This bug is awaiting verification that the linux/5.15.0-74.81 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-jammy' to 'verification-done-jammy'. If the problem still exists, change the tag 'verification-needed-jammy' to 'verification-failed-jammy'.
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-jammy-linux verification-needed-jammy -- 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/2019131 Title: Add PPIN support for Intel EMR cpu Status in linux package in Ubuntu: Invalid Status in linux source package in Jammy: Fix Committed Bug description: SRU Justification [Impact] Intel has introduced support for their new Emerald Rapids CPU. It was backported to Jammy in #lp2015372 and in #lp2015855. The remaining feature needed to fully support EMR is PPIN (the Protected Processor Inventory/Identification Number). This was recently pushed to upstream in 6.4 in commit 36168bc061b4368ad19e82b06a6463c95d3bb9a7. The change is very straightforward, it adds a new entry for EMERALDRAPIDS_X in the cpuids table where cpus that support ppin are listed. The table is then used in `ppin_init`. In Jammy, this implementation is missing. Both Amd and Intel have their own implementation which is doing pretty much the same. Instead of a list of cpus supported, a switch case is used instead in their init functions (amd_detect_ppin and intel_ppin_init). To reduce duplication of code and to help backport smoothly the new addition of EMR, commit 0dcab41d3487acadf64d0667398e032341bd9918 “x86/cpu: Merge Intel and AMD ppin_init() functions” was backported too. Thus commits: - 0dcab41d3487acadf64d0667398e032341bd9918: "x86/cpu: Merge Intel and AMD ppin_init() functions" - 36168bc061b4368ad19e82b06a6463c95d3bb9a7: "x86/cpu: Add Xeon Emerald Rapids to list of CPUs that support PPIN" are needed to support PPIN for EMR. [Testing] Kernel was built on cbd and boot tested on a VM. [Regression potential] Very low, it is a small refactor that removes duplication and it should not affect the functionality. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2019131/+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
