Comment 8 for bug 1863728

Reviewed: https://review.opendev.org/c/openstack/nova/+/822053
Committed: https://opendev.org/openstack/nova/commit/31ff7ce7e21fc7c654ab7b4187774fec5be371ca
Submitter: "Zuul (22348)"
Branch: master

commit 31ff7ce7e21fc7c654ab7b4187774fec5be371ca
Author: Jonathan Race <email address hidden>
Date: Thu Dec 16 17:17:42 2021 -0500

    driver/secheduler/docs for Adds Pick guest CPU architecture based on
    host arch in libvirt driver support

    This is split 2 of 3 for the architecture emulation feature.

    This implements emulated multi-architecture support through qemu
    within OpenStack Nova.

    Additional config variable check to pull host architecture into
    hw_architecture field for emulation checks to be made.

    Adds a custom function that simply performs a check for
    hw_emulation_architecture field being set, allowing for core code to
    function as normal while enabling a simple check to enable emulated
    architectures to follow the same path as all multi-arch support
    already established for physical nodes but instead levaraging qemu
    which allows for the overall emulation.

    Added check for domain xml unit test to strip arch from the os tag,
    as it is not required uefi checks, and only leveraged for emulation
    checks.

    Added additional test cases test_driver validating emulation
    functionality with checking hw_emulation_architecture against the
    os_arch/hw_architecture field. Added required os-traits and settings
    for scheduler request_filter.

    Added RISCV64 to architecture enum for better support in driver.

    Implements: blueprint pick-guest-arch-based-on-host-arch-in-libvirt-driver
    Closes-Bug: 1863728
    Change-Id: Ia070a29186c6123cf51e1b17373c2dc69676ae7c
    Signed-off-by: Jonathan Race <email address hidden>