From: Marc-André Lureau <marcandre.lur...@redhat.com> Hi,
vhost-user allows to drive a virtio device in a seperate process. So far, it has been mainly used with virtio-net. It can work with other devices such as input and gpu, as shown in this series. Some of the benefits of using vhost-user are: - parallelism, since the backend is running in a different process - flexibility, since backends may be implemented by various parties - some process isolation (virgl is fairly recent project and a lot of security issues have been found, opengl isn't super safe either and it may run on closed-source and large gl libraries), although having a limited access to guest memory could be safer. You can run the vhost-user-gpu backend with spice only (since importing dmabuf requires an egl context, it's not easy to do it with sdl/gtk ui), it provides the basic cursor/2d/3d rendering, but lacks some features (such as resize): -object vhost-user-backend,id=vug,cmd="./vhost-user-gpu" -device virtio-vga,virgl=true,vhost-user=vug -spice disable-ticketing,gl=on,unix,addr=/tmp/spice.soc As for vhost-user-input, it takes an input device path: -object vhost-user-backend,id=vuid,cmd="vhost-user-input /dev/input/event0" -device virtio-input-host-pci,vhost-user=vuid This is based on top of libvhost-user series sent earlier on ML. For convenience, the branch is also available on github: https://github.com/elmarco/qemu/ vhost-user-gpu Comments welcome! Marc-André Lureau (14): Add qemu_chr_open_socket() Add vhost-user-backend vhost-user: split vhost_user_read() vhost-user: add vhost_user_input_get_config() Add vhost-user backend to virtio-input-host contrib: add vhost-user-input misc: rename virtio-gpu.h header guard vhost: make sure call fd has been received qemu-char: use READ_RETRIES qemu-char: block during sync read console: add dpy_gl_scanout2() contrib: add vhost-user-gpu vhost-user: add vhost_user_gpu_set_socket() Add virtio-gpu vhost-user backend Makefile | 6 + Makefile.objs | 2 + backends/Makefile.objs | 2 + backends/vhost-user.c | 262 +++++++++ configure | 5 + contrib/libvhost-user/libvhost-user.h | 1 + contrib/vhost-user-gpu/Makefile.objs | 7 + contrib/vhost-user-gpu/main.c | 1012 ++++++++++++++++++++++++++++++++ contrib/vhost-user-gpu/virgl.c | 545 +++++++++++++++++ contrib/vhost-user-gpu/virgl.h | 24 + contrib/vhost-user-gpu/vugpu.h | 155 +++++ contrib/vhost-user-input/Makefile.objs | 1 + contrib/vhost-user-input/main.c | 369 ++++++++++++ docs/specs/vhost-user.txt | 9 + hw/display/Makefile.objs | 2 +- hw/display/vhost-gpu.c | 264 +++++++++ hw/display/virtio-gpu-pci.c | 6 + hw/display/virtio-gpu.c | 75 ++- hw/display/virtio-vga.c | 5 + hw/input/virtio-input-host.c | 67 ++- hw/input/virtio-input.c | 4 + hw/virtio/vhost-user.c | 97 ++- hw/virtio/vhost.c | 5 + hw/virtio/virtio-pci.c | 5 + include/hw/virtio/vhost-backend.h | 5 + include/hw/virtio/virtio-gpu.h | 11 +- include/hw/virtio/virtio-input.h | 2 + include/sysemu/char.h | 2 + include/sysemu/vhost-user-backend.h | 65 ++ include/ui/console.h | 10 + qemu-char.c | 43 +- ui/console.c | 12 + ui/spice-display.c | 19 + 33 files changed, 3073 insertions(+), 26 deletions(-) create mode 100644 backends/vhost-user.c create mode 100644 contrib/vhost-user-gpu/Makefile.objs create mode 100644 contrib/vhost-user-gpu/main.c create mode 100644 contrib/vhost-user-gpu/virgl.c create mode 100644 contrib/vhost-user-gpu/virgl.h create mode 100644 contrib/vhost-user-gpu/vugpu.h create mode 100644 contrib/vhost-user-input/Makefile.objs create mode 100644 contrib/vhost-user-input/main.c create mode 100644 hw/display/vhost-gpu.c create mode 100644 include/sysemu/vhost-user-backend.h -- 2.7.4
