Most of my clients are z/OS customers, but quite a few of them also run z/VM and Linux on their mainframes. When planning for an upgrade to a new processor, be sure you don’t overlook z/VM and Linux in your migration planning. It’s important to be sure that all of the installed operating systems are at a version and release level that supports the incoming machine type as well as any new functions that are release dependent.
(Part of the systems assurance process is to identify the version and release level of all installed operating systems and compare that to the required versions and releases for the new processor, so this topic should be covered during the pre-install Technical and Delivery Assessment or TDA. But, that’s really late in the planning process in most cases, often just prior to shipment of the new machine. Sort of late to discover you need an OS upgrade, right? Check it out early.)
Here is a link to review z/VM support for Z System servers. (Scroll down a bit when you get there.)
Since Linux is not an IBM product, you must seek guidance from your Linux vendor on recommended release levels. IBM does have a link that provides information on which environments have been tested.
Also, though there’s nothing imminent, here is a link to the “end of service” dates for IBM’s z/VM operating system.