Difference between revisions of "Hypervisor Support"
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Latest revision as of 04:29, 12 October 2026
An absence of critical technical documentation has historically slowed growth and adoption of developer ecosystems for GPU virtualization.
This CC-BY-4.0 licensed content can either be used with attribution, or used as inspiration for new documentation, created by GPU vendors for public commercial distribution as developer documentation.
Where possible, this documentation will clearly label dates and versions of observed-but-not-guaranteed behaviour vs. vendor-documented stable interfaces/behaviour with guarantees of forward or backward compatibility.
Historical page. This page documents an earlier project or architecture (the OpenMdev / LibVF.IO era, 2021–2023). It is retained for reference and is not part of the current Open-IOV stack. Current documentation starts at Documentation.
| Platform Hypervisor | Virtual GPU support | Memory Sharing APIs | IOMMU Groups support | PCI forwarding | Mdev Support | SR-IOV Support | SIOV Support |
|---|---|---|---|---|---|---|---|
| KVM | Yes | IVSHMEM | Yes | Yes (via VFIO) | Yes | Yes | In Development |
| Xen | Yes | Grant Tables | No | Yes (via xen-pciback) | No | Yes | Unknown |
| NVMM | Unknown | Unknown | No | Unknown | No | Unknown | No |
KVM
This section will cover existing support in KVM for VFIO-Mdev and ongoing issues with it's existing implementation.
Missing Functionality
Nested SR-IOV.
Xen
This section will cover efforts to support the Xen hypervisor with open device mediation software.
XAPI docs for virtual GPUs can be read here.
Mdev drivers outside Dom0
Xen Hyperlaunch aims to disaggregate Dom0's monolithic functions. This includes a discrete domain for device drivers.
Missing Functionality
IOMMU Groups (discussions around extending or reworking Xen's IOMMU to include IOMMU Groups is ongoing).
Additional Documentation
For additional documentation check the XenProject Wiki.
NVMM
This section will cover NetBSD's NVMM.
Missing Functionality
VFIO.
Additional Documentation
For additional documentation read From Zero to NVMM.