Chapitre 22. Feature support and limitations in RHEL 9 virtualization

This document provides information on feature support and restrictions in Red Hat Enterprise Linux 9 (RHEL 9) virtualization.

22.1. How RHEL virtualization support works

A set of support limitations applies to virtualization in Red Hat Enterprise Linux 9 (RHEL 9). This means that when you use certain features or exceed a certain amount of allocated resources when using virtual machines in RHEL 9, Red Hat will not support these guests unless you have a specific subscription plan.

Features listed in Recommended features in RHEL 9 virtualization have been tested and certified by Red Hat to work with the KVM hypervisor on a RHEL 9 system. Therefore, they are fully supported and recommended for use in virtualization in RHEL 9.

Features listed in Unsupported features in RHEL 9 virtualization may work, but are not supported and not intended for use in RHEL 9. Therefore, Red Hat strongly recommends not using these features in RHEL 9 with KVM.

Resource allocation limits in RHEL 9 virtualization lists the maximum amount of specific resources supported on a KVM guest in RHEL 9. Guests that exceed these limits are not supported by Red Hat.

In addition, unless stated otherwise, all features and solutions used by the documentation for RHEL 9 virtualization are supported. However, some of these have not been completely tested and therefore may not be fully optimized.


Many of these limitations do not apply to other virtualization solutions provided by Red Hat, such as OpenShift Virtualization or Red Hat OpenStack Platform (RHOSP).