tests: Use QMP to check whether a TPM device model is available

Use QMP to check whether a given TPM device model is available and if it
is not the case then do not register the tests that require it.

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20210802215246.1433175-9-stefanb@linux.ibm.com

1 files changed, 38 insertions, 0 deletions

diff --git a/tests/qtest/tpm-emu.c b/tests/qtest/tpm-emu.c
index 32c704194b..2994d1cf42 100644
--- a/tests/qtest/tpm-emu.c
+++ b/tests/qtest/tpm-emu.c
@@ -16,6 +16,8 @@
 #include "backends/tpm/tpm_ioctl.h"
 #include "io/channel-socket.h"
 #include "qapi/error.h"
+#include "qapi/qmp/qlist.h"
+#include "qapi/qmp/qstring.h"
 #include "tpm-emu.h"
 
 void tpm_emu_test_wait_cond(TPMTestState *s)
@@ -192,3 +194,39 @@ void *tpm_emu_ctrl_thread(void *data)
     object_unref(OBJECT(lioc));
     return NULL;
 }
+
+bool tpm_model_is_available(const char *args, const char *tpm_if)
+{
+    QTestState *qts;
+    QDict *rsp_tpm;
+    bool ret = false;
+
+    qts = qtest_init(args);
+    if (!qts) {
+        return false;
+    }
+
+    rsp_tpm = qtest_qmp(qts, "{ 'execute': 'query-tpm'}");
+    if (!qdict_haskey(rsp_tpm, "error")) {
+        QDict *rsp_models = qtest_qmp(qts,
+                                      "{ 'execute': 'query-tpm-models'}");
+        if (qdict_haskey(rsp_models, "return")) {
+            QList *models = qdict_get_qlist(rsp_models, "return");
+            QListEntry *e;
+
+            QLIST_FOREACH_ENTRY(models, e) {
+                QString *s = qobject_to(QString, qlist_entry_obj(e));
+                const char *ename = qstring_get_str(s);
+                if (!strcmp(ename, tpm_if)) {
+                    ret = true;
+                    break;
+                }
+            }
+        }
+        qobject_unref(rsp_models);
+    }
+    qobject_unref(rsp_tpm);
+    qtest_quit(qts);
+
+    return ret;
+}