[Bug 1922611] Re: Acceptance Tests: migration fails on sparc target

[Philippe Mathieu-Daudé]

6cc88d6bf932a905ce36e933dc078eeb6b54ac92 is the first bad commit:

commit 6cc88d6bf932a905ce36e933dc078eeb6b54ac92
Author: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Date:   Thu Mar 4 22:10:34 2021 +0000

    esp: remove dma_left from ESPState

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https://bugs.launchpad.net/bugs/1922611

Title:
  Acceptance Tests: migration fails on sparc target

Status in QEMU:
  New

Bug description:
  QEMU fails migration when using a sparc target.

  This cab be verified/reproduced with the
  `tests/acceptance/migration.py` test.  Running it with:

   $ make check-venv
   $ ./tests/venv/bin/avocado --show=test run -p qemu_bin=./qemu-system-sparc 
tests/acceptance/migration.py:Migration.test_migration_with_tcp_localhost

  Right after a QMP `query-migrate` is executed, communication with the
  monitor is lost:

  >>> {'execute': 'query-migrate'}
  <<< {'timestamp': {'seconds': 1617667984, 'microseconds': 330282}, 'event': 
'STOP'}
  <<< {'return': {'blocked': False, 'status': 'completed', 'setup-time': 0, 
'downtime': 1, 'total-time': 15, 'ram': {'total': 135274496, 
'postcopy-requests': 0, 'dirty-sync-count': 2, 'multifd-bytes': 0, 
'pages-per-second': 0, 'page-size': 4096, 'remaining': 0, 'mbps': 
301.2234666666667, 'transferred': 528703, 'duplicate': 33202, 
'dirty-pages-rate': 0, 'skipped': 0, 'normal-bytes': 229376, 'normal': 56}}}
  >>> {'execute': 'query-migrate'}

  Reproduced traceback from: 
/var/lib/users/cleber/build/qemu/tests/venv/lib64/python3.7/site-packages/avocado/core/test.py:756
  Traceback (most recent call last):
    File "/var/lib/users/cleber/build/qemu/tests/acceptance/migration.py", line 
80, in test_migration_with_tcp_localhost
      self.do_migrate(dest_uri)
    File "/var/lib/users/cleber/build/qemu/tests/acceptance/migration.py", line 
69, in do_migrate
      self.assert_migration(source_vm, dest_vm)
    File "/var/lib/users/cleber/build/qemu/tests/acceptance/migration.py", line 
41, in assert_migration
      args=(dst_vm,))
    File 
"/var/lib/users/cleber/build/qemu/tests/venv/lib64/python3.7/site-packages/avocado/utils/wait.py",
 line 34, in wait_for
      output = func(*args, **kwargs)
    File "/var/lib/users/cleber/build/qemu/tests/acceptance/migration.py", line 
31, in migration_finished
      return vm.command('query-migrate')['status'] in ('completed', 'failed')
    File "/home/cleber/src/qemu/python/qemu/machine.py", line 572, in command
      return self._qmp.command(cmd, **qmp_args)
    File "/home/cleber/src/qemu/python/qemu/qmp.py", line 284, in command
      ret = self.cmd(cmd, kwds)
    File "/home/cleber/src/qemu/python/qemu/qmp.py", line 278, in cmd
      return self.cmd_obj(qmp_cmd)
    File "/home/cleber/src/qemu/python/qemu/qmp.py", line 256, in cmd_obj
      self.__sock.sendall(json.dumps(qmp_cmd).encode('utf-8'))
  BrokenPipeError: [Errno 32] Broken pipe 

  The qemu-system-sparc binary outputs:

   qemu-system-sparc: warning: nic lance.0 has no peer
   qemu-system-sparc: Missing section footer for sysbusespscsi
   qemu-system-sparc: load of migration failed: Invalid argument

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