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8f0605cc SB |
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 | ||
9c058332 | 15 | #include "qemu/osdep.h" |
dccfcd0e | 16 | #include "sysemu/tpm_backend.h" |
8f0605cc | 17 | #include "qapi/qmp/qerror.h" |
bdee56f5 PB |
18 | #include "sysemu/tpm.h" |
19 | #include "qemu/thread.h" | |
20 | #include "sysemu/tpm_backend_int.h" | |
8f0605cc SB |
21 | |
22 | enum TpmType tpm_backend_get_type(TPMBackend *s) | |
23 | { | |
24 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
25 | ||
26 | return k->ops->type; | |
27 | } | |
28 | ||
29 | const char *tpm_backend_get_desc(TPMBackend *s) | |
30 | { | |
31 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
32 | ||
33 | return k->ops->desc(); | |
34 | } | |
35 | ||
36 | void tpm_backend_destroy(TPMBackend *s) | |
37 | { | |
38 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
39 | ||
9c80d953 | 40 | k->ops->destroy(s); |
8f0605cc SB |
41 | } |
42 | ||
43 | int tpm_backend_init(TPMBackend *s, TPMState *state, | |
44 | TPMRecvDataCB *datacb) | |
45 | { | |
46 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
47 | ||
48 | return k->ops->init(s, state, datacb); | |
49 | } | |
50 | ||
51 | int tpm_backend_startup_tpm(TPMBackend *s) | |
52 | { | |
53 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
54 | ||
55 | return k->ops->startup_tpm(s); | |
56 | } | |
57 | ||
58 | bool tpm_backend_had_startup_error(TPMBackend *s) | |
59 | { | |
60 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
61 | ||
62 | return k->ops->had_startup_error(s); | |
63 | } | |
64 | ||
65 | size_t tpm_backend_realloc_buffer(TPMBackend *s, TPMSizedBuffer *sb) | |
66 | { | |
67 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
68 | ||
69 | return k->ops->realloc_buffer(sb); | |
70 | } | |
71 | ||
72 | void tpm_backend_deliver_request(TPMBackend *s) | |
73 | { | |
74 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
75 | ||
76 | k->ops->deliver_request(s); | |
77 | } | |
78 | ||
79 | void tpm_backend_reset(TPMBackend *s) | |
80 | { | |
81 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
82 | ||
83 | k->ops->reset(s); | |
84 | } | |
85 | ||
86 | void tpm_backend_cancel_cmd(TPMBackend *s) | |
87 | { | |
88 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
89 | ||
90 | k->ops->cancel_cmd(s); | |
91 | } | |
92 | ||
93 | bool tpm_backend_get_tpm_established_flag(TPMBackend *s) | |
94 | { | |
95 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
96 | ||
97 | return k->ops->get_tpm_established_flag(s); | |
98 | } | |
99 | ||
116694c3 SB |
100 | int tpm_backend_reset_tpm_established_flag(TPMBackend *s, uint8_t locty) |
101 | { | |
102 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
103 | ||
104 | return k->ops->reset_tpm_established_flag(s, locty); | |
105 | } | |
106 | ||
107 | TPMVersion tpm_backend_get_tpm_version(TPMBackend *s) | |
108 | { | |
109 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
110 | ||
111 | return k->ops->get_tpm_version(s); | |
112 | } | |
113 | ||
8f0605cc SB |
114 | static bool tpm_backend_prop_get_opened(Object *obj, Error **errp) |
115 | { | |
116 | TPMBackend *s = TPM_BACKEND(obj); | |
117 | ||
118 | return s->opened; | |
119 | } | |
120 | ||
121 | void tpm_backend_open(TPMBackend *s, Error **errp) | |
122 | { | |
123 | object_property_set_bool(OBJECT(s), true, "opened", errp); | |
124 | } | |
125 | ||
126 | static void tpm_backend_prop_set_opened(Object *obj, bool value, Error **errp) | |
127 | { | |
128 | TPMBackend *s = TPM_BACKEND(obj); | |
129 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
65cd9064 | 130 | Error *local_err = NULL; |
8f0605cc SB |
131 | |
132 | if (value == s->opened) { | |
133 | return; | |
134 | } | |
135 | ||
136 | if (!value && s->opened) { | |
c6bd8c70 | 137 | error_setg(errp, QERR_PERMISSION_DENIED); |
8f0605cc SB |
138 | return; |
139 | } | |
140 | ||
141 | if (k->opened) { | |
65cd9064 MA |
142 | k->opened(s, &local_err); |
143 | if (local_err) { | |
144 | error_propagate(errp, local_err); | |
145 | return; | |
146 | } | |
8f0605cc SB |
147 | } |
148 | ||
65cd9064 | 149 | s->opened = true; |
8f0605cc SB |
150 | } |
151 | ||
152 | static void tpm_backend_instance_init(Object *obj) | |
153 | { | |
154 | object_property_add_bool(obj, "opened", | |
155 | tpm_backend_prop_get_opened, | |
156 | tpm_backend_prop_set_opened, | |
157 | NULL); | |
158 | } | |
159 | ||
bdee56f5 PB |
160 | void tpm_backend_thread_deliver_request(TPMBackendThread *tbt) |
161 | { | |
162 | g_thread_pool_push(tbt->pool, (gpointer)TPM_BACKEND_CMD_PROCESS_CMD, NULL); | |
163 | } | |
164 | ||
165 | void tpm_backend_thread_create(TPMBackendThread *tbt, | |
166 | GFunc func, gpointer user_data) | |
167 | { | |
168 | if (!tbt->pool) { | |
169 | tbt->pool = g_thread_pool_new(func, user_data, 1, TRUE, NULL); | |
170 | g_thread_pool_push(tbt->pool, (gpointer)TPM_BACKEND_CMD_INIT, NULL); | |
171 | } | |
172 | } | |
173 | ||
174 | void tpm_backend_thread_end(TPMBackendThread *tbt) | |
175 | { | |
176 | if (tbt->pool) { | |
177 | g_thread_pool_push(tbt->pool, (gpointer)TPM_BACKEND_CMD_END, NULL); | |
178 | g_thread_pool_free(tbt->pool, FALSE, TRUE); | |
179 | tbt->pool = NULL; | |
180 | } | |
181 | } | |
182 | ||
8f0605cc SB |
183 | static const TypeInfo tpm_backend_info = { |
184 | .name = TYPE_TPM_BACKEND, | |
185 | .parent = TYPE_OBJECT, | |
186 | .instance_size = sizeof(TPMBackend), | |
187 | .instance_init = tpm_backend_instance_init, | |
188 | .class_size = sizeof(TPMBackendClass), | |
189 | .abstract = true, | |
190 | }; | |
191 | ||
192 | static void register_types(void) | |
193 | { | |
194 | type_register_static(&tpm_backend_info); | |
195 | } | |
196 | ||
197 | type_init(register_types); |