[Intel-gfx] [PATCH] drm/i915/tgl: WaDisableGPGPUMidThreadPreemption

[Tvrtko Ursulin]

On 09/03/2020 17:02, Mrozek, Michal wrote:
>>> But he asked whether it's possible for Media and OpenCL drivers to also disable mid-thread preemption through the INTERFACE_DESCRIPTOR_DATA, instead of from the >>kernel side, so we could try to experiment with it in the future.
> 
> Interface Descriptor setting only switches the preemption from mid thread to thread group.
> It doesn't allow to disable it completely and there are cases where this is required  (i.e. VME).
> For that we need mmio whitelist.

With "disable it completely" you mean disable preemption completely - go 
lower than thread-group in granularity?

Regards,

Tvrtko