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Open-source x86 virtualization application

"Virtual box" redirects here. For virtual computers in general, see virtual motorcar.

VirtualBox
VirtualBox logo since 2010

VirtualBox logo since 2010
VirtualBox 6.1.16 with Ubuntu 20.10 20210128 10 03 15.png

Running Ubuntu 20.ten with Oracle VM VirtualBox on Windows 10
Original author(s) Innotek
Developer(due south) Oracle Corporation
Initial release 17 January 2007; 15 years ago  (2007-01-17)
Stable release

6.1.32[1]Edit this on Wikidata / 18 January 2022
Repository
  • www.virtualbox.org/browser/vbox/trunk Edit this at Wikidata
Written in C, C++, x86 Assembly, Python
Operating system Windows, macOS (merely Intel-based Macs), Linux and Solaris[two]
Platform x86-64 only (version series v.x and earlier work on IA-32)[3]
Blazon Hypervisor
License Base of operations Package (USB support but for USB one.1): GNU General Public License version 2 (Optionally CDDL for most files of the source distribution), "Extension Pack" (including USB 3.0 support): PUEL
Website www.virtualbox.org Edit this at Wikidata

Oracle VM VirtualBox (formerly Sun VirtualBox, Sun xVM VirtualBox and Innotek VirtualBox) is a blazon-two hypervisor for x86 virtualization developed past Oracle Corporation.

VirtualBox was originally created by Innotek GmbH, which was acquired past Dominicus Microsystems in 2008, which was in turn caused by Oracle in 2010.

VirtualBox may exist installed on Microsoft Windows, macOS, Linux, Solaris and OpenSolaris. There are also ports to FreeBSD[iv] and Genode.[5] It supports the creation and management of guest virtual machines running Windows, Linux, BSD, Bone/2, Solaris, Haiku, and OSx86,[6] every bit well every bit limited virtualization of macOS guests on Apple tree hardware.[7] [8] For some invitee operating systems, a "Guest Additions" bundle of device drivers and arrangement applications is available,[9] [10] which typically improves performance, especially that of graphics, and allows changing the resolution of the guest Os automatically when the window of the virtual auto on the host OS is resized.[11]

Released under the terms of the GNU General Public License and, optionally, the CDDL for most files of the source distribution, VirtualBox is free and open-source software, though the Extension Pack is proprietary software.

History [edit]

Logo of VirtualBox OSE, 2007–2010

VirtualBox was showtime offered past Innotek GmbH from Weinstadt, Frg, under a proprietary software license, making one version of the product available at no toll for personal or evaluation use, subject to the VirtualBox Personal Use and Evaluation License (PUEL).[12] In January 2007, based on counsel past LiSoG, Innotek GmbH released VirtualBox Open up Source Edition (OSE) every bit complimentary and open-source software, subject to the requirements of the GNU General Public License (GPL), version 2.[xiii]

Innotek GmbH also contributed to the evolution of OS/2 and Linux support in virtualization[fourteen] and Bone/two ports[xv] of products from Connectix which were later acquired past Microsoft. Specifically, Innotek adult the "additions" code in both Windows Virtual PC and Microsoft Virtual Server, which enables diverse host–invitee OS interactions similar shared clipboards or dynamic viewport resizing.

Sun Microsystems acquired Innotek in February 2008.[16] [17] [eighteen]

Post-obit the acquisition of Sun Microsystems past Oracle Corporation in Jan 2010, the product was re-branded as "Oracle VM VirtualBox".[19] [20] [21]

In December 2019, VirtualBox started supporting only hardware-assisted virtualization, dropping back up for Software-based 1.[22] [2]

Release history [edit]

