On Thu, May 14, 2020 at 7:40 AM Daniel Vetter <daniel@xxxxxxxx> wrote: > > On Wed, May 13, 2020 at 05:03:11PM +0200, Thomas Zimmermann wrote: > > SHMEM-buffer backing storage is allocated from system memory; which is > > typically cachable. Currently, only virtio uses cachable mappings; udl > > uses its own vmap/mmap implementation for cachable mappings. Other > > drivers default to writecombine mappings. > > I'm pretty sure this breaks all these drivers. quick grep on a few > functions says this is used by lima, panfrost, v3d. And they definitely > need uncached/wc stuff afaiui. Or I'm completely missing something? Yes, that would be my guess. DMA is usually non-coherent on Arm. Rob _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
