Hi all, We are pleased to announce another 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 4th generation Intel Core(TM) processors with Intel Graphics processors. 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. Repositories: Kernel: https://github.com/01org/igvtg-kernel (2016q1-4.3.0 branch) Qemu: https://github.com/01org/igvtg-qemu (2016q1-2.3.0 branch) This update consists of: - KVMGT now has better support for 5th generation (Broadwell) Intel Core(TM) processors, Xeon(R) E3 v4 - A new feature, QEMU compositor display is added to support display VM in QEMU window. (use i915.enable_vgtbuffer=1 in kernel command line to enable this feature, disabled by default, details please refer to the Setup Guide) - 2D/3D/Media workloads can be run simultaneously in multiple guests. - Support both Windows Guest and Linux Guest(Win7-32, Win7-64, Win8.1-64, Ubuntu14.04-64) - Host Linux kernel has been upgraded from 4.2.0 to 4.3.0 (based on drm-intel) - KVMGT has preliminary support for 6th generation (Skylake) Intel Core(TM) processors. Known issues: - At least 2GB memory is suggested for VM to run most 3D workloads. - On some particular platform, assigning >2G memory to VM will cause Linux VM failed to boot up and Windows VM failed to load GFX driver. - Using VLC to play .ogg file may cause mosaic or slow response. - Running heavy 3D workloads in multiple guests for couple of hours may cause stability issue.(use i915.preemption_policy=3 in host kernel cmd line can work around this stability issue) Please subscribe to join the mailing list: https://lists.01.org/mailman/listinfo/igvt-g Official iGVT-g portal: https://01.org/igvt-g More information about background, architecture and others about Intel GVT-g, can be found at: http://www.linux-kvm.org/images/f/f3/01x08b-KVMGT-a.pdf https://www.usenix.org/conference/atc14/technical-sessions/presentation/tian The upstreaming effort of iGVT-g project is ongoing elsewhere, not as a part of this release. 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. -- Thanks, Jike On 01/27/2016 02:32 PM, Jike Song wrote: > Hi all, > > We are pleased to announce another 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 4th generation Intel Core(TM) processors with Intel Graphics processors. 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. > > Repositories: > > Kernel: https://github.com/01org/igvtg-kernel (2015q4-4.2.0 branch) > Qemu: https://github.com/01org/igvtg-qemu (kvmgt_public2015q4 branch) > > This update consists of: > > - KVMGT now has better support for 5th generation (Broadwell) Intel Core(TM) processors, 2D/3D/Media workloads can be run simultaneously in multiple guests. > - Host Linux kernel has been upgraded from 3.18.0 to 4.2.0 (based on drm-intel) > > Next update will be around early April, 2016. > > Known issues: > > - At least 2GB memory is suggested for VM to run most 3D workloads. > - Using VLC to play .ogg file may cause mosaic or slow response. > - Running heavy 3D workloads in multiple guests for couple of hours may cause stability issue. > > Official iGVT-g portal: https://01.org/igvt-g > Please subscribe the mailing list: https://lists.01.org/mailman/listinfo/igvt-g > > More information about background, architecture and others about Intel GVT-g, can be found at: > > http://www.linux-kvm.org/images/f/f3/01x08b-KVMGT-a.pdf > https://www.usenix.org/conference/atc14/technical-sessions/presentation/tian > > > 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. > > > -- > Thanks, > Jike > > On 10/27/2015 05:36 PM, Jike Song wrote: >> Hi all, >> >> We are pleased to announce another update of Intel GVT-g for KVM. >> >> Intel GVT-g is a full GPU virtualization solution with mediated pass-through, starting from 4th generation Intel Core(TM) processors with Intel Graphics processors. 