[Intel-gfx] [GVT-g] [ANNOUNCE] 2018-Q3 release of KVMGT (Intel GVT-g for KVM)

Xu, Terrence terrence.xu at intel.com
Fri Oct 19 07:04:47 UTC 2018

Hi all,

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-2.12.0)

Platform Support:

-    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), 7th generation (code name: Kabylake) and 7th SoC generation (code name: Broxton), the Broxton is new supported platform

Guest Operation System Validated:

-    Windows7 32-bit, Window7 64-bit, Windows8.1 64-bit, Windows10 64-bit

-    Ubuntu 18.04 64-bit

Major Changes since Q1'2018 Release:

-    This update is based on kernel version 4.17 and Qemu version 2.12.

-    Add the Broxton platform preliminary support for KVMGT.

-    Improve stability of dma-buf feature with some GPU reset issues be fixed.

-    More bug fixing and code refinement, please refer to 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.
-    For Broxton, only Linux guest is currently supported, and the Linux guest kernel must be the same as the host kernel.

Useful links:

-    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:



Important Note:

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.



Tel: +86-21-6116 5390

MP: +86-1356 4367 024

Mail: terrence.xu at intel.com<mailto:terrence.xu at intel.com>


GVT-g mailing list

iGVT-g at lists.01.org<mailto:iGVT-g at lists.01.org>


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