In order to use nested virtualization, Fedora Quick Docs[1] advises to activate that feature in the host kernel using modprobe and editing the file /etc/modprobe.d/kvm.conf. The comment in this file provides the same information. Additionally, you are to configure the processor of the VM hosting a nested VM as passthrough. The RHEL 8 documentation [2] provides the same information as various articles on other Web pages. In RHEL 9 documentation I couldn’t find anything about this. Additionally, you are to configure the processor of the VM hosting a nested VM as passthrough. According to my findings these informations seem to be obsolete or in need of supplementation. At least everything works fine without any additional configuration at all (at least if the host processor as well as the processor configured in the VM support virtualization). The Fedora docs team is in the process to check and update Fedora documentation. It would be really helpful if someone with more technical knowledge about that matter than me would provide me with more detailed information und maybe links to current information. Even better if someone familiar with the matter would be willing to review an updated article. -- Peter Boy https://fedoraproject.org/wiki/User:Pboy pboy@xxxxxxxxxxxxxxxxx Timezone: CET (UTC+1) / CEST (UTC+2) Fedora Server Edition Working Group member Fedora docs team contributor and board member Java developer and enthusiast [1] https://docs.fedoraproject.org/en-US/quick-docs/using-nested-virtualization-in-kvm/ [2] https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_and_managing_virtualization/creating-nested-virtual-machines_configuring-and-managing-virtualization _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue