2018-Q3 release of KVMGT (Intel GVT-g for KVM)
We are pleased to announce an update of Intel GVT-g for KVM.
Intel GVT-g for KVM (a.k.a. KVMGT) is a full GPU virtualization solution with mediated pass-through, starting from 5th generation Intel Core(TM) processors with Intel processor graphics. A virtual GPU instance is maintained for each VM, with part of performance critical resources directly assigned. The capability of running native graphics driver inside a VM, without hypervisor intervention in performance critical paths, achieves a good balance among performance, feature, and sharing capability.
- Kernel: https://github.com/01org/gvt-linux (tag: 2018-q3-gvt-stable-4.17)
- Qemu: https://github.com/01org/igvtg-qemu (tag: 2018-q3-stable-2.10.2)
- Server platforms: Intel(r) Xeon(r) E3_v4, E3_v5 and E3_v6 with Intel Graphics processor
- Client platforms: Intel(r) Core(tm) 5th generation (code name: Broadwell), 6th generation (code name: Skylake) and 7th generation (code name: Kabylake)
- SoC platform: 7th SoC generation (code name: Broxton)
Guest Operation System Validated:
- Windows7 32-bit, Window7 64-bit and Windows8.1 64-bit with Intel Windows Graphics Driver version 15.45, Windows10 64-bit with Intel Windows Graphics Driver version 126.96.36.19926.
- Ubuntu 18.04 64-bit
Major Changes since Q1’2018 Release:
- This release is based on Kernel version 4.17 and Qemu version 2.12.
- Broxton platform preliminary support is implemented.
- Stability of dma-buf feature is improved with some GPU reset issues be fixed.
- vGPU command parsing is optimized.
- More bug fixings and code refinements, please refer to codes' git log.
Limitation or known issues:
- Due to graphics hardware resource limitation, the maximum number of Windows VM is 7.
- The pre-defined type 1, 2 or 4 of vGPU must be created for VM to install Windows 7 32-bit. vGPU type 8 is not allocated to have enough graphics resource to support Windows 7 32-bit.
- Some 3rd party applications/tools like GPU_Z, Passmark 9.0 running in Windows VM may meet BSOD error. The workaround is to add “kvm.ignore_msrs=1” in host kernel’s command line to avoid this.
- There are still instability issues about Guest VM stability while the IOMMU feature is enabled on a few Broadwell and Kabylake machines. The workaround is to turn off IOMMU on Intel graphics device by adding “intel_iommu=igfx_off” in Host kernel’s command line.
- Windows 10 virtual machine with Intel Windows graphics drivers ealier than version 188.8.131.5226 may meet black screen or VM crash on executing GPU workloads.
- Setup guide:
- New upstream architecture design introduction:
- Please subscribe to join the mailing list if you want to learn more about GVT-g project:
- Please subscribe to join the mailing list if you want to contribute/review latest GVT-g upstream patches:
- Official GVT-g portal:
- More information about background, architecture and others about Intel GVT-g, can be found at:
The KVMGT project should be considered a work in progress. As such it is not a complete product nor should it be considered one. Extra care should be taken when testing and configuring a system to use the KVMGT project.