[RFC QEMU PATCH 00/18] Add VirtIO GPU and Passthrough GPU support on Xen

[Huang Rui <ray.huang@xxxxxxx>]

Hi all,

We are working to introduce VirtIO GPU and Passthrough GPU support on Xen.

https://lists.xenproject.org/archives/html/xen-devel/2023-03/msg00714.html

Currently, only virgl for VirtIO GPU and Passthrough GPU on PV dom0 can
works on Xen. These series introduce more graphic support for Xen on QEMU
part.

1) Add Venus with QEMU for VirtIO GPU on Xen

Antonio Caggiano made the venus with QEMU on KVM platform below, patch 1 to
11 are inherited from his original work to support the features of
context init, hostmem, resource uuid, and blob resources for Venus. We have
rebase the support to the latest version.
https://www.collabora.com/news-and-blog/blog/2021/11/26/venus-on-qemu-enabling-new-virtual-vulkan-driver/

But on Xen, it still needs to add "-mem-path" function in the QEMU. Because
it requires the memory-backend-memfd support. Please check patch 12 to 16.

With the Venus supported on Xen, we can enable Zink + Venus for OpenGL
rendering on guest domU as well.

2) Add Video hardware accelerate support for virgl

Please check patch 17, that adds get_drm_fd callback to let guest know
hardware accel codec is used.

3) Enable Passthrough GPU on Xen PVH dom0 in QEMU

Please check patch 18, that translate host irq to gsi for PCIe Passthrough
on PVH dom0.

Below are the screenshot of these functions, please take a look.

Venus: 
https://drive.google.com/file/d/1_lPq6DMwHu1JQv7LUUVRx31dBj0HJYcL/view?usp=share_link
Zink: 
https://drive.google.com/file/d/1FxLmKu6X7uJOxx1ZzwOm1yA6IL5WMGzd/view?usp=share_link
Passthrough GPU: 
https://drive.google.com/file/d/17onr5gvDK8KM_LniHTSQEI2hGJZlI09L/view?usp=share_link

Repositories
Kernel: 
https://git.kernel.org/pub/scm/linux/kernel/git/rui/linux.git/log/?h=upstream-fox-xen
Xen: https://gitlab.com/huangrui123/xen/-/commits/upstream-for-xen
QEMU: https://gitlab.com/huangrui123/qemu/-/commits/upstream-for-xen
Mesa: https://gitlab.freedesktop.org/rui/mesa/-/commits/upstream-for-xen
Virglrenderer: 
https://gitlab.freedesktop.org/rui/virglrenderer/-/commits/upstream-for-xen

Thanks,
Ray

Antonio Caggiano (8):
  virtio-gpu: Handle resource blob commands
  virtio-gpu: CONTEXT_INIT feature
  virtio-gpu: Unrealize
  virtio-gpu: Resource UUID
  virtio-gpu: Support Venus capset
  virtio-gpu: Initialize Venus
  meson: Enable virglrenderer unstable APIs
  virtio-gpu: Handle set scanout blob command

Chen Jiqian (1):
  xen: translate irq of host pci device to gsi

Dr. David Alan Gilbert (1):
  virtio: Add shared memory capability

Gerd Hoffmann (1):
  virtio-gpu: hostmem

Honglei Huang (2):
  virtio-gpu: fix hw-display-virtio-gpu.so undefined symbol
    virtio_gpu_virgl_resource_unmap
  virtio-gpu: Add video hardware accelerate support for virgl

Huang Rui (4):
  softmmu: Fix the size to map cache with xen for host virtual address
  hw/i386/xen/xen-hvm: Introduce xen_ram_block_check function
  softmmu: Add ram block check to map the xen ram memory
  softmmu: Enable qemu ram allocation with fd for Xen

Robert Beckett (1):
  virtio-gpu: make blob scanout use dmabuf fd

 hw/display/meson.build                      |   2 +-
 hw/display/trace-events                     |   1 +
 hw/display/virtio-gpu-base.c                |   7 +-
 hw/display/virtio-gpu-pci.c                 |  14 +
 hw/display/virtio-gpu-virgl.c               | 326 +++++++++++++++++++-
 hw/display/virtio-gpu.c                     | 101 +++++-
 hw/display/virtio-vga.c                     |  33 +-
 hw/i386/xen/xen-hvm.c                       |  15 +
 hw/virtio/virtio-pci.c                      |  18 ++
 hw/xen/xen-host-pci-device.c                |   3 +-
 include/hw/virtio/virtio-gpu-bswap.h        |  18 ++
 include/hw/virtio/virtio-gpu.h              |  28 ++
 include/hw/virtio/virtio-pci.h              |   4 +
 include/hw/xen/xen.h                        |   1 +
 include/standard-headers/linux/virtio_gpu.h |   2 +
 meson.build                                 |  11 +
 softmmu/physmem.c                           |  12 +-
 17 files changed, 559 insertions(+), 37 deletions(-)

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2.25.1