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2020-05-31python/qemu/qtest: Check before accessing _qtestJohn Snow1-3/+11
It can be None; so add assertions or exceptions where appropriate to guard the access accordingly. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200514055403.18902-30-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-05-31python/qemu/qmp: assert sockfile is not NoneJohn Snow1-0/+1
In truth, if you don't do this, you'll just get a TypeError exception. Now, you'll get an AssertionError. Is this tangibly better? No. Does mypy complain less? Yes. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200514055403.18902-21-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-05-31python/qemu/qmp: use True/False for non/blocking modesJohn Snow1-2/+2
The type system doesn't want integers. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200514055403.18902-15-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-05-31python/qemu: Adjust traceback typingJohn Snow2-4/+14
mypy considers it incorrect to use `bool` to statically return false, because it will assume that it could conceivably return True, and gives different analysis in that case. Use a None return to achieve the same effect, but make mypy happy. Note: Pylint considers function signatures as code that might trip the duplicate-code checker. I'd rather not disable this as it does not trigger often in practice, so I'm disabling it as a one-off and filed a change request; see https://github.com/PyCQA/pylint/issues/3619 Signed-off-by: John Snow <jsnow@redhat.com> Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200514055403.18902-14-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-05-31python/qemu: fix socket.makefile() typingJohn Snow2-7/+15
Note: A bug in typeshed (https://github.com/python/typeshed/issues/3977) misinterprets the type of makefile(). Work around this by explicitly stating that we are opening a text-mode file. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200514055403.18902-13-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-05-31python/qemu: remove Python2 style super() callsJohn Snow2-9/+8
Use the Python3 style instead. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200514055403.18902-12-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-05-31python/qemu: delint; add flake8 configJohn Snow4-9/+19
Mostly, ignore the "no bare except" rule, because flake8 is not contextual and cannot determine if we re-raise. Pylint can, though, so always prefer pylint for that. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200528222129.23826-5-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-05-31python/qemu: delint and add pylintrcJohn Snow3-18/+88
Bring our these files up to speed with pylint 2.5.0. Add a pylintrc file to formalize which pylint subset we are targeting. The similarity ignore is there to suppress similarity reports across imports, which for typing constants, are going to trigger this report erroneously. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200528222129.23826-4-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-05-31python/qemu/machine: remove logging configurationJohn Snow1-3/+0
Python 3.5 and above do not print a warning when logging is not configured. As a library, it's best practice to leave logging configuration to the client executable. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200514055403.18902-22-jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-05-31python/qemu/machine: add kill() methodVladimir Sementsov-Ogievskiy1-3/+9
Add method to hard-kill vm, without any quit commands. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Message-Id: <20200217150246.29180-19-vsementsov@virtuozzo.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-03-21python/qemu: Kill QEMU process if 'quit' doesn't workKevin Wolf1-0/+1
With a QEMU bug, it can happen that the QEMU process doesn't react to a 'quit' QMP command. If we got an exception during previous QMP communication (e.g. iotests Timeout expiring), we could also be in an inconsistent state where after sending 'quit' we immediately read an old response and close the socket even though the 'quit' command wasn't processed yet. Both cases would lead to a hanging test. Fix this by waiting for the QEMU process to exit after sending 'quit' with a timeout, and if it doesn't happen within three seconds, send SIGKILL. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20200313083617.8326-3-kwolf@redhat.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2020-03-17python/qemu/qmp.py: QMP debug with VM labelOksana Vohchana2-2/+6
QEMUMachine writes some messages to the default logger. But it sometimes hard to read the output if we have requests to more than one VM. This patch adds a label to the logger in the debug mode. Signed-off-by: Oksana Vohchana <ovoshcha@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Wainer dos Santos Moschetta <wainersm@redhat.com> Reviewed-by: Cleber Rosa <crosa@redhat.com> Message-Id: <20200316103203.10046-1-ovoshcha@redhat.com> Signed-off-by: Cleber Rosa <crosa@redhat.com>
2020-02-07python/qemu/machine: Allow to use other serial consoles than defaultPhilippe Mathieu-Daudé1-1/+9
