root / tpm.c @ f487b677
History | View | Annotate | Download (7.6 kB)
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 |
-1,
|
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] == -1) { |
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 (error_is_set(&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 |
} |