Dear all, I'm excited to share with you a breathtaking advance in the field of virtualized graphics: blob resources. Blob resources are size-based containers for host, guest, or host+guest allocations. These resources are designed with multi-process 3D support in mind, but also usable in virtio-gpu 2d. They are needed for GL4.5, Vulkan and zero-copy virtio-gpu. Details in the various patches. Patch 1 is a bug fix needed for drm-misc-next. Patches 2-4 are David Steven's F_RESOURCE_UUID patches. The spec has been approved by the virtio committee [a] and has ack's from many virtio [b] and DRM luminaries, but has of yet the patches haven't been merged into drm-misc-next. Hopefully, we can get a plan for these patches at least. Patches 5-7 are Sebastien Boeuf's shm region patches, which have been floating around for a while. Vivek sent them out with the latest virtio-fs patches and perhaps we can merge these somehow too. Patches 8-9 are random preparatory patches, and patches 10-12 are the uapi changes, and patches 12-24 are the blob implementation. The entire tree is available at: https://gitlab.freedesktop.org/virgl/drm-misc-next/-/commits/resource-blob Blob resources are a product of a congenial collaboration by many notable personalities from the Linux VM graphics ecosystem. Thanks to everyone who participated! --- Open-source userspace --- As per DRM requirements, there are open-source userspace implementations of blob resources. Patches have been reviewed or landed in Mesa [c], virglrenderer [d], AOSP [e], and crosvm [f]. Most of these features are behind a flag though. --- Testing --- Testing has taken place with x86 and ARM chromebooks, as well as standard Linux desktop environments. Intel/Nvidia GPUs have been tested. For Mesa, blob resources have been tested with Piglit's ARB_buffer_storage tests and apitraces. Apitraces of GL4.5 games show we're between 70% to 80% of host performance on Iris, based on a apitrace of a 2013 GL4.5 game: 11.204 FPS (guest) 15.947 FPS (host) This is still better than the status quo, when said game was unplayable with Virgl due to an inefficient GL4.3 fallback. But there's still room for improvement if we want to match HW-assisted virtualization. For gfxstream, blob resources have been tested with dEQP.vk.memory* and running Vulkan applications in production with the "Cuttlefish" virtual Android device [g]. Perhaps the best improvements come in terms of power. Blob resources have been shown decrease power consumption when playing 1080p60fps video by 10%. As such, embedded devices in particular should transition to zero-copy blob resources. [a] https://www.oasis-open.org/committees/ballot.php?id=3500 [b] https://lists.oasis-open.org/archives/virtio-dev/202006/msg00070.html [c] https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4821 [d] https://gitlab.freedesktop.org/virgl/virglrenderer/-/merge_requests/374 [e] https://android-review.googlesource.com/c/device/generic/goldfish-opengl/+/1283761 [f] https://chromium.googlesource.com/chromiumos/platform/crosvm/+/refs/heads/master/devices/src/virtio/gpu/virtio_3d_backend.rs#815 [g] https://source.android.com/setup/create/cuttlefish David Stevens (3): virtio: add dma-buf support for exported objects virtio-gpu: add VIRTIO_GPU_F_RESOURCE_UUID feature drm/virtio: Support virtgpu exported resources Gerd Hoffmann (6): virtio-gpu api: blob resources virtio-gpu api: host visible feature drm/virtio: implement blob resources: probe for the feature. drm/virtio: implement blob resources: probe for host visible region drm/virtio: implement blob resources: implement vram object drm/virtio: implement blob resources: resource create blob ioctl Gurchetan Singh (12): drm/virtio: Revert "drm/virtio: Call the right shmem helpers" drm/virtio: blob prep: refactor getting pages and attaching backing drm/virtio: blob prep: make CPU responses more generic virtio-gpu api: cross-device feature drm/virtio: implement blob resources: expose virtio_gpu_resource_id_get drm/virtio: implement blob resources: add new fields to internal structs drm/virtio: implement blob resources: hypercall interface drm/virtio: implement blob resources: blob display integration drm/virtio: implement blob resources: refactor UUID code somewhat drm/virtio: implement blob resources: fix stride discrepancy drm/virtio: implement blob resources: report blob mem to userspace drm/virtio: advertise features to userspace Sebastien Boeuf (3): virtio: Add get_shm_region method virtio: Implement get_shm_region for PCI transport virtio: Implement get_shm_region for MMIO transport drivers/gpu/drm/virtio/Makefile | 2 +- drivers/gpu/drm/virtio/virtgpu_debugfs.c | 24 +++ drivers/gpu/drm/virtio/virtgpu_drv.c | 4 + drivers/gpu/drm/virtio/virtgpu_drv.h | 90 +++++++++- drivers/gpu/drm/virtio/virtgpu_ioctl.c | 183 ++++++++++++++++++++- drivers/gpu/drm/virtio/virtgpu_kms.c | 45 ++++- drivers/gpu/drm/virtio/virtgpu_object.c | 44 +++-- drivers/gpu/drm/virtio/virtgpu_plane.c | 23 ++- drivers/gpu/drm/virtio/virtgpu_prime.c | 112 ++++++++++++- drivers/gpu/drm/virtio/virtgpu_vq.c | 200 ++++++++++++++++++++++- drivers/gpu/drm/virtio/virtgpu_vram.c | 164 +++++++++++++++++++ drivers/virtio/Makefile | 2 +- drivers/virtio/virtio.c | 6 + drivers/virtio/virtio_dma_buf.c | 82 ++++++++++ drivers/virtio/virtio_mmio.c | 31 ++++ drivers/virtio/virtio_pci_modern.c | 102 ++++++++++++ include/linux/virtio.h | 1 + include/linux/virtio_config.h | 19 +++ include/linux/virtio_dma_buf.h | 37 +++++ include/uapi/drm/virtgpu_drm.h | 39 ++++- include/uapi/linux/virtio_gpu.h | 97 +++++++++++ include/uapi/linux/virtio_mmio.h | 11 ++ include/uapi/linux/virtio_pci.h | 11 +- 23 files changed, 1290 insertions(+), 39 deletions(-) create mode 100644 drivers/gpu/drm/virtio/virtgpu_vram.c create mode 100644 drivers/virtio/virtio_dma_buf.c create mode 100644 include/linux/virtio_dma_buf.h -- 2.24.1 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
