6.8 Cryptographic operating system support for z15 6.8.1 Crypto Express7S Toleration 6.8.2 Crypto Express7S support of VFPE  The following section gives an overview of the operating systems requirements in relation to  cryptographic elements. Crypto Express7S (0898/0899) Toleration treats Crypto Express7S cryptographic  coprocessors and accelerators as Crypto Express5 coprocessors and accelerators. The  following minimum prerequisites must be met: The following minimum prerequisites must be met to use this element: GLYPH<SM590000> z/OS V2.4$^{8}$; certain functions require WD19 (HCR77D1) GLYPH<SM590000> z/OS V2.3 with PTFs GLYPH<SM590000> z/OS V2.2 with PTFs GLYPH<SM590000> z/OS V2.1 with PTFs GLYPH<SM590000> z/VM V7.1 for guest use GLYPH<SM590000> z/VM V6.4 with PTFs for guest use GLYPH<SM590000> z/VSE V6.2 with PTFs GLYPH<SM590000> z/TPF V1.1 with PTFs GLYPH<SM590000> Linux on Z: IBM is working with its Linux distribution partners to provide support by way of  maintenance or future releases for the following distributions: – SUSE Linux Enterprise Server 12 and SLES 11 – Red Hat Enterprise Linux (RHEL) 7 and Red Hat Enterprise Linux 6 – Ubuntu 16.04 LTS (or higher) GLYPH<SM590000> The KVM hypervisor, which is offered with SLES 12 SP2 with service, RHEL 7.5 with  kernel-alt package (kernel 4.14) and Ubuntu 16.04 LTS with service, and Ubuntu 18.04  LTS with service Linux distributions. For more information about minimal and  recommended distribution levels, see the Tested platforms for Linux web page of the IBM  IT infrastructure website. GLYPH<SM590000> z/OS V2.4$^{8}$ with PTFs GLYPH<SM590000> z/OS V2.3 with PTFs GLYPH<SM590000> z/OS V2.2 with the Enhanced Cryptographic Support for z/OS V1.13-V2.2 web deliverable  installed GLYPH<SM590000> z/VM V7.1 with PTFs for guest use GLYPH<SM590000> z/VM V6.4 with PTFs for guest use GLYPH<SM590000> Linux on IBM Z: – SUSE SLES 15 SP1 with service, SUSE SL ES 12 SP4 with service, and SUSE SLES  11 SP4 with service. – Red Hat RHEL 8.0 with service, Red Hat  RHEL 7.7 with service, and Red Hat RHEL  6.10 with service. 252  IBM z15 (8561) Technical Guide 8 For more information, see  https://www.ibm.com/downloads/cas/US-ENUS219-013-CA/name/ENUS219-013.PDF