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Commit | Line | Data |
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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" | |
68999059 MAL |
21 | #include "qemu/main-loop.h" |
22 | ||
23 | static void tpm_backend_request_completed_bh(void *opaque) | |
24 | { | |
25 | TPMBackend *s = TPM_BACKEND(opaque); | |
26 | TPMIfClass *tic = TPM_IF_GET_CLASS(s->tpmif); | |
27 | ||
28 | tic->request_completed(s->tpmif); | |
29 | } | |
b19a5eea AV |
30 | |
31 | static void tpm_backend_worker_thread(gpointer data, gpointer user_data) | |
32 | { | |
33 | TPMBackend *s = TPM_BACKEND(user_data); | |
68999059 | 34 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); |
b19a5eea | 35 | |
0e43b7e6 | 36 | k->handle_request(s, (TPMBackendCmd *)data); |
68999059 MAL |
37 | |
38 | qemu_bh_schedule(s->bh); | |
b19a5eea AV |
39 | } |
40 | ||
41 | static void tpm_backend_thread_end(TPMBackend *s) | |
42 | { | |
43 | if (s->thread_pool) { | |
b19a5eea AV |
44 | g_thread_pool_free(s->thread_pool, FALSE, TRUE); |
45 | s->thread_pool = NULL; | |
46 | } | |
47 | } | |
8f0605cc SB |
48 | |
49 | enum TpmType tpm_backend_get_type(TPMBackend *s) | |
50 | { | |
51 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
52 | ||
d31076ba | 53 | return k->type; |
8f0605cc SB |
54 | } |
55 | ||
0bd6c8a9 | 56 | int tpm_backend_init(TPMBackend *s, TPMIf *tpmif, Error **errp) |
8f0605cc | 57 | { |
8a89c9ac | 58 | if (s->tpmif) { |
0bd6c8a9 | 59 | error_setg(errp, "TPM backend '%s' is already initialized", s->id); |
8a89c9ac MAL |
60 | return -1; |
61 | } | |
62 | ||
63 | s->tpmif = tpmif; | |
64 | object_ref(OBJECT(tpmif)); | |
65 | ||
93330cf5 | 66 | s->had_startup_error = false; |
b19a5eea | 67 | |
27a79d96 | 68 | return 0; |
8f0605cc SB |
69 | } |
70 | ||
9375c44f | 71 | int tpm_backend_startup_tpm(TPMBackend *s, size_t buffersize) |
8f0605cc | 72 | { |
93330cf5 | 73 | int res = 0; |
8f0605cc SB |
74 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); |
75 | ||
b19a5eea AV |
76 | /* terminate a running TPM */ |
77 | tpm_backend_thread_end(s); | |
78 | ||
79 | s->thread_pool = g_thread_pool_new(tpm_backend_worker_thread, s, 1, TRUE, | |
80 | NULL); | |
b19a5eea | 81 | |
9375c44f | 82 | res = k->startup_tpm ? k->startup_tpm(s, buffersize) : 0; |
93330cf5 AV |
83 | |
84 | s->had_startup_error = (res != 0); | |
85 | ||
86 | return res; | |
8f0605cc SB |
87 | } |
88 | ||
89 | bool tpm_backend_had_startup_error(TPMBackend *s) | |
90 | { | |
93330cf5 | 91 | return s->had_startup_error; |
8f0605cc SB |
92 | } |
93 | ||
0e43b7e6 | 94 | void tpm_backend_deliver_request(TPMBackend *s, TPMBackendCmd *cmd) |
8f0605cc | 95 | { |
0e43b7e6 | 96 | g_thread_pool_push(s->thread_pool, cmd, NULL); |
8f0605cc SB |
97 | } |
98 | ||
99 | void tpm_backend_reset(TPMBackend *s) | |
100 | { | |
101 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
102 | ||
d31076ba MAL |
103 | if (k->reset) { |
104 | k->reset(s); | |
93330cf5 | 105 | } |
b19a5eea AV |
106 | |
107 | tpm_backend_thread_end(s); | |
93330cf5 AV |
108 | |
109 | s->had_startup_error = false; | |
8f0605cc SB |
110 | } |
111 | ||
112 | void tpm_backend_cancel_cmd(TPMBackend *s) | |
