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05fcc7410e
virt-manager/virtinst/guest.py
Daniel P. Berrangé 05fcc7410e virtinst: fix caching of domain capabilities 
The domain capabilities XML always contains the canonical machine name.
When the selected machine type for a guest is an alias, the check
comparing it to the domain capabilities machine will always fail. This
prevents the domain capabilities result from being cached.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2022-07-27 17:53:14 -04:00

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#
# Common code for all guests
#
# Copyright 2006-2009, 2013, 2014, 2015 Red Hat, Inc.
#
# This work is licensed under the GNU GPLv2 or later.
# See the COPYING file in the top-level directory.
import random
from . import generatename
from . import xmlutil
from .buildconfig import BuildConfig
from .devices import * # pylint: disable=wildcard-import
from .domain import * # pylint: disable=wildcard-import
from .domcapabilities import DomainCapabilities
from .logger import log
from .osdict import OSDB
from .xmlbuilder import XMLBuilder, XMLProperty, XMLChildProperty
_ignore = Device
class _DomainDevices(XMLBuilder):
XML_NAME = "devices"
_XML_PROP_ORDER = ['disk', 'controller', 'filesystem', 'interface',
'smartcard', 'serial', 'parallel', 'console', 'channel',
'input', 'tpm', 'graphics', 'sound', 'audio', 'video', 'hostdev',
'redirdev', 'watchdog', 'memballoon', 'rng', 'panic',
'shmem', 'memory', 'vsock', 'iommu']
disk = XMLChildProperty(DeviceDisk)
controller = XMLChildProperty(DeviceController)
filesystem = XMLChildProperty(DeviceFilesystem)
interface = XMLChildProperty(DeviceInterface)
smartcard = XMLChildProperty(DeviceSmartcard)
serial = XMLChildProperty(DeviceSerial)
parallel = XMLChildProperty(DeviceParallel)
console = XMLChildProperty(DeviceConsole)
channel = XMLChildProperty(DeviceChannel)
input = XMLChildProperty(DeviceInput)
tpm = XMLChildProperty(DeviceTpm)
graphics = XMLChildProperty(DeviceGraphics)
sound = XMLChildProperty(DeviceSound)
audio = XMLChildProperty(DeviceAudio)
video = XMLChildProperty(DeviceVideo)
hostdev = XMLChildProperty(DeviceHostdev)
redirdev = XMLChildProperty(DeviceRedirdev)
watchdog = XMLChildProperty(DeviceWatchdog)
memballoon = XMLChildProperty(DeviceMemballoon)
rng = XMLChildProperty(DeviceRng)
panic = XMLChildProperty(DevicePanic)
shmem = XMLChildProperty(DeviceShMem)
memory = XMLChildProperty(DeviceMemory)
vsock = XMLChildProperty(DeviceVsock)
iommu = XMLChildProperty(DeviceIommu)
def get_all(self):
retlist = []
# pylint: disable=protected-access
devtypes = _DomainDevices._XML_PROP_ORDER
for devtype in devtypes:
retlist.extend(getattr(self, devtype))
return retlist
class _IOThreadID(XMLBuilder):
XML_NAME = "iothread"
_XML_PROP_ORDER = ["id"]
id = XMLProperty("./@id", is_int=True)
class Guest(XMLBuilder):
@staticmethod
def validate_name(conn, name, check_collision=True, validate=True):
if validate:
XMLBuilder.validate_generic_name(_("Guest"), name)
if not check_collision:
return
try:
conn.lookupByName(name)
except Exception:
return
raise ValueError(_("Guest name '%s' is already in use.") % name)
@staticmethod
def generate_uuid(conn):
def _randomUUID():
if conn.fake_conn_predictable():
# Testing hack
return "00000000-1111-2222-3333-444444444444"
u = [random.randint(0, 255) for ignore in range(0, 16)]
u[6] = (u[6] & 0x0F) | (4 << 4)
u[8] = (u[8] & 0x3F) | (2 << 6)
return "-".join(["%02x" * 4, "%02x" * 2, "%02x" * 2, "%02x" * 2,
"%02x" * 6]) % tuple(u)
for ignore in range(256):
uuid = _randomUUID()
if not generatename.check_libvirt_collision(
conn.lookupByUUID, uuid):
return uuid
log.error( # pragma: no cover
"Failed to generate non-conflicting UUID")
@staticmethod
def generate_name(guest):
def _pretty_arch(_a):
if _a == "armv7l":
return "arm"
return _a
force_num = False
basename = guest.osinfo.name
if basename.endswith("-unknown"):
basename = basename.rsplit("-", 1)[0]
if guest.osinfo.name == "generic":
force_num = True
if guest.os.is_container():
basename = "container"
else:
basename = "vm"
if guest.os.arch != guest.conn.caps.host.cpu.arch:
basename += "-%s" % _pretty_arch(guest.os.arch)
force_num = False
def cb(n):
return generatename.check_libvirt_collision(
guest.conn.lookupByName, n)
return generatename.generate_name(basename, cb,
start_num=force_num and 1 or 2, force_num=force_num,
sep=not force_num and "-" or "")
@staticmethod
def get_recommended_machine(capsinfo):
"""
Return the recommended machine type for the passed capsinfo.
