Add capability to allow hot (un)plug of a domain watchdog device
Fix swapped interface statistics and QoS Due to internal implementation, reported statistics for some types of interfaces were swapped (RX appeared in TX and vice versa). Similarly, QoS was set in reversed way.
qemu: Added support for cold-(un)plug of watchdog devices qemu: Added support for setting IP address os usernet interfaces qemu: Added support for Veritas Hyperscale (VxHS) block devices storage: Added new events for pool-build and pool-delete
qemu: Set DAC permissions properly for spice rendernode When a rendernode path is set for SPICE GL on qemu:///system, we now correctly set DAC permissions on the device at VM startup. This is the last remaining hurdle to let SPICE GL work for qemu:///system without any external host changes. nodedev: Add switchdev offload query to NIC capabilities Allow querying the NIC interface capabilities for the availability of switchdev offloading (also known as kernel-forward-plane-offload). New CPU models for AMD and Intel AMD EPYC and Intel Skylake-Server CPU models were added together with their features Improve long waiting when saving a domain While waiting for a write to disk to be finished, e.g. during save, even simple operations like virsh list would be blocking due to domain lock. This is now resolved by unlocking the domain in places where it is not needed.
Proper units are now used in virsh manpage for dom(mem)stats Previously the documentation used multiples of 1000, but now it is fixed to use multiples of 1024. qemu: Fix error reporting when disk attachment fails There was a possibility for the actual error to be overridden or cleared during the rollback. qemu: Fix assignment of graphics ports after daemon restart This could be seen with newer kernels that have bug regarding SO_REUSEADDR. After libvirtd was restarted it could assign already used address to new guests which would make them fail to start. This is fixed by marking used ports unavailable when reconnecting to running QEMU domains. Fix message decoding which was causing a very strange bug When parsing an RPC message with file descriptors was interrupted and had to restart, the offset of the payload was calculated badly causing strange issues like not being able to find a domain that was not requested.
qemu: Add managedsave-edit commands Using managedsave-dumpxml, managedsave-define and managedsave-edit commands, now we can dump and edit the XML configuration of domain which has managedsave image. qemu: Add migrate-getmaxdowntime command Currently, the maximum tolerable downtime for a domain being migrated is write-only from libvirt, via migrate-setmaxdowntime. This implements a complementary migrate-getmaxdowntime command bhyve: Support autoport for VNC ports It's no longer necessary to explicitly specify VNC port for the bhyve guests. With the autoport feature it will be allocated automatically. Please refer to the bhyve driver documentation for examples. qemu: Added support for setting heads of virtio GPU qemu: Added support to configure reconnect timeout for chardev devices When you have a TCP or UNIX chardev device and it's connected somewhere you can configure reconnect timeout if the connection is closed.
qemu: Report a clear error when dropping a VM during startup "Failed to load config for domain 'DOMNAME'" is now reported if a VM config can't be parsed for some reason, and thus provides a clear indication for users (and devs). apparmor: Update for QEMU 2.10 compatibility Starting with QEMU 2.10, disk images and NVRAM files get automatically locked to prevent them from being corrupted; however, file locking needs to be explicitly allowed through virt-aa-helper or AppArmor will reject the requests and the guest will not be able to run. virsh: List Unix sockets in 'domdisplay' output VNC and SPICE graphics can use Unix sockets instead of TCP/IP sockets as connection endpoints, but such a configuration was not handled correctly by virsh domdisplay, causing the respective endpoints to be missing from the output. qemu: Don't check whether offline migration is safe Since offline migration only copies the guest definition to the destination host, data corruption is not a concern and the operation can always be performed safely. virt-host-validate: Fix IOMMU detection on ppc64
qemu: Better support for international domain names (with wide characters) There were some issues with multi-byte domains getting lost on daemon restart due to truncation, so the code now handles multi-byte names a bit better. qemu: Support long domain names with namespaces Domains with extremely long names would fail to start due to temporary namespace paths being created with the whole name. The path is now generated with shortened name instead. qemu: Tolerate missing emulator binary during libvirtd restart For some time libvirt required qemu capabilities being present when parsing VM configs during startup. As a side effect VM configs would fail to parse and thus vanish, if the emulator binary would be uninstalled or broken. Libvirt now tolerates when capabilities are missing during startup. qemu: Prevent pSeries guests from disappearing in some situations pSeries guest would disappear if any of the host devices they were configured to use was not available during libvirtd startup, which could easily happen for SR-IOV Virtual Functions. This scenario is now handled correctly. qemu: Honor <on_reboot/> setting The setting was accepted by the parser, but not actually implemented. Fix --verbose option for all daemons Since v3.0.0, the option had been ignored by all libvirt daemons (libvirtd, virtlogd and virtlockd); it's now working as intended once again.
