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 "qemu/osdep.h"
16 #include "qapi/qmp/qerror.h"
17 #include "sysemu/tpm_backend.h"
18 #include "sysemu/tpm.h"
19 #include "qemu/config-file.h"
20 #include "qemu/error-report.h"
21 #include "qmp-commands.h"
23 static QLIST_HEAD(, TPMBackend) tpm_backends =
24 QLIST_HEAD_INITIALIZER(tpm_backends);
26 static bool tpm_models[TPM_MODEL__MAX];
28 void tpm_register_model(enum TpmModel model)
30 tpm_models[model] = true;
35 static const TPMBackendClass *
36 tpm_be_find_by_type(enum TpmType type)
39 char *typename = g_strdup_printf("tpm-%s", TpmType_str(type));
41 oc = object_class_by_name(typename);
44 if (!object_class_dynamic_cast(oc, TYPE_TPM_BACKEND)) {
48 return TPM_BACKEND_CLASS(oc);
52 * Walk the list of available TPM backend drivers and display them on the
55 static void tpm_display_backend_drivers(void)
59 fprintf(stderr, "Supported TPM types (choose only one):\n");
61 for (i = 0; i < TPM_TYPE__MAX; i++) {
62 const TPMBackendClass *bc = tpm_be_find_by_type(i);
66 fprintf(stderr, "%12s %s\n", TpmType_str(i), bc->desc);
68 fprintf(stderr, "\n");
72 * Find the TPM with the given Id
74 TPMBackend *qemu_find_tpm(const char *id)
79 QLIST_FOREACH(drv, &tpm_backends, list) {
80 if (!strcmp(drv->id, id)) {
89 static int tpm_init_tpmdev(void *dummy, QemuOpts *opts, Error **errp)
93 const TPMBackendClass *be;
95 Error *local_err = NULL;
98 if (!QLIST_EMPTY(&tpm_backends)) {
99 error_report("Only one TPM is allowed.");
103 id = qemu_opts_id(opts);
105 error_report(QERR_MISSING_PARAMETER, "id");
109 value = qemu_opt_get(opts, "type");
111 error_report(QERR_MISSING_PARAMETER, "type");
112 tpm_display_backend_drivers();
116 i = qapi_enum_parse(&TpmType_lookup, value, -1, NULL);
117 be = i >= 0 ? tpm_be_find_by_type(i) : NULL;
119 error_report(QERR_INVALID_PARAMETER_VALUE,
120 "type", "a TPM backend type");
121 tpm_display_backend_drivers();
125 /* validate backend specific opts */
126 qemu_opts_validate(opts, be->opts, &local_err);
128 error_report_err(local_err);
132 drv = be->create(opts, id);
137 tpm_backend_open(drv, &local_err);
139 error_report_err(local_err);
143 QLIST_INSERT_HEAD(&tpm_backends, drv, list);
149 * Walk the list of TPM backend drivers that are in use and call their
150 * destroy function to have them cleaned up.
152 void tpm_cleanup(void)
154 TPMBackend *drv, *next;
156 QLIST_FOREACH_SAFE(drv, &tpm_backends, list, next) {
157 QLIST_REMOVE(drv, list);
158 object_unref(OBJECT(drv));
163 * Initialize the TPM. Process the tpmdev command line options describing the
168 if (qemu_opts_foreach(qemu_find_opts("tpmdev"),
169 tpm_init_tpmdev, NULL, NULL)) {
177 * Parse the TPM configuration options.
178 * To display all available TPM backends the user may use '-tpmdev help'
180 int tpm_config_parse(QemuOptsList *opts_list, const char *optarg)
184 if (!strcmp(optarg, "help")) {
185 tpm_display_backend_drivers();
188 opts = qemu_opts_parse_noisily(opts_list, optarg, true);
195 #endif /* CONFIG_TPM */
198 * Walk the list of active TPM backends and collect information about them
199 * following the schema description in qapi-schema.json.
201 TPMInfoList *qmp_query_tpm(Error **errp)
204 TPMInfoList *info, *head = NULL, *cur_item = NULL;
206 QLIST_FOREACH(drv, &tpm_backends, list) {
207 if (!tpm_models[drv->fe_model]) {
210 info = g_new0(TPMInfoList, 1);
211 info->value = tpm_backend_query_tpm(drv);
214 head = cur_item = info;
216 cur_item->next = info;
224 TpmTypeList *qmp_query_tpm_types(Error **errp)
227 TpmTypeList *head = NULL, *prev = NULL, *cur_item;
229 for (i = 0; i < TPM_TYPE__MAX; i++) {
230 if (!tpm_be_find_by_type(i)) {
233 cur_item = g_new0(TpmTypeList, 1);
237 prev->next = cur_item;
248 TpmModelList *qmp_query_tpm_models(Error **errp)
251 TpmModelList *head = NULL, *prev = NULL, *cur_item;
253 for (i = 0; i < TPM_MODEL__MAX; i++) {
254 if (!tpm_models[i]) {
257 cur_item = g_new0(TpmModelList, 1);
261 prev->next = cur_item;