Search results
Results From The WOW.Com Content Network
With some motherboards, users must enable Intel's VT-x feature in the BIOS setup before applications can make use of it. [23] Intel started to include Extended Page Tables (EPT), [24] a technology for page-table virtualization, [25] since the Nehalem architecture, [26] [27] released in 2008.
EPT support is found in Intel's Core i3, Core i5, Core i7 and Core i9 CPUs, among others. [6] It is also found in some newer VIA CPUs. EPT is required in order to launch a logical processor directly in real mode, a feature called "unrestricted guest" in Intel's jargon, and introduced in the Westmere microarchitecture. [7] [8]
Instruction set extensions that have been added to the x86 instruction set in order to support hardware virtualization.These extensions provide instructions for entering and leaving a virtualized execution context and for loading virtual-machine control structures (VMCSs), which hold the state of the guest and host, along with fields which control processor behavior within the virtual machine.
Intel 5-level paging, referred to simply as 5-level paging in Intel documents, is a processor extension for the x86-64 line of processors. [ 1 ] : 11 It extends the size of virtual addresses from 48 bits to 57 bits by adding an additional level to x86-64's multilevel page tables , increasing the addressable virtual memory from 256 TiB to 128 PiB .
Intel VT-x brings back the ability to run virtual 8086 mode from x86-64 long mode, but it has to be done by transitioning the (physical) processor to VMX root mode and launching a logical (virtual) processor itself running in virtual 8086 mode. [14]
The vast majority of Intel server chips of the Xeon E3, Xeon E5, and Xeon E7 product lines support VT-d. The first—and least powerful—Xeon to support VT-d was the E5502 launched Q1'09 with two cores at 1.86 GHz on a 45 nm process. [2] Many or most Xeons subsequent to this support VT-d.
Hyper-V uses the VT-x on Intel or AMD-V on AMD x86 virtualization. Since Hyper-V is a native hypervisor, as long as it is installed, third-party software cannot use VT-x or AMD-V. For instance, the Intel HAXM Android device emulator (used by Android Studio or Microsoft Visual Studio) cannot run while Hyper-V is installed. [43]
Virtual Machine Extensions Enable: see Intel VT-x x86 virtualization. 14: SMXE: Safer Mode Extensions Enable: see Trusted Execution Technology (TXT) 15 [a] (Reserved) — 16: FSGSBASE: FSGSBASE Enable: If set, enables the instructions RDFSBASE, RDGSBASE, WRFSBASE, and WRGSBASE. 17: PCIDE: PCID Enable: If set, enables process-context identifiers ...