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x86 virtualization is the use of hardware-assisted virtualization capabilities on an x86/x86-64 CPU.. In the late 1990s x86 virtualization was achieved by complex software techniques, necessary to compensate for the processor's lack of hardware-assisted virtualization capabilities while attaining reasonable performance.
CPU [1] Microarch-itecture Cores/ threads Clock speed (base/turbo) Cache Litho-graphy Max. TDP Integrated Graphics Max. memory size EPT Works on QEMU-KVM Xen VMware ESXi Core2 Quad Q9400 [a] [3] Yorkfield: 4 / 4 2.66 GHz: 6 MB L2: 45 nm: 95 W: No [b] Unknown No Unknown Unknown Unknown Core2 Quad CPU Q9650 [a] Yorkfield: 4 / 4 3.0 GHz ...
Hardware virtualization is the virtualization of computers as complete hardware platforms, certain logical abstractions of their componentry, or only the functionality required to run various operating systems. Virtualization emulates the hardware environment of its host architecture, allowing multiple OSes to run unmodified and in isolation.
Intel AMT is the set of management and security features built into vPro PCs that makes it easier for a sys-admin to monitor, maintain, secure, and service PCs. [11] Intel AMT (the management technology) is sometimes mistaken for being the same as Intel vPro (the PC "platform"), because AMT is one of the most visible technologies of an Intel vPro-based PC.
Virtualization began in the 1960s with IBM CP/CMS. [1] The control program CP provided each user with a simulated stand-alone System/360 computer. In hardware virtualization, the host machine is the machine that is used by the virtualization and the guest machine is the virtual machine.
By now, several other software packages such as Virtual PC, VirtualBox, Parallels Workstation and Virtual Iron manage to implement virtualization on x86 hardware. Intel and AMD have introduced features to their x86 processors to enable virtualization in hardware.
KVM (Kernel-based Virtual Machine) is a FreeBSD and Linux kernel module that allows a user space program access to the hardware virtualization features of various processors, with which QEMU can offer virtualization for x86, PowerPC, and S/390 guests. When the target architecture is the same as the host architecture, QEMU can make use of KVM ...
The memory protection is based on the fact that OS running on the CPU (see figure) exclusively controls both the MMU and the IOMMU. The devices are physically unable to circumvent or corrupt configured memory management tables. In virtualization, guest operating systems can use hardware that is not specifically made for virtualization. Higher ...