Paolo Bonzini wrote on 2014-08-07: > Il 07/08/2014 03:31, Zhang, Yang Z ha scritto: >> Let me give an example to see whether my concern is a real problem: >> Guest allocates a vector and set it in IOAPIC entry to deliver >> interrupt. Later it masks the IOAPIC entry(means stop the >> corresponding device) and assign this vector to a MSI device. With >> this patch, even the vector is not used by IOAPIC, but it still set >> eoi exit bitmap unconditionally. The subsequent EOIs to MSI device >> will force vmexit. Could this happen? > > Yes, I guess it could. I'm not sure whether it could on Linux or Windows. > >> I think the right fixing is to check the ISR plus TMR to construct >> the eoi exit bitmap. > > Do you care enough to propose a patch? :) > Sure. I will do it. > Paolo Best regards, Yang -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
