[Bug 1494602] [NEW] qemu-system-x86 nested virtualisation is broken on AMD system
Public bug reported: I am reporting this bug against qemu-system-x86=1:2.2+dfsg-5expubuntu9.3~cloud0 in the Ubuntu cloud archive. # lsb_release -rd Description:Ubuntu 14.04.3 LTS Release:14.04 # apt-cache policy qemu-system-x86 qemu-system-x86: Installed: 1:2.3+dfsg-5ubuntu4~cloud0 Candidate: 1:2.3+dfsg-5ubuntu4~cloud0 What is happening: Version 1:2.2+dfsg-5expubuntu9.3~cloud0 of qemu-system and qemu-system-x86_64 seems to be dropping the svm (AMD nested virtualization) flag from virtual machines, despite it being specified in the CPU type. So nested virtualisation has stoppped working. What I expect to happen: svm CPU flag to be passed through to guests. Version 1:2.3+dfsg-5ubuntu4~cloud0 also drops the svm flag. Version 2.0.0+dfsg-2ubuntu1.18 passes the CPU flag through fine. This has been tested with libvirt-bin version 1.2.12-0ubuntu14. The processor is Version: AMD Opteron(TM) Processor 6238. # cat /sys/module/kvm_amd/parameters/nested 1 # modinfo kvm_amd | grep nested parm: nested:int The qemu command line includes the following cpu argument:: -cpu Opteron_G4,+perfctr_nb,+perfctr_core,+topoext,+nodeid_msr,+lwp,+wdt,+skinit,+ibs,+osvw,+cr8legacy,+extapic,+c mp_legacy,+fxsr_opt,+mmxext,+osxsave,+monitor,+ht,+vme ** Affects: qemu (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1494602 Title: qemu-system-x86 nested virtualisation is broken on AMD system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1494602/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1494602] [NEW] qemu-system-x86 nested virtualisation is broken on AMD system
Public bug reported: I am reporting this bug against qemu-system-x86=1:2.2+dfsg-5expubuntu9.3~cloud0 in the Ubuntu cloud archive. # lsb_release -rd Description:Ubuntu 14.04.3 LTS Release:14.04 # apt-cache policy qemu-system-x86 qemu-system-x86: Installed: 1:2.3+dfsg-5ubuntu4~cloud0 Candidate: 1:2.3+dfsg-5ubuntu4~cloud0 What is happening: Version 1:2.2+dfsg-5expubuntu9.3~cloud0 of qemu-system and qemu-system-x86_64 seems to be dropping the svm (AMD nested virtualization) flag from virtual machines, despite it being specified in the CPU type. So nested virtualisation has stoppped working. What I expect to happen: svm CPU flag to be passed through to guests. Version 1:2.3+dfsg-5ubuntu4~cloud0 also drops the svm flag. Version 2.0.0+dfsg-2ubuntu1.18 passes the CPU flag through fine. This has been tested with libvirt-bin version 1.2.12-0ubuntu14. The processor is Version: AMD Opteron(TM) Processor 6238. # cat /sys/module/kvm_amd/parameters/nested 1 # modinfo kvm_amd | grep nested parm: nested:int The qemu command line includes the following cpu argument:: -cpu Opteron_G4,+perfctr_nb,+perfctr_core,+topoext,+nodeid_msr,+lwp,+wdt,+skinit,+ibs,+osvw,+cr8legacy,+extapic,+c mp_legacy,+fxsr_opt,+mmxext,+osxsave,+monitor,+ht,+vme ** Affects: qemu (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu in Ubuntu. https://bugs.launchpad.net/bugs/1494602 Title: qemu-system-x86 nested virtualisation is broken on AMD system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1494602/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
