The set_console() utility function traditionally adds a device either
based on the explicitly given device type, or based on the machine type,
a known good type of device.
But, for a number of machine types, it may be impossible or
inconvenient to add the devices my means of "-device" command line
options, and then it may better to just use the "-serial" option and
let QEMU itself, based on the machine type, set the device
accordingly.
To achieve that, the behavior of set_console() now flags the intention
to add a console device on launch(), and if no explicit device type is
given, and there's no definition on CONSOLE_DEV_TYPES, the "-serial"
is going to be added to the QEMU command line, instead of raising
exceptions.
Signed-off-by: Cleber Rosa <cr...@redhat.com>
---
scripts/qemu.py | 28 +++++++++++++++-------------
1 file changed, 15 insertions(+), 13 deletions(-)
diff --git a/scripts/qemu.py b/scripts/qemu.py
index ec3567d4e2..88e1608b42 100644
--- a/scripts/qemu.py
+++ b/scripts/qemu.py
@@ -121,6 +121,7 @@ class QEMUMachine(object):
self._temp_dir = None
self._launched = False
self._machine = None
+ self._console_set = False
self._console_device_type = None
self._console_address = None
self._console_socket = None
@@ -240,13 +241,17 @@ class QEMUMachine(object):
'-display', 'none', '-vga', 'none']
if self._machine is not None:
args.extend(['-machine', self._machine])
- if self._console_device_type is not None:
+ if self._console_set:
self._console_address = os.path.join(self._temp_dir,
self._name + "-console.sock")
chardev = ('socket,id=console,path=%s,server,nowait' %
self._console_address)
- device = '%s,chardev=console' % self._console_device_type
- args.extend(['-chardev', chardev, '-device', device])
+ args.extend(['-chardev', chardev])
+ if self._console_device_type is None:
+ args.extend(['-serial', 'chardev:console'])
+ else:
+ device = '%s,chardev=console' % self._console_device_type
+ args.extend(['-device', device])
return args
def _pre_launch(self):
@@ -479,23 +484,20 @@ class QEMUMachine(object):
machine launch time, as it depends on the temporary directory
to be created.
- @param device_type: the device type, such as "isa-serial"
+ @param device_type: the device type, such as "isa-serial". If
+ None is given (the default value) a "-serial
+ chardev:console" command line argument will
+ be used instead, resorting to the machine's
+ default device type.
@raises: QEMUMachineAddDeviceError if the device type is not given
and can not be determined.
"""
- if device_type is None:
- if self._machine is None:
- raise QEMUMachineAddDeviceError("Can not add a console device:"
- " QEMU instance without a "
- "defined machine type")
+ self._console_set = True
+ if device_type is None and self._machine is not None:
for regex, device in CONSOLE_DEV_TYPES.items():
if re.match(regex, self._machine):
device_type = device
break
- if device_type is None:
- raise QEMUMachineAddDeviceError("Can not add a console device:"
- " no matching console device "
- "type definition")
self._console_device_type = device_type
@property
--
2.20.1
