On Tue, Mar 03, 2020 at 11:42:22AM +0900, David Stevens wrote:

...

cmd_p->hdr.ctx_id =

Before this completion of this hypercall, this resource can be considered context local, while afterward it can be considered "exported".

Maybe I'm misunderstanding render contexts, but exporting a resource doesn't seem related to render contexts.

It isn't indeed. Binding resources to contexts might need dma-buf imports/exports on the host side, but that is another story and not related to dma-buf exports inside the guest.

cheers, Gerd