hyperv: Implement virDomainSetMemory and virDomainSendKey APIs qemu: Support multiple PHBs for pSeries guests pSeries guests can now have multiple PHBs (PCI Host Bridges), which show up as separate PCI domains in the guest. To create additional PHBs, simply add PCI controllers with model pci-root to the guest configuration. qemu: Isolate hostdevs on pSeries guests To enable better error reporting and recovery, unrelated hostdevs will now be automatically isolated on pSeries guests by placing them on separate PHBs (PCI Host Bridges).
qemu: platform serial devices can now use chardev features QEMU VMs that depend on platform serial devices can now use QEMU's -chardev option, which enables access to advanced features like log file configuration. This applies to the default serial devices for arm, aarch64, and some ppc configurations. Require use of GCC 4.4 or Clang compilers We only ever test libvirt with GCC or Clang (which provides a GCC compatible compilation environment). Between them, these compilers cover every supported operating system platform, including Windows. qemu: shared disks with directsync cache should be safe for migration At present shared disks can be migrated with either readonly or cache=none. But cache=directsync should be safe for migration, because both cache=directsync and cache=none don't use the host page cache, and cache=direct write through qemu block layer cache. Handle hotplug change on VLAN configuration using OVS Libvirt was taught to handle VLAN change for running OVS interface.
qemu: Use vCPU 'node-id' property and pass it back to qemu vCPU properties gathered from query-hotpluggable-cpus need to be passed back to QEMU. As QEMU did not use the node-id property until now and libvirt forgot to pass it back properly (it was parsed but not passed around) we did not honor this. Miscellaneous stream fixes After introducing sparse stream features there were still some known bugs left. Those are fixed in this release. qemu: Miscellaneous domain NS fixes Libvirt starts qemu domains in separate Linux namespaces for a while now. However, there were still some bugs lingering. For instance libvirt did not know how to handle file based bind mounts. Various CPU driver improvements There were some minor bugs when using 'host-model' CPU.
qemu: Add support for loadparm for a boot device Add an optional boot parameter 'loadparm' for a boot device. Loadparm is an 8 byte parameter that, when present, is queried by S390 guests via sclp or diag 308. Linux guests on S390 use it to select a boot entry. Support controlling how video devices are exposed to the bhyve guests The vgaconf attribute was added to video's driver element. Possible values are: on, off, and io. It controlls the way how bhyve exposes video devices to its guests; various guest OSes might require different settings to boot properly. qemu: Add support for live updates of coalesce settings Users can now use virsh update-device to change the coalesce settings of an interfaces while the domain is running. qemu: Allow VirtIO devices to use vIOMMU It is now possible to turn on IOTBL for the vIOMMU and have VirtIO devices use it, provided they have been configured appropriately.
