ThomasChung/KVM

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Personal Note: KVM

KVM (for Kernel-based Virtual Machine) is a full virtualization solution for Linux on x86 hardware containing virtualization extensions (Intel VT or AMD-V). It consists of a loadable kernel module, kvm.ko, that provides the core virtualization infrastructure and a processor specific module, kvm-intel.ko or kvm-amd.ko. KVM also requires a modified QEMU although work is underway to get the required changes upstream.

Install KVM


Check VMX

  • KVM is full virtualization. To run fully-virtualized guests, it requires a CPU with VMX extension for Intel Processors.
$ cat /proc/cpuinfo  | grep vmx

flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi
mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc pni monitor ds_cpl '''vmx''' est tm2 ssse3 cx16 xtpr lahf_lm

flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi
mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc pni monitor ds_cpl '''vmx''' est tm2 ssse3 cx16 xtpr lahf_m

Check BIOS

  • On some Intel systems, virtualization support needs to be enabled in the BIOS. Please ensure that this has been done before proceeding.

Check KVM

  • To load kvm-intel,
$ su -c "/sbin/modprobe kvm-intel"
  • To see if kvm-intel module loaded,
$ /sbin/lsmod | grep kvm
kvm_intel              21965  0
kvm                    62885  1 kvm_intel

Screenshots

References