[PATCH v8 0/7] Add non-coherent DMA support for AX45MP

[Christoph Hellwig]

On Wed, Apr 19, 2023 at 08:59:03AM -0700, Palmer Dabbelt wrote:
> IMO we should just take the support in Linux: trying to hide stuff behind the
> SBI leads to more more headaches than it's worth, we end up with a bunch of
> broken firmware to try and work around.  We've already got a mess here because
> of the D1 support, we might as well just live with it.

I strongly disagree.  Adding more and more per-vendor ops simply does
not scale.  We're getting us into a giant long-time mess that will be
unfixable.