *s) | |
84 | { | |
85 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
86 | ||
87 | k->ops->cancel_cmd(s); | |
88 | } | |
89 | ||
90 | bool tpm_backend_get_tpm_established_flag(TPMBackend *s) | |
91 | { | |
92 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
93 | ||
94 | return k->ops->get_tpm_established_flag(s); | |
95 | } | |
96 | ||
97 | static bool tpm_backend_prop_get_opened(Object *obj, Error **errp) | |
98 | { | |
99 | TPMBackend *s = TPM_BACKEND(obj); | |
100 | ||
101 | return s->opened; | |
102 | } | |
103 | ||
104 | void tpm_backend_open(TPMBackend *s, Error **errp) | |
105 | { | |
106 | object_property_set_bool(OBJECT(s), true, "opened", errp); | |
107 | } | |
108 | ||
109 | static void tpm_backend_prop_set_opened(Object *obj, bool value, Error **errp) | |
110 | { | |
111 | TPMBackend *s = TPM_BACKEND(obj); | |
112 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
113 | ||
114 | if (value == s->opened) { | |
115 | return; | |
116 | } | |
117 | ||
118 | if (!value && s->opened) { | |
119 | error_set(errp, QERR_PERMISSION_DENIED); | |
120 | return; | |
121 | } | |
122 | ||
123 | if (k->opened) { | |
124 | k->opened(s, errp); | |
125 | } | |
126 | ||
127 | if (!error_is_set(errp)) { | |
128 | s->opened = value; | |
129 | } | |
130 | } | |
131 | ||
132 | static void tpm_backend_instance_init(Object *obj) | |
133 | { | |
134 | object_property_add_bool(obj, "opened", | |
135 | tpm_backend_prop_get_opened, | |
136 | tpm_backend_prop_set_opened, | |
137 | NULL); | |
138 | } | |
139 | ||
140 | static const TypeInfo tpm_backend_info = { | |
141 | .name = TYPE_TPM_BACKEND, | |
142 | .parent = TYPE_OBJECT, | |
143 | .instance_size = sizeof(TPMBackend), | |
144 | .instance_init = tpm_backend_instance_init, | |
145 | .class_size = sizeof(TPMBackendClass), | |
146 | .abstract = true, | |
147 | }; | |
148 | ||
149 | static void register_types(void) | |
150 | { | |
151 | type_register_static(&tpm_backend_info); | |
152 | } | |
153 | ||
154 | type_init(register_types); |