Version 3.2
  • Mac OS X Server guest support – experimental
  • Retentiveness ballooning (not available on Solaris hosts)
  • RAM deduplication (Folio Fusion) for Windows guests on 64-flake hosts
  • CPU hot-plugging for Linux (hot-add and hot-remove) and certain Windows guests (hot-add just)
  • Deleting snapshots while the VM is running
  • Multi-monitor guest setups in the GUI, for Windows guests
  • LSI Logic SAS controller emulation
  • Remote Desktop Protocol (RDP) video acceleration via a non-free extension
  • Run and control guest applications from the host – for automated software deployments
Version 4.0
  • The PUEL/OSE separation was abandoned in favor of an open up source base of operations production and a closed source extension pack that can be installed on top of the base product. Equally part of this change, additional components of VirtualBox were made open source (installers, documentation, device drivers)
  • Intel Hard disk audio codec emulation
  • Intel ICH9 chipset emulation
  • A new VM storage scheme where all VM data is stored in one single folder to better VM portability
  • Several UI enhancements including a new look with VM preview and scale fashion
  • On 32-bit hosts, VMs can each apply more than 1.5 GB of RAM
  • In addition to OVF, the unmarried file OVA format is supported
  • CPU utilise and I/O bandwidth can be express per VM
  • Back up for Apple DMG images (DVD)
  • Multi-monitor guest setups for Linux/Solaris guests (previously Windows just)
  • Resizing of disk image formats from Oracle, VDI (VirtualBox disk image), and Microsoft, VHD (Virtual PC hard deejay)
Version 4.i
  • Windows Aero support (experimental)
  • Virtual machine cloning
Version 4.2
  • Virtual motorcar groups – allows management of a group of virtual machines as a unmarried unit (power them on or off, take snapshots, etc.)
  • Some VM settings can be contradistinct during VM execution
  • Back up up to 36 NICs in example of the ICH9 chipset
  • Support for limiting network I/O bandwidth
  • Can automatically run VMs on host system startup (except on Windows hosts)
Version 4.3
  • VM video-capture support
  • Host touch device support (GUI passes host touch on events to guest)/USB virtualization of such devices
Version 5.0[23]
  • Paravirtualization support for Windows and Linux guests to improve time-keeping accuracy and performance
  • USB3 controller based on Intel's hardware implementation.[24] It is supported by whatever Windows version starting from Windows 8, whatever Linux kernel starting from 2.vi.31 and Mac OS 10 starting from version 10.7.4.[ commendation needed ]
  • Bidirectional elevate and drop support for Windows, Linux and Solaris guests
  • VM disk image encryption via a not-gratuitous extension
  • VM output scaling and HiDPI displays support
  • Hotplugging of SATA disks using GUI
  • USB traffic capturing
  • VMs can be disconnected from a GUI session and run in background[25]
  • AVX, AVX-2, AES-NI, SSE 4.i/four.ii instructions (if supported past the host CPU)
Version 6.0[26]
  • Support for exporting virtual machines to Oracle Cloud
  • A file manager which allows to control the guest file system and copy files from/to it
  • VMSVGA GPU driver for Linux hosts
  • Surround speakers setup back up
  • Support for hardware-assisted nested virtualization on AMD CPUs
Version 6.1[22]
  • Back up for importing virtual machines from Oracle Cloud
  • Added nested virtualization support for Intel CPUs (information technology was already available for AMD CPUs) starting with Intel Core i5 Broadwell
  • Experimental support for file transfers via drag-n-drop only for Windows host and guests (disabled past default, must be enabled using VBoxManage)
  • Support for virtio-scsi for difficult disks and optical drives, including kicking support
  • Support for hosts with upwardly to 1024 CPUs
  • DXVA (hardware accelerated video decoding) support for Windows guests
  • NVRAM back up for EFI which improves compatibility with many guest OSes
  • Software keyboard for entering whatsoever keys to a guest
  • Guest CPU use monitoring
  • Dropped support for software CPU virtualization: a CPU with hardware virtualization support is now required
  • Dropped support for PCI passthrough for Linux hosts
  • Soft (virtual) keyboard
Version 7.0 (in development)
  • Secure Boot support for guest operating systems[27]
  • TPM 2.0 module

Virtualization [edit]

Users of VirtualBox tin can load multiple invitee OSes nether a single host operating-system (host OS). Each guest tin be started, paused and stopped independently within its own virtual automobile (VM). The user can independently configure each VM and run it under a choice of software-based virtualization or hardware assisted virtualization if the underlying host hardware supports this. The host OS and guest OSs and applications tin can communicate with each other through a number of mechanisms including a common clipboard and a virtualized network facility. Guest VMs tin also directly communicate with each other if configured to practise and so.[28]

Hardware-assisted [edit]

VirtualBox supports both Intel's VT-x and AMD's AMD-V hardware-assisted virtualization. Making employ of these facilities, VirtualBox can run each guest VM in its own carve up address-infinite; the guest Bone ring 0 lawmaking runs on the host at ring 0 in VMX not-root mode rather than in band one.[ commendation needed ]

Starting with version 6.ane, VirtualBox just supports this method.[22] [2] Until then, VirtualBox specifically supported some guests (including 64-bit guests, SMP guests and sure proprietary OSs) only on hosts with hardware-assisted virtualization.[ citation needed ]

Devices and peripherals [edit]

VirtualBox emulates hard disks in three formats: the native VDI (Virtual Disk Prototype),[29] the VMDK of VMware and the VHD of Microsoft Windows. Information technology thus supports disks created by other hypervisor software. VirtualBox tin besides connect to iSCSI targets and to raw partitions on the host, using either as virtual hard disks. VirtualBox emulates IDE (PIIX4 and ICH6 controllers), SCSI, SATA (ICH8M controller) and SAS controllers to which difficult drives tin can be attached.

