Patchset sent to KTML: - https://lists.ubuntu.com/archives/kernel-team/2025-September/162711.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/2121811 Title: [UBUNTU 22.04] Support CPU-MF Counters for new IBM z17 - kernel part Status in Ubuntu on IBM z Systems: In Progress Status in linux package in Ubuntu: Invalid Status in linux source package in Jammy: In Progress Bug description: [ Impact ] s390/cpumf: Update CPU Measurement facility extended counter set support Update CPU Measurement counter facility support for the extended counter set for machine types 9175 and 9176. [ Fix ] Backport the following patch from upstream: - df194f57de71 s390/cpumf: Update CPU Measurement facility extended counter set support [ Test Plan ] Boot a z17 instance and run the command: ls -l /sys/devices/cpum_cf/events | wc -l The output must be 160. [ Where Problems Could Occur ] The fix modifies CPUMF event registration for IBM z17. A bug in this patch may cause incorrect event exposure on unsupported hardware, leading to invalid perf measurements, sysfs inconsistencies, or kernel warnings due to misconfigured or non-existent counters. --- Description: Support for CPU-MF counters of new IBM z17 in kernel, s390-tools, perf (kernel) and libpfm4. This bug covers the kernel part of the item which requires the following two commits: f10933cbd2df ("s390/cpum_cf: make crypto counters upward compatible across machine types") df194f57de71 ("s390/cpumf: Update CPU Measurement facility extended counter set support") To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/2121811/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
