Where would I find documentation on the Itanium 2 specific flags to PAL_PROC_SET_FEATURES? Linux arch/ia64/kernel/setup.c seems to enable bit 0x80, but there is no explanatory comment attached. The Itanium 2 microarchitecture manual [1] says that early deferral of speculative memory ops (bypassing VHPT walker) can be enabled via PAL_PROC_SET_FEATURES, but as far as I can see does not specify anywhere which is the appropriate bit... Also, is it true that early deferral only happens with psr.ic=0, as per Table 5-2? What is the motivation for that? Matt [1] i.e. http://download.intel.com/design/Itanium2/manuals/25111003.pdf - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
|