tests/avocado: ppc64 reverse debugging tests for pseries and powernv

These machines run reverse-debugging well enough to pass basic tests.
Wire them up.

Reviewed-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@ispras.ru>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>

tests/avocado/reverse_debugging.py

@@ -233,3 +233,32 @@ def test_aarch64_virt(self):
 
         self.reverse_debugging(
             args=('-kernel', kernel_path))
+
+class ReverseDebugging_ppc64(ReverseDebugging):
+    """
+    :avocado: tags=accel:tcg
+    """
+
+    REG_PC = 0x40
+
+    # unidentified gitlab timeout problem
+    @skipIf(os.getenv('GITLAB_CI'), 'Running on GitLab')
+    def test_ppc64_pseries(self):
+        """
+        :avocado: tags=arch:ppc64
+        :avocado: tags=machine:pseries
+        """
+        # SLOF branches back to its entry point, which causes this test
+        # to take the 'hit a breakpoint again' path. That's not a problem,
+        # just slightly different than the other machines.
+        self.endian_is_le = False
+        self.reverse_debugging()
+
+    @skipIf(os.getenv('GITLAB_CI'), 'Running on GitLab')
+    def test_ppc64_powernv(self):
+        """
+        :avocado: tags=arch:ppc64
+        :avocado: tags=machine:powernv
+        """
+        self.endian_is_le = False
+        self.reverse_debugging()