错误
https://ask.csdn.net/questions/7758634
Error: Failure in validating virtualization capabilities
QEMU: Checking for hardwar virtualization FAIL (Only emulated CPUs are available, performance will be significantly limited)
原因
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_and_managing_virtualization/getting-started-with-virtualization-in-rhel-8_configuring-and-managing-virtualization
这里有说，如果主机的CPU不支持KVM的虚拟化，就会出现这个错误。这个错误虽然提示说有性能影响，其实他的具体结果却是虚拟机起不来。
If KVM virtualization is not supported by your host CPU, virt-host