| /* |
| * 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" |
| |
| static void tpm_backend_worker_thread(gpointer data, gpointer user_data) |
| { |
| TPMBackend *s = TPM_BACKEND(user_data); |
| TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); |
| |
| assert(k->handle_request != NULL); |
| k->handle_request(s, (TPMBackendCmd)data); |
| } |
| |
| static void tpm_backend_thread_end(TPMBackend *s) |
| { |
| if (s->thread_pool) { |
| g_thread_pool_push(s->thread_pool, (gpointer)TPM_BACKEND_CMD_END, NULL); |
| g_thread_pool_free(s->thread_pool, FALSE, TRUE); |
| s->thread_pool = NULL; |
| } |
| } |
| |
| enum TpmType tpm_backend_get_type(TPMBackend *s) |
| { |
| TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); |
| |
| return k->ops->type; |
| } |
| |
| int tpm_backend_init(TPMBackend *s, TPMState *state, |
| TPMRecvDataCB *datacb) |
| { |
| TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); |
| |
| s->tpm_state = state; |
| s->recv_data_callback = datacb; |
| s->had_startup_error = false; |
| |
| return k->ops->init ? k->ops->init(s) : 0; |
| } |
| |
| int tpm_backend_startup_tpm(TPMBackend *s) |
| { |
| int res = 0; |
| TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); |
| |
| /* terminate a running TPM */ |
| tpm_backend_thread_end(s); |
| |
| s->thread_pool = g_thread_pool_new(tpm_backend_worker_thread, s, 1, TRUE, |
| NULL); |
| g_thread_pool_push(s->thread_pool, (gpointer)TPM_BACKEND_CMD_INIT, NULL); |
| |
| res = k->ops->startup_tpm ? k->ops->startup_tpm(s) : 0; |
| |
| s->had_startup_error = (res != 0); |
| |
| return res; |
| } |
| |
| bool tpm_backend_had_startup_error(TPMBackend *s) |
| { |
| return s->had_startup_error; |
| } |
| |
| size_t tpm_backend_realloc_buffer(TPMBackend *s, TPMSizedBuffer *sb) |
| { |
| TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); |
| |
| assert(k->ops->realloc_buffer); |
| |
| return k->ops->realloc_buffer(sb); |
| } |
| |
| void tpm_backend_deliver_request(TPMBackend *s) |
| { |
| g_thread_pool_push(s->thread_pool, (gpointer)TPM_BACKEND_CMD_PROCESS_CMD, |
| NULL); |
| } |
| |
| void tpm_backend_reset(TPMBackend *s) |
| { |
| TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); |
| |
| if (k->ops->reset) { |
| k->ops->reset(s); |
| } |
| |
| tpm_backend_thread_end(s); |
| |
| s->had_startup_error = false; |
| } |
| |
| void tpm_backend_cancel_cmd(TPMBackend *s) |
| { |
| TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); |
| |
| assert(k->ops->cancel_cmd); |
| |
| 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 ? |
| k->ops->get_tpm_established_flag(s) : false; |
| } |
| |
| 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 ? |
| k->ops->reset_tpm_established_flag(s, locty) : 0; |
| } |
| |
| TPMVersion tpm_backend_get_tpm_version(TPMBackend *s) |
| { |
| TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); |
| |
| assert(k->ops->get_tpm_version); |
| |
| return k->ops->get_tpm_version(s); |
| } |
| |
| TPMInfo *tpm_backend_query_tpm(TPMBackend *s) |
| { |
| TPMInfo *info = g_new0(TPMInfo, 1); |
| TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s); |
| |
| info->id = g_strdup(s->id); |
| info->model = s->fe_model; |
| info->options = k->ops->get_tpm_options ? |
| k->ops->get_tpm_options(s) : NULL; |
| |
| return info; |
| } |
| |
| 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) |
| { |
| TPMBackend *s = TPM_BACKEND(obj); |
| |
| object_property_add_bool(obj, "opened", |
| tpm_backend_prop_get_opened, |
| tpm_backend_prop_set_opened, |
| NULL); |
| s->fe_model = -1; |
| } |
| |
| static void tpm_backend_instance_finalize(Object *obj) |
| { |
| TPMBackend *s = TPM_BACKEND(obj); |
| |
| g_free(s->id); |
| tpm_backend_thread_end(s); |
| } |
| |
| static const TypeInfo tpm_backend_info = { |
| .name = TYPE_TPM_BACKEND, |
| .parent = TYPE_OBJECT, |
| .instance_size = sizeof(TPMBackend), |
| .instance_init = tpm_backend_instance_init, |
| .instance_finalize = tpm_backend_instance_finalize, |
| .class_size = sizeof(TPMBackendClass), |
| .abstract = true, |
| }; |
| |
| static void register_types(void) |
| { |
| type_register_static(&tpm_backend_info); |
| } |
| |
| type_init(register_types); |