qemu: block copy job can be used with persistent domains Until now it was not possible to use block copy with persistent VMs. In use cases where it's not required to recover the job after VM shutdown, it's possible to specify VIR_DOMAIN_BLOCK_COPY_TRANSIENT_JOB flag to start the copy job. JSON pseudo-protocol backing store parser supports new format of qemu 2.9 QEMU 2.9 modified a few structures corresponding to the JSON format of specifying a backing store for a disk image. Libvirt now implements the new format. Capabilities now include info about host's CAT settings Various information about resource control from the host is gathered and presented in capabilities if available. apparmor: Several improvements Allow access to Ceph config, EFI firmware on both x86_64 and aarch64, device tree on ppc64 and more. qemu: Support host-model on POWER9 machines
qemu: snapshot: retrieve image metadata from user provided files Disk images of an external snapshot created with VIR_DOMAIN_SNAPSHOT_CREATE_REUSE_EXT flag specified would not be scanned for metadata after recent changes. The metadata is necessary to allow keeping relative paths between images when doing a block-commit. Parse decimal numbers in a locale-independent way Some locales, such as de_DE and pt_BR, use comma rather than dot to separate the integer part from the fractional part of a decimal number; however, several data sources such as the kernel use a locale-independent representation and need to be treated accordingly. Support compilation with newer compiler and libc versions Several fixes have been included to make compilation with Clang 4.0.0, GCC 7.1 and glibc >= 2.25.90 possible. qemu: Query name for vhost-user interfaces at runtime This makes it possible to use virsh subcommands such as domiflist and domifstat on vhost-user interfaces. qemu: Set MTU for hotplugged interfaces correctly When hotplugging a network interface, the MTU was only set on the guest side. Set it on the host side as well. qemu: Forbid updating MTU for interfaces of running guests The MTU setting can't be modified while the guest is running, so any attempt to alter it at runtime will now result in an error rather than being silently ignored. qemu: Fix specifying QXL heads with older QEMU releases Specifying the number of QXL heads was not working correctly for QEMU releases older than 1.6. qemu: Fix migration to older libvirt/QEMU versions When the guest is started, libvirt updates the CPU definition to reflect the actual CPU features to enforce ABI. We need to send original and updated CPU definition in order to support migration to older libvirt/QEMU versions. Only the updated CPU definition was sent to destination.
Improved streams to efficiently transfer sparseness New extension to virStream was implemented so that virStorageVolDownload and virStorageVolUpload can preserve file sparseness. I/O APIC type can be specified for QEMU/KVM domains The ioapic tag was added to domain features, so the type of the I/O APIC can now be specified (e.g. putting it in userspace for KVM domains). The reason for VM shutdown is reported, if known QEMU 2.10 will be able to report the reason for shutting down (whether that was caused by the guest or not), and libvirt is prepared for that and reports that information in its shutdown event as well, if it is known.
Repository now has new README.md file The new file uses markdown syntax, so it looks better on github and possibly other web pages, but it has also more useful information. The old README is now symlink to the new file. qemu: Use GICv2 by default for aarch64/virt TCG guests The emulated GICv3 has some limitations that make it unusable as a default; use GICv2 until they're sorted out. This change makes it once again possible to run aarch64/virt guests on a x86_64 host without having to tweak their configuration. Additional capabilities for the node_device module Introduce two new capabilities to the node_device module. The first is for CCW devices, most common on the S390 architecture. The second is for fibre channel-backed SCSI devices and exposes the fc_remote_port sub-capability to SCSI target devices. Node devices now report Mediated device capabilities Endpoint devices support new mdev capability and their parents now report the supported types in new mdev_types capability. Capabilities now report information about host caches If supported in the kernel, host capabilities will now list L3 caches. The code for other levels was added as well, but only L3 caches are reported currently. POWER9 CPU model was added It is now properly reported in host capabilities. libxl: NUMA sibling distances are now reported in host capabilities VMDK version 3 files are now properly detected Interrupt remapping and Extended interrupt mode for IOMMU devices These two new features can now be controlled with new <driver intremap='on/off' eim='on/off'/> tag for iommu devices. Graphics in libxl domains now have default addresses Even though there were default addresses before this change, they were not saved in the XML. It is now possible to see and control the listen addresses properly. Default USB controllers are now added for devices in libxl domains Even though they were added automatically when USB device was attached, they could've been missing in some other cases. The logic is now fixed so there are always USB controllers, even if there was none of them in the specified XML. Limits for RPC messages were increased Hitting the RPC limits we have is easier every day, so they were increased once again and some guessing logic was improved as well. It is now possible to get more stats than ever using the virConnectGetAllDomainStats() call and push through even bigger requests and replies for all APIs.
