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d1a0cf73 SB |
1 | /* |
2 | * TPM configuration | |
3 | * | |
4 | * Copyright (C) 2011-2013 IBM Corporation | |
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 net.c | |
13 | */ | |
d38ea87a | 14 | #include "qemu/osdep.h" |
d1a0cf73 | 15 | |
d1a0cf73 | 16 | #include "qapi/qmp/qerror.h" |
dccfcd0e | 17 | #include "sysemu/tpm_backend.h" |
bdee56f5 | 18 | #include "sysemu/tpm.h" |
d1a0cf73 | 19 | #include "qemu/config-file.h" |
d49b6836 | 20 | #include "qemu/error-report.h" |
d1a0cf73 SB |
21 | #include "qmp-commands.h" |
22 | ||
23 | static QLIST_HEAD(, TPMBackend) tpm_backends = | |
24 | QLIST_HEAD_INITIALIZER(tpm_backends); | |
25 | ||
a9a72aee | 26 | static TPMDriverOps const *be_drivers[TPM_TYPE__MAX]; |
00bbf50a | 27 | static bool tpm_models[TPM_MODEL__MAX]; |
d1a0cf73 | 28 | |
00bbf50a | 29 | void tpm_register_model(enum TpmModel model) |
d1a0cf73 | 30 | { |
00bbf50a | 31 | tpm_models[model] = true; |
d1a0cf73 | 32 | } |
4549a8b7 | 33 | |
d1a0cf73 SB |
34 | const TPMDriverOps *tpm_get_backend_driver(const char *type) |
35 | { | |
f7abe0ec | 36 | int i = qapi_enum_parse(&TpmType_lookup, type, -1, NULL); |
d1a0cf73 | 37 | |
a9a72aee | 38 | return i >= 0 ? be_drivers[i] : NULL; |
d1a0cf73 SB |
39 | } |
40 | ||
41 | #ifdef CONFIG_TPM | |
42 | ||
a9a72aee | 43 | void tpm_register_driver(const TPMDriverOps *tdo) |
d1a0cf73 | 44 | { |
a9a72aee | 45 | assert(!be_drivers[tdo->type]); |
d1a0cf73 | 46 | |
a9a72aee | 47 | be_drivers[tdo->type] = tdo; |
d1a0cf73 SB |
48 | } |
49 | ||
50 | /* | |
51 | * Walk the list of available TPM backend drivers and display them on the | |
52 | * screen. | |
53 | */ | |
bdee56f5 | 54 | static void tpm_display_backend_drivers(void) |
d1a0cf73 SB |
55 | { |
56 | int i; | |
57 | ||
58 | fprintf(stderr, "Supported TPM types (choose only one):\n"); | |
59 | ||
a9a72aee MAL |
60 | for (i = 0; i < TPM_TYPE__MAX; i++) { |
61 | if (be_drivers[i] == NULL) { | |
62 | continue; | |
63 | } | |
d1a0cf73 | 64 | fprintf(stderr, "%12s %s\n", |
93330cf5 | 65 | TpmType_str(i), be_drivers[i]->desc); |
d1a0cf73 SB |
66 | } |
67 | fprintf(stderr, "\n"); | |
68 | } | |
69 | ||
70 | /* | |
71 | * Find the TPM with the given Id | |
72 | */ | |
73 | TPMBackend *qemu_find_tpm(const char *id) | |
74 | { | |
75 | TPMBackend *drv; | |
76 | ||
77 | if (id) { | |
78 | QLIST_FOREACH(drv, &tpm_backends, list) { | |
79 | if (!strcmp(drv->id, id)) { | |
80 | return drv; | |
81 | } | |
82 | } | |
83 | } | |
84 | ||
85 | return NULL; | |
86 | } | |
87 | ||
88 | static int configure_tpm(QemuOpts *opts) | |
89 | { | |
90 | const char *value; | |
91 | const char *id; | |
92 | const TPMDriverOps *be; | |
93 | TPMBackend *drv; | |
8f0605cc | 94 | Error *local_err = NULL; |
d1a0cf73 SB |
95 | |
96 | if (!QLIST_EMPTY(&tpm_backends)) { | |
27215a22 | 97 | error_report("Only one TPM is allowed."); |
d1a0cf73 SB |
98 | return 1; |
99 | } | |
100 | ||
101 | id = qemu_opts_id(opts); | |
102 | if (id == NULL) { | |
8b53a196 | 103 | error_report(QERR_MISSING_PARAMETER, "id"); |
d1a0cf73 SB |
104 | return 1; |
105 | } | |
106 | ||
107 | value = qemu_opt_get(opts, "type"); | |
108 | if (!value) { | |
8b53a196 | 109 | error_report(QERR_MISSING_PARAMETER, "type"); |
d1a0cf73 SB |
110 | tpm_display_backend_drivers(); |
111 | return 1; | |
112 | } | |
113 | ||
114 | be = tpm_get_backend_driver(value); | |
115 | if (be == NULL) { | |
8b53a196 MA |
116 | error_report(QERR_INVALID_PARAMETER_VALUE, |
117 | "type", "a TPM backend type"); | |
d1a0cf73 SB |
118 | tpm_display_backend_drivers(); |
119 | return 1; | |
120 | } | |
121 | ||
bb716238 SB |
122 | /* validate backend specific opts */ |
123 | qemu_opts_validate(opts, be->opts, &local_err); | |
84d18f06 | 124 | if (local_err) { |
bc09a287 | 125 | error_report_err(local_err); |
bb716238 SB |
126 | return 1; |
127 | } | |
128 | ||
d1a0cf73 SB |
129 | drv = be->create(opts, id); |
130 | if (!drv) { | |
131 | return 1; | |
132 | } | |
133 | ||
8f0605cc SB |
134 | tpm_backend_open(drv, &local_err); |
135 | if (local_err) { | |
