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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); | |
0e43b7e6 | 28 | k->handle_request(s, (TPMBackendCmd *)data); |
b19a5eea AV |
29 | } |
30 | ||
31 | static void tpm_backend_thread_end(TPMBackend *s) | |
32 | { | |
33 | if (s->thread_pool) { | |
b19a5eea AV |
34 | g_thread_pool_free(s->thread_pool, FALSE, TRUE); |
35 | s->thread_pool = NULL; | |
36 | } | |
37 | } | |
8f0605cc SB |
38 | |
39 | enum TpmType tpm_backend_get_type(TPMBackend *s) | |
40 | { | |
41 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
42 | ||
d31076ba | 43 | return k->type; |
8f0605cc SB |
44 | } |
45 | ||
05a69998 | 46 | int tpm_backend_init(TPMBackend *s, TPMState *state) |
8f0605cc | 47 | { |
b19a5eea | 48 | s->tpm_state = state; |
93330cf5 | 49 | s->had_startup_error = false; |
b19a5eea | 50 | |
27a79d96 | 51 | return 0; |
8f0605cc SB |
52 | } |
53 | ||
54 | int tpm_backend_startup_tpm(TPMBackend *s) | |
55 | { | |
93330cf5 | 56 | int res = 0; |
8f0605cc SB |
57 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); |
58 | ||
b19a5eea AV |
59 | /* terminate a running TPM */ |
60 | tpm_backend_thread_end(s); | |
61 | ||
62 | s->thread_pool = g_thread_pool_new(tpm_backend_worker_thread, s, 1, TRUE, | |
63 | NULL); | |
b19a5eea | 64 | |
d31076ba | 65 | res = k->startup_tpm ? k->startup_tpm(s) : 0; |
93330cf5 AV |
66 | |
67 | s->had_startup_error = (res != 0); | |
68 | ||
69 | return res; | |
8f0605cc SB |
70 | } |
71 | ||
72 | bool tpm_backend_had_startup_error(TPMBackend *s) | |
73 | { | |
93330cf5 | 74 | return s->had_startup_error; |
8f0605cc SB |
75 | } |
76 | ||
0e43b7e6 | 77 | void tpm_backend_deliver_request(TPMBackend *s, TPMBackendCmd *cmd) |
8f0605cc | 78 | { |
0e43b7e6 | 79 | g_thread_pool_push(s->thread_pool, cmd, NULL); |
8f0605cc SB |
80 | } |
81 | ||
82 | void tpm_backend_reset(TPMBackend *s) | |
83 | { | |
84 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
85 | ||
d31076ba MAL |
86 | if (k->reset) { |
87 | k->reset(s); | |
93330cf5 | 88 | } |
b19a5eea AV |
89 | |
90 | tpm_backend_thread_end(s); | |
93330cf5 AV |
91 | |
92 | s->had_startup_error = false; | |
8f0605cc SB |
93 | } |
94 | ||
95 | void tpm_backend_cancel_cmd(TPMBackend *s) | |
96 | { | |
97 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
98 | ||
d31076ba | 99 | assert(k->cancel_cmd); |
93330cf5 | 100 | |
d31076ba | 101 | k->cancel_cmd(s); |
8f0605cc SB |
102 | } |
103 | ||
104 | bool tpm_backend_get_tpm_established_flag(TPMBackend *s) | |
105 | { | |
106 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
107 | ||
d31076ba MAL |
108 | return k->get_tpm_established_flag ? |
109 | k->get_tpm_established_flag(s) : false; | |
8f0605cc SB |
110 | } |
111 | ||
116694c3 SB |
112 | int tpm_backend_reset_tpm_established_flag(TPMBackend *s, uint8_t locty) |
113 | { | |
114 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
115 | ||
d31076ba MAL |
116 | return k->reset_tpm_established_flag ? |
117 | k->reset_tpm_established_flag(s, locty) : 0; | |
116694c3 SB |
118 | } |
119 | ||
120 | TPMVersion tpm_backend_get_tpm_version(TPMBackend *s) | |
121 | { | |