We only return this for arch cases where there's a very clear
preference that's different from the default machine type
"""
def _qemu_machine():
if (capsinfo.arch in ["ppc64", "ppc64le"] and
"pseries" in capsinfo.machines):
return "pseries"
if capsinfo.arch in ["armv7l", "aarch64"]:
if "virt" in capsinfo.machines:
return "virt"
if "vexpress-a15" in capsinfo.machines: # pragma: no cover
return "vexpress-a15"
if capsinfo.arch in ["s390x"]:
if "s390-ccw-virtio" in capsinfo.machines:
return "s390-ccw-virtio"
if capsinfo.arch in ["riscv64", "riscv32"]:
if "virt" in capsinfo.machines:
return "virt"
if capsinfo.conn.is_qemu() or capsinfo.conn.is_test():
return _qemu_machine()
return None
#################
# init handling #
#################
XML_NAME = "domain"
_XML_PROP_ORDER = [
"type", "name", "uuid", "genid", "genid_enable",
"title", "description", "_metadata", "iothreads", "iothreadids",
"maxMemory", "maxMemorySlots", "memory", "_currentMemory",
"blkiotune", "memtune", "memoryBacking",
"_vcpus", "vcpu_current", "vcpu_placement",
"vcpu_cpuset", "vcpulist", "numatune", "resource", "sysinfo",
"bootloader", "bootloader_args", "os", "idmap",
"features", "cpu", "clock",
"on_poweroff", "on_reboot", "on_crash",
"pm", "emulator", "devices", "launchSecurity", "seclabels", "keywrap"]
def __init__(self, *args, **kwargs):
XMLBuilder.__init__(self, *args, **kwargs)
# Allow virt-manager to override the default graphics type
self.default_graphics_type = BuildConfig.default_graphics
self.skip_default_console = False
self.skip_default_channel = False
self.skip_default_sound = False
self.skip_default_usbredir = False
self.skip_default_graphics = False
self.skip_default_rng = False
self.skip_default_tpm = False
self.x86_cpu_default = self.cpu.SPECIAL_MODE_APP_DEFAULT
# qemu 6.1, fairly new when we added this option, has an unfortunate
# bug with >= 15 root ports, so we choose 14 instead of our original 16
# https://gitlab.com/qemu-project/qemu/-/issues/641
self.num_pcie_root_ports = 14
self.skip_default_osinfo = False
self.uefi_requested = False
self.__osinfo = None
self._capsinfo = None
self._domcaps = None
self._extra_drivers = None
######################
# Property accessors #
######################
name = XMLProperty("./name")
iothreads = XMLProperty("./iothreads", is_int=True)
iothreadids = XMLChildProperty(_IOThreadID, relative_xpath="./iothreadids")
def _set_currentMemory(self, val):
if val is not None:
val = int(val)
if self.memory is None or self.memory < val:
self.memory = val
self._currentMemory = val
def _get_currentMemory(self):
return self._currentMemory
currentMemory = property(_get_currentMemory, _set_currentMemory)
_currentMemory = XMLProperty("./currentMemory", is_int=True)
memory = XMLProperty("./memory", is_int=True)
maxMemory = XMLProperty("./maxMemory", is_int=True)
maxMemorySlots = XMLProperty("./maxMemory/@slots", is_int=True)
def _set_vcpus(self, val):
if val is not None:
val = int(val)
# Don't force set curvcpus unless already specified
if self.vcpu_current is not None and self.vcpu_current > val:
self.vcpu_current = val
self._vcpus = val
def _get_vcpus(self):
return self._vcpus
_vcpus = XMLProperty("./vcpu", is_int=True)
vcpus = property(_get_vcpus, _set_vcpus)
vcpu_current = XMLProperty("./vcpu/@current", is_int=True)
vcpu_placement = XMLProperty("./vcpu/@placement")
vcpu_cpuset = XMLProperty("./vcpu/@cpuset")
uuid = XMLProperty("./uuid")
genid = XMLProperty("./genid")
genid_enable = XMLProperty("./genid", is_bool=True)
id = XMLProperty("./@id", is_int=True)
type = XMLProperty("./@type")
