1 files changed, 196 insertions, 0 deletions
diff --git a/qemu/backends/tpm.c b/qemu/backends/tpm.c
new file mode 100644
index 000000000..a512693b1
--- /dev/null
+++ b/qemu/backends/tpm.c
@@ -0,0 +1,196 @@
+/*
+ * 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 "sysemu/tpm_backend.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);