On Sat, 2013-12-07 at 10:39 +0100, christophe leroy wrote: > Function setup_initial_memory_limit() in mm/init_32.c defines the > limits > based on the parameters given by the bootloader. > As far as I know, the 8xx doesn't do speculative access just because > an area is loaded in a TLB Entry.
Speculative accesses are ... speculative :-) The address used for such an access can be anything really. So yes, architecturally, powerpc processors can access *anything* speculatively just because there's a valid non-garded translation. Whether the 8xx does it at all, I don't know. 44x originally did but that was so buggy that we had to force G on all mappings (until later versions of the core just burned the feature out). Pretty much all other powerpc's do it. Cheers, Ben. -- 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/
