Yep. That’s why I kind of copped out with just mentioning that the device has to either be in the same coherency domain, or there must be some super vague hand-

Yep. That’s why I kind of copped out with just mentioning that the device has to either be in the same coherency domain, or there must be some super vague hand-wavy “contraption” to achieve coherency. Be creative I guess! :P