tests/qtest/cdrom-test: Fix the test to also work without optional de…

…vices

It's possible to disable virtio-scsi and virtio-blk in the binaries,
so we must not run the corresponding tests if these devices are missing.

Message-Id: <20230512124033.502654-14-thuth@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/qtest/cdrom-test.c

@@ -136,9 +136,12 @@ static void add_x86_tests(void)
     }
 
     qtest_add_data_func("cdrom/boot/default", "-cdrom ", test_cdboot);
-    qtest_add_data_func("cdrom/boot/virtio-scsi",
-                        "-device virtio-scsi -device scsi-cd,drive=cdr "
-                        "-blockdev file,node-name=cdr,filename=", test_cdboot);
+    if (qtest_has_device("virtio-scsi-ccw")) {
+        qtest_add_data_func("cdrom/boot/virtio-scsi",
+                            "-device virtio-scsi -device scsi-cd,drive=cdr "
+                            "-blockdev file,node-name=cdr,filename=",
+                            test_cdboot);
+    }
     /*
      * Unstable CI test under load
      * See https://lists.gnu.org/archive/html/qemu-devel/2019-02/msg05509.html
@@ -183,10 +186,17 @@ static void add_s390x_tests(void)
 {
     if (!qtest_has_accel("tcg") && !qtest_has_accel("kvm")) {
         g_test_skip("No KVM or TCG accelerator available, skipping boot tests");
+    }
+    if (!qtest_has_device("virtio-blk-ccw")) {
         return;
     }
 
     qtest_add_data_func("cdrom/boot/default", "-cdrom ", test_cdboot);
+
+    if (!qtest_has_device("virtio-scsi-ccw")) {
+        return;
+    }
+
     qtest_add_data_func("cdrom/boot/virtio-scsi",
                         "-device virtio-scsi -device scsi-cd,drive=cdr "
                         "-blockdev file,node-name=cdr,filename=", test_cdboot);