Am Donnerstag, 16. Juni 2022, 14:11:57 CEST schrieb Christoph Hellwig: > On Thu, Jun 16, 2022 at 02:09:47PM +0200, Heiko Stübner wrote: > > My guess was that new platforms implementing cache-management will want > > to be non-coherent by default? > > No. Cache incoherent DMA is absolutely horrible and almost impossible > to get right for the corner cases. It is a cost cutting measure seen on > cheap SOCs and mostly avoided for more enterprise grade products. ok, then we'll do it the other way around as suggested :-) . Coherent by default and marking the non-coherent parts. DT people on IRC yesterday were also open to adding a dma-noncoherent property for that case. Heiko
