[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] trying to understand interrupts from xen->guest
On Fri, 25 Jun 2004, Keir Fraser wrote: > > hmm maybe it is calling back to 0 ... that would explain my call frame > > completely. > > Not sure what you mean here. Yes, you could get an interrupt on > event-channel 0 -- at start of day no event channels are masked, but > also none are bound to event sources. The only exception is evtchn 0, > which is statically bound to VIRQ_MISDIRECT. This is a 'dumping > ground' for any VIRQs that occur that you have not yet bound to an > event channel. no, what I mean is, I get a trap which to plan 9 exception handlers looks like a page fault and the PC is 0. This could be the variable-sized xen stack frame confusing plan 9 trap again, however. I am worried that xen is calling back to that PC somehow. Seems unlikely but it would explain the stack frame I have. HOWEVER ... seems that what you are telling me is that I should expect an irq on VIRQ_MISDIRECT, which makes a lot of sense and explains the linux code I see. So I'll look at that too. ron ------------------------------------------------------- This SF.Net email sponsored by Black Hat Briefings & Training. Attend Black Hat Briefings & Training, Las Vegas July 24-29 - digital self defense, top technical experts, no vendor pitches, unmatched networking opportunities. Visit www.blackhat.com _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/xen-devel
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