bootloader = XMLProperty("./bootloader")
bootloader_args = XMLProperty("./bootloader_args")
description = XMLProperty("./description")
title = XMLProperty("./title")
emulator = XMLProperty("./devices/emulator")
on_poweroff = XMLProperty("./on_poweroff")
on_reboot = XMLProperty("./on_reboot")
on_crash = XMLProperty("./on_crash")
on_lockfailure = XMLProperty("./on_lockfailure")
vcpulist = XMLChildProperty(DomainVCPUs, is_single=True)
seclabels = XMLChildProperty(DomainSeclabel)
keywrap = XMLChildProperty(DomainKeyWrap, is_single=True)
os = XMLChildProperty(DomainOs, is_single=True)
features = XMLChildProperty(DomainFeatures, is_single=True)
clock = XMLChildProperty(DomainClock, is_single=True)
cpu = XMLChildProperty(DomainCpu, is_single=True)
cputune = XMLChildProperty(DomainCputune, is_single=True)
numatune = XMLChildProperty(DomainNumatune, is_single=True)
pm = XMLChildProperty(DomainPm, is_single=True)
blkiotune = XMLChildProperty(DomainBlkiotune, is_single=True)
memtune = XMLChildProperty(DomainMemtune, is_single=True)
memoryBacking = XMLChildProperty(DomainMemoryBacking, is_single=True)
idmap = XMLChildProperty(DomainIdmap, is_single=True)
resource = XMLChildProperty(DomainResource, is_single=True)
sysinfo = XMLChildProperty(DomainSysinfo)
launchSecurity = XMLChildProperty(DomainLaunchSecurity, is_single=True)
_metadata = XMLChildProperty(DomainMetadata, is_single=True)
xmlns_qemu = XMLChildProperty(DomainXMLNSQemu, is_single=True)
##############################
# osinfo related definitions #
##############################
def _get_osinfo(self):
if self.__osinfo:
return self.__osinfo
os_id = self._metadata.libosinfo.os_id
if os_id:
self.__osinfo = OSDB.lookup_os_by_full_id(os_id)
if not self.__osinfo:
log.debug("XML had libosinfo os id=%s but we didn't "
"find any libosinfo object matching that", os_id)
if not self.__osinfo:
# If you hit this error, it means some part of the cli
# tried to access osinfo before we can depend on it being
# available. Try moving whatever bits need osinfo to be
# triggered via set_defaults
if self.skip_default_osinfo:
raise xmlutil.DevError(
"osinfo is accessed before it has been set.")
self.set_default_os_name()
return self.__osinfo
osinfo = property(_get_osinfo)
def _set_os_obj(self, obj):
self.__osinfo = obj
self._metadata.libosinfo.os_id = obj.full_id
def set_os_name(self, name):
obj = OSDB.lookup_os(name, raise_error=True)
log.debug("Setting Guest osinfo name %s", obj)
self._set_os_obj(obj)
def set_default_os_name(self):
self.set_os_name("generic")
def _supports_virtio(self, os_support):
if not self.conn.is_qemu():
return False
# These _only_ support virtio so don't check the OS
if (self.os.is_arm_machvirt() or
self.os.is_riscv_virt() or
self.os.is_s390x() or
self.os.is_pseries()):
return True
if not os_support:
return False
if self.os.is_x86():
return True
return False # pragma: no cover
def supports_virtionet(self):
return self._supports_virtio(self.osinfo.supports_virtionet(self._extra_drivers))
def supports_virtiodisk(self):
return self._supports_virtio(self.osinfo.supports_virtiodisk(self._extra_drivers))
def supports_virtioscsi(self):
return self._supports_virtio(self.osinfo.supports_virtioscsi(self._extra_drivers))
def _supports_virtioserial(self):
return self._supports_virtio(self.osinfo.supports_virtioserial(self._extra_drivers))
#####################
# Bootorder helpers #
#####################
def _get_old_boot_order(self):
return self.os.bootorder
def _convert_old_boot_order(self):
"""Converts the old boot order (e.g. <boot dev='hd'/>) into the
per-device boot order format.
