Hi All, a) As per GIC-400 all Physical interrupts trap into hypervisor b) Hypervisor does ACK, programs Virtual GIC list registers (with PhysIRQ:VIRQ) and does a world switch. c) GIC CPU I/f interrupts Guest with the VIRQ d) Guest does a ACK and EOI to GIC cpu i/f e) Hypervisor gets a maintenance interrupt when Guest Does an EOI f) Hypervisor then clears the Physical Interrupt
So for 1 interrupt there are so many context switches ? Is the sequence right. If I am missing anything please let me know .. Also, If a device is private to a guest, so many context switches would reduce the performance if the device interrupts a lot. My question is that a) Is the above flow correct ? b) Is this the only flow or there exists some optimisations Thanks and Regards -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