VirtualBox has supported Open Virtualization Format (OVF) since version two.2.0 (April 2009).[thirty]

Both ISO images and physical devices connected to the host can be mounted as CD or DVD drives. VirtualBox supports running operating systems from live CDs and DVDs.

By default, VirtualBox provides graphics support through a custom virtual graphics-card that is VBE or UEFI GOP compatible. The Guest Additions for Windows, Linux, Solaris, OpenSolaris, or OS/2 guests include a special video-commuter that increases video performance and includes boosted features, such as automatically adjusting the guest resolution when resizing the VM window[31] or desktop composition via virtualized WDDM drivers .

For an Ethernet network adapter, VirtualBox virtualizes these Network Interface Cards:[32]

  • AMD PCnet PCI Ii (Am79C970A)
  • AMD PCnet-Fast Iii (Am79C973)
  • Intel Pro/1000 MT Desktop (82540EM)
  • Intel Pro/1000 MT Server (82545EM)
  • Intel Pro/m T Server (82543GC)
  • Paravirtualized network adapter (virtio-net)

The emulated network cards allow most guest OSs to run without the need to find and install drivers for networking hardware as they are shipped as function of the guest OS. A special paravirtualized network adapter is as well available, which improves network performance past eliminating the need to match a specific hardware interface, but requires special driver support in the guest. (Many distributions of Linux ship with this commuter included.) By default, VirtualBox uses NAT through which Net software for end-users such as Firefox or ssh can operate. Bridged networking via a host network adapter or virtual networks between guests can also be configured. Up to 36 network adapters can be attached simultaneously, only just iv are configurable through the graphical interface.

For a sound carte, VirtualBox virtualizes Intel HD Audio, Intel ICH AC'97 and SoundBlaster xvi devices.[33]

A USB 1.1 controller is emulated and then that whatsoever USB devices attached to the host tin be seen in the guest. The proprietary extension pack adds a USB 2.0 or USB 3.0 controllers and, if VirtualBox acts equally an RDP server, it can also utilize USB devices on the remote RDP customer equally if they were connected to the host, although but if the client supports this VirtualBox-specific extension (Oracle provides clients for Solaris, Linux and Sun Ray thin clients that can do this, and have promised support for other platforms in time to come versions).[34]

Software-based [edit]

In the absence of hardware-assisted virtualization, versions vi.0 and before of VirtualBox could adopt a standard software-based virtualization approach. This mode supports 32-bit guest OSs which run in rings 0 and 3 of the Intel ring architecture.

  • The system reconfigures the guest Bone code, which would normally run in ring 0, to execute in ring i on the host hardware. Because this code contains many privileged instructions which cannot run natively in band 1, VirtualBox employs a Code Scanning and Assay Manager (CSAM) to browse the ring 0 code recursively earlier its commencement execution to identify problematic instructions and then calls the Patch Manager (PATM) to perform in-situ patching. This replaces the pedagogy with a jump to a VM-safe equivalent compiled code fragment in hypervisor retention.
  • The guest user-manner code, running in ring iii, by and large runs directly on the host hardware in ring iii.

In both cases, VirtualBox uses CSAM and PATM to inspect and patch the offending instructions whenever a fault occurs. VirtualBox also contains a dynamic recompiler, based on QEMU to recompile any existent mode or protected mode lawmaking entirely (e.thousand. BIOS lawmaking, a DOS invitee, or any operating system startup).[35]

Using these techniques, VirtualBox can achieve a performance comparable to that of VMware.[36] [37]

The feature was dropped starting with VirtualBox six.1.[22] [2]

Features [edit]

