[Bug 2048919] Re: [UBUNTU 23.04] Regression: Ubuntu 23.04/23.10 do not include uvdevice anymore

This bug is awaiting verification that the linux-azure- nvidia/6.8.0-1034.37 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-noble-linux-azure-nvidia' to 'verification-done-noble-linux-azure-nvidia'. If the problem still exists, change the tag 'verification-needed-noble-linux-azure-nvidia' to 'verification-failed-noble-linux-azure-nvidia'. 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: kernel-spammed-noble-linux-azure-nvidia-v2 verification-needed-noble-linux-azure-nvidia -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2048919 Title: [UBUNTU 23.04] Regression: Ubuntu 23.04/23.10 do not include uvdevice anymore Status in Ubuntu on IBM z Systems: Fix Released Status in linux package in Ubuntu: Fix Released Status in linux source package in Lunar: Won't Fix Status in linux source package in Mantic: Fix Released Status in linux source package in Noble: Fix Released Bug description: ---Problem Description--- Regression: uvdevice at /dev/uv not compiled into kernel Machine Type = IBM z15, IBM z16 Contact Information = steffen.eiden@ibm.com ---uname output--- Linux 6.5.0-14-generic #14-Ubuntu SMP Tue Nov 14 14:16:58 UTC 2023 s390x s390x s390x GNU/Linux ---Debugger--- A debugger is not configured ---Additional Hardware Info--- Secure Execution feature code enabled (optional) ---Steps to Reproduce--- # working/ old behavior on a fresh ubuntu 22.10 (and 22.04) LPAR/guest1 (with Secure execution available) > cat /dev/uv /dev/uv > cat /boot/config-$(uname -r) | grep UV_UAPI CONFIG_S390_UV_UAPI=y that's the expected state for Ubuntu. # current/ non expected behavior since Ubuntu 23.04 the following happens: stock kernel non-modified, latest available > cat /dev/uv cat: /dev/uv: No such file or directory COMMENT: this still can happen if the machine has no Secure Execution feature available However, the following should not be the case under any circumstances: > cat /boot/config-$(uname -r) | grep UV_UAPI # CONFIG_S390_UV_UAPI is not set Somehow that configuration got lost between 22.X and 23.X. Maybe, because IIRC that features got back-ported to 22.X # Proposed Solution: change the kernel config to CONFIG_S390_UV_UAPI=y (same as 22.X backport) or CONFIG_S390_UV_UAPI=m (same as upstream) and provide a new kernel binary Stack trace output: n/a System Dump Info: The system is not configured to capture a system dump. Oops output: n/a To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/2048919/+subscriptions