hi anhdenday, You can modify the config field virt_type as kvm. Actually, hypervisor in horizon used libvirt API interface virConnectGetType(). Get the name of the Hypervisor driver used. This is merely the driver name; for example, both KVM and QEMU guests are serviced by the driver for the qemu:// URI, so a return of "QEMU" does not indicate whether KVM acceleration is present. For more details about the hypervisor, use virConnectGetCapabilities().

Regards.