VM failed to run with mdev_type instance in RHV 4.4

Solution Unverified - Updated -

Issue

  • VM failed to run after adding Nvidia vGPU instance using below steps:
    Login to RHV portal -> click on VM name -> host devices tab -> manage vGPU, select Nvidia instane and click "save" button.
    with error in vdsm.log:
The vm start process failed (vm:871) 
...
libvirt.libvirtError: internal error: Process exited prior to exec: libvirt:  error : failed to access '/sys/bus/mdev/devices/e1f27070-b062-4ea3-a689-89e37a56f677/iommu_group': No such file or directory

Environment

  • Red Hat Virtualization 4.3, 4.4
  • RHEL7.8 host NVidia GRID 10.2 GA driver(Tesla M60)
    -- NVIDIA-vGPU-rhel-7.8-440.87.x86_64
  • RHEL 8.2 host NVidia host drivers (Tesla M60):
    -- NVIDIA-vGPU-rhel-8.2-450.36.01.x86_64

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