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python/qemu: Move kvm_available() to its own module
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>
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""" | ||
QEMU accel module: | ||
This module provides utilities for discover and check the availability of | ||
accelerators. | ||
""" | ||
# Copyright (C) 2015-2016 Red Hat Inc. | ||
# Copyright (C) 2012 IBM Corp. | ||
# | ||
# Authors: | ||
# Fam Zheng <famz@redhat.com> | ||
# | ||
# This work is licensed under the terms of the GNU GPL, version 2. See | ||
# the COPYING file in the top-level directory. | ||
# | ||
|
||
import os | ||
|
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# Mapping host architecture to any additional architectures it can | ||
# support which often includes its 32 bit cousin. | ||
ADDITIONAL_ARCHES = { | ||
"x86_64" : "i386", | ||
"aarch64" : "armhf" | ||
} | ||
|
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def kvm_available(target_arch=None): | ||
host_arch = os.uname()[4] | ||
if target_arch and target_arch != host_arch: | ||
if target_arch != ADDITIONAL_ARCHES.get(host_arch): | ||
return False | ||
return os.access("/dev/kvm", os.R_OK | os.W_OK) |
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