Hi Will, Will Deacon <will.dea...@arm.com> writes: > [+ BenH and MPE] > > On Mon, Jan 14, 2019 at 07:21:08PM +0000, Koenig, Christian wrote: >> Am 14.01.19 um 20:13 schrieb Will Deacon: ... > >> > The Arm architecture (and others including Power afaiu) doesn't >> > guarantee coherency when memory is accessed using mismatched cacheability >> > attributes. ... > >> As far as I know Power doesn't really supports un-cached memory at all, >> except for a very very old and odd configuration with AGP. > > Hopefully Michael/Ben can elaborate here, but I was under the (possibly > mistaken) impression that mismatched attributes could cause a machine-check > on Power.
That's what I've always been told, but I can't actually find where it's documented, I'll keep searching. But you're right that mixing cached / uncached is not really supported, and probably results in a machine check or worse. cheers _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