bc09a287 | 136 | error_report_err(local_err); |
8f0605cc SB |
137 | return 1; |
138 | } | |
139 | ||
d1a0cf73 SB |
140 | QLIST_INSERT_HEAD(&tpm_backends, drv, list); |
141 | ||
142 | return 0; | |
143 | } | |
144 | ||
28d0de7a | 145 | static int tpm_init_tpmdev(void *dummy, QemuOpts *opts, Error **errp) |
d1a0cf73 SB |
146 | { |
147 | return configure_tpm(opts); | |
148 | } | |
149 | ||
150 | /* | |
151 | * Walk the list of TPM backend drivers that are in use and call their | |
152 | * destroy function to have them cleaned up. | |
153 | */ | |
154 | void tpm_cleanup(void) | |
155 | { | |
156 | TPMBackend *drv, *next; | |
157 | ||
158 | QLIST_FOREACH_SAFE(drv, &tpm_backends, list, next) { | |
159 | QLIST_REMOVE(drv, list); | |
f35fe5cb | 160 | object_unref(OBJECT(drv)); |
d1a0cf73 SB |
161 | } |
162 | } | |
163 | ||
164 | /* | |
165 | * Initialize the TPM. Process the tpmdev command line options describing the | |
166 | * TPM backend. | |
167 | */ | |
168 | int tpm_init(void) | |
169 | { | |
28d0de7a MA |
170 | if (qemu_opts_foreach(qemu_find_opts("tpmdev"), |
171 | tpm_init_tpmdev, NULL, NULL)) { | |
d1a0cf73 SB |
172 | return -1; |
173 | } | |
174 | ||
d1a0cf73 SB |
175 | return 0; |
176 | } | |
177 | ||
178 | /* | |
179 | * Parse the TPM configuration options. | |
180 | * To display all available TPM backends the user may use '-tpmdev help' | |
181 | */ | |
182 | int tpm_config_parse(QemuOptsList *opts_list, const char *optarg) | |
183 | { | |
184 | QemuOpts *opts; | |
185 | ||
186 | if (!strcmp(optarg, "help")) { | |
187 | tpm_display_backend_drivers(); | |
188 | return -1; | |
189 | } | |
70b94331 | 190 | opts = qemu_opts_parse_noisily(opts_list, optarg, true); |
d1a0cf73 SB |
191 | if (!opts) { |
192 | return -1; | |
193 | } | |
194 | return 0; | |
195 | } | |
196 | ||
197 | #endif /* CONFIG_TPM */ | |
198 | ||
199 | static const TPMDriverOps *tpm_driver_find_by_type(enum TpmType type) | |
200 | { | |
a9a72aee | 201 | return be_drivers[type]; |
d1a0cf73 SB |
202 | } |
203 | ||
d1a0cf73 SB |
204 | /* |
205 | * Walk the list of active TPM backends and collect information about them | |
206 | * following the schema description in qapi-schema.json. | |
207 | */ | |
208 | TPMInfoList *qmp_query_tpm(Error **errp) | |
209 | { | |
210 | TPMBackend *drv; | |
211 | TPMInfoList *info, *head = NULL, *cur_item = NULL; | |
212 | ||
213 | QLIST_FOREACH(drv, &tpm_backends, list) { | |
00bbf50a | 214 | if (!tpm_models[drv->fe_model]) { |
d1a0cf73 SB |
215 | continue; |
216 | } | |
217 | info = g_new0(TPMInfoList, 1); | |
f59864ba | 218 | info->value = tpm_backend_query_tpm(drv); |
d1a0cf73 SB |
219 | |
220 | if (!cur_item) { | |
221 | head = cur_item = info; | |
222 | } else { | |
223 | cur_item->next = info; | |
224 | cur_item = info; | |
225 | } | |
226 | } | |
227 | ||
228 | return head; | |
229 | } | |
230 | ||
231 | TpmTypeList *qmp_query_tpm_types(Error **errp) | |
232 | { | |
233 | unsigned int i = 0; | |
234 | TpmTypeList *head = NULL, *prev = NULL, *cur_item; | |
235 | ||
7fb1cf16 | 236 | for (i = 0; i < TPM_TYPE__MAX; i++) { |
d1a0cf73 SB |
237 | if (!tpm_driver_find_by_type(i)) { |
238 | continue; | |
239 | } | |
240 | cur_item = g_new0(TpmTypeList, 1); | |
241 | cur_item->value = i; | |
242 | ||
243 | if (prev) { | |
244 | prev->next = cur_item; | |
245 | } | |
246 | if (!head) { | |
247 | head = cur_item; | |
248 | } | |
249 | prev = cur_item; | |
250 | } | |
251 | ||
252 | return head; | |
253 | } | |
254 | ||
255 | TpmModelList *qmp_query_tpm_models(Error **errp) | |
256 | { | |
257 | unsigned int i = 0; | |
258 | TpmModelList *head = NULL, *prev = NULL, *cur_item; | |
259 | ||
7fb1cf16 | 260 | for (i = 0; i < TPM_MODEL__MAX; i++) { |
00bbf50a | 261 | if (!tpm_models[i]) { |
d1a0cf73 SB |
262 | continue; |
263 | } | |
264 | cur_item = g_new0(TpmModelList, 1); | |
265 | cur_item->value = i; | |
266 | ||
267 | if (prev) { | |
268 | prev->next = cur_item; | |
269 | } | |
270 | if (!head) { | |
271 | head = cur_item; | |
272 | } | |
273 | prev = cur_item; | |
274 | } | |
275 | ||
276 | return head; | |
277 | } |