github.com/jlmucb/cloudproxy@v0.0.0-20170830161738-b5aa0b619bc4/Doc/gdbdebugParition.txt (about) 1 If you want to be able to debug a Linux kernel that’s running as 2 a KVM guest, you need to specify the ‘-s’ parameter for the command 3 line of qemu-kvm. The problem is, there’s no (easy) way to do this 4 when you’re using libvirt and virt-manager to manager your virtual 5 machines, instead of using KVM directly. What you need to do is 6 change the XML configuration of the virtual machine so that the 7 ‘-s’ parameter is passed on to qemu-kvm 8 9 10 $ virsh edit f14-test 11 12 Here, f14-test is the name of the VM that is managed via virt-manager. 13 This will bring up the XML configuration of the VM in your editor. 14 The first line of the XML file should be: 15 16 <domain type='kvm'> 17 18 This has to be changed to 19 20 <domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'> 21 22 and you also need to add: 23 24 <qemu:commandline> 25 <qemu:arg value='-s'/> 26 </qemu:commandline> 27 28 under the <domain> level of the XML. After you save and quit the editor, 29 the new configuration will come into effect. When you start the virtual 30 machine, there will be a local TCP port (1234 by default) that can be 31 used as a remote debugging port from gdb. You can connect to this port 32 by using the command 33 34 target remote localhost:1234 35 36 from gdb running on the host machine. 37 38 gdb /usr/src/linux... (guest build area) 39 40