Public bug reported:

I am trying QEMU on Raspberry Pi 4 B 4GB and is encountering an issue
trying to start a VM using machine type raspi3b.

OS: Ubuntu 21.04, 5.11.0-1007-raspi

Sample libvirt domain xml (tried to be minimal)
<domain type='kvm'>
  <name>raspi3b</name>
  <memory unit='KiB'>1048576</memory>
  <currentMemory unit='KiB'>1048576</currentMemory>
  <vcpu placement='static'>4</vcpu>
  <os>
    <type arch='aarch64' machine='raspi3b'>hvm</type>
  </os>
  <cpu mode='host-passthrough' check='none'/>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/bin/qemu-system-aarch64</emulator>
    <controller type='usb' index='0' model='qemu-xhci'/>
  </devices>
</domain>

Error: qemu-system-aarch64: Property 'raspi3b-machine.acpi' not found

It seems that libvirt will put "-no-acpi" to the qemu starting command
it creates, and that caused the error above.  If I try to mimic the
start VM command w/o this, VM seems to be running (but I am no expert to
really test it out)

May the maintainer help validate whether it is the real cause and have a
fix for it (and other QEMU machine types that do not support ACPI
anyway)?  Or, should it be a bug be filed for QEMU instead?

** Affects: libvirt (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1936831

Title:
  libvirt ACPI on unsupported machine

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