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RHEL-9.3.0 will come with qemu 8.0.0 that already includes the fix.

commit 09adb0e021207b60a0c51a68939b4539d98d3ef3
Author: Jason Wang <jasowang>
Date:   Thu Feb 23 14:59:21 2023 +0800

    intel-iommu: fail DEVIOTLB_UNMAP without dt mode
    
    Without dt mode, device IOTLB notifier won't work since guest won't
    send device IOTLB invalidation descriptor in this case. Let's fail
    early instead of misbehaving silently.
    
    Reviewed-by: Laurent Vivier <lvivier>
    Tested-by: Laurent Vivier <lvivier>
    Tested-by: Viktor Prutyanov <viktor>
    Buglink: https://bugzilla.redhat.com/2156876
    Signed-off-by: Jason Wang <jasowang>
    Message-Id: <20230223065924.42503-3-jasowang>
    Reviewed-by: Peter Xu <peterx>
    Reviewed-by: Michael S. Tsirkin <mst>
    Signed-off-by: Michael S. Tsirkin <mst>