tests/avocado: Add a test for a little-endian microblaze machine

We've already got a test for a big endian microblaze machine, but so
far we lack one for a little endian machine. Now that the QEMU advent
calendar featured such an image, we can test the little endian mode,
too.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20231215161851.71508-1-thuth@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

tests/avocado/machine_microblaze.py

@@ -5,6 +5,8 @@
 # This work is licensed under the terms of the GNU GPL, version 2 or
 # later. See the COPYING file in the top-level directory.
 
+import time
+from avocado_qemu import exec_command, exec_command_and_wait_for_pattern
 from avocado_qemu import QemuSystemTest
 from avocado_qemu import wait_for_console_pattern
 from avocado.utils import archive
@@ -33,3 +35,27 @@ def test_microblaze_s3adsp1800(self):
         # The kernel sometimes gets stuck after the "This architecture ..."
         # message, that's why we don't test for a later string here. This
         # needs some investigation by a microblaze wizard one day...
+
+    def test_microblazeel_s3adsp1800(self):
+        """
+        :avocado: tags=arch:microblazeel
+        :avocado: tags=machine:petalogix-s3adsp1800
+        """
+
+        self.require_netdev('user')
+        tar_url = ('http://www.qemu-advent-calendar.org/2023/download/'
+                   'day13.tar.gz')
+        tar_hash = '6623d5fff5f84cfa8f34e286f32eff6a26546f44'
+        file_path = self.fetch_asset(tar_url, asset_hash=tar_hash)
+        archive.extract(file_path, self.workdir)
+        self.vm.set_console()
+        self.vm.add_args('-kernel', self.workdir + '/day13/xmaton.bin')
+        self.vm.add_args('-nic', 'user,tftp=' + self.workdir + '/day13/')
+        self.vm.launch()
+        wait_for_console_pattern(self, 'QEMU Advent Calendar 2023')
+        time.sleep(0.1)
+        exec_command(self, 'root')
+        time.sleep(0.1)
+        exec_command_and_wait_for_pattern(self,
+                'tftp -g -r xmaton.png 10.0.2.2 ; md5sum xmaton.png',
+                '821cd3cab8efd16ad6ee5acc3642a8ea')