[PATCH] powerpc/powernv: Add support for NPU2 relaxed-ordering mode

[Michael Ellerman]

Reza Arbab <arbab at linux.ibm.com> writes:
> From: Alistair Popple <alistair at popple.id.au>
>
> Some device drivers support out of order access to GPU memory. This does
> not affect the CPU view of memory but it does affect the GPU view, so it
> should only be enabled once the GPU driver has requested it. Add APIs
> allowing a driver to do so.

Do we have any indication which drivers we are expecting to use this?

I'd prefer not to merge a new API unless we at least have some idea
what's going to use it.

cheers