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)
53 for (i = 0; i < TPM_TYPE__MAX; i++) {
54 const TPMBackendClass *bc = tpm_be_find_by_type(i);
59 error_printf("Supported TPM types (choose only one):\n");
62 error_printf("%12s %s\n", TpmType_str(i), bc->desc);
65 error_printf("No TPM backend types are available\n");
70 * Find the TPM with the given Id
72 TPMBackend *qemu_find_tpm_be(const char *id)
77 QLIST_FOREACH(drv, &tpm_backends, list) {
78 if (!strcmp(drv->id, id)) {
87 static int tpm_init_tpmdev(void *dummy, QemuOpts *opts, Error **errp)
90 * Use of error_report() in a function with an Error ** parameter
91 * is suspicious. It is okay here. The parameter only exists to
92 * make the function usable with qemu_opts_foreach(). It is not
97 const TPMBackendClass *be;
99 Error *local_err = NULL;
102 if (!QLIST_EMPTY(&tpm_backends)) {
103 error_report("Only one TPM is allowed.");
107 id = qemu_opts_id(opts);
109 error_report(QERR_MISSING_PARAMETER, "id");
113 value = qemu_opt_get(opts, "type");
115 error_report(QERR_MISSING_PARAMETER, "type");
116 tpm_display_backend_drivers();
120 i = qapi_enum_parse(&TpmType_lookup, value, -1, NULL);
121 be = i >= 0 ? tpm_be_find_by_type(i) : NULL;
123 error_report(QERR_INVALID_PARAMETER_VALUE,
124 "type", "a TPM backend type");
125 tpm_display_backend_drivers();
129 /* validate backend specific opts */
130 if (!qemu_opts_validate(opts, be->opts, &local_err)) {
131 error_report_err(local_err);
135 drv = be->create(opts);
140 drv->id = g_strdup(id);
141 QLIST_INSERT_HEAD(&tpm_backends, drv, list);
147 * Walk the list of TPM backend drivers that are in use and call their
148 * destroy function to have them cleaned up.
150 void tpm_cleanup(void)
152 TPMBackend *drv, *next;
154 QLIST_FOREACH_SAFE(drv, &tpm_backends, list, next) {
155 QLIST_REMOVE(drv, list);
156 object_unref(OBJECT(drv));
161 * Initialize the TPM. Process the tpmdev command line options describing the
166 if (qemu_opts_foreach(qemu_find_opts("tpmdev"),
167 tpm_init_tpmdev, NULL, NULL)) {
175 * Parse the TPM configuration options.
176 * To display all available TPM backends the user may use '-tpmdev help'
178 int tpm_config_parse(QemuOptsList *opts_list, const char *optarg)
182 if (!strcmp(optarg, "help")) {
183 tpm_display_backend_drivers();
186 opts = qemu_opts_parse_noisily(opts_list, optarg, true);
194 * Walk the list of active TPM backends and collect information about them.
196 TPMInfoList *qmp_query_tpm(Error **errp)
199 TPMInfoList *head = NULL, **tail = &head;
201 QLIST_FOREACH(drv, &tpm_backends, list) {
206 QAPI_LIST_APPEND(tail, tpm_backend_query_tpm(drv));
212 TpmTypeList *qmp_query_tpm_types(Error **errp)
215 TpmTypeList *head = NULL, **tail = &head;
217 for (i = 0; i < TPM_TYPE__MAX; i++) {
218 if (!tpm_be_find_by_type(i)) {
221 QAPI_LIST_APPEND(tail, i);
226 TpmModelList *qmp_query_tpm_models(Error **errp)
228 TpmModelList *head = NULL, **tail = &head;
229 GSList *e, *l = object_class_get_list(TYPE_TPM_IF, false);
231 for (e = l; e; e = e->next) {
232 TPMIfClass *c = TPM_IF_CLASS(e->data);
234 QAPI_LIST_APPEND(tail, c->model);