** Description changed: Using wily (libvirt 1.2.16-2ubuntu11.15.10.3) in a AMD FX-8350 nested KVM doesn't work, unless in the definition of the vm the cpu is configured with mode='host-passthrough', for other CPUs the manifestation could be different. + + Steps to reproduce: + + L0: wily + + $ uvt-kvm create --memory 2048 --cpu 2 vm-L1 release=wily arch=amd64 # the L1 guest can be trusty too, it doesn't really matter + $ uvt-kvm ssh --insecure vm-L1 + (vm-L1)$ sudo apt-get install cpu-checker + (vm-L1)$ sudo kvm-ok + INFO: Your CPU does not support KVM extensions + KVM acceleration can NOT be used + (vm-L1)$ sudo modprobe kvm-amd + modprobe: ERROR: could not insert 'kvm_amd': Operation not supported + (vm-L1)$ dmesg | grep kvm | tail -n1 + [45890.075592] kvm: no hardware support + + Expected Result: + + kvm-ok says that virtualization is supported + + + Workaround: + + 1) Shutdown the VM (vm-L1) + 2) In the kvm host edit vm-L1 definition (sudo virsh edit vm-L1) and change the cpu definition to: + <cpu mode='host-passthrough'></cpu> + 3) power on the VM + ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: libvirt-bin 1.2.16-2ubuntu11.15.10.3 ProcVersionSignature: Ubuntu 4.2.0-34.39-generic 4.2.8-ckt4 Uname: Linux 4.2.0-34-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.19.1-0ubuntu5 Architecture: amd64 Date: Wed Mar 23 11:20:11 2016 InstallationDate: Installed on 2014-12-06 (472 days ago) InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1) SourcePackage: libvirt UpgradeStatus: Upgraded to wily on 2016-03-08 (14 days ago) modified.conffile..etc.apparmor.d.usr.lib.libvirt.virt.aa.helper: [modified] modified.conffile..etc.libvirt.qemu.conf: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/qemu.conf'] modified.conffile..etc.libvirt.qemu.networks.default.xml: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/qemu/networks/default.xml'] mtime.conffile..etc.apparmor.d.usr.lib.libvirt.virt.aa.helper: 2016-03-14T13:22:07.751461
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1561019 Title: copied cpu flags don't match host cpu To manage notifications about this bug go to: https://bugs.launchpad.net/libvirt/+bug/1561019/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
