qemu-char: fix MISSING_COMMA
[qemu.git] / tpm.c
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 */
14 #include "config-host.h"
15
16 #include "monitor/monitor.h"
17 #include "qapi/qmp/qerror.h"
18 #include "sysemu/tpm_backend.h"
19 #include "sysemu/tpm.h"
20 #include "qemu/config-file.h"
21 #include "qmp-commands.h"
22
23 static QLIST_HEAD(, TPMBackend) tpm_backends =
24 QLIST_HEAD_INITIALIZER(tpm_backends);
25
26
27 #define TPM_MAX_MODELS 1
28 #define TPM_MAX_DRIVERS 1
29
30 static TPMDriverOps const *be_drivers[TPM_MAX_DRIVERS] = {
31 NULL,
32 };
33
34 static enum TpmModel tpm_models[TPM_MAX_MODELS] = {
35 TPM_MODEL_MAX,
36 };
37
38 int tpm_register_model(enum TpmModel model)
39 {
40 int i;
41
42 for (i = 0; i < TPM_MAX_MODELS; i++) {
43 if (tpm_models[i] == TPM_MODEL_MAX) {
44 tpm_models[i] = model;
45 return 0;
46 }
47 }
48 error_report("Could not register TPM model");
49 return 1;
50 }
51
52 static bool tpm_model_is_registered(enum TpmModel model)
53 {
54 int i;
55
56 for (i = 0; i < TPM_MAX_MODELS; i++) {
57 if (tpm_models[i] == model) {
58 return true;
59 }
60 }
61 return false;
62 }
63
64 const TPMDriverOps *tpm_get_backend_driver(const char *type)
65 {
66 int i;
67
68 for (i = 0; i < TPM_MAX_DRIVERS && be_drivers[i] != NULL; i++) {
69 if (!strcmp(TpmType_lookup[be_drivers[i]->type], type)) {
70 return be_drivers[i];
71 }
72 }
73
74 return NULL;
75 }
76
77 #ifdef CONFIG_TPM
78
79 int tpm_register_driver(const TPMDriverOps *tdo)
80 {
81 int i;
82
83 for (i = 0; i < TPM_MAX_DRIVERS; i++) {
84 if (!be_drivers[i]) {
85 be_drivers[i] = tdo;
86 return 0;
87 }
88 }
89 error_report("Could not register TPM driver");
90 return 1;
91 }
92
93 /*
94 * Walk the list of available TPM backend drivers and display them on the
95 * screen.
96 */
97 static void tpm_display_backend_drivers(void)
98 {
99 int i;
100
101 fprintf(stderr, "Supported TPM types (choose only one):\n");
102
103 for (i = 0; i < TPM_MAX_DRIVERS && be_drivers[i] != NULL; i++) {
104 fprintf(stderr, "%12s %s\n",
105 TpmType_lookup[be_drivers[i]->type], be_drivers[i]->desc());
106 }
107 fprintf(stderr, "\n");
108 }
109
110 /*
111 * Find the TPM with the given Id
112 */
113 TPMBackend *qemu_find_tpm(const char *id)
114 {
115 TPMBackend *drv;
116
117 if (id) {
118 QLIST_FOREACH(drv, &tpm_backends, list) {
119 if (!strcmp(drv->id, id)) {
120 return drv;
121 }
122 }
123 }
124
125 return NULL;
126 }
127
128 static int configure_tpm(QemuOpts *opts)
129 {
130 const char *value;
131 const char *id;
132 const TPMDriverOps *be;
133 TPMBackend *drv;
134 Error *local_err = NULL;
135
136 if (!QLIST_EMPTY(&tpm_backends)) {
137 error_report("Only one TPM is allowed.\n");
138 return 1;
139 }
140
141 id = qemu_opts_id(opts);
142 if (id == NULL) {
143 qerror_report(QERR_MISSING_PARAMETER, "id");
144 return 1;
145 }
146
147 value = qemu_opt_get(opts, "type");
148 if (!value) {
149 qerror_report(QERR_MISSING_PARAMETER, "type");
150 tpm_display_backend_drivers();
151 return 1;
152 }
153
154 be = tpm_get_backend_driver(value);
155 if (be == NULL) {
156 qerror_report(QERR_INVALID_PARAMETER_VALUE, "type",
157 "a TPM backend type");
158 tpm_display_backend_drivers();
159 return 1;
160 }
161
162 /* validate backend specific opts */
163 qemu_opts_validate(opts, be->opts, &local_err);
164 if (local_err) {
165 qerror_report_err(local_err);
166 error_free(local_err);
167 return 1;
168 }
169
170 drv = be->create(opts, id);
171 if (!drv) {
172 return 1;
173 }
174
175 tpm_backend_open(drv, &local_err);
176 if (local_err) {
177 qerror_report_err(local_err);
178 error_free(local_err);
179 return 1;
180 }
181
182 QLIST_INSERT_HEAD(&tpm_backends, drv, list);
183
184 return 0;
185 }
186
187 static int tpm_init_tpmdev(QemuOpts *opts, void *dummy)
188 {
189 return configure_tpm(opts);
190 }
191
192 /*
193 * Walk the list of TPM backend drivers that are in use and call their
194 * destroy function to have them cleaned up.
