avocado/replay_kernel.py: make tcg-icount check in run_vm()

The icount framework relies on TCG availability. If QEMU is built with
--disable-tcg we won't have icount either, and then this test will fail
with the following message in an IBM POWER9 host:

tests/avocado/replay_kernel.py:ReplayKernelNormal.test_ppc64_pseries:
ERROR: ConnectError: Failed to establish session:
(...)
/11-tests_avocado_replay_kernel.py_ReplayKernelNormal.test_ppc64_pseries/replay.bin:
cannot configure icount, TCG support not available

Although this was revealed in a specific ppc64 scenario, the TCG check
is being done in the common code inside run_vm() because all archs need
TCG to have access to icount.

Cc: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220303153517.168943-6-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>

tests/avocado/replay_kernel.py

@@ -36,6 +36,9 @@ class ReplayKernelBase(LinuxKernelTest):
 
     def run_vm(self, kernel_path, kernel_command_line, console_pattern,
                record, shift, args, replay_path):
+        # icount requires TCG to be available
+        self.require_accelerator('tcg')
+
         logger = logging.getLogger('replay')
         start_time = time.time()
         vm = self.get_vm()
@@ -243,6 +246,7 @@ class ReplayKernelNormal(ReplayKernelBase):
         """
         :avocado: tags=arch:ppc64
         :avocado: tags=machine:pseries
+        :avocado: tags=accel:tcg
         """
         kernel_url = ('https://archives.fedoraproject.org/pub/archive'
                       '/fedora-secondary/releases/29/Everything/ppc64le/os'