Thanks for the steps. As you noted, I can reproduce on xenial w/ the 4.8 hwe kernel, but not with the GA 4.4. I'm marking the kernel packages as affected because the host kernel shouldn't hang, even if the guest does something bad (e.g. if edk2 is buggy).
-- 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/1673564 Title: ThunderX: soft lockup on 4.8+ kernels when running qemu-efi with vhost=on Status in edk2 package in Ubuntu: Confirmed Status in linux package in Ubuntu: Confirmed Bug description: This is a followup of an earlier thread/bug that we have narrowed down to an incompatibility/issue with vhost support in qemu-efi. Without vhost=on qemu seems to be working fine. I have tested several edk2 firmwares: - xenial - zesty - Fedora: ftp://195.220.108.108/linux/fedora-secondary/development/rawhide/Everything/aarch64/os/Packages/e/edk2-aarch64-20170209git296153c5-2.fc26.noarch.rpm I have also tested with different guests: - cirros: https://download.cirros-cloud.net/daily/20161201/cirros-d161201-aarch64-disk.img - ubuntu xenial: https://cloud-images.ubuntu.com/xenial/current/xenial-server-cloudimg-arm64-uefi1.img The test steps are simple enough. A tap device is needed, qemu-kvm, qemu-efi need to be installed. The UEFI iamge is run as shown in the launch.sh script, the tap device is used in vhost=on mode. Also note that the QEMU_EFI.fd binary needs to be padded up to 64M: dd if=/dev/zero of=AAVMF_CODE.fd bs=1M count=64 dd if=QEMU_EFI.fd of=AAVMF_CODE.fd conv=notrunc The result was always the same, the node crashing with soft-lockups when qemu was attempting to boot the kernel. I will attach all the relevant information shortly. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/edk2/+bug/1673564/+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