qemu: Create memory_backing_dir on startup Libvirt's policy is that directories are created on startup if they don't exist. We've missed this one. PCIe 4.0 cards now report proper link speeds It could happen that the link speed for PCIe devices was not properly reported or the nodedev-dumpxml just failed. That was due to mistake in the field width, but should now work properly. qemu: Do not report errors on shutdown For some users, in some rare cases, it could happen that there was an error message "internal error: End of file from qemu monitor" in the logs even though no problem happened. The detection of these false positives was improved and such errors should not show any more. User-specified UNIX socket paths for virtio channels should not be reset It could happen, in some cases, that libvirt would mistake a user-specified path for its own generated one and thus remove it from the XML. The detection of such addresses was improved now. Fix address reservation during RNG hot-plug When error occurred in a specific point in time during the hot-plug of an RNG device, it could happen that an address was released even though another device was already using it, making it possible to hot-plug another device with that address, effectively having duplicated addresses in the XML.
net: Add support for coalesce settings Enabling data batching through these settings can improve network performance for guests. qemu: Add support for guest CPU cache specification This features allows fine-grained control of the cache behavior of the guest CPU. qemu: Add support for the qemu-xhci USB controller
hyperv: Support Hyper-V 2012 and newer Starting with Hyper-V 2012 the API has changed causing the existing driver to be unable to send and process requests properly. This has been resolved by adding abstractions to handle the differences and ease handling such breaks if they happen in the future. libxl: Add support for nested HVM domains Xen has supported nested HVM domains since version 4.4. The libvirt libxl driver now supports nested HVM domains by specifying the host-passthrough CPU mode when defining a domain. qemu: Implement ACPI support for aarch64 guests Up until this point, ACPI support was only advertised for x86_64 guests and disabling it for aarch64 guests was not possible at all. vz: Add support for changing the number of vCPUs qemu: Automatically choose the best USB controller for guests The recently introduced qemu-xhci USB controller is the best choice for both ppc64 and aarch64 guests, so use it by default on those architectures if available. daemon: Increase default task limit for libvirtd The default number of tasks for the pids cgroup controller is 512, which libvirtd can quickly bump into when starting lots of guests. Raise the limit to a more reasonable 32768. docs: Include man pages describing key code names and values virsh: Report initialization errors Sometimes virsh might be unable to start: when that happens, report useful diagnostics instead of failing silently.
nss: Don't require a network restart for libvirt_guest Previously, the libvirt_guest NSS module would only work properly after the corresponding network had been restarted; now newly started guests will be reported correctly right away. storage: Remove unavailable transient pools after restart Solve an issue where transient storage pools would be stuck in an unmanageable state if the source disappeared and libvirtd was subsequently restarted. storage: Fix capacity value for LUKS encrypted volumes The 'capacity' value (e.g. guest logical size) for a LUKS volume is smaller than the 'physical' value of the file in the file system, so we need to account for that. qemu: Fix regression when hyperv/vendor_id feature is used Guests using the feature would not be started at all; it is now possible to start them as expected. qemu: Do not crash on USB address with no port and invalid bus crypto: Always pad data before encrypting it If this step is not performed, when the data length matches the chunk size the decryption routines will misinterpret the last byte of data as the padding length and fail to decode it correctly.
