python/qemu/__init__.py

   1 # QEMU library
   2 #
   3 # Copyright (C) 2015-2016 Red Hat Inc.
   4 # Copyright (C) 2012 IBM Corp.
   5 #
   6 # Authors:
   7 #  Fam Zheng <famz@redhat.com>
   8 #
   9 # This work is licensed under the terms of the GNU GPL, version 2.  See
  10 # the COPYING file in the top-level directory.
  11 #
  12 # Based on qmp.py.
  13 #
  14
  15 import logging
  16 import os
  17
  18 from . import qmp
  19 from . import machine
  20
  21 LOG = logging.getLogger(__name__)
  22
  23 # Mapping host architecture to any additional architectures it can
  24 # support which often includes its 32 bit cousin.
  25 ADDITIONAL_ARCHES = {
  26     "x86_64" : "i386",
  27     "aarch64" : "armhf"
  28 }
  29
  30 def kvm_available(target_arch=None):
  31     host_arch = os.uname()[4]
  32     if target_arch and target_arch != host_arch:
  33         if target_arch != ADDITIONAL_ARCHES.get(host_arch):
  34             return False
  35     return os.access("/dev/kvm", os.R_OK | os.W_OK)