From 191adc9476371ad94771609d8b9a968d9332a962 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= <marcandre.lureau@redhat.com>
Date: Mon, 6 Nov 2017 19:39:04 +0100
Subject: [PATCH] tpm-be: ask model to the TPM interface
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No need to store the mode in the backend, or to let the frontend set
it itself.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
---
 backends/tpm.c               | 4 ++--
 hw/tpm/tpm_tis.c             | 3 +--
 include/sysemu/tpm.h         | 1 +
 include/sysemu/tpm_backend.h | 1 -
 tpm.c                        | 3 ++-
 5 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/backends/tpm.c b/backends/tpm.c
index 7b108bd5d8..0c48d18775 100644
--- a/backends/tpm.c
+++ b/backends/tpm.c
@@ -148,9 +148,10 @@ TPMInfo *tpm_backend_query_tpm(TPMBackend *s)
 {
     TPMInfo *info = g_new0(TPMInfo, 1);
     TPMBackendClass *k = TPM_BACKEND_GET_CLASS(s);
+    TPMIfClass *tic = TPM_IF_GET_CLASS(s->tpmif);
 
     info->id = g_strdup(s->id);
-    info->model = s->fe_model;
+    info->model = tic->model;
     if (k->get_tpm_options) {
         info->options = k->get_tpm_options(s);
     }
@@ -204,7 +205,6 @@ static void tpm_backend_instance_init(Object *obj)
                              tpm_backend_prop_get_opened,
                              tpm_backend_prop_set_opened,
                              NULL);
-    s->fe_model = -1;
     s->bh = qemu_bh_new(tpm_backend_request_completed_bh, s);
 }
 
diff --git a/hw/tpm/tpm_tis.c b/hw/tpm/tpm_tis.c
index bf291e6eff..a780167feb 100644
--- a/hw/tpm/tpm_tis.c
+++ b/hw/tpm/tpm_tis.c
@@ -1072,8 +1072,6 @@ static void tpm_tis_realizefn(DeviceState *dev, Error **errp)
         return;
     }
 
-    s->be_driver->fe_model = TPM_MODEL_TPM_TIS;
-
     if (tpm_backend_init(s->be_driver, TPM_IF(s), errp)) {
         return;
     }
@@ -1108,6 +1106,7 @@ static void tpm_tis_class_init(ObjectClass *klass, void *data)
     dc->props = tpm_tis_properties;
     dc->reset = tpm_tis_reset;
     dc->vmsd  = &vmstate_tpm_tis;
+    tc->model = TPM_MODEL_TPM_TIS;
     tc->request_completed = tpm_tis_request_completed;
 }
 
diff --git a/include/sysemu/tpm.h b/include/sysemu/tpm.h
index e0879620e7..7b407caf25 100644
--- a/include/sysemu/tpm.h
+++ b/include/sysemu/tpm.h
@@ -40,6 +40,7 @@ typedef struct TPMIf {
 typedef struct TPMIfClass {
     InterfaceClass parent_class;
 
+    enum TpmModel model;
     void (*request_completed)(TPMIf *obj);
 } TPMIfClass;
 
diff --git a/include/sysemu/tpm_backend.h b/include/sysemu/tpm_backend.h
index df9ebd0e81..665e807a73 100644
--- a/include/sysemu/tpm_backend.h
+++ b/include/sysemu/tpm_backend.h
@@ -51,7 +51,6 @@ struct TPMBackend {
 
     /* <public> */
     char *id;
-    enum TpmModel fe_model;
 
     QLIST_ENTRY(TPMBackend) list;
 };
diff --git a/tpm.c b/tpm.c
index ab5d29e91e..4320f44c9f 100644
--- a/tpm.c
+++ b/tpm.c
@@ -200,9 +200,10 @@ TPMInfoList *qmp_query_tpm(Error **errp)
     TPMInfoList *info, *head = NULL, *cur_item = NULL;
 
     QLIST_FOREACH(drv, &tpm_backends, list) {
-        if (!tpm_models[drv->fe_model]) {
+        if (!drv->tpmif) {
             continue;
         }
+
         info = g_new0(TPMInfoList, 1);
         info->value = tpm_backend_query_tpm(drv);