How do I enable passthrough to a device with virtio-scsi?

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What is passthrough?

Passthrough is a method to allow virtual machines to directly address a physical device on the host machine. This can provide faster access times for some workloads.

virtio-blk already has this, why should I use virtio-scsi?

The virtio-blk driver does allow passthrough already, but with some limitations:

The guest kernel must use the ...

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