4 * Copyright (C) 2011-2013 IBM Corporation
7 * Stefan Berger <stefanb@us.ibm.com>
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.
14 #include "config-host.h"
16 #include "monitor/monitor.h"
17 #include "qapi/qmp/qerror.h"
18 #include "backends/tpm.h"
19 #include "sysemu/tpm.h"
20 #include "qemu/config-file.h"
21 #include "qmp-commands.h"
23 static QLIST_HEAD(, TPMBackend) tpm_backends =
24 QLIST_HEAD_INITIALIZER(tpm_backends);
27 #define TPM_MAX_MODELS 1
28 #define TPM_MAX_DRIVERS 1
30 static TPMDriverOps const *be_drivers[TPM_MAX_DRIVERS] = {
34 static enum TpmModel tpm_models[TPM_MAX_MODELS] = {
38 int tpm_register_model(enum TpmModel model)
42 for (i = 0; i < TPM_MAX_MODELS; i++) {
43 if (tpm_models[i] == -1) {
44 tpm_models[i] = model;
48 error_report("Could not register TPM model");
52 static bool tpm_model_is_registered(enum TpmModel model)
56 for (i = 0; i < TPM_MAX_MODELS; i++) {
57 if (tpm_models[i] == model) {
64 const TPMDriverOps *tpm_get_backend_driver(const char *type)
68 for (i = 0; i < TPM_MAX_DRIVERS && be_drivers[i] != NULL; i++) {
69 if (!strcmp(TpmType_lookup[be_drivers[i]->type], type)) {
79 int tpm_register_driver(const TPMDriverOps *tdo)
83 for (i = 0; i < TPM_MAX_DRIVERS; i++) {
89 error_report("Could not register TPM driver");
94 * Walk the list of available TPM backend drivers and display them on the
97 static void tpm_display_backend_drivers(void)
101 fprintf(stderr, "Supported TPM types (choose only one):\n");
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());
107 fprintf(stderr, "\n");
111 * Find the TPM with the given Id
113 TPMBackend *qemu_find_tpm(const char *id)
118 QLIST_FOREACH(drv, &tpm_backends, list) {
119 if (!strcmp(drv->id, id)) {
128 static int configure_tpm(QemuOpts *opts)
132 const TPMDriverOps *be;
134 Error *local_err = NULL;
136 if (!QLIST_EMPTY(&tpm_backends)) {
137 error_report("Only one TPM is allowed.\n");
141 id = qemu_opts_id(opts);
143 qerror_report(QERR_MISSING_PARAMETER, "id");
147 value = qemu_opt_get(opts, "type");
149 qerror_report(QERR_MISSING_PARAMETER, "type");
150 tpm_display_backend_drivers();
154 be = tpm_get_backend_driver(value);
156 qerror_report(QERR_INVALID_PARAMETER_VALUE, "type",
157 "a TPM backend type");
158 tpm_display_backend_drivers();
162 drv = be->create(opts, id);
167 tpm_backend_open(drv, &local_err);
169 qerror_report_err(local_err);
170 error_free(local_err);
174 QLIST_INSERT_HEAD(&tpm_backends, drv, list);
179 static int tpm_init_tpmdev(QemuOpts *opts, void *dummy)
181 return configure_tpm(opts);
185 * Walk the list of TPM backend drivers that are in use and call their
186 * destroy function to have them cleaned up.
188 void tpm_cleanup(void)
190 TPMBackend *drv, *next;
192 QLIST_FOREACH_SAFE(drv, &tpm_backends, list, next) {
193 QLIST_REMOVE(drv, list);
194 tpm_backend_destroy(drv);
199 * Initialize the TPM. Process the tpmdev command line options describing the
204 if (qemu_opts_foreach(qemu_find_opts("tpmdev"),
205 tpm_init_tpmdev, NULL, 1) != 0) {
215 * Parse the TPM configuration options.
216 * To display all available TPM backends the user may use '-tpmdev help'
218 int tpm_config_parse(QemuOptsList *opts_list, const char *optarg)
222 if (!strcmp(optarg, "help")) {
223 tpm_display_backend_drivers();
226 opts = qemu_opts_parse(opts_list, optarg, 1);
233 #endif /* CONFIG_TPM */
235 static const TPMDriverOps *tpm_driver_find_by_type(enum TpmType type)
239 for (i = 0; i < TPM_MAX_DRIVERS && be_drivers[i] != NULL; i++) {
240 if (be_drivers[i]->type == type) {
241 return be_drivers[i];
247 static TPMInfo *qmp_query_tpm_inst(TPMBackend *drv)
249 TPMInfo *res = g_new0(TPMInfo, 1);
250 TPMPassthroughOptions *tpo;
252 res->id = g_strdup(drv->id);
253 res->model = drv->fe_model;
254 res->options = g_new0(TpmTypeOptions, 1);
256 switch (drv->ops->type) {
257 case TPM_TYPE_PASSTHROUGH:
258 res->options->kind = TPM_TYPE_OPTIONS_KIND_PASSTHROUGH;
259 tpo = g_new0(TPMPassthroughOptions, 1);
260 res->options->passthrough = tpo;
262 tpo->path = g_strdup(drv->path);
263 tpo->has_path = true;
265 if (drv->cancel_path) {
266 tpo->cancel_path = g_strdup(drv->cancel_path);
267 tpo->has_cancel_path = true;
278 * Walk the list of active TPM backends and collect information about them
279 * following the schema description in qapi-schema.json.
281 TPMInfoList *qmp_query_tpm(Error **errp)
284 TPMInfoList *info, *head = NULL, *cur_item = NULL;
286 QLIST_FOREACH(drv, &tpm_backends, list) {
287 if (!tpm_model_is_registered(drv->fe_model)) {
290 info = g_new0(TPMInfoList, 1);
291 info->value = qmp_query_tpm_inst(drv);
294 head = cur_item = info;
296 cur_item->next = info;
304 TpmTypeList *qmp_query_tpm_types(Error **errp)
307 TpmTypeList *head = NULL, *prev = NULL, *cur_item;
309 for (i = 0; i < TPM_TYPE_MAX; i++) {
310 if (!tpm_driver_find_by_type(i)) {
313 cur_item = g_new0(TpmTypeList, 1);
317 prev->next = cur_item;
328 TpmModelList *qmp_query_tpm_models(Error **errp)
331 TpmModelList *head = NULL, *prev = NULL, *cur_item;
333 for (i = 0; i < TPM_MODEL_MAX; i++) {
334 if (!tpm_model_is_registered(i)) {
337 cur_item = g_new0(TpmModelList, 1);
341 prev->next = cur_item;