"""
boot_order = self._get_old_boot_order()
ret = []
disk = None
cdrom = None
floppy = None
net = None
for d in self.devices.disk:
if not cdrom and d.device == "cdrom":
cdrom = d
if not floppy and d.device == "floppy":
floppy = d
if not disk and d.device not in ["cdrom", "floppy"]:
disk = d
if cdrom and disk and floppy:
break
for n in self.devices.interface:
net = n
break
for b in boot_order:
if b == "network" and net:
ret.append(net.get_xml_id())
elif b == "hd" and disk:
ret.append(disk.get_xml_id())
elif b == "cdrom" and cdrom:
ret.append(cdrom.get_xml_id())
elif b == "fd" and floppy:
ret.append(floppy.get_xml_id())
return ret
def _get_device_boot_order(self):
order = []
for dev in self.get_bootable_devices():
if not dev.boot.order:
continue
order.append((dev.get_xml_id(), dev.boot.order))
if not order:
# No devices individually marked bootable, convert traditional
# boot XML to fine grained
return self._convert_old_boot_order()
order.sort(key=lambda p: p[1])
return [p[0] for p in order]
def get_boot_order(self, legacy=False):
if legacy:
return self._get_old_boot_order()
return self._get_device_boot_order()
def _set_device_boot_order(self, boot_order):
"""Sets the new device boot order for the domain"""
# Unset the traditional boot order
self.os.bootorder = []
# Unset device boot order
for dev in self.devices.get_all():
dev.boot.order = None
dev_map = dict((dev.get_xml_id(), dev) for dev in
self.get_bootable_devices())
for boot_idx, dev_xml_id in enumerate(boot_order, 1):
dev_map[dev_xml_id].boot.order = boot_idx
def set_boot_order(self, boot_order, legacy=False):
"""Modifies the boot order"""
if legacy:
self.os.bootorder = boot_order
else:
self._set_device_boot_order(boot_order)
def reorder_boot_order(self, dev, boot_index):
"""Sets boot order of `dev` to `boot_index`
Sets the boot order for device `dev` to value `boot_index` and
adjusts all other boot indices accordingly. Additionally the
boot order defined in the 'os' node of a domain definition is
disabled since they are mutually exclusive in libvirt.
"""
# unset legacy boot order
self.os.bootorder = []
# Sort the bootable devices by boot order
devs_sorted = sorted([device for device in self.get_bootable_devices()
if device.boot.order is not None],
key=lambda device: device.boot.order)
# set new boot order
dev.boot.order = boot_index
next_boot_index = None
for device in devs_sorted:
if device is dev:
continue
if device.boot.order in [next_boot_index, boot_index]:
next_boot_index = device.boot.order + 1
device.boot.order = next_boot_index
continue
if next_boot_index is not None:
# we found a hole so we can stop here
break
###############################
# Public XML APIs and helpers #
###############################
def add_device(self, dev):
self.devices.add_child(dev)
def remove_device(self, dev):
self.devices.remove_child(dev)
devices = XMLChildProperty(_DomainDevices, is_single=True)
def find_device(self, origdev):
"""
Try to find a child device that matches the content of
the passed @origdev.
"""
devlist = getattr(self.devices, origdev.DEVICE_TYPE)
for idx, dev in enumerate(devlist):
if origdev.compare_device(dev, idx):
return dev
return None
def get_bootable_devices(self, exclude_redirdev=False):
"""
Returns bootable devices of the guest definition. If
@exclude_redirdev is `True` redirected devices will be
skipped in the output.
"""
devices = self.devices
devs = devices.disk + devices.interface + devices.hostdev
if not exclude_redirdev:
devs = devs + devices.redirdev
return devs
def prefers_uefi(self):
"""
Return True if this config prefers UEFI. For example,
arm+machvirt prefers UEFI since it's required for traditional
install methods
"""
if (self.os.is_x86() and
(self.conn.is_qemu() or self.conn.is_test())):
# If OS has dropped support for 'bios', we have no
# choice but to use EFI.
# For other OS still prefer BIOS since it is faster
# and doesn't break QEMU internal snapshots
prefer_efi = self.osinfo.requires_firmware_efi(self.os.arch)
else:
prefer_efi = self.os.is_arm_machvirt() or self.conn.is_bhyve()
log.debug("Prefer EFI => %s", prefer_efi)
return prefer_efi
def is_uefi(self):
if self.os.loader and self.os.loader_type == "pflash":
return True
return self.os.firmware == "efi"
def set_uefi_path(self, path):
"""
Set old style UEFI XML via loader path.
