Difference between revisions of "Merged Drivers"
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== AMDGPU + GPU-IOV Module Merged == | == AMDGPU + GPU-IOV Module Merged == | ||
At this time AMDGPU does not currently support VFIO-Mdev functionality. It may be possible to | At this time AMDGPU does not currently support VFIO-Mdev functionality. It may be possible to incorporate [https://openmdev.io/index.php/Mediated_Device_Internals#RPC_Mode RPC Mode mediated device support] similar to those functions in nvidia.ko and i915.ko in the [https://github.com/torvalds/linux/tree/master/drivers/gpu/drm/amd/amdgpu Linux kernel's AMDGPU driver sources] to produce a merged driver for use on AMD GPUs. | ||
=== Known Issues === | === Known Issues === | ||
Revision as of 22:19, 26 April 2022
The following page will provide specifications and details on the current state of host DRM + VFIO-Mdev drivers in support of various vendors.
Intel i915
Intel's slides mention the ability to accelerate up to '8 VMs plus DOM0'. Source: https://01.org/sites/default/files/documentation/an_introduction_to_intel_gvt-g_for_external.pdf
Intel currently supports host DRM and VFIO-Mdev functionality in it's i915 driver sources.
Known Issues
- SR-IOV functionality is undocumented in the i915 driver API documentation.
Confirmed affected versions: *
Nvidia
For more information on host DRM and VFIO-Mdev support on Nvidia drivers refer to section 6 of the vGPU Community Wiki.
Known Issues
- Power management on laptops running mediated graphics functionality may causes graphical errors when not plugged in to AC power.
Confirmed affected versions: 460.32.01, 460.73.04
Possible mitigation (lore.kernel.org vfio/pci power management patch): "vfio/pci: Change the PF power state to D0 before enabling VFs" - VFIO-vmalloc errors may occur as a result of page collisions between host & guest on GPUs with smaller VRAM frame buffer sizes.
Confirmed affected versions: 460.32.01, 460.73.04
AMDGPU + GPU-IOV Module Merged
At this time AMDGPU does not currently support VFIO-Mdev functionality. It may be possible to incorporate RPC Mode mediated device support similar to those functions in nvidia.ko and i915.ko in the Linux kernel's AMDGPU driver sources to produce a merged driver for use on AMD GPUs.
Known Issues
- Host DRM does not work alongside guest VFIO-Mdev.
Confirmed affected versions: * - Hardware accelerated encoding/decoding via GPU-IOV Module (GIM) does not work.
Confirmed affected versions: 3.0