4 * Copyright (C) 2011-2013 IBM Corporation
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.
15 #include "qemu/osdep.h"
17 #include "qapi/error.h"
18 #include "qapi/qapi-commands-tpm.h"
19 #include "qapi/qmp/qerror.h"
20 #include "sysemu/tpm_backend.h"
21 #include "sysemu/tpm.h"
22 #include "qemu/config-file.h"
23 #include "qemu/error-report.h"
25 static QLIST_HEAD(, TPMBackend) tpm_backends =
26 QLIST_HEAD_INITIALIZER(tpm_backends);
28 static const TPMBackendClass *
29 tpm_be_find_by_type(enum TpmType type)
32 char *typename = g_strdup_printf("tpm-%s", TpmType_str(type));
34 oc = object_class_by_name(typename);
37 if (!object_class_dynamic_cast(oc, TYPE_TPM_BACKEND)) {
41 return TPM_BACKEND_CLASS(oc);
45 * Walk the list of available TPM backend drivers and display them on the
48 static void tpm_display_backend_drivers(void)
52 fprintf(stderr, "Supported TPM types (choose only one):\n");
54 for (i = 0; i < TPM_TYPE__MAX; i++) {
55 const TPMBackendClass *bc = tpm_be_find_by_type(i);
59 fprintf(stderr, "%12s %s\n", TpmType_str(i), bc->desc);
61 fprintf(stderr, "\n");
65 * Find the TPM with the given Id
67 TPMBackend *qemu_find_tpm_be(const char *id)
72 QLIST_FOREACH(drv, &tpm_backends, list) {
73 if (!strcmp(drv->id, id)) {
82 static int tpm_init_tpmdev(void *dummy, QemuOpts *opts, Error **errp)
86 const TPMBackendClass *be;
88 Error *local_err = NULL;
91 if (!QLIST_EMPTY(&tpm_backends)) {
92 error_report("Only one TPM is allowed.");
96 id = qemu_opts_id(opts);
98 error_report(QERR_MISSING_PARAMETER, "id");
102 value = qemu_opt_get(opts, "type");
104 error_report(QERR_MISSING_PARAMETER, "type");
105 tpm_display_backend_drivers();
109 i = qapi_enum_parse(&TpmType_lookup, value, -1, NULL);
110 be = i >= 0 ? tpm_be_find_by_type(i) : NULL;
112 error_report(QERR_INVALID_PARAMETER_VALUE,
113 "type", "a TPM backend type");
114 tpm_display_backend_drivers();
118 /* validate backend specific opts */
119 qemu_opts_validate(opts, be->opts, &local_err);
121 error_report_err(local_err);
125 drv = be->create(opts);
130 drv->id = g_strdup(id);
131 QLIST_INSERT_HEAD(&tpm_backends, drv, list);
137 * Walk the list of TPM backend drivers that are in use and call their
138 * destroy function to have them cleaned up.
140 void tpm_cleanup(void)
142 TPMBackend *drv, *next;
144 QLIST_FOREACH_SAFE(drv, &tpm_backends, list, next) {
145 QLIST_REMOVE(drv, list);
146 object_unref(OBJECT(drv));
151 * Initialize the TPM. Process the tpmdev command line options describing the
156 if (qemu_opts_foreach(qemu_find_opts("tpmdev"),
157 tpm_init_tpmdev, NULL, NULL)) {
165 * Parse the TPM configuration options.
166 * To display all available TPM backends the user may use '-tpmdev help'
168 int tpm_config_parse(QemuOptsList *opts_list, const char *optarg)
172 if (!strcmp(optarg, "help")) {
173 tpm_display_backend_drivers();
176 opts = qemu_opts_parse_noisily(opts_list, optarg, true);
184 * Walk the list of active TPM backends and collect information about them.
186 TPMInfoList *qmp_query_tpm(Error **errp)
189 TPMInfoList *info, *head = NULL, *cur_item = NULL;
191 QLIST_FOREACH(drv, &tpm_backends, list) {
196 info = g_new0(TPMInfoList, 1);
197 info->value = tpm_backend_query_tpm(drv);
200 head = cur_item = info;
202 cur_item->next = info;
210 TpmTypeList *qmp_query_tpm_types(Error **errp)
213 TpmTypeList *head = NULL, *prev = NULL, *cur_item;
215 for (i = 0; i < TPM_TYPE__MAX; i++) {
216 if (!tpm_be_find_by_type(i)) {
219 cur_item = g_new0(TpmTypeList, 1);
223 prev->next = cur_item;
233 TpmModelList *qmp_query_tpm_models(Error **errp)
235 TpmModelList *head = NULL, *prev = NULL, *cur_item;
236 GSList *e, *l = object_class_get_list(TYPE_TPM_IF, false);
238 for (e = l; e; e = e->next) {
239 TPMIfClass *c = TPM_IF_CLASS(e->data);
241 cur_item = g_new0(TpmModelList, 1);
242 cur_item->value = c->model;
245 prev->next = cur_item;