The virt-host-validate tool now supports bhyve hypervisor Introduce NVDIMM memory model NVDIMM is new type of memory introduced into QEMU 2.6. The idea is that we have a non-volatile memory module that keeps the data persistent across domain reboots and offers much faster data accesses. However, due to a bug in QEMU, this feature is not enabled for QEMUs older than 2.9.0. qemu: Introduce support for generic PCIe Root Ports For new controllers, a generic device (pcie-root-port) will be used by default instead of the Intel-specific device (ioh3420), provided the QEMU binary supports it. qemu: Add support for checking guest CPU ABI compatibility When migrating a domain to a different host, restoring a domain from a file or reverting a snapshot libvirt will make sure the guest CPU QEMU presents to the guest OS exactly matches the one provided on the source host (or before the domain's state was saved). This enhanced check may also be requested when starting a new domain to ensure the virtual CPU exactly matches the one specified in the XML. qemu: Add support to migrate using TLS Add the ability to migrate QEMU guests using TLS via a new flag VIR_MIGRATE_TLS or virsh migrate '--tls' option. Requires using at least QEMU 2.9.0 in order to work properly. qemu: add mediated devices framework support Recent kernel version introduced new mediated device framework, so provide an initial support of this framework for libvirt, mainly by introducing a new host device type in the XML. qemu: Add support for setting TSC frequency Setting TSC frequency is required to enable migration for domains with 'invtsc' CPU feature turned on. Add support for block device threshold event When using thin provisioning, management tools need to resize the disk in certain cases. To avoid having them to poll disk usage this version introduces an event which will be fired when a given offset of the storage is written by the hypervisor. Together with the API it allows registering thresholds for given storage backing volumes and this event will then notify management if the threshold is exceeded. Currently only the qemu driver supports this. bhyve: Add support for UEFI boot ROM, VNC, and USB tablet The bhyve driver now supports booting using the UEFI boot ROM, so non-FreeBSD guests that support UEFI could be booted without using an external boot loader like grub-bhyve. Video is also supported now, allowing to connect to guests via VNC and use an USB tablet as an input device. Please refer to the driver page for domain XML examples.
qemu: Detect host CPU model by asking QEMU on x86_64 Previously, libvirt detected the host CPU model using CPUID instruction, which caused libvirt to detect a lot of CPU features that are not supported by QEMU/KVM. Asking QEMU makes sure we don't start it with unsupported features. perf: Add more perf statistics Add support to get the count of cpu clock time, task clock time, page faults, context switches, cpu migrations, minor page faults, major page faults, alignment faults, emulation faults by applications running on the platform. Write hyperv crash information into vm log qemu's implementation of the hyperv panic notifier now reports information about the crash from the guest os. Starting with this version, libvirt logs the information to the vm log file for possible debugging.
QEMU: Use adaptive timeout for connecting to monitor When starting qemu, libvirt waits for qemu to create the monitor socket which libvirt connects to. Historically, there was sharp 30 second timeout after which the qemu process was killed. This approach is suboptimal as in some scenarios with huge amounts of guest RAM it can take a minute or more for kernel to allocate and zero out pages for qemu. The timeout is now flexible and computed by libvirt at domain startup. Overwrite (clear) 2 KB instead of just 512 bytes when initializing logical device Describe the logical backend requirements better for pool-create-as
storage: Add Virtuozzo storage backend storage pool Add new storage backend to support pool and volume management within the Virtuozzo Storage environment. Virtuozzo Storage is a highly available distributed software defined storage with built-in replication and disaster recovery. qemu: Add support for memory backing with file source Add support in numa topology for file source inside memory backing (hugepages are not needed) Three new elements <source/>,<access/> and <allocation/> were added to <memoryBacking/> element. Also new configuration parameter memory_backing_dir was added to qemu.conf. network: make openvswitch call timeout configurable Adding the ability to specify the timeout value in seconds for openvswitch calls in the libvirtd configuration file. bhyve: add e1000 NIC support Add support for e1000 NIC. Previously, the only available option was virtio-net. libxl: add tunneled migration support Add tunneled migration to libxl driver, which is always capable of strong encryption and doesn't require any extra network connection other than what's required for remote access of libvirtd. qemu: add rendernode argument Add a new attribute 'rendernode' to <gl> spice element. nodedev: add drm capability Add a new 'drm' capability for Direct Rendering Manager (DRM) devices, providing device type information. Add API for individual/specific vCPU hotplug The new API allows selecting specific vCPUs to be added/removed from the VM. The existing APIs allowed only adding/removing from the end which did not play well with NUMA.