122 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
123 | ||
d31076ba | 124 | assert(k->get_tpm_version); |
93330cf5 | 125 | |
d31076ba | 126 | return k->get_tpm_version(s); |
116694c3 SB |
127 | } |
128 | ||
f59864ba AV |
129 | TPMInfo *tpm_backend_query_tpm(TPMBackend *s) |
130 | { | |
131 | TPMInfo *info = g_new0(TPMInfo, 1); | |
132 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
133 | ||
134 | info->id = g_strdup(s->id); | |
135 | info->model = s->fe_model; | |
d31076ba MAL |
136 | if (k->get_tpm_options) { |
137 | info->options = k->get_tpm_options(s); | |
138 | } | |
f59864ba AV |
139 | |
140 | return info; | |
141 | } | |
142 | ||
8f0605cc SB |
143 | static bool tpm_backend_prop_get_opened(Object *obj, Error **errp) |
144 | { | |
145 | TPMBackend *s = TPM_BACKEND(obj); | |
146 | ||
147 | return s->opened; | |
148 | } | |
149 | ||
150 | void tpm_backend_open(TPMBackend *s, Error **errp) | |
151 | { | |
152 | object_property_set_bool(OBJECT(s), true, "opened", errp); | |
153 | } | |
154 | ||
155 | static void tpm_backend_prop_set_opened(Object *obj, bool value, Error **errp) | |
156 | { | |
157 | TPMBackend *s = TPM_BACKEND(obj); | |
158 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
65cd9064 | 159 | Error *local_err = NULL; |
8f0605cc SB |
160 | |
161 | if (value == s->opened) { | |
162 | return; | |
163 | } | |
164 | ||
165 | if (!value && s->opened) { | |
c6bd8c70 | 166 | error_setg(errp, QERR_PERMISSION_DENIED); |
8f0605cc SB |
167 | return; |
168 | } | |
169 | ||
170 | if (k->opened) { | |
65cd9064 MA |
171 | k->opened(s, &local_err); |
172 | if (local_err) { | |
173 | error_propagate(errp, local_err); | |
174 | return; | |
175 | } | |
8f0605cc SB |
176 | } |
177 | ||
65cd9064 | 178 | s->opened = true; |
8f0605cc SB |
179 | } |
180 | ||
181 | static void tpm_backend_instance_init(Object *obj) | |
182 | { | |
f35fe5cb AV |
183 | TPMBackend *s = TPM_BACKEND(obj); |
184 | ||
8f0605cc SB |
185 | object_property_add_bool(obj, "opened", |
186 | tpm_backend_prop_get_opened, | |
187 | tpm_backend_prop_set_opened, | |
188 | NULL); | |
f35fe5cb | 189 | s->fe_model = -1; |
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 | |
f35fe5cb | 196 | g_free(s->id); |
b19a5eea | 197 | tpm_backend_thread_end(s); |
bdee56f5 PB |
198 | } |
199 | ||
8f0605cc SB |
200 | static const TypeInfo tpm_backend_info = { |
201 | .name = TYPE_TPM_BACKEND, | |
202 | .parent = TYPE_OBJECT, | |
203 | .instance_size = sizeof(TPMBackend), | |
204 | .instance_init = tpm_backend_instance_init, | |
b19a5eea | 205 | .instance_finalize = tpm_backend_instance_finalize, |
8f0605cc SB |
206 | .class_size = sizeof(TPMBackendClass), |
207 | .abstract = true, | |
208 | }; | |
209 | ||
698f5daa MAL |
210 | static const TypeInfo tpm_if_info = { |
211 | .name = TYPE_TPM_IF, | |
212 | .parent = TYPE_INTERFACE, | |
213 | .class_size = sizeof(TPMIfClass), | |
214 | }; | |
215 | ||
8f0605cc SB |
216 | static void register_types(void) |
217 | { | |
218 | type_register_static(&tpm_backend_info); | |
698f5daa | 219 | type_register_static(&tpm_if_info); |
8f0605cc SB |
220 | } |
221 | ||
222 | type_init(register_types); |