On 05/11/2013 06:26:21 PM, Kevin Hao wrote:
In the external proxy facility mode, the interrupt is automatically acknowledged with the same effect as reading the IACK register. So this makes external input interrupt more like edge sensitive. That means we can leave the irq hard enabled when it occurs with irq soft disabled just like the dec and doorbell interrupt. But the External Proxy Register(EPR) is only considered valid from the time that the external interrupt occurs until MSR[EE] is set to 1. So we have to save the EPR before irq hard enabled.
Is it really worth it? Are you having a real-world problem with profilability as things stand, that this resolves? We should already be no worse off than non-external-proxy hardware...
-Scott _______________________________________________ Linuxppc-dev mailing list [email protected] https://lists.ozlabs.org/listinfo/linuxppc-dev