virsh: pool-list: allow both --uuid and --name in one command Adjust the virsh-pool command to support the --uuid and/or --name options in order to print just the --name and/or --uuid of pools. Introduce MTU to domain <interface/> and <network> Allow setting MTU size for some types of domain interface and network. libxl: improve support for <timer> configurations Add support for multiple timers. Extend the tsc timer to support the emulate mode. Improve conversion of timer XML to/from xl.cfg. storage: modularize the storage driver Split up the storage driver backends into loadable modules so that binary distributions don't have to compromise on shipping the storage driver with all backends which may pull in too many dependencies.
nodedev: Fabric name must not be required for fc_host capability fabric_name is one of many fc_host attributes in Linux that is optional and left to the low-level driver to decide if it is implemented. For example the zfcp device driver does not provide a fabric name for an fcp host. The requirement for the existence of a fabric name has been removed by making it optional. bhyve: change address allocation schema for SATA disks Previously, the bhyve driver assigned PCI addresses to SATA disks directly rather than assigning that to a controller and using SATA addresses for disks. It was implemented this way because bhyve has no notion of an explicit SATA controller. However, as this doesn't match libvirt's understanding of disk addresses, the bhyve driver was changed to follow the common schema and have PCI addresses for SATA controllers and SATA addresses for disks. If you're having issues because of this, it's recommended to edit the domain's XML and remove <address type='pci'> from the <disk> elements with <target bus='sata'/> and let libvirt regenerate it properly. libxl: maximum memory fixes Fix reporting of domain maximum memory. Fix setting dom0 maximum memory. libxl: fix disk detach when <driver> not specified libxl: fix dom0 autoballooning with Xen 4.8 qemu: Allow empty script path to <interface/> Historically, this was always allowed. Unfortunately, due to some rework done for 1.3.2 release a bug was dragged in which suddenly stop allowing domain with such configuration to start.
Domain events for metadata content changes The domain events framework has a new event ID that can be used to get notifications when domain metadata content changes. Event notifications for the secret object The secret object now supports event notifications, covering lifcycle changes and secret value changes. New localPtr attribute for "ip" element in network XML qemu: Support QEMU group I/O throttling Add the capability to allow group I/O throttling via a new domain <disk> <iotune> subelement "group_name" to allow sharing I/O throttling quota between multiple drives. nss: Introduce libvirt_guest New libvirt_guest nss module that translates libvirt guest names into IP addresses. daemon: Add support for runtime logging settings adjustment Logging-related settings like log outputs and filters can now be adjusted during runtime using the admin interface without the necessity of the daemon's restart. storage: Add virStorageVolInfoFlags API Add the API to support using the VIR_STORAGE_VOL_GET_PHYSICAL flag in order to return the host physical size in bytes of the image container in the allocation field of the _virStorageVolInfo structure. The --physical flag has been added to the virsh vol-info command to access the data. libxl: Implement virDomainGetMaxVcpus API storage: Add overwrite flag checking for logical pool Add support for the OVERWRITE flags for the logical storage backend including checking for existing data on the target volumes when building a new logical pool on target volume(s). qemu: Add support for guest CPU configuration on s390(x)
perf: Add more perf statistics Add support to get the count of branch instructions executed, branch misses, bus cycles, stalled frontend cpu cycles, stalled backend cpu cycles, and ref cpu cycles by applications running on the platform. conf: Display <physical> for volume xml Add a display of the <physical> size of a disk volume in the output of the volume XML. qemu: Use virtio-pci by default for aarch64 mach-virt guests virtio-pci provides several advantages over virtio-mmio, such as the ability to hotplug devices and improved performance. While opting in to virtio-pci has been possible for a while, newly-defined guests will now use it automatically. vbox: remove support for VirtualBox 3.x and older Those old VirtualBox versions have been unsupported by upstream for a long time and the API of 4.0 and newer has diverged enough to require code abstractions to handle differences. Removing support for those old versions drops lots of code from the driver and simplifies the logic to ease implementation of new features going forward. virsh: pool-info: introduce option --bytes Add option --bytes to virsh pool-info in order ti allow display of units in bytes rather than default of human readable output. scsi: Add parent wwnn/wwpn or fabric capability for createVport Improve the algorithm searching for the parent scsi_host device for vHBA/NPIV scsi_host creation. Rather than supplying the "parent" by name, it's now possible to define the parent by it's wwnn/wwpn or fabric_wwn in the node device create XML or the storage pool XML. qemu: aggregate pcie-root-ports onto multiple functions of a slot When pcie-root-ports are added to pcie-root in order to provide a place to connect PCI Express endpoint devices, libvirt now aggregates multiple root ports together onto the same slot (up to 8 per slot) in order to conserve slots. Using this method, it's possible to connect more than 200 endpoint devices to a guest that uses PCIe without requiring setup of any PCIe switches.
