From: "Edgar E. Iglesias" <edgar.iglesias@xxxxxxxxxx> I'm trying to run rpmsg and remoteproc on the ZynqMP (arm64) but I'm hitting a DMA/mm error. The issue was discussed here: http://lists.infradead.org/pipermail/linux-arm-kernel/2015-March/333050.html Russel King pointed out that the arm64 is not doing anything wrong by returning vmapped memory (which is incompatible with sg_phys()). Hence this RFC series that tries to illustrate/fix the problem in rpmsg/virtio. Is this going in the right direction? Any ideas or suggestions on how to better fix this? Something that worries me a little is that it would be nice if the DMA capability for virtio protocols was not hardcoded like this but rather somehow selectable by the framework. I was hoping that it would be possible to use _any_ virtio based protocol to communicate with remote-proc/DMA and not just rpmsg. Thanks, Edgar Edgar E. Iglesias (4): virtio_ring: Break out vring descriptor setup code virtio_ring: Add option for DMA mapped sgs in virtqueue_add virtio: Add dma variants of virtqueue_add_in and outbuf rpmsg: DMA map sgs passed to virtio drivers/rpmsg/virtio_rpmsg_bus.c | 28 ++++++++++++++++----- drivers/virtio/virtio_ring.c | 53 +++++++++++++++++++++++++++++++--------- include/linux/virtio.h | 10 ++++++++ 3 files changed, 74 insertions(+), 17 deletions(-) -- 1.9.1 _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
