Copy/paste the current tests, but call the opposite endianness
machines, testing:
- petalogix-s3adsp1800-le machine (little-endian CPU) on the
  qemu-system-microblaze binary (big-endian)
- petalogix-s3adsp1800-be machine (big-endian CPU) on the
  qemu-system-microblazeel binary (little-endian).

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 .../functional/test_microblaze_s3adsp1800.py  | 21 +++++++++++++++++++
 .../test_microblazeel_s3adsp1800.py           | 19 +++++++++++++++++
 2 files changed, 40 insertions(+)

diff --git a/tests/functional/test_microblaze_s3adsp1800.py b/tests/functional/test_microblaze_s3adsp1800.py
index 2b2f782270..7f5e8b6024 100755
--- a/tests/functional/test_microblaze_s3adsp1800.py
+++ b/tests/functional/test_microblaze_s3adsp1800.py
@@ -36,5 +36,26 @@ def test_microblaze_s3adsp1800_be(self):
         # message, that's why we don't test for a later string here. This
         # needs some investigation by a microblaze wizard one day...
 
+    ASSET_IMAGE_LE = Asset(
+        ('http://www.qemu-advent-calendar.org/2023/download/day13.tar.gz'),
+        'b9b3d43c5dd79db88ada495cc6e0d1f591153fe41355e925d791fbf44de50c22')
+
+    def test_microblaze_s3adsp1800_le(self):
+        self.require_netdev('user')
+        self.set_machine('petalogix-s3adsp1800-le')
+        file_path = self.ASSET_IMAGE_LE.fetch()
+        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')
+
 if __name__ == '__main__':
     QemuSystemTest.main()
diff --git a/tests/functional/test_microblazeel_s3adsp1800.py b/tests/functional/test_microblazeel_s3adsp1800.py
index 1aee5149fb..60543009ba 100755
--- a/tests/functional/test_microblazeel_s3adsp1800.py
+++ b/tests/functional/test_microblazeel_s3adsp1800.py
@@ -38,5 +38,24 @@ def test_microblazeel_s3adsp1800_le(self):
                 'tftp -g -r xmaton.png 10.0.2.2 ; md5sum xmaton.png',
                 '821cd3cab8efd16ad6ee5acc3642a8ea')
 
+    ASSET_IMAGE_BE = Asset(
+        ('https://qemu-advcal.gitlab.io/qac-best-of-multiarch/download/'
+         'day17.tar.xz'),
+        '3ba7439dfbea7af4876662c97f8e1f0cdad9231fc166e4861d17042489270057')
+
+    def test_microblazeel_s3adsp1800_be(self):
+        self.set_machine('petalogix-s3adsp1800-be')
+        file_path = self.ASSET_IMAGE_BE.fetch()
+        archive_extract(file_path, self.workdir)
+        self.vm.set_console()
+        self.vm.add_args('-kernel', self.workdir + '/day17/ballerina.bin')
+        self.vm.launch()
+        wait_for_console_pattern(self, 'This architecture does not have '
+                                       'kernel memory protection')
+        # Note:
+        # 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...
+
 if __name__ == '__main__':
     QemuSystemTest.main()
-- 
2.45.2