  • Snapshots of the RAM and storage that allow reverting to a prior country.
  • Screenshots and screen video capture
  • "Host key" for releasing the keyboard and mouse cursor to the host organization if captured (coupled) to the guest system, and for keyboard shortcuts to features such as configuration, restarting, and screenshot. By default, it is the right-side CTRL key.[38] [39]
  • Mouse pointer integration, meaning automatic coupling and uncoupling of mouse cursor when moved inside and exterior the virtual screen, if supported past guest operating arrangement.
  • Seamless mode – the ability to run virtualized applications side by side with normal desktop applications
  • Shared clipboard
  • Shared folders through "guest additions" software[40]
  • Special drivers and utilities to facilitate switching betwixt systems
  • Ability to specify amount of shared RAM, video retentiveness, and CPU execution cap
  • Ability to emulate multiple screens[41]
  • Control line interaction (in addition to the GUI)
  • Public API (Coffee, Python, Soap, XPCOM) to control VM configuration and execution[42]
  • Nested paging for AMD-V and Intel VT (just for processors supporting SLAT and with SLAT enabled)
  • Limited support for 3D graphics acceleration (including OpenGL up to (only not including) three.0 and Direct3D 9.0c via Wine'due south Direct3D to OpenGL translation)
  • SMP support (up to 32 virtual CPUs per virtual machine), since version 3.0
  • Teleportation (aka Live Migration)
  • 2D video output dispatch (not to exist mistaken with video decoding acceleration), since version 3.one
  • EFI has been supported since version iii.1 (Windows vii[43] [44] guests are not supported)[45]

Storage emulation [edit]

  • Power to mount virtual hd drives and disk images. Virtual optical disc images tin can exist used for booting and sharing files to invitee systems defective networking support.
  • NCQ support for SATA, SCSI and SAS raw disks and partitions
  • SATA disk hotplugging
  • Laissez passer-through mode for solid-state drives
  • Pass-through manner for CD/DVD/BD drives – allows users to play audio CDs, burn optical disks, and play encrypted DVD discs
  • Can disable host Bone I/O cache
  • Allows limitation of IO bandwidth
  • PATA, SATA, SCSI, SAS, iSCSI, floppy disk controllers
  • VM disk image encryption using AES128/AES256

Storage support includes:

  • Raw hd access – allows physical hard disk drive partitions on the host organisation to appear in the guest system
  • VMware Virtual Auto Disk (VMDK) format support – allows substitution of disk images with VMware
  • Microsoft VHD back up
  • QEMU qed and qcow disks
  • HDD format disks (only version ii; versions 3 and four are non supported) used by Parallels virtualization products

Limitations [edit]

  • 3D graphics acceleration for Windows guests earlier than Windows 7 [46] was removed in version 6.one.[47] This afflicted Windows XP [48] and Windows Vista.
  • VirtualBox has a very low transfer rate to and from USB2 devices.[49] [50]
  • Despite being an open source production, some of its features are available simply in a binary grade under a commercial license (see "VirtualBox Extension Pack" below).
  • No cumulative measurement of disk reading and writing similar in Microsoft Virtual PC.
  • USB3 devices pass through is not supported by older guest OSes like Windows Vista and Windows XP due to the lack of drivers however starting with version 5.0 VirtualBox offers experimental Renesas uPD720201 xHCI USB3 controller which allows to use USB3 in these operating systems through manual modification of configuration files.[51] [52]
  • Guest Additions for macOS are unavailable at this fourth dimension.[53]
  • Invitee Additions for Windows 9x (Windows 95, 98 and ME) are not bachelor. This results in poor performance due to the lack of graphics dispatch with the default xvi-bit color way (external third-party software is bachelor[54] [55] [56] to enable support for 32-bit color mode, resulting in better performance).[57] [58] [59]
  • EFI support is incomplete, e.one thousand. EFI boot for a Windows vii guest is not supported.[53] [45]
  • Only older versions of DirectX and OpenGL passthrough are supported (the feature tin be enabled using the 3D Acceleration option for each VM individually).[sixty]
  • Video RAM is limited to 128 MiB (256 MiB with second Video Dispatch enabled) due to technical difficulties[61] (merely changing the GUI to allow the user to classify more than video RAM to a VM or manually editing the configuration file of a VM won't piece of work and will consequence in a fatal mistake[61]).
  • Windows 95/98/98SE/ME cannot exist installed or work unreliably with modern CPUs (AMD Zen or newer) and hardware assisted virtualization (VirtualBox 6.1 and higher). This is due to these OSes not being coded correctly.[62] [63] [64]
  • VirtualBox 7.0 (currently available every bit a development snapshot[65]) and after is required to run a pristine Windows 11 guest.[27]

Host support [edit]

The supported operating systems include:[66]

