Glad to hear that a fix is in the pipeline. I don't know anything about KVM, but I saw this the other day:
http://lkml.iu.edu/hypermail/linux/kernel/1408.0/00981.html -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1329434 Title: nested KVM fails on intel hardware - KVM: entry failed, hardware error 0x0 Status in “linux” package in Ubuntu: Fix Released Status in “linux” source package in Trusty: In Progress Bug description: [Impact] Using nested KVM on some hypervisors doesn't work. [Test Case] 1) enable nested KVM: sudo modprobe -r kvm_intel sudo modprobe kvm_intel nested=1 cat /sys/module/kvm_intel/parameters/nested # should say Y 2) generate an L1 guest and then generate an L2 guest inside the L1 guest - ensure L1 has enough memory to boot L2 - if using libvirt you may need to edit the default bridge to use a different subnet than the L1 guest 3) boot the L2 guest 4) L2 guest should boot If not you can see the log: sudo cat /var/log/libvirt/qemu/nested-L2.log <snip> KVM: entry failed, hardware error 0x0 EAX=00000000 EBX=00000000 ECX=00000000 EDX=00000663 ESI=00000000 EDI=00000000 EBP=00000000 ESP=00000000 EIP=0000fff0 EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 00000000 0000ffff 00009300 CS =f000 ffff0000 0000ffff 00009b00 SS =0000 00000000 0000ffff 00009300 DS =0000 00000000 0000ffff 00009300 FS =0000 00000000 0000ffff 00009300 GS =0000 00000000 0000ffff 00009300 LDT=0000 00000000 0000ffff 00008200 TR =0000 00000000 0000ffff 00008b00 GDT= 00000000 0000ffff IDT= 00000000 0000ffff CR0=60000010 CR2=00000000 CR3=00000000 CR4=00000000 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000000 Code=00 66 89 d8 66 e8 02 f7 ff ff 66 83 c4 0c 66 5b 66 5e 66 c3 <ea> 5b e0 00 f0 30 36 2f 32 33 2f 39 39 00 fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 --- AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Jun 13 18:26 seq crw-rw---- 1 root audio 116, 33 Jun 13 18:26 timer AplayDevices: Error: [Errno 2] No such file or directory ApportVersion: 2.14.1-0ubuntu3.2 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: DistroRelease: Ubuntu 14.04 IwConfig: Error: [Errno 2] No such file or directory MachineType: Intel Corporation S2600WTT Package: linux (not installed) PciMultimedia: ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 VESA VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=b5d11a1d-c48f-4abf-a622-d1efe52fe97c ro ProcVersionSignature: User Name 3.13.0-24.46-generic 3.13.9 RelatedPackageVersions: linux-restricted-modules-3.13.0-24-generic N/A linux-backports-modules-3.13.0-24-generic N/A linux-firmware 1.127.2 RfKill: Error: [Errno 2] No such file or directory Tags: trusty uec-images Uname: Linux 3.13.0-24-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm audio cdrom dialout dip floppy libvirtd netdev plugdev sudo video _MarkForUpload: True dmi.bios.date: 05/06/2014 dmi.bios.vendor: Intel Corporation dmi.bios.version: GRNDSDP1.86B.0030.R03.1405061547 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: S2600WTT dmi.board.vendor: Intel Corporation dmi.board.version: H30334-201 dmi.chassis.asset.tag: .................... dmi.chassis.type: 23 dmi.chassis.vendor: ............................... dmi.chassis.version: .................. dmi.modalias: dmi:bvnIntelCorporation:bvrGRNDSDP1.86B.0030.R03.1405061547:bd05/06/2014:svnIntelCorporation:pnS2600WTT:pvr....................:rvnIntelCorporation:rnS2600WTT:rvrH30334-201:cvn...............................:ct23:cvr..................: dmi.product.name: S2600WTT dmi.product.version: .................... dmi.sys.vendor: Intel Corporation To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1329434/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
