def test_libvirt_exception_cpu_features(self):
machinetype.cpu_features.invalidate()
with MonkeyPatchScope([
(machinetype.libvirtconnection, 'get',
lambda: FailingConnection()),
]):
result = machinetype.cpu_features()
self.assertEqual(result, [])
def test_cpu_features(self, arch, expected_features):
machinetype.cpu_features.invalidate()
conn = FakeConnection(arch)
with MonkeyPatchScope([
(machinetype.cpuarch, 'real', lambda: arch),
(machinetype.libvirtconnection, 'get', lambda: conn), ]):
result = machinetype.cpu_features()
self.assertEqual(result, expected_features)
def test_cpu_features_no_ibrs(self):
machinetype.cpu_features.invalidate()
conn = FakeConnection(cpuarch.X86_64,
file_name='domcaps_libvirt_x86_64_noibrs.out')
with MonkeyPatchScope([
(machinetype.cpuarch, 'real', lambda: cpuarch.X86_64),
(machinetype.libvirtconnection, 'get', lambda: conn),
]):
result = machinetype.cpu_features()
self.assertEqual(result, _EXPECTED_CPU_FEATURES_X86_64)
def _getFlagsAndFeatures():
"""
Read CPU flags from cpuinfo and CPU features from domcapabilities,
and combine them into a single list.
"""
# We need to use both flags (cpuinfo.flags()) and domcapabilites
# (machinetype.cpu_features) because they return different sets
# of flags (domcapabilities also return the content of
# arch_capabilities). The sets overlap, so we convert
# list -> set -> list to remove duplicates.
flags_and_features = list(set(cpuinfo.flags() +
machinetype.cpu_features()))
return flags_and_features + machinetype.compatible_cpu_models()
def _getFlagsAndFeatures():
"""
Read CPU flags from cpuinfo and CPU features from domcapabilities,
and combine them into a single list.
"""
# We need to use both flags (cpuinfo.flags()) and domcapabilites
# (machinetype.cpu_features) because they return different sets
# of flags (domcapabilities also return the content of
# arch_capabilities). The sets overlap, so we convert
# list -> set -> list to remove duplicates.
flags_and_features = list(set(cpuinfo.flags() +
machinetype.cpu_features()))
cpu_models = machinetype.compatible_cpu_models()
# Easier to add here than in Engine:
# If -IBRS suffix is present in any of the compatible CPU models,
# we can assume spec_ctrl feature.
for model in cpu_models:
if model.endswith('-IBRS'):
spec_ctrl = 'spec_ctrl'
if spec_ctrl not in flags_and_features:
flags_and_features.append(spec_ctrl)
break
return flags_and_features + cpu_models
