For historical reasons, most systems which ship have the virtualization flag turned off. If you aren’t expecting this, and try to install KVM in a Linux system, you can get unusual errors which don’t necessarily indicate the problem.
This script performs a few simple tests to see if virtualization is active or not. I can’t guarantee that it is complete, but it works on the systems I’ve tested it on. Please use it, and if you find an exception, please let me know so I can update it.
cpuinfo=`egrep '^flags.*(vmx|svm)' /proc/cpuinfo`
if [ "$cpuinfo" = "" ]; then echo "There doesn't appear to be any hardware support for virtualization" exit fi
hardware=`dmesg | grep kvm | grep -i 'no hardware support'` bios=`dmesg | grep kvm | grep -i 'disabled by bios'`
if [ "$hardware" != "" ]; then echo "No hardware support for KVM" exit fi if [ "$bios" != "" ]; then echo "KVM disabled by bios" exit fi