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? :) Paolo -- 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
