On some CPUs, if I run grep vmx /proc/cpuinfo, I can see a vmx flag under the features entry. Will this feature speed up virtual machine software like VirtualBox?

1 Answer 1


The VMX CPU flag indicates hardware support for virtual machines on Intel CPUs (on AMD CPUs, the flag is SVM).

In general, yes, this speeds up virtual machine software that takes advantage of these CPU extensions.

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