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Release of libvirt-6.6.0

The 6.6.0 release of both libvirt and libvirt-python is tagged and
signed tarballs and source RPMs are available at


Thanks everybody who helped with this release by sending patches,
reviewing, testing, or providing any other feedback. Your work is
greatly appreciated.

* New features

  * Allow configuring of ACPI NUMA HMAT

    Libvirt allows configuring ACPI Heterogeneous Memory Attribute Table to
    hint software running inside the guest on optimization.

  * esx: Add a ``type`` attribute for mac addresses.

    This attribute allows (when set to ``static``) ignoring VMWare checks of the
    MAC addresses that would generate a new one if they were in its OUI

  * conf: add control over COW for storage pool directories

    The storage pool code now attempts to disable COW by default on btrfs, but
    management applications may wish to override this behaviour. This is now
    possible via new ``cow`` element.

* Improvements

  * esx: Change the NIC limit for recent virtualHW versions

    Specifying a virtualHW version greater or equal to 7 (ESXi 4.0) will allow
    you to use up to 10 NICs instead of 4 as it was previously.

  * qemu: Support encrypted TLS keys for NBD disks

    The secret key used for disks can now be encrypted similarly to TLS keys
    used for migration, chardev and others.

  * qemu: ``VIR_DOMAIN_EVENT_ID_BLOCK_THRESHOLD`` can now be registered for ``<mirror>``

    The event can now be used also for block copy destinations by using the
    index of the ``<mirror>`` image.

  * qemu: consider available CPUs in ``vcpupin/emulatorpin`` output

    This patch changes the default bitmap of ``vcpupin`` and ``emulatorpin``,
    in the case of domains with static vcpu placement, all available CPUs
    instead of all possible CPUs are returned making these APIs consistent with
    the behavior of ``vcpuinfo``.

* Bug fixes

  * virdevmapper: Don't use libdevmapper to obtain dependencies

    When building domain's private ``/dev`` in a namespace, libdevmapper was
    consulted for getting full dependency tree of domain's disks. However, this
    meant that libdevmapper opened ``/dev/mapper/control`` which wasn't closed
    and was leaked to QEMU. CVE-2020-14339

  * qemu: Report correct ``index`` in ``VIR_DOMAIN_EVENT_ID_BLOCK_THRESHOLD``

    Starting from libvirt 5.10 with QEMU 4.2 the
    ``VIR_DOMAIN_EVENT_ID_BLOCK_THRESHOLD`` event would report incorrect device
    ``index`` when reported for an image from the backing chain of a disk.

  * qemu: Don't fail active layer block commit or block copy in certain cases

    Starting from libvirt-6.5 an active layer block commit or a block copy could
    fail if the same destination was used more than once.

  * qemu: Don't change ownership of restore file

    When restoring a domain from a file, Libvirt no longer changes its ownership.

  * qemu: Set SPAPR TPM default to 2.0 and prevent 1.2 choice

    The firmware (SLOF) on QEMU for ppc64 does not support TPM 1.2, so prevent
    the choice of TPM 1.2 when the SPAPR device model is chosen and use a
    default of '2.0' (TPM 2) for the backend.

  * qemu: Do not set ``//cpu/@migratable`` for running domains

    Libvirt release of 6.4.0 started to fill the default value for
    ``//cpu/@migratable`` attribute according to QEMU support. However, active
    domains either have the migratable attribute already set or they were
    started with older Libvirt which doesn't support the attribute.



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