5. QEMU version 4.2.0 released

QEMU version 4.2.0 released


  • We would like to announce the availability of the QEMU 4.2.0 release. This release contains 2200+ commits from 198 authors.

    You can grab the tarball from our download page. The full list of changes are available in the Wiki.

    Highlights include:

    • TCG plugin support for passive monitoring of instructions and memory accesses
    • block: NBD block driver now supports more efficient handling of copy-on-read requests
    • block: NBD server optimizations for copying of sparse images, and general fixes/improvements for NBD server/client implementations
    • block/crypto: improved performance for AES-XTS encryption for LUKS disk encryption
    • vfio-pci support for “failover_pair_id” property for easier migration of VFIO devices
    • virtio-mmio now supports virtio-compatible v2 personality and virtio 1.1 support for packed virtqueues
    • 68k: new “next-cube” machine for emulating a classic NeXTcube
    • 68k: new “q800” machine for emulating Macintosh Quadro 800
    • ARM: new “ast2600-evb” machine for emulating Aspeed AST2600 SoC
    • ARM: semihosting v2.0 support with STDOUT_STDERR/EXIT_EXTENDED extentions
    • ARM: KVM support for more than 256 CPUs
    • ARM: “virt” machine now supports memory hotplugging
    • ARM: improved TCG emulation performance
    • ARM: KVM support for SVE SIMD instructions on SVE-capable hardware
    • PowerPC: emulation support for mffsce, mffscrn, and mffscrni POWER9 instructions
    • PowerPC: “powernv” machine now supports Homer and OCC SRAM system devices
    • RISC-V: “-initrd” argument now supported
    • RISC-V: debugger can now see all architectural state
    • s390: emulation support for IEP (Instruction Execution Protection)
    • SPARC: “sun4u” IOMMU now supports “invert endianness” bit
    • x86: VMX features can be enabled/disabled via “-cpu” flags
    • x86: new “microvm” machine that uses virtio-mmio instead of PCI for use as baseline for performance optimizations
    • x86: emulation support for AVX512 BFloat16 extensions
    • x86: new CPU models for Denverton (server-class Atom-based SoC), Snowridge, and Dhyana
    • x86: macOS Hypervisor.framework support (“-accel hvf”) now considered stable
    • xtensa: new “virt” machine type
    • xtensa: call0 ABI support for user-mode emulation
    • and lots more…

    Thank you to everyone involved!



    /2019/12/13/qemu-4-2-0/
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