> From: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > Sent: Thursday, December 16, 2021 10:13 PM > > > > Yes, this is the 3rd open that I asked in another reply. The only restriction > > with this approach is that the sync cost is added also for legacy OS which > > doesn't touch xfd at all. > > You still can make that conditional on the guest XCR0. If guest never > enables the extended bit then neither the #NM trap nor the XFD sync > are required. > > But yes, there are too many moving parts here :) > Yes. Many moving parts but in general it's getting cleaner and simplified. 😊 We just sent out v2 to hopefully lock down already-closed opens. Based on that we can see what remains to be further solved. And really appreciate all the suggestions from you and Paolo! Thanks Kevin
