QEMU 2.1.0发布啦，QEMU是一套由Fabrice Bellard所编写的模拟处理器的自由软件。它与Bochs，PearPC近似，但其具有某些后两者所不具备的特性，如高速度及跨平台的特性。经由kqemu这个开源的加速器，QEMU能模拟至接近真实电脑的速度。
* Support for memory hotplug on x86 guests * Support for pinning memory on host NUMA nodes on x86 guests * Basic hot-plug/hot-unplug support for x86 guests using Q35 machine-type * Support for TCG-based system emulation on AArch64 (in addition KVM-based virtualization) * AArch64 SHA and Crypto instruction support. * Support for VFIO-based device passthrough on pSeries/PowerKVM guests * Migration support for virtio-ccw on s390x guests * Improved IOMMU emulation for SPARC guests * Full support for USB3 passthrough (including streams). * Multi-seat support for GTK+ and SDL 2.0 UIs, and lots of bug fixes. * Dedicated threading model for virtio-blk, virtio-blk dataplane, now supports almost all features of the block layer including: image formats, POSIX AIO, I/O throttling, statistics and error recovery * Fixes migration from QEMU 1.7 when certain bridge/CPU combinations are in use (see changelog for notes on migration incompatibilities between 2.0 and 2.1 for certain guest configuations), and new code/tools to detect migration issues * And lots more...