Comment 4 for bug 1869006

Hotplug to VM with 3055MB of memory ends same way:

internal error: błąd podczas wykonać polecenia QEMU „device_add”: vfio 0000:28:00.0: failed to setup container for group 27: memory listener initialization failed: Region mach-virt.ram: vfio_dma_map(0x55c1aca5c5c0, 0x40000000, 0xbef00000, 0x7f3549000000) = -22 (Invalid argument)

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/addhardware.py", line 1327, in _add_device
    self.vm.attach_device(dev)
  File "/usr/share/virt-manager/virtManager/object/domain.py", line 920, in attach_device
    self._backend.attachDevice(devxml)
  File "/usr/lib64/python3.8/site-packages/libvirt.py", line 606, in attachDevice
    if ret == -1: raise libvirtError ('virDomainAttachDevice() failed', dom=self)
libvirt.libvirtError: internal error: błąd podczas wykonać polecenia QEMU „device_add”: vfio 0000:28:00.0: failed to setup container for group 27: memory listener initialization failed: Region mach-virt.ram: vfio_dma_map(0x55c1aca5c5c0, 0x40000000, 0xbef00000, 0x7f3549000000) = -22 (Invalid argument)