libvirt 3.4.0
centos 7.4


Hi:

    I want usr libvrit create vm to debug linux kernel. Previous , I usr qemu 
cmd(-gdb tcp::1234) directly. When I search on Internet, I found I can usr 
libvrt xml configure kgdb.
<qemu:commandline>
        <qemu:arg value='-gdb'/>
        <qemu:arg value='tcp::1234'/>
  </qemu:commandline>
But configure xml usr kgdb is differnet on kernel boot. usr qemu cmd, before I 
connect kernel usr gdb , the kernel still not boot, When I usr gdb connect the 
vm and put continue cmd on gdb, the kernel will start boot. But I usr libvirt 
xml configure kgdb, the kernel not stop, I want known that have some way I can 
use libvirt xml configure kgdb let kernel stop boot before I put continue on 
gdb?

Thanks
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