Currently the QEMU Python module limits the QEMUMachine class to use the first serial console. Some machines/guest might use another console than the first one as the 'boot console'. For example the Raspberry Pi uses the second (AUX) console. To be able to use the Nth console as default, we simply need to connect all the N - 1 consoles to the null chardev. Add an index argument, so we can use a specific serial console as default. Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Liam Merwick <liam.merwick@oracle.com> Tested-by: Liam Merwick <liam.merwick@oracle.com> Reviewed-by: Wainer dos Santos Moschetta <wainersm@redhat.com> Message-Id: <20200120235159.18510-5-f4bug@amsat.org> [PMD: zero-initialize _console_index in __init__()] Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-02-07python: Treat None-return of greeting cmdLukáš Doktor1-1/+1
In case qemu process dies the "monitor.cmd" returns None which gets passed to the "__negotiate_capabilities" and leads to unhandled exception. Let's only check the resp in case it has a value. Signed-off-by: Lukáš Doktor <ldoktor@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Wainer dos Santos Moschetta <wainersm@redhat.com> Message-Id: <20200120071202.30646-1-ldoktor@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-02-07python/qemu: accel: Fix kvm_available() on ppc64leWainer dos Santos Moschetta1-1/+2
On ppc64le, the accel.kvm_available() check may wrongly return False because the host arch (as returned by os.uname[4]) and the target arch (ppc64) mismatch. In order to solve this it is added an ppc64le -> ppc64 mapping which is used as an fallback verification. Fixes: 53a049d7d78e5ccf6d4c0d7 Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200205203250.30526-5-wainersm@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-02-07python/qemu: qmp: Remove unnused attributesWainer dos Santos Moschetta1-4/+0
The `error` and `timeout` attributes in QEMUMonitorProtocol are not used, so this delete them. Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20191227134101.244496-6-wainersm@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-02-07python/qemu: qmp: Make QEMUMonitorProtocol a context managerWainer dos Santos Moschetta1-2/+13
This implement the __enter__ and __exit__ functions on QEMUMonitorProtocol class so that it can be used on 'with' statement and the resources will be free up on block end: with QEMUMonitorProtocol(socket_path) as qmp: qmp.connect() qmp.command('query-status') Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Message-Id: <20200204141111.3207-5-wainersm@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-02-07python/qemu: qmp: Make accept()'s timeout configurableWainer dos Santos Moschetta1-2/+9
Currently the timeout of QEMUMonitorProtocol.accept() is hard-coded to 15.0 seconds. This added the parameter `timeout` so the value can be configured by the user. Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Message-Id: <20200204141111.3207-4-wainersm@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-02-07python/qemu: Delint the qmp moduleWainer dos Santos Moschetta1-10/+41
This clean up the pylint-3 report on qmp: ************* Module qemu.qmp python/qemu/qmp.py:1:0: C0111: Missing module docstring (missing-docstring) python/qemu/qmp.py:17:0: C0111: Missing class docstring (missing-docstring) python/qemu/qmp.py:21:0: C0111: Missing class docstring (missing-docstring) python/qemu/qmp.py:25:0: C0111: Missing class docstring (missing-docstring) python/qemu/qmp.py:29:0: C0111: Missing class docstring (missing-docstring) python/qemu/qmp.py:33:0: C0111: Missing class docstring (missing-docstring) python/qemu/qmp.py:33:0: R0205: Class 'QEMUMonitorProtocol' inherits from object, can be safely removed from bases in python3 (useless-object-inheritance) python/qemu/qmp.py:80:4: R1710: Either all return statements in a function should return an expression, or none of them should. (inconsistent-return-statements) python/qemu/qmp.py:131:4: R1710: Either all return statements in a function should return an expression, or none of them should. (inconsistent-return-statements) python/qemu/qmp.py:159:4: R1710: Either all return statements in a function should return an expression, or none of them should. (inconsistent-return-statements) python/qemu/qmp.py:245:4: C0111: Missing method docstring (missing-docstring) python/qemu/qmp.py:249:4: C0111: Missing method docstring (missing-docstring) python/qemu/qmp.py:252:4: C0111: Missing method docstring (missing-docstring) python/qemu/qmp.py:255:4: C0111: Missing method docstring (missing-docstring) Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20191227134101.244496-3-wainersm@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-02-07python/qemu: qmp: Replace socket.error with OSErrorWainer dos Santos Moschetta1-8/+8
The socket.error is deprecated from Python 3.3, instead it is made a link to OSError. This change replaces the occurences of socket.error with OSError. Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Message-Id: <20191227134101.244496-2-wainersm@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2019-12-16python/qemu: Remove unneeded imports in __init__Wainer dos Santos Moschetta1-6/+0
