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

I found that scai's answer doesn't work on my AMD Ryzen systems.

This however works really well for me, even on Intel:

if systool -m kvm_amd -v &> /dev/null || systool -m kvm_intel -v &> /dev/null ; then
    echo "AMD-V / VT-X is enabled in the BIOS/UEFI."
else
    echo "AMD-V / VT-X is not enabled in the BIOS/UEFI"
fi

(systool is found in the sysfsutils package on most distros.)

For Intel's VT-D / AMD's IOMMU, I came up with this solution:

if compgen -G "/sys/kernel/iommu_groups/*/devices/*" > /dev/null; then
    echo "AMD's IOMMU / Intel's VT-D is enabled in the BIOS/UEFI."
else
    echo "AMD's IOMMU / Intel's VT-D is not enabled in the BIOS/UEFI"
fi

(It even worked for me if the iommu kernel parameters are not set.)