Re: [libvirt-users] How to tell libvirt not to use qemu "accel=kvm" for a FreeBSD guest

On Thu, Nov 14, 2013 at 12:48:51PM +1300, Christian Gagneraud wrote: > On 14/11/13 10:53, Christian Gagneraud wrote: >> Hi there, >> >> I have used qemu to install FreeBSD 9.2 release, and i can boot it fine >> with: >> $ qemu-system-x86_64 -hda images/FreeBSD-9.2-RELEASE-amd64.img >> >> I then made virsh aware of my brand new VM (see attached XML), but when >> i run it via virsh, It hangs after the bootloader whith this message: >> Booting... >> CPU doesn't support long mode >> >> From the log, here is the generated qemu command: >> LC_ALL=C >> PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin >> /usr/bin/qemu-system-x86_64 -name fbsd92-amd64 -S -machine >> pc-i440fx-1.5,accel=kvm,usb=off -m 512 -realtime mlock=off -smp >> 1,sockets=1,cores=1,threads=1 -uuid 11ae165e-b8a2-5083-fb77-37c0042725bf >> -nographic -no-user-config -nodefaults -chardev >> socket,id=charmonitor,path=/var/lib/libvirt/qemu/fbsd92-amd64.monitor,server,nowait >> -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc >> -no-shutdown -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive >> file=/home/christiaga/projects/vms/images/FreeBSD-9.2-RELEASE-amd64.img,if=none,id=drive-ide0-0-0,format=raw >> -device >> ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 >> -netdev tap,fd=24,id=hostnet0 -device >> rtl8139,netdev=hostnet0,id=net0,mac=52:54:00:9c:94:3b,bus=pci.0,addr=0x3 >> -chardev pty,id=charserial0 -device >> isa-serial,chardev=charserial0,id=serial0 -device >> virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x4 >> >> After many attempts, I pinned down the problem. To be able to boot the >> machine with the above command, I had to remove: >> * the accel=kvm in -machine >> * the -S (to "autostart" the VM) >> And change the -net tap,fd=24 to -net user,id=... >> >> So basically, the only thing i would like to tell libvirt is not to use >> accel=kvm, i guess the FreeBSD kernel is missing some feature (is it >> this PAE thing?) >> >> Does anyone how can i tell libvirt to do that? > > Answering myself, replace <domain type='kvm'> with <domain > type='qemu'>, virsh undefine <label>, virsh define <xml-file>, et > voila! FYI you don't need to undefine+define - you can just use 'virsh edit <name>' to change it interactively in vi / emacs / etc

Regards, Daniel