There's small_vram_rebar on current master which allows it on 8GB GPUs (but not 6).
As long as we don't have a way to dynamically page out HVV allocations that also works on all drivers, it's going to be a bit janky.
VKD3D_CONFIG=no_upload_hvv,x1 2024-08
Since 2.13 I see that Rebar is disabled for 8GB and less cards. Previously there was a env var to disable rebar - VKD3D_CONFIG=no_upload_hvv, will there be one to override and enable it?