buffer reallocation is very unlikely to be backend specific. Hence move inside the tis. Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
222 lines
5.1 KiB
C
222 lines
5.1 KiB
C
/*
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* QEMU TPM Backend
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*
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* Copyright IBM, Corp. 2013
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*
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* Authors:
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* Stefan Berger <stefanb@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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* Based on backends/rng.c by Anthony Liguori
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*/
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#include "qemu/osdep.h"
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#include "sysemu/tpm_backend.h"
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#include "qapi/error.h"
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#include "qapi/qmp/qerror.h"
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#include "sysemu/tpm.h"
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#include "qemu/thread.h"
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static void tpm_backend_worker_thread(gpointer data, gpointer user_data)
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{
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TPMBackend *s = TPM_BACKEND(user_data);
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TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
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assert(k->handle_request != NULL);
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k->handle_request(s, (TPMBackendCmd)data);
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}
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static void tpm_backend_thread_end(TPMBackend *s)
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{
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if (s->thread_pool) {
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g_thread_pool_push(s->thread_pool, (gpointer)TPM_BACKEND_CMD_END, NULL);
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g_thread_pool_free(s->thread_pool, FALSE, TRUE);
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s->thread_pool = NULL;
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}
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}
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enum TpmType tpm_backend_get_type(TPMBackend *s)
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{
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TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
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return k->ops->type;
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}
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int tpm_backend_init(TPMBackend *s, TPMState *state,
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TPMRecvDataCB *datacb)
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{
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TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
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s->tpm_state = state;
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s->recv_data_callback = datacb;
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s->had_startup_error = false;
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return k->ops->init ? k->ops->init(s) : 0;
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}
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int tpm_backend_startup_tpm(TPMBackend *s)
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{
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int res = 0;
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TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
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/* terminate a running TPM */
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tpm_backend_thread_end(s);
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s->thread_pool = g_thread_pool_new(tpm_backend_worker_thread, s, 1, TRUE,
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NULL);
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g_thread_pool_push(s->thread_pool, (gpointer)TPM_BACKEND_CMD_INIT, NULL);
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res = k->ops->startup_tpm ? k->ops->startup_tpm(s) : 0;
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s->had_startup_error = (res != 0);
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return res;
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}
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bool tpm_backend_had_startup_error(TPMBackend *s)
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{
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return s->had_startup_error;
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}
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void tpm_backend_deliver_request(TPMBackend *s)
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{
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g_thread_pool_push(s->thread_pool, (gpointer)TPM_BACKEND_CMD_PROCESS_CMD,
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NULL);
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}
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void tpm_backend_reset(TPMBackend *s)
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{
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TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
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if (k->ops->reset) {
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k->ops->reset(s);
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}
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tpm_backend_thread_end(s);
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s->had_startup_error = false;
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}
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void tpm_backend_cancel_cmd(TPMBackend *s)
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{
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TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
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assert(k->ops->cancel_cmd);
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k->ops->cancel_cmd(s);
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}
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bool tpm_backend_get_tpm_established_flag(TPMBackend *s)
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{
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TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
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return k->ops->get_tpm_established_flag ?
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k->ops->get_tpm_established_flag(s) : false;
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}
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int tpm_backend_reset_tpm_established_flag(TPMBackend *s, uint8_t locty)
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{
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TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
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return k->ops->reset_tpm_established_flag ?
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k->ops->reset_tpm_established_flag(s, locty) : 0;
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}
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TPMVersion tpm_backend_get_tpm_version(TPMBackend *s)
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{
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TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
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assert(k->ops->get_tpm_version);
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return k->ops->get_tpm_version(s);
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}
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TPMInfo *tpm_backend_query_tpm(TPMBackend *s)
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{
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TPMInfo *info = g_new0(TPMInfo, 1);
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TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
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info->id = g_strdup(s->id);
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info->model = s->fe_model;
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info->options = k->ops->get_tpm_options ?
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k->ops->get_tpm_options(s) : NULL;
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return info;
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}
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static bool tpm_backend_prop_get_opened(Object *obj, Error **errp)
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{
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TPMBackend *s = TPM_BACKEND(obj);
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return s->opened;
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}
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void tpm_backend_open(TPMBackend *s, Error **errp)
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{
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object_property_set_bool(OBJECT(s), true, "opened", errp);
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}
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static void tpm_backend_prop_set_opened(Object *obj, bool value, Error **errp)
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{
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TPMBackend *s = TPM_BACKEND(obj);
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TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
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Error *local_err = NULL;
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if (value == s->opened) {
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return;
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}
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if (!value && s->opened) {
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error_setg(errp, QERR_PERMISSION_DENIED);
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return;
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}
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if (k->opened) {
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k->opened(s, &local_err);
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if (local_err) {
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error_propagate(errp, local_err);
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return;
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}
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}
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s->opened = true;
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}
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static void tpm_backend_instance_init(Object *obj)
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{
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TPMBackend *s = TPM_BACKEND(obj);
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object_property_add_bool(obj, "opened",
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tpm_backend_prop_get_opened,
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tpm_backend_prop_set_opened,
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NULL);
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s->fe_model = -1;
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}
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static void tpm_backend_instance_finalize(Object *obj)
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{
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TPMBackend *s = TPM_BACKEND(obj);
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g_free(s->id);
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tpm_backend_thread_end(s);
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}
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static const TypeInfo tpm_backend_info = {
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.name = TYPE_TPM_BACKEND,
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.parent = TYPE_OBJECT,
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.instance_size = sizeof(TPMBackend),
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.instance_init = tpm_backend_instance_init,
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.instance_finalize = tpm_backend_instance_finalize,
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.class_size = sizeof(TPMBackendClass),
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.abstract = true,
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};
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static void register_types(void)
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{
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type_register_static(&tpm_backend_info);
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}
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type_init(register_types);
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