113 | { | |
114 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
115 | ||
d31076ba | 116 | k->cancel_cmd(s); |
8f0605cc SB |
117 | } |
118 | ||
119 | bool tpm_backend_get_tpm_established_flag(TPMBackend *s) | |
120 | { | |
121 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
122 | ||
d31076ba MAL |
123 | return k->get_tpm_established_flag ? |
124 | k->get_tpm_established_flag(s) : false; | |
8f0605cc SB |
125 | } |
126 | ||
116694c3 SB |
127 | int tpm_backend_reset_tpm_established_flag(TPMBackend *s, uint8_t locty) |
128 | { | |
129 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
130 | ||
d31076ba MAL |
131 | return k->reset_tpm_established_flag ? |
132 | k->reset_tpm_established_flag(s, locty) : 0; | |
116694c3 SB |
133 | } |
134 | ||
135 | TPMVersion tpm_backend_get_tpm_version(TPMBackend *s) | |
136 | { | |
137 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
138 | ||
d31076ba | 139 | return k->get_tpm_version(s); |
116694c3 SB |
140 | } |
141 | ||
b21e6aaf SB |
142 | size_t tpm_backend_get_buffer_size(TPMBackend *s) |
143 | { | |
144 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
145 | ||
146 | return k->get_buffer_size(s); | |
147 | } | |
148 | ||
f59864ba AV |
149 | TPMInfo *tpm_backend_query_tpm(TPMBackend *s) |
150 | { | |
151 | TPMInfo *info = g_new0(TPMInfo, 1); | |
152 | TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); | |
191adc94 | 153 | TPMIfClass *tic = TPM_IF_GET_CLASS(s->tpmif); |
f59864ba AV |
154 | |
155 | info->id = g_strdup(s->id); | |
191adc94 | 156 | info->model = tic->model; |
ebca2df7 | 157 | info->options = k->get_tpm_options(s); |
f59864ba AV |
158 | |
159 | return info; | |
160 | } | |
161 | ||
8f0605cc SB |
162 | static void tpm_backend_instance_init(Object *obj) |
163 | { | |
f35fe5cb AV |
164 | TPMBackend *s = TPM_BACKEND(obj); |
165 | ||
68999059 | 166 | s->bh = qemu_bh_new(tpm_backend_request_completed_bh, s); |
bdee56f5 PB |
167 | } |
168 | ||
b19a5eea | 169 | static void tpm_backend_instance_finalize(Object *obj) |
bdee56f5 | 170 | { |
b19a5eea | 171 | TPMBackend *s = TPM_BACKEND(obj); |
bdee56f5 | 172 | |
8a89c9ac | 173 | object_unref(OBJECT(s->tpmif)); |
f35fe5cb | 174 | g_free(s->id); |
b19a5eea | 175 | tpm_backend_thread_end(s); |
68999059 | 176 | qemu_bh_delete(s->bh); |
bdee56f5 PB |
177 | } |
178 | ||
8f0605cc SB |
179 | static const TypeInfo tpm_backend_info = { |
180 | .name = TYPE_TPM_BACKEND, | |
181 | .parent = TYPE_OBJECT, | |
182 | .instance_size = sizeof(TPMBackend), | |
183 | .instance_init = tpm_backend_instance_init, | |
b19a5eea | 184 | .instance_finalize = tpm_backend_instance_finalize, |
8f0605cc SB |
185 | .class_size = sizeof(TPMBackendClass), |
186 | .abstract = true, | |
187 | }; | |
188 | ||
698f5daa MAL |
189 | static const TypeInfo tpm_if_info = { |
190 | .name = TYPE_TPM_IF, | |
191 | .parent = TYPE_INTERFACE, | |
192 | .class_size = sizeof(TPMIfClass), | |
193 | }; | |
194 | ||
8f0605cc SB |
195 | static void register_types(void) |
196 | { | |
197 | type_register_static(&tpm_backend_info); | |
698f5daa | 198 | type_register_static(&tpm_if_info); |
8f0605cc SB |
199 | } |
200 | ||
201 | type_init(register_types); |