On Fri, Mar 17, 2017 at 1:39 PM, Oleksandr Andrushchenko <andr2000@xxxxxxxxx> wrote: > Hello, > I am writing a para-virtualized DRM driver for Xen hypervisor > and it now works with DRM CMA helpers, but I would also like > to make it work with non-contigous memory: virtual machine > that the driver runs in can't guarantee that CMA is actually > physically contigous (that is not a problem because of IPMMU > and other means, the only constraint I have is that I cannot mmap > with pgprot == noncached). So, I am planning to use *drm_gem_get_pages* + > *shmem_read_mapping_page_gfp* to allocate memory for GEM objects > (scanout buffers + dma-bufs shared with virtual GPU) > > Do you think this is the right approach to take? I guess if you had some case where you needed to "migrate" buffers between host and guest memory, then TTM might be useful. Otherwise this sounds like the right approach. BR, -R _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