lxc: fix accidental killing of containers during libvirtd restart The libvirt_lxc process was previously not moved into the container scope. As a result, if systemd reloads its config after a container is started, when libvirtd is later restarted it will accidentally kill the containers. qemu: Correct GetBlockInfo values For an active domain, correct the physical value provided for a raw sparse file backed storage and the allocation value provided for a qcow2 file backed storage that hasn't yet been opened on the domain. qemu: Make virtio console usable on ppc64 guests The chardev detection code has been improved and can now handle this configuration properly. qemu: Enable mount namespace To avoid funny races with udev relabelling devices under our hands and to enhance security, libvirt now spawns each qemu process with its own /dev. storage: Fix implementation of no-overwrite for file system backend Fix file system storage backend implementation of the OVERWRITE flags to be consistent between code and documentation. Add checks to ensure that when building a new file system on a target volume that there is not something already on the disk in a format that libvirt can recognize. qemu: Create hugepage path on per domain basis Historically, all hugepage enabled domains shared the same path under hugetlbfs. This left libvirt unable to correctly set security labels on it. With this release, however, each domain is put into a separate path which is also correctly labeled. conf: Reject domains with duplicate drive addresses Reject duplicate drive addresses for disks and hostdevs at domain definition. libxl: reverse defaults on HVM net device attach Fixes network interface attach for HVM domains when no model is specified. Emulated hotplug isn't yet supported and hence we should default to the general working scenario. libxl: always enable pae for x86_64 HVM By default pae is disabled in libxl. Without an explicit <pae/> setting in the domain <features> configuration, an x86_64 HVM domain would be get an i686 environment. pae should always be enabled for x86_64 HVM domains. qemu: Fix XML dump of autogenerated websocket As a result autogenerated websocket port is regenerated on domain restore, migration and such as it should be.
shmem: Add support for additional models The shmem device can now utilize QEMU's ivshmem-plain and ivshmem-doorbell, more modern versions of ivshmem. vbox: Add VirtualBox 5.1 support libssh: New transport The new libssh transport allows one to connect to a running libvirtd via SSH, using the libssh library; for example: qemu+libssh://server/system. vhost-scsi: Add support scsi_host hostdev passthrough Add the capability to pass through a scsi_host HBA and the associated LUNs to the guest. Allow debugging of gluster volumes in qemu Users can now enable debug logging for native gluster volumes in qemu using the "gluster_debug_level" option in qemu.conf Pre-allocate memory slots for memory hotplug Slot numbers for memory devices are now automatically allocated and thus persistent. In addition slot numbers can be specified without providing a base address, which simplifies user configuration qemu: Express devices will be placed on PCIe bus by default For machine types that use a PCI Express root bus (e.g. x86_64/Q35 and aarch64/virt), any unaddressed PCI device that is an Express device (all virtio-1.0 devices, e1000e, nec-xhci, vfio assigned devices) will be placed on an Express controller (i.e. a pcie-root-port) instead of a legacy PCI controller (i.e. pci-bridge) with the root ports added as needed.
docs: Better documentation for migration APIs and flags vbox: Address thread safety issues virsh: Add support for passing an alternative persistent XML to migrate command vhostuser: Allow hotplug of multiqueue devices NEWS: Switch to an improved format List user-visible changes instead of single commits for a better high-level overview of differences between libvirt releases. website: Modernize layout and branding The libvirt website looked very cluttered and outdated; it has now been completely overhauled, resulting in a design that's better organized and more pleasant to look at.
vz: Fix migration in P2P mode Forbid newline character in names of some libvirt objects Fix compilation on macOS