__init_.py import some sub-modules unnecessarily. So let's clean it up. Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com> Suggested-by: Cleber Rosa <crosa@redhat.com> Reviewed-by: Cleber Rosa <crosa@redhat.com> Tested-by: Cleber Rosa <crosa@redhat.com> Message-Id: <20191216191438.93418-6-wainersm@redhat.com> Signed-off-by: Cleber Rosa <crosa@redhat.com>
2019-12-16python/qemu: accel: Add tcg_available() methodWainer dos Santos Moschetta1-0/+8
This adds a method to check if the tcg accelerator is enabled in the QEMU binary. Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Cleber Rosa <crosa@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Cleber Rosa <crosa@redhat.com> Message-Id: <20191216191438.93418-5-wainersm@redhat.com> Signed-off-by: Cleber Rosa <crosa@redhat.com>
2019-12-16python/qemu: accel: Strengthen kvm_available() checksWainer dos Santos Moschetta1-6/+21
Currently kvm_available() checks for the presence of kvm module and, if target and host arches don't mismatch. This patch adds an 3rd checking: if QEMU binary was compiled with kvm support. Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Cleber Rosa <crosa@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Cleber Rosa <crosa@redhat.com> Message-Id: <20191216191438.93418-4-wainersm@redhat.com> Signed-off-by: Cleber Rosa <crosa@redhat.com>
2019-12-16python/qemu: accel: Add list_accel() methodWainer dos Santos Moschetta1-0/+23
Since commit cbe6d6365a48 the command `qemu -accel help` returns the list of accelerators enabled in the QEMU binary. This adds the list_accel() method which return that same list. Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com> Message-Id: <20191216191438.93418-3-wainersm@redhat.com> Reviewed-by: Cleber Rosa <crosa@redhat.com> Tested-by: Cleber Rosa <crosa@redhat.com> Signed-off-by: Cleber Rosa <crosa@redhat.com>
2019-12-16python/qemu: Move kvm_available() to its own moduleWainer dos Santos Moschetta2-19/+32
This creates the 'accel' Python module to be the home for utilities that deal with accelerators. Also moved kvm_available() from __init__.py to this new module. Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20191216191438.93418-2-wainersm@redhat.com> Signed-off-by: Cleber Rosa <crosa@redhat.com>
2019-12-16python/qemu: Add set_qmp_monitor() to QEMUMachineWainer dos Santos Moschetta1-25/+45
The QEMUMachine VM has a monitor setup on which an QMP connection is always attempted on _post_launch() (executed by launch()). In case the QEMU process immediatly exits then the qmp.accept() (used to establish the connection) stalls until it reaches timeout and consequently an exception raises. That behavior is undesirable when, for instance, it needs to gather information from the QEMU binary ($ qemu -cpu list) or a test which launches the VM expecting its failure. This patch adds the set_qmp_monitor() method to QEMUMachine that allows turn off the creation of the monitor machinery on VM launch. Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com> Reviewed-by: Cleber Rosa <crosa@redhat.com> Message-Id: <20191211185536.16962-2-wainersm@redhat.com> [Cleber: trivial indentation fix] Signed-off-by: Cleber Rosa <crosa@redhat.com>
2019-10-28Python libs: close console sockets before shutting down the VMsCleber Rosa1-4/+7
Currently, the console socket on QEMUMachine is closed after the QMP command to gracefully exit QEMU is executed. Because of a possible deadlock (QEMU waiting for the socket to become writable) let's close the console socket earlier. Reference: <20190607034214.GB22416@habkost.net> Reference: https://bugs.launchpad.net/qemu/+bug/1829779 From: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Cleber Rosa <crosa@redhat.com> Message-Id: <20190911023558.4880-2-crosa@redhat.com>
2019-10-28iotests.py: Store socket files in $SOCK_DIRMax Reitz2-6/+18
iotests.py itself does not store socket files, but machine.py and qtest.py do. iotests.py needs to pass the respective path to them, and they need to adhere to it. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Message-id: 20191017133155.5327-3-mreitz@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com>
2019-09-19Replace '-machine accel=xyz' with '-accel xyz'Thomas Huth1-1/+1
We've got a separate option to configure the accelerator nowadays, which is shorter to type and the preferred way of specifying an accelerator. Use it in the source and examples to show that it is the favored option. (However, do not touch the places yet which also specify other machine options or multiple accelerators - these are currently still better handled with one single "-machine" statement instead) Signed-off-by: Thomas Huth <thuth@redhat.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20190904052739.22123-1-thuth@redhat.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2019-07-19iotests: Add @has_quit to vm.shutdown()Max Reitz1-2/+3
