migration-test: Allow test to run without uffd

We used to stop running all tests if uffd is not detected.  However
logically that's only needed for postcopy not the rest of tests.

Keep running the rest when still possible.

Signed-off-by: Peter Xu <peterx@redhat.com>
Tested-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20220728133516.92061-3-peterx@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/qtest/migration-test.c

@@ -2424,14 +2424,11 @@ int main(int argc, char **argv)
 {
     char template[] = "/tmp/migration-test-XXXXXX";
     const bool has_kvm = qtest_has_accel("kvm");
+    const bool has_uffd = ufd_version_check();
     int ret;
 
     g_test_init(&argc, &argv, NULL);
 
-    if (!ufd_version_check()) {
-        return g_test_run();
-    }
-
     /*
      * On ppc64, the test only works with kvm-hv, but not with kvm-pr and TCG
      * is touchy due to race conditions on dirty bits (especially on PPC for
@@ -2460,13 +2457,15 @@ int main(int argc, char **argv)
 
     module_call_init(MODULE_INIT_QOM);
 
-    qtest_add_func("/migration/postcopy/unix", test_postcopy);
-    qtest_add_func("/migration/postcopy/plain", test_postcopy);
-    qtest_add_func("/migration/postcopy/recovery/plain",
-                   test_postcopy_recovery);
-    qtest_add_func("/migration/postcopy/preempt/plain", test_postcopy_preempt);
-    qtest_add_func("/migration/postcopy/preempt/recovery/plain",
-                    test_postcopy_preempt_recovery);
+    if (has_uffd) {
+        qtest_add_func("/migration/postcopy/unix", test_postcopy);
+        qtest_add_func("/migration/postcopy/plain", test_postcopy);
+        qtest_add_func("/migration/postcopy/recovery/plain",
+                       test_postcopy_recovery);
+        qtest_add_func("/migration/postcopy/preempt/plain", test_postcopy_preempt);
+        qtest_add_func("/migration/postcopy/preempt/recovery/plain",
+                       test_postcopy_preempt_recovery);
+    }
 
     qtest_add_func("/migration/bad_dest", test_baddest);
     qtest_add_func("/migration/precopy/unix/plain", test_precopy_unix_plain);
@@ -2474,18 +2473,21 @@ int main(int argc, char **argv)
 #ifdef CONFIG_GNUTLS
     qtest_add_func("/migration/precopy/unix/tls/psk",
                    test_precopy_unix_tls_psk);
-    /*
-     * NOTE: psk test is enough for postcopy, as other types of TLS
-     * channels are tested under precopy.  Here what we want to test is the
-     * general postcopy path that has TLS channel enabled.
-     */
-    qtest_add_func("/migration/postcopy/tls/psk", test_postcopy_tls_psk);
-    qtest_add_func("/migration/postcopy/recovery/tls/psk",
-                   test_postcopy_recovery_tls_psk);
-    qtest_add_func("/migration/postcopy/preempt/tls/psk",
-                   test_postcopy_preempt_tls_psk);
-    qtest_add_func("/migration/postcopy/preempt/recovery/tls/psk",
-                   test_postcopy_preempt_all);
+
+    if (has_uffd) {
+        /*
+         * NOTE: psk test is enough for postcopy, as other types of TLS
+         * channels are tested under precopy.  Here what we want to test is the
+         * general postcopy path that has TLS channel enabled.
+         */
+        qtest_add_func("/migration/postcopy/tls/psk", test_postcopy_tls_psk);
+        qtest_add_func("/migration/postcopy/recovery/tls/psk",
+                       test_postcopy_recovery_tls_psk);
+        qtest_add_func("/migration/postcopy/preempt/tls/psk",
+                       test_postcopy_preempt_tls_psk);
+        qtest_add_func("/migration/postcopy/preempt/recovery/tls/psk",
+                       test_postcopy_preempt_all);
+    }
 #ifdef CONFIG_TASN1
     qtest_add_func("/migration/precopy/unix/tls/x509/default-host",
                    test_precopy_unix_tls_x509_default_host);