Set up smm if needed for secureboot
"""
self.os.loader_ro = True
self.os.loader_type = "pflash"
self.os.loader = path
# If the firmware name contains "secboot" it is probably build
# with SMM feature required so we need to enable that feature,
# otherwise the firmware may fail to load. True secure boot is
# currently supported only on x86 architecture and with q35 with
# SMM feature enabled so change the machine to q35 as well.
# To actually enforce the secure boot for the guest if Secure Boot
# Mode is configured we need to enable loader secure feature.
if (self.os.is_x86() and
"secboot" in self.os.loader):
self.features.smm = True
self.os.loader_secure = True
if not self.os.is_q35():
log.warning("Changing machine type from '%s' to 'q35' "
"which is required for UEFI secure boot.",
self.os.machine)
self.os.machine = "q35"
def enable_uefi(self):
"""
Enable UEFI using our default logic
"""
domcaps = self.lookup_domcaps()
if domcaps.supports_firmware_efi():
self.os.firmware = "efi"
return
path = self._lookup_default_uefi_path()
log.debug("Setting default UEFI path=%s", path)
self.set_uefi_path(path)
def has_spice(self):
for gfx in self.devices.graphics:
if gfx.type == gfx.TYPE_SPICE:
return True
def has_gl(self):
for gfx in self.devices.graphics:
if gfx.gl:
return True
def has_listen_none(self):
for gfx in self.devices.graphics:
listen = gfx.get_first_listen_type()
if listen and listen == "none":
return True
return False
def is_full_os_container(self):
if not self.os.is_container():
return False
for fs in self.devices.filesystem:
if fs.target == "/":
return True
return False
def can_default_virtioscsi(self):
"""
Return True if the guest supports virtio-scsi, and there's
no other scsi controllers attached to the guest
"""
has_any_scsi = any([d.type == "scsi" for d in self.devices.controller])
return not has_any_scsi and self.supports_virtioscsi()
def hyperv_supported(self):
if not self.osinfo.is_windows():
return False
return True
def lookup_domcaps(self):
def _compare_machine(domcaps):
capsinfo = self.lookup_capsinfo()
if self.os.machine == domcaps.machine:
return True
if capsinfo.is_machine_alias(self.os.machine, domcaps.machine):
return True
return False
# We need to regenerate domcaps cache if any of these values change
def _compare(domcaps): # pragma: no cover
if self.type == "test":
# Test driver doesn't support domcaps. We kinda fake it in
# some cases, but it screws up the checking here for parsed XML
return True
if self.os.machine and not _compare_machine(domcaps):
return False
if self.type and self.type != domcaps.domain:
return False
if self.os.arch and self.os.arch != domcaps.arch:
return False
if self.emulator and self.emulator != domcaps.path:
return False
return True
if not self._domcaps or not _compare(self._domcaps):
self._domcaps = DomainCapabilities.build_from_guest(self)
return self._domcaps
def lookup_capsinfo(self):
# We need to regenerate capsinfo cache if any of these values change
def _compare(capsinfo): # pragma: no cover
if self.type and self.type != capsinfo.hypervisor_type:
return False
if self.os.os_type and self.os.os_type != capsinfo.os_type:
return False
if self.os.arch and self.os.arch != capsinfo.arch:
return False
if self.os.machine and self.os.machine not in capsinfo.machines:
return False
return True
if not self._capsinfo or not _compare(self._capsinfo):
self._capsinfo = self.conn.caps.guest_lookup(
os_type=self.os.os_type,
arch=self.os.arch,
typ=self.type,
machine=self.os.machine)
return self._capsinfo
def set_capabilities_defaults(self, capsinfo=None):
if capsinfo: # pragma: no cover
self._capsinfo = capsinfo
else:
capsinfo = self.lookup_capsinfo()
wants_default_type = not self.type and not self.os.os_type
self.type = capsinfo.hypervisor_type
self.os.os_type = capsinfo.os_type
self.os.arch = capsinfo.arch
if not self.os.loader:
self.os.loader = capsinfo.loader
if (not self.emulator and
not self.os.is_xenpv() and
self.type != "vz"):
self.emulator = capsinfo.emulator
if not self.os.machine:
self.os.machine = Guest.get_recommended_machine(capsinfo)
if (wants_default_type and
self.conn.is_qemu() and
self.os.is_x86() and
self.type != "kvm"):
log.warning( # pragma: no cover
"KVM acceleration not available, using '%s'", self.type)
def refresh_machine_type(self):
"""
Reset the guests's machine type to the latest 'canonical' machine
name that qemu reports. So if my VM is using ancient pc-0.11, we
try to turn that into just `pc`
The algorithm here is to fetch all machine types that are aliases
for a stable name (like pc -> pc-i440fx-6.2), and see if our current
machine type uses alias as a prefix. This is the format that qemu
uses for its stable machine type names.
