Note: This bug is displayed in read-only format because
the product is no longer active in Red Hat Bugzilla.
RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.
I think if virt-host-validate shows "Check firmware settings to enable VT-x/AMD-V", it will be good.
Comment 2Jaroslav Suchanek
2018-11-20 14:02:27 UTC
(In reply to Kazuo Moriwaka from comment #1)
> I think if virt-host-validate shows "Check firmware settings to enable
> VT-x/AMD-V", it will be good.
I guess the virt-host-validate does not have downstream hacks, so if there is missing VT-X/AMD-V cpu feature it just warns about it even though QEMU's TCG mode should not be supported in RHEL. Jirka, any idea?
That's correct, virt-host-validate does not contain any downstream hacks.
However, the bug description is not correct. While KVM will not be usable, one
can still create QEMU virtual machines using TCG (domain type "qemu" in
libvirt vs. "kvm"). And in that case, performance will indeed be significantly
limited. I believe such usage is also officially unsupported, but I don't
really see anything wrong with what virt-host-validate says.
I agree with virt-host-validate's message is not wrong as general purpose diagnose message.
I suggest adding a note or sentence after procedure 3 to complement virt-host-validate's message. Such as "To avoid unpractical low performance, RHEL QEMU will fail to start if CPU's hardware virtualization support is missing."
There isn't a clear statement about the requirements of CPU's HVM support in this document. It's not a problem (all recent CPU has HVM support), but adding this note would decrease # of support cases from nested virtualization users.
Thanks,