  • Windows 8.1 and higher. Back up for 64-bit Windows was added with VirtualBox 1.5. Support for Windows XP was removed with VirtualBox 5.0. Back up for Windows Vista was removed with VirtualBox 5.two. Windows 7 support was removed in version 6.one.
  • Windows Server 2012 and college
  • Linux distributions
  • macOS from version ten.13 High Sierra to ten.fifteen Catalina (only on Intel-based Macs):
    • Preliminary Mac Bone X back up (beta stage) was added with VirtualBox i.four, full support with ane.6.
    • Mac OS X 10.4 (Tiger) support was removed with VirtualBox 3.ane.
    • Support for Mac Bone X 10.vii (Panthera leo) and earlier was removed with VirtualBox 5.0.
    • Support for Mac OS X 10.8 (Mountain Lion) was removed with VirtualBox v.1.
    • Back up for Mac OS 10 ten.9 (Mavericks) was removed with VirtualBox 5.ii. "VirtualBox Manual (Archived)". Archived from the original on 2018-12-17.
    • Back up for (Mac) OS Ten 10.10 Yosemite and Bone X 10.11 El Capitan was removed with VirtualBox 6.0.
    • Back up for macOS ten.12 Sierra was officially removed with VirtualBox vi.1 (equally of half-dozen.one.xvi information technology will nevertheless install and run, nonetheless) [66]
    • No back up of macOS 11 Big Sur and later versions is officially provided. Users reported various technical issues when running VirtualBox on macOS Large Sur.[67]
    • Considering VirtualBox is an x86 virtualization software, information technology is not available, and is not planned to be, for Apple tree silicon-based Macs.[68]
  • Oracle Solaris

Guests [edit]

Some features require the installation of the airtight-source "VirtualBox Extension Pack":[two]

  • Support for a virtual USB 2.0/3.0 controller (EHCI/xHCI)
  • VirtualBox RDP: support for the proprietary remote connection protocol adult by Microsoft and Citrix Systems.
  • PXE boot for Intel cards.
  • VM disk epitome encryption
  • Camera / webcam back up[69]

While VirtualBox itself is free to use and is distributed under an open up source license the VirtualBox Extension Pack is licensed under the VirtualBox Personal Use and Evaluation License (PUEL). Personal use is costless but commercial users need to purchase a license. Oracle routinely checks log files for downloads of the VirtualBox Extension Pack from nonresidential IP addresses and contacts unlicensed users to enforce compliance.[seventy] [ failed verification ]

While Guest Additions are installed within each suitable guest virtual machine, the Extension Pack is installed on the host running VirtualBox.

Licensing [edit]

The core parcel is, since version 4 in December 2010, complimentary software under GNU General Public License version two (GPLv2). The dissever "VirtualBox Oracle VM VirtualBox extension pack" providing back up for USB 2.0 and 3.0 devices, Remote Desktop Protocol (RDP), disk encryption, NVMe and Preboot Execution Environs (PXE) boot is under a proprietary license, chosen Personal Use and Evaluation License (PUEL), which permits use of the software for personal apply, educational apply, or evaluation, free of charge.[71] Since VirtualBox version 5.i.xxx[72] Oracle defines personal utilize as the installation of the software on a single host computer for non-commercial purposes.[73] Unlike some software using a proprietary license, the "VirtualBox Oracle VM VirtualBox extension pack" is not source-bachelor since it includes closed-source components, which does not brand the source code publicly available.[74]

Prior to version four, in that location were two different packages of the VirtualBox software. The full packet was offered gratis under the PUEL, with licenses for other commercial deployment purchasable from Oracle. A second parcel called the VirtualBox Open up Source Edition (OSE) was released nether GPLv2. This removed the same proprietary components not available under GPLv2.[73] [74]

Building the BIOS for VirtualBox since version 4.2 [ citation needed ] requires the use of the Open Watcom compiler,[75] for which the Sybase Open Watcom Public License is canonical every bit "Open Source" by the Open Source Initiative[76] but not as "gratuitous" by the Complimentary Software Foundation or under the Debian Free Software Guidelines.[75] [77]

Although VirtualBox has experimental support for macOS guests, the end user license agreement of macOS does not permit the operating system to run on non-Apple hardware, and this is enforced inside the operating system by calls to the Apple tree System Direction Controller (SMC) in all Apple machines, which verifies the authenticity of the hardware.[78]

Derivatives [edit]

A commercial port of VirtualBox OSE with built-in support for Straight X 12.1 / Vulkan 3D API inside virtual machines has been released by the main contributor of the FreeRDP project, called Thincast Workstation.[ citation needed ]

See as well [edit]

  • Comparison of platform virtualization software
  • VMware Workstation
  • OS level virtualization
  • x86 virtualization

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  77. ^ "Interview with Andy Hall, Production Manager for Oracle VM VirtualBox".

External links [edit]

  • Virtual Box Official website
  • Oracle
  • Oracle Cloud

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Source: https://en.wikipedia.org/wiki/VirtualBox

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