Re: XSA-273 - security impact on Qubes?

[Rob Fisher]

Thanks for your feedback, and especially thanks to the Qubes Security
Team for getting this turned around so quickly and comprehensively.
I particularly like the design decision to disable SMT (HT) in Xen
irrespective of BIOS config. As BIOSs can be buggy on some HW, or simply
not provide the user with a choice to disable certain features like SMT.