Hardware Assisted Cpu

INTEL VT-x and AMD-V Both are a processor feature which supports Hardware - assisted virtualization (for x86 architecture) for CPU. It gives substantial speed improvements due to the allowance of multiple OS’ to simultaneously share processor resources. A. Intel VT-x a. Initial Name = Vanderpool b. First Processors = Pentium 4 (model 662 and 672) c. Current Processors = All except some Intel Atom d. Method = Extended Page Tables (EPT), then updated to VCMS shadowing (virtual machine control structure) since Haswell. e. CPU FLAG = vmx Intel VT-x can be enabled and disabled via BIOS or UEFI setting. It comes disabled by default. The menu may be under Chipset, Northbridge, A dvanced Chipset Control or Advanced CPU Configuration. The option name may be Intel Virtualization Technology, Intel VT-x, Virtualization Extensions, Vanderpool or something similar.

B. AMD-v a. Initial Name = Pacifica b. First Processors = Athlon 64, Athlon 64 x2, Athlon FX c. Current Processors = AM2, Turion 64 X2, Opteron 2nd Generation 3rd Generation and Phenom I and II. d. Method = Rapid Virtualization Indexing (RVI) (equals to EPT on Intel) e. CPU FLAG = svm AMD-V is always enabled. There is a bug saying it is not available when another hypervisor is using it.

Special Case: Hyper-V reserves hardware feature as long as it’s installed. Uninstall it to use other VM like VirtualBox or VMware with Intel VT-x or AMD-v. A MD-v.

VMWARE The operating system that runs inside a v irtual machine is called the guest operating system. To run 64 bit guest operating systems, the host system must have one of the following processors. - An AMD CPU that has segment-limit support in long mode - An Intel CPU that has VT-x support

HYPER-V minimum requirement is a 1.4 GHz 64 -bit processor with hardware-assisted virtualization. It means that microsft Hyper-V requires either Intel Virtualization Technology (Intel VT) or AMD Virtualization (AMD-V) technology.

VIRTUALBOX All VirtualBox hosts must have the virtualization extensions from AMD (AMD-V) and Intel (VT-x) enabled. https://docs.oracle.com/cd/E26217_01/E26214/html/virtualbox.html

XEN CPU hardware virtualization extensions (Intel VT, AMD-V) are required for running Xen HVM guests (=Windows). Xen PCI passhtru to HVM guests requires hardware IOMMU functionality (Intel VT-d, AMD IOMMU) and support from CPU, BIOS and motherboard c hipset.

KVM Currently, SUSE only supports KVM full virtualization on AMD64/Intel 64 hosts and on z Systems (only as Technology Preview). On the AMD64/Intel 64 architecture, KVM is designed around hardware virtualization features included in AMD* (AMD-V) and Intel* (VT-x) CPUs. It supports virtualization features of chipsets, and PCI devices, such as an I/O Memory Mapping Unit (IOMMU) and Single Root I/O Virtualization (SR-IOV).

LXC Doesn't require any Intel VT or AMD-V

every virtual machine that requires Hardware assisted Virtualization will not work under any circumstances

References: https://en.wikipedia.org/wiki/X86_virtualization http://www.howtogeek.com/213795/how-to-enable-intel-vt-x-in-your-computers-bios-or-uefifirmware/ http://lxc.sourceforge.net/man/lxc.html https://www.suse.com/documentation/sles-12/book_virt/data/sec_kvm_requires_hardware.html http://pubs.vmware.com/workstatIon-9/index.jsp?topic=%2Fcom.vmware.ws.get_started.doc%2FGUID3CF87F1D-FD14-4FBA-A00C-F13D65825CA5.html https://technet.microsoft.com/en-us/library/jj647784.aspx http://wiki.xen.org/wiki/Xen4.0#Requirements_for_running_Xen_4.0