On 17/01/2018 08:40, Jan Beulich wrote: >>>> On 16.01.18 at 22:11, <andrew.coop...@citrix.com> wrote: >> An alternative to the current levelling logic would be to treat STIBP as >> a Special Bit (in CPUID terms, like OSXSAVE/etc) and unconditionally set >> it equal to IBRS, irrespective of the toolstack setting. That way, >> migration between HT and non-HT hardware is safe and a VM which chooses >> to use STIBP will work even on non-HT hardware which simply ignores the >> request. > Wouldn't that overall result in simpler code anyway?
Much, except its only become an option since yesterday. ~Andrew _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