"""
# We need to unset the machine type first, so we can perform
# a successful capsinfo lookup, otherwise we will error when qemu
# has deprecated and removed the old machine type
original_machine_type = self.os.machine or ""
self.os.machine = None
capsinfo = self.lookup_capsinfo()
mobjs = (capsinfo.domain and
capsinfo.domain.machines) or capsinfo.guest.machines
canonical_names = [m.name for m in mobjs if m.canonical]
for machine_alias in canonical_names:
if machine_alias == "pc":
prefix = "pc-i440fx-"
elif machine_alias == "q35":
prefix = "pc-q35-"
else:
# Example: pseries-X, virt-X, s390-ccw-virtio-X
prefix = machine_alias + "-"
if original_machine_type.startswith(prefix):
self.os.machine = machine_alias
return
raise Exception("Don't know how to refresh machine type '%s'" %
original_machine_type)
def set_smbios_serial_cloudinit(self):
if (not self.conn.is_qemu() and
not self.conn.is_test()):
return # pragma: no cover
if (not self.os.is_x86() and
not self.os.is_arm_machvirt()):
return # pragma: no cover
if self.os.smbios_mode not in [None, "sysinfo"]:
return
sysinfos = [s for s in self.sysinfo if s.type == "smbios"]
if not sysinfos:
sysinfos = [self.sysinfo.add_new()]
sysinfo = sysinfos[0]
if sysinfo.system_serial:
return
self.os.smbios_mode = "sysinfo"
sysinfo.type = "smbios"
sysinfo.system_serial = "ds=nocloud"
def sync_vcpus_topology(self, defCPUs):
"""
<cpu> topology count and <vcpus> always need to match. Handle
the syncing here since we are less constrained then doing it
in CPU set_defaults
"""
if not self.vcpus:
if self.cpu.has_topology():
self.vcpus = self.cpu.vcpus_from_topology()
else:
self.vcpus = defCPUs
self.cpu.set_topology_defaults(self.vcpus)
def set_defaults(self, _guest):
self.set_capabilities_defaults()
if not self.uuid:
self.uuid = Guest.generate_uuid(self.conn)
self.sync_vcpus_topology(1)
self._set_default_machine()
self._set_default_uefi()
self._add_default_graphics()
self._add_default_video_device()
self._add_default_input_device()
self._add_default_console_device()
self._add_default_usb_controller()
self._add_default_channels()
self._add_default_rng()
self._add_default_memballoon()
self._add_default_tpm()
self.clock.set_defaults(self)
self.cpu.set_defaults(self)
self.features.set_defaults(self)
for seclabel in self.seclabels:
seclabel.set_defaults(self)
self.pm.set_defaults(self)
self.os.set_defaults(self)
self.launchSecurity.set_defaults(self)
for dev in self.devices.get_all():
dev.set_defaults(self)
self._add_virtioscsi_controller()
self._add_q35_pcie_controllers()
self._add_spice_devices()
def add_extra_drivers(self, extra_drivers):
self._extra_drivers = extra_drivers
########################
# Private xml routines #
########################
def _set_default_machine(self):
if self.os.machine:
return
capsinfo = self.lookup_capsinfo()
if (self.os.is_x86() and
self.conn.is_qemu() and
"q35" in capsinfo.machines and
self.conn.support.qemu_q35_default() and
self.osinfo.supports_chipset_q35()):
self.os.machine = "q35"
return
default = capsinfo.machines and capsinfo.machines[0] or None
self.os.machine = default
def _lookup_default_uefi_path(self):
"""
If a default UEFI firmware path is found, return it,
otherwise raise an error
"""
domcaps = self.lookup_domcaps()
if not domcaps.supports_uefi_loader():
raise RuntimeError(_("Libvirt version does not support UEFI."))
