virsh capabilities does not include qemu

Hi, I am new to Libvirt and Qemu.I have installed Libvirt 7.1.0 and qemu-kvm 4.2.0. I configured and built libvirt based on instructions from https://libvirt.org/compiling.html. But when i tried to create a VM using virsh it shows the following error: # virsh create /home/abc.xml error: Failed to create domain from /home/abc.xml error: invalid argument: could not find capabilities for arch=x86_64 domaintype=kvm When i check the hypervisor capabilities ,it doest show qemu in guest domain type. # virsh capabilities .................................... ..................................... </host> <guest> <os_type>exe</os_type> <arch name='x86_64'> <wordsize>64</wordsize> <emulator>/usr/local/libexec/libvirt_lxc</emulator> <domain type='lxc'/> </arch> </guest> <guest> <os_type>exe</os_type> <arch name='i686'> <wordsize>32</wordsize> <emulator>/usr/local/libexec/libvirt_lxc</emulator> <domain type='lxc'/> </arch> </guest> </capabilities> I have restarted libvirt to get the qemu support,but it is not shown in capabilities list.What will be the problem? Thanks for the help in advance....