Qubes install says my AMD ASRock B550 setup does not support virtualization (but it does) and have tripled checked all virt options (all turned on)

[enmus]

Maybe you can find this related.

Smt isn’t off by default although smt=off is set in the grub

Continuing the discussion from [SOLVED] Unable to passthrough audio device to sys-audio: Oh damn, another hardware vuln that impact perfs … Funny, by default RedHat does not use “nosmt” to not disable HyperThreading ! But on Qubes it seems required to protect from rogue domains … If it’s not documented, create or edit the doc, really ! Maybe in a GRUB page containing all the possible options ? Or in a page “Mitigating the know vulns” ? Well I don’t know why it’s not the 1st § of How to use …