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HyperSwap support is enhanced to allow RESERVE processing. When a system runs a request to swap to secondary devices that are managed by HyperSwap, z/OS detects when RESERVEs are held and ensures that the devices that are swapped also hold the RESERVE. This enhancement is provided with collaboration from z/OS, GDPS HyperSwap, and CSM HyperSwap. 

## 7.6 z/VM migration considerations 

IBM z14 supports z/VM 7.1 and z/VM 6.4. z/VM is moving to continuous delivery model. For more information, see this web page. 

## 7.6.1 z/VM 7.1 

z/VM 7.1 can be installed directly on IBM z14. z/VM V7R1 includes the following new features: 

GLYPH<SM590000> Single System Image and Live Guest Relocation included in the base. In z/VM 6.4, this feature was the VMSSI-priced feature. 

GLYPH<SM590000> Enhances the dump process to reduce the time that is required to create and process dumps. 

GLYPH<SM590000> Upgrades to a new Architecture Level Set. This feature requires an IBM zEnterprise EC12 or BC12, or later. 

GLYPH<SM590000> Provides the base for additional functionality to be delivered as service Small Program Enhancements (SPEs) after general availability. 

z/VM 7.1 includes SPEs shipped for z/VM 6.4, including Virtual Switch Enhanced Load Balancing, DS8K z-Thin Provisioning, and Encrypted Paging. 

## 7.6.2 z/VM V6.4 

z/VM V6.4 can be installed directly on a z14 server with an image that is obtained from IBM after August 25, 2017. The PTF for APAR VM65942 must be applied immediately after installing z/VM V6.4 and before configuring any part of the new z/VM system. 

A z/VM Release Status Summary for supported z/VM versions is listed in Table 7-17. 

<img src='content_image/981872.jpg'>

a. Older z/VM versions (6.3, 6.2, 5.4 are End Of Support) 

