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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" |
da34e65c | 17 | #include "qapi/error.h" |
8f0605cc | 18 | #include "qapi/qmp/qerror.h" |
bdee56f5 PB |
19 | #include "sysemu/tpm.h" |
20 | #include "qemu/thread.h" | |
b19a5eea AV |
21 | |
22 | static void tpm_backend_worker_thread(gpointer data, gpointer user_data) | |
23 | { | |
24 | TPMBackend *s = TPM_BACKEND(user_data); | |
25 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
26 | ||
27 | assert(k->handle_request != NULL); | |
28 | k->handle_request(s, (TPMBackendCmd)data); | |
29 | } | |
30 | ||
31 | static void tpm_backend_thread_end(TPMBackend *s) | |
32 | { | |
33 | if (s->thread_pool) { | |
34 | g_thread_pool_push(s->thread_pool, (gpointer)TPM_BACKEND_CMD_END, NULL); | |
35 | g_thread_pool_free(s->thread_pool, FALSE, TRUE); | |
36 | s->thread_pool = NULL; | |
37 | } | |
38 | } | |
8f0605cc SB |
39 | |
40 | enum TpmType tpm_backend_get_type(TPMBackend *s) | |
41 | { | |
42 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
43 | ||
44 | return k->ops->type; | |
45 | } | |
46 | ||
47 | const char *tpm_backend_get_desc(TPMBackend *s) | |
48 | { | |
49 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
50 | ||
51 | return k->ops->desc(); | |
52 | } | |
53 | ||
54 | void tpm_backend_destroy(TPMBackend *s) | |
55 | { | |
56 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
57 | ||
9c80d953 | 58 | k->ops->destroy(s); |
b19a5eea AV |
59 | |
60 | tpm_backend_thread_end(s); | |
8f0605cc SB |
61 | } |
62 | ||
63 | int tpm_backend_init(TPMBackend *s, TPMState *state, | |
64 | TPMRecvDataCB *datacb) | |
65 | { | |
66 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
67 | ||
b19a5eea AV |
68 | s->tpm_state = state; |
69 | s->recv_data_callback = datacb; | |
70 | ||
71 | return k->ops->init(s); | |
8f0605cc SB |
72 | } |
73 | ||
74 | int tpm_backend_startup_tpm(TPMBackend *s) | |
75 | { | |
76 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
77 | ||
b19a5eea AV |
78 | /* terminate a running TPM */ |
79 | tpm_backend_thread_end(s); | |
80 | ||
81 | s->thread_pool = g_thread_pool_new(tpm_backend_worker_thread, s, 1, TRUE, | |
82 | NULL); | |
83 | g_thread_pool_push(s->thread_pool, (gpointer)TPM_BACKEND_CMD_INIT, NULL); | |
84 | ||
8f0605cc SB |
85 | return k->ops->startup_tpm(s); |
86 | } | |
87 | ||
88 | bool tpm_backend_had_startup_error(TPMBackend *s) | |
89 | { | |
90 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
91 | ||
92 | return k->ops->had_startup_error(s); | |
93 | } | |
94 | ||
95 | size_t tpm_backend_realloc_buffer(TPMBackend *s, TPMSizedBuffer *sb) | |
96 | { | |
97 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
98 | ||
99 | return k->ops->realloc_buffer(sb); | |
100 | } | |
101 | ||
102 | void tpm_backend_deliver_request(TPMBackend *s) | |
103 | { | |
b19a5eea AV |
104 | g_thread_pool_push(s->thread_pool, (gpointer)TPM_BACKEND_CMD_PROCESS_CMD, |
105 | NULL); | |
8f0605cc SB |
106 | } |
107 | ||
108 | void tpm_backend_reset(TPMBackend *s) | |
109 | { | |
110 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
111 | ||
112 | k->ops->reset(s); | |
b19a5eea AV |
113 | |
