An open poll was conducted by QEMU upstream to gauge the usefulness of kqemu. This was thoroughly discussed on the upstream qemu-devel mailing list by the developers of QEMU, as well as many users. Why did upstream QEMU drop support for kqemu? And the upstream qemu-0.12 release series (which is in Ubuntu 10.04 LTS) actually removed all remnants of the kqemu hooks from the source. The upstream qemu-0.11 release series (which was in Ubuntu 9.10) disabled kqemu in the build. Quite simply, the upstream QEMU community deprecated kqemu in favor of kvm.
Why was support for kqemu dropped from Ubuntu? Just run kvm-ok from a command line and it should tell you. How do I know if my hardware supports VT? Otherwise, kqemu arguably may be useful on some legacy hardware without VT. If your CPU supports VT or you have access to hardware that supports VT, you have no need for kqemu, as kvm is a far more complete, better performing, fully supported, and more modern alternative. Unlike kvm, kqemu has never been accepted in the upstream Linux kernel.Īlso different from kvm is the fact that kqemu works on hardware that does not support CPU Virtualization Technology (VT extensions), see Intel VT and AMD-V. This means that systems lacking the hardware virtualization support that is required by kvm will not perform well in Ubuntu 10.04 LTS. KQEMU is not supported in Ubuntu 10.04 LTS.
Support for kqemu has been removed from the upstream source in qemu versions 0.11 and later. Kqemu was available in Ubuntu 8.04 to 9.04 from universe as a DKMS package. In this respect, it's similar to kvm.īeyond the kernel module, kqemu requires support from the QEMU userspace emulator to take advantage of the kqemu kernel hooks. Linaro IRC channel #linaro-tcwg on Libera.Kqemu is a kernel module that "accelerates" QEMU virtualization by allowing guests to run some operations directly on the host's CPU. Upstream IRC channel is #qemu on OFTC, Engineers nics are pm215, rth and stsquad The majority of the discussion is upstream with few Linaro specific calls and the occasional upstream KVM call on a Tuesday Improve the developer experience of using QEMUĪs we have expertise in JITs and code generation we also have interests in other tools such as Valgrind and what would be needed to enhance them to support developments in the architecture. Support it as a software reference platforms for a number of projects Our primary goals are:Įnsure an active and well maintained upstream project The QEMU team within Linaro are responsible for maintaining many parts of the project including ARM specific code, the core translation engine, developer features and parts of the testing automation and CI loop. We believe it is a key tool for open source projects who want to develop for the ARM ecosystem and experiment with the latest features.
QEMU is a multi-platform Virtual Machine Monitor (VMM) and emulator.
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