check if VT-x is activated without having to reboot in Linux?

Question

I have a laptop with Intel Core i5 M 450 @ 2.40GHz which apparently has VT-x but not VT-d. I have Ubuntu 12.04 32bit but would like to have a virtual 64bit terminal-based Li

Answer 1

A simple approach to confirm that Vt-D is enabled in the BIOS is through the Linux system. If the VT-D is enable in the BIOS and Iommu=on in the grub.cfg then the below folder structure is created automatically to hold the Virtual devices.

/sys/kernel/iommu_groups/0/devices/0000:00:00.0

Whereas if either one of the options VT-D or Iommu is not configured/enabled then the above mentioned folder structure is not created. This behavior is confirmed in CentOS 7.4 and Ubuntu. Hopefully this behavior is similar for other operating systems as well but this would need to be confirmed.