if not domcaps.arch_can_uefi():
raise RuntimeError( # pragma: no cover
_("Don't know how to setup UEFI for arch '%s'") %
self.os.arch)
path = domcaps.find_uefi_path_for_arch()
if not path: # pragma: no cover
raise RuntimeError(_("Did not find any UEFI binary path for "
"arch '%s'") % self.os.arch)
return path
def _set_default_uefi(self):
use_default_uefi = (self.prefers_uefi() and
not self.os.kernel and
not self.os.loader and
self.os.loader_ro is None and
self.os.nvram is None and
self.os.firmware is None)
if not use_default_uefi and not self.uefi_requested:
return
try:
self.enable_uefi()
except RuntimeError as e:
if self.uefi_requested:
raise
log.debug("Error setting UEFI default", exc_info=True)
log.warning("Couldn't configure UEFI: %s", e)
log.warning("Your VM may not boot successfully.")
def _usb_disabled(self):
controllers = [c for c in self.devices.controller if
c.type == "usb"]
if not controllers:
return False
return all([c.model == "none" for c in controllers])
def _add_default_input_device(self):
if self.os.is_container():
return
if self.devices.input:
return
if not self.devices.graphics:
return
if self._usb_disabled():
return
usb_tablet = False
usb_keyboard = False
if self.os.is_x86() and not self.os.is_xenpv():
usb_tablet = True
if (self.os.is_arm_machvirt() or
self.os.is_riscv_virt() or
self.os.is_pseries()):
usb_tablet = True
usb_keyboard = True
if usb_tablet:
dev = DeviceInput(self.conn)
dev.type = "tablet"
dev.bus = "usb"
self.add_device(dev)
if usb_keyboard:
dev = DeviceInput(self.conn)
dev.type = "keyboard"
dev.bus = "usb"
self.add_device(dev)
# s390x guests need VirtIO input devices
if self.os.is_s390x() and self.osinfo.supports_virtioinput(self._extra_drivers):
dev = DeviceInput(self.conn)
dev.type = "tablet"
dev.bus = "virtio"
self.add_device(dev)
dev = DeviceInput(self.conn)
dev.type = "keyboard"
dev.bus = "virtio"
self.add_device(dev)
def _add_default_console_device(self):
if self.skip_default_console:
return
if self.devices.console or self.devices.serial:
return
dev = DeviceConsole(self.conn)
if self.conn.is_bhyve():
nmdm_dev_prefix = '/dev/nmdm{}'.format(self.generate_uuid(self.conn))
dev.type = dev.TYPE_NMDM
dev.source.master = nmdm_dev_prefix + 'A'
dev.source.slave = nmdm_dev_prefix + 'B'
else:
dev.type = dev.TYPE_PTY
if self.os.is_s390x():
dev.target_type = "sclp"
self.add_device(dev)
def _add_default_video_device(self):
if self.os.is_container():
return
if self.devices.video:
return
if not self.devices.graphics:
return
self.add_device(DeviceVideo(self.conn))
def _add_default_usb_controller(self):
if any([d.type == "usb" for d in self.devices.controller]):
return
if not self.conn.is_qemu() and not self.conn.is_test():
return
qemu_usb3 = self.conn.support.conn_qemu_xhci()
usb2 = False
usb3 = False
if self.os.is_x86():
usb3 = bool(self.osinfo.supports_usb3() and qemu_usb3)
usb2 = not usb3
elif self.os.is_arm_machvirt():
# For machvirt, we always assume OS supports usb3
if (qemu_usb3 and
self.conn.support.conn_machvirt_pci_default()):
usb3 = True
elif self.os.is_riscv_virt():
# For RISC-V we can assume the guest OS supports USB3, but we
# have to make sure libvirt and QEMU are new enough to be using
# PCI by default
if (qemu_usb3 and
self.conn.support.conn_riscv_virt_pci_default()):
usb3 = True
elif self.os.is_pseries():
# For pseries, we always assume OS supports usb3
if qemu_usb3:
usb3 = True
if usb2:
for dev in DeviceController.get_usb2_controllers(self.conn):
self.add_device(dev)
elif usb3:
self.add_device(
DeviceController.get_usb3_controller(self.conn, self))
def _add_default_channels(self):
if self.skip_default_channel:
return
if self.devices.channel:
return
if (self.conn.is_qemu() and
self._supports_virtioserial() and
self.conn.support.conn_autosocket()):
dev = DeviceChannel(self.conn)
dev.type = "unix"
dev.target_type = "virtio"
dev.target_name = dev.CHANNEL_NAME_QEMUGA
self.add_device(dev)
def _add_default_graphics(self):
if self.skip_default_graphics:
return
if self.devices.graphics:
return
if self.os.is_container() and not self.conn.is_vz():
return
if (not self.os.is_x86() and
not self.os.is_pseries()):
return
self.add_device(DeviceGraphics(self.conn))
def _add_default_rng(self):
if self.skip_default_rng:
return
if self.devices.rng:
return
if not (self.os.is_x86() or
self.os.is_arm_machvirt() or
self.os.is_riscv_virt() or
self.os.is_s390x() or
self.os.is_pseries()):
return
if (self.conn.is_qemu() and
self.osinfo.supports_virtiorng(self._extra_drivers) and
self.conn.support.conn_rng_urandom()):
dev = DeviceRng(self.conn)
dev.type = "random"
dev.device = "/dev/urandom"
self.add_device(dev)
def _add_default_tpm(self):
if self.skip_default_tpm:
return
if self.devices.tpm:
