On Wed, 2014-09-10 at 14:39 -0700, H. Peter Anvin wrote: > On 09/10/2014 02:27 PM, Andy Lutomirski wrote: > >> > >> That's possible, but the only benefit is that we can enable WT on > >> pre-PAT systems, which I do not think anyone cares now... WB & UC work > >> on pre-PAT systems. WC & WT need PAT. I think this requirement is > >> reasonable. > > > > It might end up being a cleanup, though. A whole bunch of > > rarely-exercised if (!pat_enabled) things would go away. > > > > Yes. Don't think of it as PAT vs non-PAT. Think of it as a specific > set of cache types available on different processors. The fact that you > may have to frob an MSR to initialize it is almost trivial in comparison.
Right. Thanks, -Toshi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
