This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed- trusty' to 'verification-done-trusty'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-trusty -- 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: Fix Committed Bug description: [Impact] Using nested KVM on some hypervisors doesn't work. [Test Case] A script to make this easier is posted here: https://gist.github.com/arges/9d21c6da03a8c10d3980 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 [Fix] These three upstream patches needed to be backported to 3.13: * 533558bcb69ef28aff81b6ae9acda8943575319f - This provides necessary code changes to make backporting easier. However vmx_leave_nested function was not yet added, so that function modification was dropped. * b6b8a1451fc40412c57d10c94b62e22acab28f94 - This patch is necessary in order to ensure that the L1 guest doesn't crash with just 696dfd95 applied. I had to remove mpx mentions from the cherry-pick as that feature hasn't been added yet. * 696dfd95ba9838327a7013e5988ff3ba60dcc8c8 - This patch fixes the issue and was the result of the bisection. The APIC virtualization features need to be disabled as they cause L2 guests to not boot depending on the CPU. -- If the L2 guest doesn't boot 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