return
# If the guest is using UEFI, we take that as a
# flag that the VM is targeting a modern platform
# and thus we should also provide an emulated TPM.
if not self.is_uefi():
return
if not self.lookup_domcaps().supports_tpm_emulator():
log.debug("Domain caps doesn't report TPM support")
return
log.debug("Adding default TPM")
dev = DeviceTpm(self.conn)
dev.type = DeviceTpm.TYPE_EMULATOR
self.add_device(dev)
def _add_default_memballoon(self):
if self.devices.memballoon:
return
if not self.conn.is_qemu():
return
# We know for certain that a memballoon is good to have with these
# machine types; for other machine types, we leave the decision up
# to libvirt
if not (self.os.is_x86() or
self.os.is_arm_machvirt() or
self.os.is_riscv_virt() or
self.os.is_s390x() or
self.os.is_pseries()):
return
if self.osinfo.supports_virtioballoon(self._extra_drivers):
dev = DeviceMemballoon(self.conn)
dev.model = "virtio"
self.add_device(dev)
def _add_virtioscsi_controller(self):
if not self.can_default_virtioscsi():
return
if not any([d for d in self.devices.disk if d.bus == "scsi"]):
return
ctrl = DeviceController(self.conn)
ctrl.type = "scsi"
ctrl.model = "virtio-scsi"
ctrl.set_defaults(self)
self.add_device(ctrl)
def defaults_to_pcie(self):
if self.os.is_q35():
return True
if self.os.is_arm_machvirt():
return True
if self.os.is_riscv_virt():
return True
return False
def _add_q35_pcie_controllers(self):
if any([c for c in self.devices.controller if c.type == "pci"]):
return
if not self.defaults_to_pcie():
return
added = False
log.debug("Using num_pcie_root_ports=%s", self.num_pcie_root_ports)
for dummy in range(max(self.num_pcie_root_ports, 0)):
if not added:
# Libvirt forces pcie-root to come first
ctrl = DeviceController(self.conn)
ctrl.type = "pci"
ctrl.model = "pcie-root"
ctrl.set_defaults(self)
self.add_device(ctrl)
added = True
ctrl = DeviceController(self.conn)
ctrl.type = "pci"
ctrl.model = "pcie-root-port"
ctrl.set_defaults(self)
self.add_device(ctrl)
def _add_spice_channels(self):
if self.skip_default_channel:
return
for chn in self.devices.channel:
if chn.type == chn.TYPE_SPICEVMC:
return
# We explicitly don't check for virtioserial support here.
# We did that for a while, which excluded windows, and
# we received some complaints.
# https://bugzilla.redhat.com/show_bug.cgi?id=1660123
dev = DeviceChannel(self.conn)
dev.type = DeviceChannel.TYPE_SPICEVMC
dev.set_defaults(self)
self.add_device(dev)
def _add_spice_sound(self):
if self.skip_default_sound:
return
if self.devices.sound:
return
if not self.os.is_hvm():
return # pragma: no cover
dev = DeviceSound(self.conn)
dev.set_defaults(self)
self.add_device(dev)
def _add_spice_usbredir(self):
if self.skip_default_usbredir:
return
if self.devices.redirdev:
return
if self._usb_disabled():
return
if not self.os.is_x86():
return
# If we use 4 devices here, we fill up all the emulated USB2 slots,
# and directly assigned devices are forced to fall back to USB1
# https://bugzilla.redhat.com/show_bug.cgi?id=1135488
for ignore in range(2):
dev = DeviceRedirdev(self.conn)
dev.bus = "usb"
dev.type = "spicevmc"
dev.set_defaults(self)
self.add_device(dev)
def _add_spice_devices(self):
if not self.has_spice():
return
if (self.features.vmport is None and
self.os.is_x86() and
self.conn.support.conn_vmport()):
self.features.vmport = False
self._add_spice_channels()
self._add_spice_sound()
self._add_spice_usbredir()
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