195 */
196 void tpm_cleanup(void)
197 {
198 TPMBackend *drv, *next;
199
200 QLIST_FOREACH_SAFE(drv, &tpm_backends, list, next) {
201 QLIST_REMOVE(drv, list);
202 tpm_backend_destroy(drv);
203 }
204 }
205
206 /*
207 * Initialize the TPM. Process the tpmdev command line options describing the
208 * TPM backend.
209 */
210 int tpm_init(void)
211 {
212 if (qemu_opts_foreach(qemu_find_opts("tpmdev"),
213 tpm_init_tpmdev, NULL, 1) != 0) {
214 return -1;
215 }
216
217 atexit(tpm_cleanup);
218
219 return 0;
220 }
221
222 /*
223 * Parse the TPM configuration options.
224 * To display all available TPM backends the user may use '-tpmdev help'
225 */
226 int tpm_config_parse(QemuOptsList *opts_list, const char *optarg)
227 {
228 QemuOpts *opts;
229
230 if (!strcmp(optarg, "help")) {
231 tpm_display_backend_drivers();
232 return -1;
233 }
234 opts = qemu_opts_parse(opts_list, optarg, 1);
235 if (!opts) {
236 return -1;
237 }
238 return 0;
239 }
240
241 #endif /* CONFIG_TPM */
242
243 static const TPMDriverOps *tpm_driver_find_by_type(enum TpmType type)
244 {
245 int i;
246
247 for (i = 0; i < TPM_MAX_DRIVERS && be_drivers[i] != NULL; i++) {
248 if (be_drivers[i]->type == type) {
249 return be_drivers[i];
250 }
251 }
252 return NULL;
253 }
254
255 static TPMInfo *qmp_query_tpm_inst(TPMBackend *drv)
256 {
257 TPMInfo *res = g_new0(TPMInfo, 1);
258 TPMPassthroughOptions *tpo;
259
260 res->id = g_strdup(drv->id);
261 res->model = drv->fe_model;
262 res->options = g_new0(TpmTypeOptions, 1);
263
264 switch (drv->ops->type) {
265 case TPM_TYPE_PASSTHROUGH:
266 res->options->kind = TPM_TYPE_OPTIONS_KIND_PASSTHROUGH;
267 tpo = g_new0(TPMPassthroughOptions, 1);
268 res->options->passthrough = tpo;
269 if (drv->path) {
270 tpo->path = g_strdup(drv->path);
271 tpo->has_path = true;
272 }
273 if (drv->cancel_path) {
274 tpo->cancel_path = g_strdup(drv->cancel_path);
275 tpo->has_cancel_path = true;
276 }
277 break;
278 case TPM_TYPE_MAX:
279 break;
280 }
281
282 return res;
283 }
284
285 /*
286 * Walk the list of active TPM backends and collect information about them
287 * following the schema description in qapi-schema.json.
288 */
289 TPMInfoList *qmp_query_tpm(Error **errp)
290 {
291 TPMBackend *drv;
292 TPMInfoList *info, *head = NULL, *cur_item = NULL;
293
294 QLIST_FOREACH(drv, &tpm_backends, list) {
295 if (!tpm_model_is_registered(drv->fe_model)) {
296 continue;
297 }
298 info = g_new0(TPMInfoList, 1);
299 info->value = qmp_query_tpm_inst(drv);
300
301 if (!cur_item) {
302 head = cur_item = info;
303 } else {
304 cur_item->next = info;
305 cur_item = info;
306 }
307 }
308
309 return head;
310 }
311
312 TpmTypeList *qmp_query_tpm_types(Error **errp)
313 {
314 unsigned int i = 0;
315 TpmTypeList *head = NULL, *prev = NULL, *cur_item;
316
317 for (i = 0; i < TPM_TYPE_MAX; i++) {
318 if (!tpm_driver_find_by_type(i)) {
319 continue;
320 }
321 cur_item = g_new0(TpmTypeList, 1);
322 cur_item->value = i;
323
324 if (prev) {
325 prev->next = cur_item;
326 }
327 if (!head) {
328 head = cur_item;
329 }
330 prev = cur_item;
331 }
332
333 return head;
334 }
335
336 TpmModelList *qmp_query_tpm_models(Error **errp)
337 {
338 unsigned int i = 0;
339 TpmModelList *head = NULL, *prev = NULL, *cur_item;
340
341 for (i = 0; i < TPM_MODEL_MAX; i++) {
342 if (!tpm_model_is_registered(i)) {
343 continue;
344 }
345 cur_item = g_new0(TpmModelList, 1);
346 cur_item->value = i;
347
348 if (prev) {
349 prev->next = cur_item;
350 }
351 if (!head) {
352 head = cur_item;
353 }
354 prev = cur_item;
355 }
356
357 return head;
358 }