** Description changed: [Impact] * new models of s390x chips added new facilities which will help performant and feature-ful execution of guests on those new systems. [Test Case] - #1 against regressions we should run workloads as we ahve run them + #1 against regressions we should run workloads as we have run them before, e.g. the regression test set that the server team usually runs - obviously none of these should be affected. #2 for the actual z14 GA2 and the z15 cpu model one needs the new HW to - test these types. In this case IBM will do those verifications as they + test these types. In this case IBM will do those verification as they have such Hardware available. On that guests with those new types should be used and tested. On older hardware they will fail to start lacking some facilities which are part of the new CPU models. [Regression Potential] * The changes on s390x itself are mostly isolated Backports required to adapt a few things for Bionic and in general needed updated headers. If in review we missed something there this might affect other workloads and IMHO is the regression potential to keep in mind. [Other Info] * This SRU is for the defined other safe cases "For Long Term Support releases we regularly want to enable new hardware. Such changes are appropriate provided that we can ensure not to affect upgrades on existing hardware. For example, modaliases of newly introduced drivers must not overlap with previously shipped drivers. This also includes updating hardware description data such as udev's keymaps, media- player-info, mobile broadband vendors, or PCI vendor/product list updates." from: https://wiki.ubuntu.com/StableReleaseUpdates#Other_safe_cases In this case the new facilities and modes will and can only be used on those newer machines. Fortunately the changes to those definitions in qemu are isolated to CPU models and should not affect other (already existing) cpu models. Therefore we can add it * This is very similar to https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1780773 where we added the z14 ZR 1 type, just this time the new types change more which means more code, but also more benefit to use them. --- Feature request to be applied to Ubuntu 18.04 - qemu. The commit information is already provided within https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1830238 + https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1836066 Once this feature is accepted, all required information for integration will be provided by IBM (qemu 4.1 down to 2.11) FYI: related kernel part in https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1836153
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1836154 Title: [18.04 FEAT] zKVM: Add hardware CPU Model - qemu part To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1836154/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