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. KVM is supported by Intel GVT-g(a.k.a. KVMGT). >> >> >> Repositories >> >> Kernel: https://github.com/01org/igvtg-kernel (2015q3-3.18.0 branch) >> Qemu: https://github.com/01org/igvtg-qemu (kvmgt_public2015q3 branch) >> >> >> This update consists of: >> >> - KVMGT is now merged with XenGT in unified repositories(kernel and qemu), but currently >> different branches for qemu. KVMGT and XenGT share same iGVT-g core logic. >> - PPGTT supported, hence the Windows guest support >> - KVMGT now supports both 4th generation (Haswell) and 5th generation (Broadwell) Intel Core(TM) processors >> - 2D/3D/Media decoding have been validated on Ubuntu 14.04 and Windows7/Windows 8.1 >> >> Next update will be around early Jan, 2016. >> >> Known issues: >> >> - At least 2GB memory is suggested for VM to run most 3D workloads. >> - 3Dmark06 running in Windows VM may have some stability issue. >> - Using VLC to play .ogg file may cause mosaic or slow response. >> >> >> Please subscribe the mailing list to report BUGs, discuss, and/or contribute: >> >> https://lists.01.org/mailman/listinfo/igvt-g >> >> More information about Intel GVT-g background, architecture, etc can be found at(may not be up-to-date): >> >> https://01.org/igvt-g >> http://www.linux-kvm.org/images/f/f3/01x08b-KVMGT-a.pdf >> https://www.usenix.org/conference/atc14/technical-sessions/presentation/tian >> >> >> 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. >> >> >> -- >> Thanks, >> Jike >> >> On 12/04/2014 10:24 AM, Jike Song wrote: >>> Hi all, >>> >>> We are pleased to announce the first release of KVMGT project. KVMGT is the implementation of Intel GVT-g technology, a full GPU virtualization solution. Under Intel GVT-g, 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 of performance, feature, and sharing capability. >>> >>> >>> KVMGT is still in the early stage: >>> >>> - Basic functions of full GPU virtualization works, guest can see a full-featured vGPU. >>> We ran several 3D workloads such as lightsmark, nexuiz, urbanterror and warsow. >>> >>> - Only Linux guest supported so far, and PPGTT must be disabled in guest through a >>> kernel parameter(see README.kvmgt in QEMU). >>> >>> - This drop also includes some Xen specific changes, which will be cleaned up later. >>> >>> - Our end goal is to upstream both XenGT and KVMGT, which shares ~90% logic for vGPU >>> device model (will be part of i915 driver), with only difference in hypervisor >>> specific services >>> >>> - insufficient test coverage, so please bear with stability issues :) >>> >>> >>> >>> There are things need to be improved, esp. the KVM interfacing part: >>> >>> 1 a domid was added to each KVMGT guest >>> >>> An ID is needed for foreground OS switching, e.g. >>> >>> # echo <domid> > /sys/kernel/vgt/control/foreground_vm >>> >>> domid 0 is reserved for host OS. >>> >>> >>> 2 SRCU workarounds. >>> >>> Some KVM functions, such as: >>> >>> kvm_io_bus_register_dev >>> install_new_memslots >>> >>> must be called *without* &kvm->srcu read-locked. Otherwise it hangs. >>> >>> In KVMGT, we need to register an iodev only *after* BAR registers are >>> written by guest. That means, we already have &kvm->srcu hold - >>> trapping/emulating PIO(BAR registers) makes us in such a condition. >>> That will make kvm_io_bus_register_dev hangs. >>> >>> Currently we have to disable rcu_assign_pointer() in such functions. >>> >>> These were dirty workarounds, your suggestions are high welcome! >>> >>> >>> 3 syscalls were called to access "/dev/mem" from kernel >>> >>> An in-kernel memslot was added for aperture, but using syscalls like >>> open and mmap to open and access the character device "/dev/mem", >>> for pass-through. >>> >>> >>> >>> >>> The source codes(kernel, qemu as well as seabios) are available at github: >>> >>> git://github.com/01org/KVMGT-kernel >>> git://github.com/01org/KVMGT-qemu >>> git://github.com/01org/KVMGT-seabios >>> >>> In the KVMGT-qemu repository, there is a "README.kvmgt" to be referred. >>> >>> >>> >>> More information about Intel GVT-g and KVMGT can be found at: >>> >>> https://www.usenix.org/conference/atc14/technical-sessions/presentation/tian >>> http://events.linuxfoundation.org/sites/events/files/slides/KVMGT-a%20Full%20GPU%20Virtualization%20Solution_1.pdf >>> >>> >>> Appreciate your comments, BUG reports, and contributions! >>> >>> >>> >>> >>> -- >>> Thanks, >>> Jike >>> -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
