Virtualization News Archives

Red Hat engineer Paolo Bonzini submitted the initial batch of KVM changes targeting the Linux 6.12 kernel. This is just the first batch and notably lacking all of the KVM x86 Intel/AMD changes for the cycle. But in the non-x86 space there is a fair amount of activity for this next kernel version for those making use of KVM as part of the open-source virtualization stack.

The LoongArch changes for the Kernel-based Virtual Machine (KVM) have been submitted ahead of the Linux 6.12 merge window opening. For enhancing KVM virtualization on these Chinese CPUs is enabling Loongson Binary Translation (LBT) for accelerating ARM/x86 binary translation.

Oracle today released version 7.1 of their VirtualBox virtualization software with an improved GUI, Wayland clipboard sharing support, OCI integration improvements, and other enhancements.

QEMU 9.1 is out in stable form today as the newest feature release to this open-source processor emulator that plays a vital role within the free software Linux virtualization stack.

The Bochs Direct Rendering Manager (DRM) kernel driver is in the process of being modernized. The Bochs driver is important in that it's commonly used for virtual VGA output with QEMU for Linux virtualization.

Released last month was the VirtualBox 7.1 Beta 1 virtualization software release from Oracle. This new version is bringing a modernized GUI, Wayland clipboard sharing, and other improvements. Released yesterday was the second beta of this big VirtualBox update.

The Cloud Hypervisor open-source project that serves as a Rust-written VMM focused on security and started by Intel but now backed by a multitude of vendors is out with its newest feature release. Cloud Hypervisor 41 is the new feature release worked on by engineers at Intel, Google, Microsoft, Rivos, Tencent, Ant Group, and others for this cloud and security minded virtual machine monitor.

The Xen Project has announced version Xen 4.19 of this open-source hypervisor that is rolling out security improvements, performance and scalability enhancements, and other refinements to this cross-architecture option for open-source virtualization.

Oracle today released the first public beta of their VirtualBox 7.1 virtualization software.

When it comes to virtualization with the Linux 6.11 kernel, in addition to the latest AMD SEV-SNP code making it upstream, for those making use of VMware virtualization products their initial "VMware Hypercall" API has been merged.

The Kernel-based Virtual Machine (KVM) updates for Linux 6.11 have been merged and it's a very exciting one for AMD EPYC servers with SEV-SNP guest VM support finally being in the mainline kernel.

Canonical today released LXD 6.1 as the newest version of this Ubuntu-focused solution for managing virtual machines (VMs) and containers.

Cloud Hypervisor 40.0 is out today for this open-source Rust-written VMM that started off as an Intel software project and evolved into a multi-vendor initiative with backing from the likes of Microsoft, Arm, AMD, and others for a cloud-focused, security-critical virtualization hypervisor.

For months Broadcom has been working on the VMware Hypercall API for the Linux kernel. This "vmware_hyperscall" is a new family of functions for use by the VMware guest code and virtual device drivers in an architecture-independent manner.

All of the VirtIO updates are now ready for the Linux 6.10 merge window that is closing this weekend.

The KVM changes for the Linux 6.10 kernel were merged a few days ago for this important piece to the open-source Linux virtualization stack.

Mesa's Venus Vulkan driver has made cross-device functionality optional in order to enable QEMU support for this open-source driver for virtualized environments.

Cloud Hypervisor 39 was released on Saturday for this cloud-focused, Rust-based VMM started by Intel and now a multi-vendor Linux Foundation project.

QEMU 9.0 is out tonight as the latest feature release for this prominent component to the open-source Linux virtualization stack.

For confidential computing "CoCo" virtual machines where the VM host is assumed to be un-trusted and aims to be as isolated as possible, RdRand hardware random number generator instructions are one of the limited sources of entropy for guest VMs. Right now RdRand can fail and the CoCo guest VMs will continue to boot albeit with limited or no entropy to see the VM's random number generation. But being merged today as part of x86 fixes for Linux 6.9 is now requiring seeding RNG with RdRand for CoCo environments otherwise a kernel panic.

Patches posted today by an Intel engineer allow for importing scanout buffers from other devices with the VirtIO DRM driver that is used in the virtualization space. The importing of scanout buffers from other devices/drivers can allow for more efficient use by avoiding excess copies.

The Kernel-based Virtual Machine changes for Linux 6.9 continue to enhance the capabilities of the open-source Linux virtualization software stack.

Ahead of next month's Ubuntu 24.04 LTS release, Canonical has released LXD 5.21 as the newest feature update to this container and VM manager. LXD 5.21 now ships with a production-grade graphical user interface by default, brings AMD SEV support for memory encryption of VMs on EPYC CPUs, object storage support, and other features.

Announced one month ago by Cyberus Technology was an open-source KVM back-end for VirtualBox. This work by Cyberus allows for using the KVM hypervisor with VirtualBox as opposed to its custom kernel module maintained by Oracle. That KVM back-end has now been extended to support SR-IOV graphics virtualization.

Ant Group and Alibaba have proposed PVM, the Pagetable Virtual Machine, as a new virtualization framework built upon the Kernel-based Virtual Machine (KVM) hypervisor. PVM does not require hardware-assisted virtualization while working with KVM-enabled software like Kata Containers.

Cloud Hypervisor 38 rolled out this week as the newest version of this Rust-based VMM that was started by Intel while now a Linux Foundation hosted project being worked on by multiple different organizations.

