| /* |
| * 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); |