/* * QEMU TPM Backend * * Copyright IBM, Corp. 2013 * * Authors: * Stefan Berger <stefanb@us.ibm.com> * * This work is licensed under the terms of the GNU GPL, version 2 or later. * See the COPYING file in the top-level directory. * * Based on backends/rng.c by Anthony Liguori */ #include "qemu/osdep.h" #include "sysemu/tpm_backend.h" #include "qapi/error.h" #include "qapi/qmp/qerror.h" #include "sysemu/tpm.h" #include "qemu/thread.h" #include "sysemu/tpm_backend_int.h" enum TpmType tpm_backend_get_type(TPMBackend *s) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); return k->ops->type; } const char *tpm_backend_get_desc(TPMBackend *s) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); return k->ops->desc(); } void tpm_backend_destroy(TPMBackend *s) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); k->ops->destroy(s); } int tpm_backend_init(TPMBackend *s, TPMState *state, TPMRecvDataCB *datacb) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); return k->ops->init(s, state, datacb); } int tpm_backend_startup_tpm(TPMBackend *s) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); return k->ops->startup_tpm(s); } bool tpm_backend_had_startup_error(TPMBackend *s) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); return k->ops->had_startup_error(s); } size_t tpm_backend_realloc_buffer(TPMBackend *s, TPMSizedBuffer *sb) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); return k->ops->realloc_buffer(sb); } void tpm_backend_deliver_request(TPMBackend *s) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); k->ops->deliver_request(s); } void tpm_backend_reset(TPMBackend *s) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); k->ops->reset(s); } void tpm_backend_cancel_cmd(TPMBackend *s) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); k->ops->cancel_cmd(s); } bool tpm_backend_get_tpm_established_flag(TPMBackend *s) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); return k->ops->get_tpm_established_flag(s); } int tpm_backend_reset_tpm_established_flag(TPMBackend *s, uint8_t locty) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); return k->ops->reset_tpm_established_flag(s, locty); } TPMVersion tpm_backend_get_tpm_version(TPMBackend *s) { TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); return k->ops->get_tpm_version(s); } static bool tpm_backend_prop_get_opened(Object *obj, Error **errp) { TPMBackend *s = TPM_BACKEND(obj); return s->opened; } void tpm_backend_open(TPMBackend *s, Error **errp) { object_property_set_bool(OBJECT(s), true, "opened", errp); } static void tpm_backend_prop_set_opened(Object *obj, bool value, Error **errp) { TPMBackend *s = TPM_BACKEND(obj); TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); Error *local_err = NULL; if (value == s->opened) { return; } if (!value && s->opened) { error_setg(errp, QERR_PERMISSION_DENIED); return; } if (k->opened) { k->opened(s, &local_err); if (local_err) { error_propagate(errp, local_err); return; } } s->opened = true; } static void tpm_backend_instance_init(Object *obj) { object_property_add_bool(obj, "opened", tpm_backend_prop_get_opened, tpm_backend_prop_set_opened, NULL); } void tpm_backend_thread_deliver_request(TPMBackendThread *tbt) { g_thread_pool_push(tbt->pool, (gpointer)TPM_BACKEND_CMD_PROCESS_CMD, NULL); } void tpm_backend_thread_create(TPMBackendThread *tbt, GFunc func, gpointer user_data) { if (!tbt->pool) { tbt->pool = g_thread_pool_new(func, user_data, 1, TRUE, NULL); g_thread_pool_push(tbt->pool, (gpointer)TPM_BACKEND_CMD_INIT, NULL); } } void tpm_backend_thread_end(TPMBackendThread *tbt) { if (tbt->pool) { g_thread_pool_push(tbt->pool, (gpointer)TPM_BACKEND_CMD_END, NULL); g_thread_pool_free(tbt->pool, FALSE, TRUE); tbt->pool = NULL; } } static const TypeInfo tpm_backend_info = { .name = TYPE_TPM_BACKEND, .parent = TYPE_OBJECT, .instance_size = sizeof(TPMBackend), .instance_init = tpm_backend_instance_init, .class_size = sizeof(TPMBackendClass), .abstract = true, }; static void register_types(void) { type_register_static(&tpm_backend_info); } type_init(register_types);