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#
# Copyright 2010 Red Hat, Inc.
# Cole Robinson <crobinso@redhat.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301 USA.
from virtinst.xmlbuilder import XMLBuilder, XMLProperty
class CPUFeature(XMLBuilder):
"""
Class for generating <cpu> child <feature> XML
"""
POLICIES = ["force", "require", "optional", "disable", "forbid"]
_XML_ROOT_XPATH = "/domain/cpu/feature"
_XML_PROP_ORDER = ["_xmlname", "policy"]
def __init__(self, conn, name, parsexml=None, parsexmlnode=None):
XMLBuilder.__init__(self, conn, parsexml, parsexmlnode)
self._name = name
self._xmlname = name
def _get_name(self):
return self._xmlname
name = property(_get_name)
def _name_xpath(self):
return "./cpu/feature[@name='%s']/@name" % self._name
_xmlname = XMLProperty(name="feature name",
make_getter_xpath_cb=_name_xpath,
make_setter_xpath_cb=_name_xpath)
def _policy_xpath(self):
return "./cpu/feature[@name='%s']/@policy" % self._name
policy = XMLProperty(name="feature policy",
make_getter_xpath_cb=_policy_xpath,
make_setter_xpath_cb=_policy_xpath)
class CPU(XMLBuilder):
"""
Class for generating <cpu> XML
"""
MATCHS = ["minimum", "exact", "strict"]
_XML_ROOT_XPATH = "/domain/cpu"
_XML_PROP_ORDER = ["mode", "match", "model", "vendor",
"sockets", "cores", "threads", "_features"]
def __init__(self, conn, parsexml=None, parsexmlnode=None):
self._features = []
XMLBuilder.__init__(self, conn, parsexml, parsexmlnode)
def _parsexml(self, xml, node):
XMLBuilder._parsexml(self, xml, node)
for node in self._xml_node.children or []:
if node.name != "feature":
continue
if not node.prop("name"):
continue
feature = CPUFeature(self.conn, node.prop("name"),
parsexmlnode=self._xml_node)
self._features.append(feature)
def add_feature(self, name, policy="require"):
feature = CPUFeature(self.conn, name, parsexmlnode=self._xml_node)
feature.policy = policy
self._features.append(feature)
def remove_feature(self, feature):
self._features.remove(feature)
feature.clear()
def _get_features(self):
return self._features[:]
features = property(_get_features)
def copy_host_cpu(self):
"""
Enact the equivalent of qemu -cpu host, pulling all info
from capabilities about the host CPU
"""
cpu = self.conn.caps.host.cpu
if not cpu.model:
raise ValueError(_("No host CPU reported in capabilities"))
self.mode = "custom"
self.match = "exact"
self.model = cpu.model
self.vendor = cpu.vendor
for feature in self.features:
self.remove_feature(feature)
for name in cpu.features.names():
self.add_feature(name)
def vcpus_from_topology(self):
"""
Determine the CPU count represented by topology, or 1 if
no topology is set
"""
self.set_topology_defaults()
if self.sockets:
return self.sockets * self.cores * self.threads
return 1
def set_topology_defaults(self, vcpus=None):
"""
Fill in unset topology values, using the passed vcpus count if
required
"""
if (self.sockets is None and
self.cores is None and
self.threads is None):
return
if vcpus is None:
if self.sockets is None:
self.sockets = 1
if self.threads is None:
self.threads = 1
if self.cores is None:
self.cores = 1
vcpus = int(vcpus or 0)
if not self.sockets:
if not self.cores:
self.sockets = vcpus / self.threads
else:
self.sockets = vcpus / self.cores
if not self.cores:
if not self.threads:
self.cores = vcpus / self.sockets
else:
self.cores = vcpus / (self.sockets * self.threads)
if not self.threads:
self.threads = vcpus / (self.sockets * self.cores)
return
##################
# XML properties #
##################
def _set_model(self, val):
if val:
self.mode = "custom"
if not self.match:
self.match = "exact"
return val
model = XMLProperty(xpath="./cpu/model", set_converter=_set_model)
match = XMLProperty(xpath="./cpu/@match")
vendor = XMLProperty(xpath="./cpu/vendor")
mode = XMLProperty(xpath="./cpu/@mode")
sockets = XMLProperty(xpath="./cpu/topology/@sockets", is_int=True)
cores = XMLProperty(xpath="./cpu/topology/@cores", is_int=True)
threads = XMLProperty(xpath="./cpu/topology/@threads", is_int=True)
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