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

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!