If a test has issued a quit command already (which may be useful to do explicitly because the test wants to show its effects), QEMUMachine.shutdown() should not do so again. Otherwise, the VM may well return an ECONNRESET which will lead QEMUMachine.shutdown() to killing it, which then turns into a "qemu received signal 9" line. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2019-07-01machine.py: minor delintingJohn Snow1-11/+22
Since we're out in a new module, do a quick cursory pass of some of the more obvious style issues. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20190627212816.27298-3-jsnow@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2019-07-01python/qemu: split QEMUMachine out from underneath __init__.pyJohn Snow3-502/+522
It's not obvious that something named __init__.py actually houses important code that isn't relevant to python packaging glue. Move the QEMUMachine and related error classes out into their own module. Adjust users to the new import location. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20190627212816.27298-2-jsnow@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2019-06-14event_match: always match on None valueJohn Snow1-10/+14
Before, event_match didn't always recurse if the event value was not a dictionary, and would instead check for equality immediately. By delaying equality checking to post-recursion, we can allow leaf values like "5" to match "None" and take advantage of the generic None-returns-True clause. This makes the matching a little more obviously consistent at the expense of being able to check for explicit None values, which is probably not that important given what this function is used for. Signed-off-by: John Snow <jsnow@redhat.com> Message-id: 20190528183857.26167-1-jsnow@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com>
2019-06-14QEMUMachine: add events_wait methodJohn Snow1-20/+49
Instead of event_wait which looks for a single event, add an events_wait which can look for any number of events simultaneously. However, it will still only return one at a time, whichever happens first. Signed-off-by: John Snow <jsnow@redhat.com> Message-id: 20190523170643.20794-4-jsnow@redhat.com Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
2019-05-02scripts/qemu.py: support adding a console with the default serial deviceCleber Rosa1-33/+17
The set_console() utility function either adds a device based on the explicitly given device type, or adds a known good type of device based on the machine type. But, for a number of machine types, it may be impossible or inconvenient to add the devices by 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 the "-serial" option is going to be added to the QEMU command line, instead of raising exceptions. Based on testing with different machine types, the CONSOLE_DEV_TYPES is not necessary anymore, so it's being removed, as is the logic to use it. Signed-off-by: Cleber Rosa <crosa@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Message-Id: <20190312171824.5134-13-crosa@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2019-03-07Merge remote-tracking branch 'remotes/cleber/tags/python-next-pull-request' ↵Peter Maydell3-0/+890
into staging Python queue, 2019-02-22 Python: * introduce "python" directory with module namespace * log QEMU launch command line on qemu.QEMUMachine Acceptance Tests: * initrd 4GiB+ test * migration test * multi vm support in test class * bump Avocado version and drop ":avocado: enable" # gpg: Signature made Fri 22 Feb 2019 19:37:07 GMT # gpg: using RSA key 657E8D33A5F209F3 # gpg: Good signature from "Cleber Rosa <crosa@redhat.com>" [marginal] # gpg: WARNING: This key is not certified with sufficiently trusted signatures! # gpg: It is not certain that the signature belongs to the owner. # Primary key fingerprint: 7ABB 96EB 8B46 B94D 5E0F E9BB 657E 8D33 A5F2 09F3 * remotes/cleber/tags/python-next-pull-request: Acceptance tests: expect boot to extract 2GiB+ initrd with linux-v4.16 Acceptance tests: use linux-3.6 and set vm memory to 4GiB tests.acceptance: adds simple migration test tests.acceptance: adds multi vm capability for acceptance tests scripts/qemu.py: log QEMU launch command line Introduce a Python module structure Acceptance tests: drop usage of ":avocado: enable" Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-02-22scripts/qemu.py: log QEMU launch command lineCleber Rosa1-0/+1
Even when the launch of QEMU succeeds, it's useful to have the command line recorded. Reviewed-by: Caio Carrara <ccarrara@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Cleber Rosa <crosa@redhat.com> Message-Id: <20190202005610.24048-2-crosa@redhat.com> Signed-off-by: Cleber Rosa <crosa@redhat.com>
2019-02-22Introduce a Python module structureCleber Rosa3-0/+890
This is a simple move of Python code that wraps common QEMU functionality, and are used by a number of different tests and scripts. By treating that code as a real Python module, we can more easily: * reuse code * have a proper place for the module's own unittests * apply a more consistent style * generate documentation Signed-off-by: Cleber Rosa <crosa@redhat.com> Reviewed-by: Caio Carrara <ccarrara@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20190206162901.19082-2-crosa@redhat.com> Signed-off-by: Cleber Rosa <crosa@redhat.com>
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