114 | tpm_backend_thread_end(s); | |
8f0605cc SB |
115 | } |
116 | ||
117 | void tpm_backend_cancel_cmd(TPMBackend *s) | |
118 | { | |
119 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
120 | ||
121 | k->ops->cancel_cmd(s); | |
122 | } | |
123 | ||
124 | bool tpm_backend_get_tpm_established_flag(TPMBackend *s) | |
125 | { | |
126 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
127 | ||
128 | return k->ops->get_tpm_established_flag(s); | |
129 | } | |
130 | ||
116694c3 SB |
131 | int tpm_backend_reset_tpm_established_flag(TPMBackend *s, uint8_t locty) |
132 | { | |
133 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
134 | ||
135 | return k->ops->reset_tpm_established_flag(s, locty); | |
136 | } | |
137 | ||
138 | TPMVersion tpm_backend_get_tpm_version(TPMBackend *s) | |
139 | { | |
140 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
141 | ||
142 | return k->ops->get_tpm_version(s); | |
143 | } | |
144 | ||
8f0605cc SB |
145 | static bool tpm_backend_prop_get_opened(Object *obj, Error **errp) |
146 | { | |
147 | TPMBackend *s = TPM_BACKEND(obj); | |
148 | ||
149 | return s->opened; | |
150 | } | |
151 | ||
152 | void tpm_backend_open(TPMBackend *s, Error **errp) | |
153 | { | |
154 | object_property_set_bool(OBJECT(s), true, "opened", errp); | |
155 | } | |
156 | ||
157 | static void tpm_backend_prop_set_opened(Object *obj, bool value, Error **errp) | |
158 | { | |
159 | TPMBackend *s = TPM_BACKEND(obj); | |
160 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
65cd9064 | 161 | Error *local_err = NULL; |
8f0605cc SB |
162 | |
163 | if (value == s->opened) { | |
164 | return; | |
165 | } | |
166 | ||
167 | if (!value && s->opened) { | |
c6bd8c70 | 168 | error_setg(errp, QERR_PERMISSION_DENIED); |
8f0605cc SB |
169 | return; |
170 | } | |
171 | ||
172 | if (k->opened) { | |
65cd9064 MA |
173 | k->opened(s, &local_err); |
174 | if (local_err) { | |
175 | error_propagate(errp, local_err); | |
176 | return; | |
177 | } | |
8f0605cc SB |
178 | } |
179 | ||
65cd9064 | 180 | s->opened = true; |
8f0605cc SB |
181 | } |
182 | ||
183 | static void tpm_backend_instance_init(Object *obj) | |
184 | { | |
185 | object_property_add_bool(obj, "opened", | |
186 | tpm_backend_prop_get_opened, | |
187 | tpm_backend_prop_set_opened, | |
188 | NULL); | |
8f0605cc | 189 | |
bdee56f5 PB |
190 | } |
191 | ||
b19a5eea | 192 | static void tpm_backend_instance_finalize(Object *obj) |
bdee56f5 | 193 | { |
b19a5eea | 194 | TPMBackend *s = TPM_BACKEND(obj); |
bdee56f5 | 195 | |
b19a5eea | 196 | tpm_backend_thread_end(s); |
bdee56f5 PB |
197 | } |
198 | ||
8f0605cc SB |
199 | static const TypeInfo tpm_backend_info = { |
200 | .name = TYPE_TPM_BACKEND, | |
201 | .parent = TYPE_OBJECT, | |
202 | .instance_size = sizeof(TPMBackend), | |
203 | .instance_init = tpm_backend_instance_init, | |
b19a5eea | 204 | .instance_finalize = tpm_backend_instance_finalize, |
8f0605cc SB |
205 | .class_size = sizeof(TPMBackendClass), |
206 | .abstract = true, | |
207 | }; | |
208 | ||
209 | static void register_types(void) | |
210 | { | |
211 | type_register_static(&tpm_backend_info); | |
212 | } | |
213 | ||
214 | type_init(register_types); |