Cyberus Technology announced today the open-source release of a KVM back-end developed for VirtualBox. This new back-end allows the VirtualBox VMM to run virtual machines utilizing the Linux KVM hypervisor instead of the custom kernel module relied upon by the standard Oracle VM VirtualBox software.

Stemming from work done at Amazon Web Services (AWS) for better handling hypervisor live updates, a "request for comments" patch series was sent out on the Linux kernel mailing list for Pkernfs. The Pkernfs proposal was first detailed publicly by AWS last year and is for persisting guest memory and kernel/device state safely across Kexec.

Libvirt as the virtualization API/toolkit developed by Red Hat for managing virtualization on Linux is out today with its v10.0 release.

The KVM virtualization changes for the in-development Linux 6.8 kernel is quite heavy on the feature side.

With the Linux 6.7 kernel there is now KVM virtualization support for LoongArch CPUs. With the upcoming Linux 6.8 kernel cycle, that KVM support is being further extended for these RISC-V-inspired and MIPS64-derived Chinese processors.

QEMU 8.2 has been released as the newest update for this open-source processor emulator that plays an important role within the open-source Linux virtualization stack.

A new Long-Term Support version of Cloud Hypervisor was released this week, which is the open-source project originally started by Intel as a cloud-focused and Rust-written VMM that now has wide industry backing including from multiple other CPU vendors.

AMD Secure Encrypted Virtualization (SEV) and Intel Trust Domain Extensions (TDX) are intended to help provide better security for virtual machines and are key elements to both companies investments around confidential computing. It turns out they have a common enemy in their VM security goals: x86 32-bit software.

As part of AWS Nitro Enclaves, coming for the Linux 6.8 kernel in the new year is a Nitro Secure Module driver.

The Linux Foundation today announced the release of the Xen Project Hypervisor 4.18 for this open-source hypervisor that serves as an alternative to Linux KVM use.

Distrobox 1.6 released on Sunday for this open-source project that makes it easy to launch any Linux distribution inside your terminal. Distrobox builds upon Podman and Docker to allow creating containers of the Linux distribution of your choice and for that to integrate nicely with the host environment. With succeeding releases, Distrobox has built up quite an arsenal of features.

The IOMMU changes for Linux 6.7 aren't particularly noteworthy besides adding SMMUv2 support for the Qualcomm SDM670 and SM7150 SoCs. But the IOMMU updates also take the kernel one step away from supporting Shared Virtual Addressing (SVA) on AMD platforms in the near future.

Cloud Hypervisor 36 has been released as this Rust-written VMM that started out as an Intel open-source project that since was folded into the Linux Foundation umbrella with support from Microsoft, Arm, and other vendors. More recently even the likes of AMD and Ampere Computing have been onboard with this cloud and security focused virtualization hypervisor.

The Kernel-based Virtual Machine (KVM) changes were sent out on Thursday for the Linux 6.7 merge window.

While confidential computing is a hot area right now, there's been a limited amount of cross-vendor cooperation with AMD having their own route with Secure Encrypted Virtualization (SEV) and Intel designing the Trusted Domain Extensions (TDX) that is still available in limited form. As one improvement coming with Linux 6.7, "configfs-tsm" has been submitted for pulling as a cross-vendor solution for confidential computing attestation reports.

Both AMD and Intel engineers have experienced a lengthy journey getting their latest virtualization security features into the mainline Linux kernel -- and one that is still ongoing.

Back in August Linux Containers forked the LXD project as Incus following Canonical's decision to take in control of LXD. Released this weekend was the first formal release for the Incus software.

The past several Linux kernel cycles has seen Loongson engineers working on implementing more kernel features for LoongArch, the MIPS-derived and RISC-V-inspired architecture out of China for domestic PCs. The performance of LoongArch CPUs so far still aren't competitive to x86_64 or Arm hardware but at least slowly are becoming more practical with more features being wired up. The latest milestone is the Kernel-based Virtual Machine (KVM) virtualization support appearing ready ahead of Linux 6.7.

Cloud Hypervisor 35 was released on Thursday for this open-source, Rust-based VMM that was originally started by Intel software engineers before evolving into a multi-vendor initiative for secure and cloud focused workloads.

Merged on Thursday were a batch of KVM virtualization changes for the Linux 6.6 kernel.

Microsoft continues improving the Hyper-V support within the Linux kernel for benefiting Linux guest VMs running within this hypervisor on Windows. With Linux 6.6 the Hyper-V code adds support for SEV-SNP secure guests on the AMD EPYC side while over on the Intel Xeon Scalable Sapphire Rapids side is initial support for Trust Domain Extensions (TDX) protected guests.

QEMU 8.1 is now available as the latest feature update to this important piece of the open-source Linux virtualization stack.

Cloud Hypervisor -- the Rust-written open-source VMM that was started by Intel while having evolved into a Linux Foundation project with backing from multiple organizations -- is out with the Cloud-Hypervisor 34 release.

There is a phenomenon where running a multi-threaded workload inside a virtual machine (VM) with Simultaneously Multi-Threading (SMT / Intel Hyper Threading) that a sibling thread could find itself busy while the CPU core is idle. A new Linux CFS patch series aims to make the scheduler better adapt to the QEMU topology.