– Ubuntu 18.04.1 LTS with service and Ubuntu 16.04.6 LTS with service. – The support statements for z15 also coverthe KVM hypervisor on distribution levels  that have KVM support. For more information about the minimum required and recommended distribution levels,  see the IBM Z website. 6.8.3 Crypto Express7S support of greater than 16 domains  The following prerequisites must be met to support more than 16 domains: 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 for guest use GLYPH<SM590000> z/VM V6.4 with PTFs for guest use GLYPH<SM590000> z/VSE V6.2 with PTFs 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. – Ubuntu 18.04.1 LTS with service and Ubuntu 16.04.6 LTS with service. – The support statements for z15 also coverthe KVM hypervisor on distribution levels  that have KVM support. For more information about the minimum required and recommended distribution levels, see  the IBM Z website. For more information about the software support levels for cryptographic functions, see  Chapter 7, “Operating system support” on page 255. Chapter 6. Cryptographic features  253