* Based on backends/rng.c by Anthony Liguori
*/
+#include "qemu/osdep.h"
#include "sysemu/tpm_backend.h"
-#include "qapi/qmp/qerror.h"
+#include "qapi/error.h"
#include "sysemu/tpm.h"
#include "qemu/thread.h"
-#include "sysemu/tpm_backend_int.h"
+#include "qemu/main-loop.h"
+#include "qemu/module.h"
+#include "block/thread-pool.h"
+#include "qemu/error-report.h"
-enum TpmType tpm_backend_get_type(TPMBackend *s)
+static void tpm_backend_request_completed(void *opaque, int ret)
{
- TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
+ TPMBackend *s = TPM_BACKEND(opaque);
+ TPMIfClass *tic = TPM_IF_GET_CLASS(s->tpmif);
- return k->ops->type;
+ tic->request_completed(s->tpmif, ret);
+
+ /* no need for atomic, as long the BQL is taken */
+ s->cmd = NULL;
+ object_unref(OBJECT(s));
}
-const char *tpm_backend_get_desc(TPMBackend *s)
+static int tpm_backend_worker_thread(gpointer data)
{
+ TPMBackend *s = TPM_BACKEND(data);
TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
+ Error *err = NULL;
- return k->ops->desc();
+ k->handle_request(s, s->cmd, &err);
+ if (err) {
+ error_report_err(err);
+ return -1;
+ }
+
+ return 0;
}
-void tpm_backend_destroy(TPMBackend *s)
+void tpm_backend_finish_sync(TPMBackend *s)
{
- TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
-
- k->ops->destroy(s);
+ while (s->cmd) {
+ aio_poll(qemu_get_aio_context(), true);
+ }
}
-int tpm_backend_init(TPMBackend *s, TPMState *state,
- TPMRecvDataCB *datacb)
+enum TpmType tpm_backend_get_type(TPMBackend *s)
{
TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
- return k->ops->init(s, state, datacb);
+ return k->type;
}
-int tpm_backend_startup_tpm(TPMBackend *s)
+int tpm_backend_init(TPMBackend *s, TPMIf *tpmif, Error **errp)
{
- TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
+ if (s->tpmif) {
+ error_setg(errp, "TPM backend '%s' is already initialized", s->id);
+ return -1;
+ }
- return k->ops->startup_tpm(s);
+ s->tpmif = tpmif;
+ object_ref(OBJECT(tpmif));
+
+ s->had_startup_error = false;
+
+ return 0;
}
-bool tpm_backend_had_startup_error(TPMBackend *s)
+int tpm_backend_startup_tpm(TPMBackend *s, size_t buffersize)
{
+ int res = 0;
TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
- return k->ops->had_startup_error(s);
+ /* terminate a running TPM */
+ tpm_backend_finish_sync(s);
+
+ res = k->startup_tpm ? k->startup_tpm(s, buffersize) : 0;
+
+ s->had_startup_error = (res != 0);
+
+ return res;
}
-size_t tpm_backend_realloc_buffer(TPMBackend *s, TPMSizedBuffer *sb)
+bool tpm_backend_had_startup_error(TPMBackend *s)
{
- TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
-
- return k->ops->realloc_buffer(sb);
+ return s->had_startup_error;
}
-void tpm_backend_deliver_request(TPMBackend *s)
+void tpm_backend_deliver_request(TPMBackend *s, TPMBackendCmd *cmd)
{
- TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
+ ThreadPool *pool = aio_get_thread_pool(qemu_get_aio_context());
- k->ops->deliver_request(s);
+ if (s->cmd != NULL) {
+ error_report("There is a TPM request pending");
+ return;
+ }
+
+ s->cmd = cmd;
+ object_ref(OBJECT(s));
+ thread_pool_submit_aio(pool, tpm_backend_worker_thread, s,
+ tpm_backend_request_completed, s);
}
void tpm_backend_reset(TPMBackend *s)
{
TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
- k->ops->reset(s);
+ if (k->reset) {
+ k->reset(s);
+ }
+
+ tpm_backend_finish_sync(s);
+
+ s->had_startup_error = false;
}
void tpm_backend_cancel_cmd(TPMBackend *s)
{
TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
- k->ops->cancel_cmd(s);
+ k->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);
+ return k->get_tpm_established_flag ?
+ k->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(s, locty);
+ return k->reset_tpm_established_flag ?
+ k->reset_tpm_established_flag(s, locty) : 0;
}
TPMVersion tpm_backend_get_tpm_version(TPMBackend *s)
{
TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
- return k->ops->get_tpm_version(s);
+ return k->get_tpm_version(s);
}
-static bool tpm_backend_prop_get_opened(Object *obj, Error **errp)
+size_t tpm_backend_get_buffer_size(TPMBackend *s)
{
- TPMBackend *s = TPM_BACKEND(obj);
+ TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
- return s->opened;
+ return k->get_buffer_size(s);
}
-void tpm_backend_open(TPMBackend *s, Error **errp)
+TPMInfo *tpm_backend_query_tpm(TPMBackend *s)
{
- 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);
+ TPMInfo *info = g_new0(TPMInfo, 1);
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;
- }
- }
+ TPMIfClass *tic = TPM_IF_GET_CLASS(s->tpmif);
- s->opened = true;
-}
+ info->id = g_strdup(s->id);
+ info->model = tic->model;
+ info->options = k->get_tpm_options(s);
-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);
+ return info;
}
-void tpm_backend_thread_deliver_request(TPMBackendThread *tbt)
+static void tpm_backend_instance_finalize(Object *obj)
{
- 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);
- }
-}
+ TPMBackend *s = TPM_BACKEND(obj);
-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;
- }
+ object_unref(OBJECT(s->tpmif));
+ g_free(s->id);
}
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 const TypeInfo tpm_if_info = {
+ .name = TYPE_TPM_IF,
+ .parent = TYPE_INTERFACE,
+ .class_size = sizeof(TPMIfClass),
+};
+
static void register_types(void)
{
type_register_static(&tpm_backend_info);
+ type_register_static(&tpm_if_info);
}
type_init(register_types);
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