block dangerous passthrough operation

[Christoph Hellwig]

On Thu, Nov 17, 2022 at 08:43:36AM +0530, Kanchan Joshi wrote:
> But if there are people using the upstream driver for testing
> nvme-hardware, restricting may not go well. Stuff like creating SQ/CQ
> in early stages of new SSD/controller development may just be
> the thing they want to test.

How would that actually work?  If you want to play with low-level
details of the controller you better have something like a vfio
driver that is entirely in control.