Messages in this thread | | | Date | Tue, 17 Mar 2009 16:55:55 +0100 | From | Andi Kleen <> | Subject | Re: [Xen-devel] [PATCH 10/24] xen: mask XSAVE from cpuid |
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> well the choice fundamentally is > 1) Have correct applications work, even though you might not always get > all new features that the hardware could have done.. at the expense > that someone who wants to do horrible things can > 2) Have all latest features always there, but break correctly written > apps/oses every 2 years.
I'm not sure there will be that much breakage. It seems more like a theoretical danger.
> > I'd go for option 1 any day of the week, hands down. > Esp if the "cpu cloaking" kind of things really disable the > instructions... but even without.
With cpu cloaking and disabling unknown instructions it would be fine to go conservative. But that's not what is being proposed.
-Andi
-- ak@linux.intel.com -- Speaking for myself only.
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