8.3 检查内核是否开启了KVM
root@prox4nanopi:~# ls -l /dev/kvm
crw-rw---- 1 root kvm 10, 232 Oct 11 04:23 /dev/kvm
root@prox4nanopi:~# dmesg | grep kvm
[ 7.796613] kvm [1]: IPA Size Limit: 40 bits
[ 7.796627] kvm [1]: GICv3: no GICV resource entry
[ 7.796631] kvm [1]: disabling GICv2 emulation
[ 7.796642] kvm [1]: GIC system register CPU interface enabled
[ 7.796755] kvm [1]: vgic interrupt IRQ9
[ 7.796959] kvm [1]: VHE mode initialized successfully
