On 12/09/2011 05:18 PM, Alexander Graf wrote: > > On 09.12.2011, at 19:19, Scott Wood wrote: > >> Shouldn't you really have interrupts disabled here, as booke does? > > Ah, thanks for the reminder. Yeah, we probably want to disable > interrupts in parallel to checking for signals (basically from one > signal check point to world switch). I'm just not 100% sure how to > easily sync the C and asm code on the first entry though. Doing > local_irq_disable in C and undoing it in asm could become ugly with > lazy interrupt disabling.
Lots of things get ugly with lazy interrupt disabling. :-( There should be other examples of handling the lazy EE stuff in asm code. After you hard-disable, you should just need to poke the right fields in the PACA with the state you plan to end up in after the rfi, similar to exception return. -Scott -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
