Can anyone guide me as to how the kvm module passes/forwards the IO requests to userspace drivers ? I want to know where in the code do the userspace(QEMU) device-drivers register themselves with the kvm module.
Having looked at the kvm module code I saw that VMexits corresponding to EXIT_REASON_IO_INSTRUCTION are handled by handle_io(), which calls kvm_emulate_pio() and subsequently they retrieve a kvm_io_device from the pio_bus. But where do they come into the pio_bus ? I can't see how the control is transferred to userspace drivers (does virtio play a role here ?) Thanks and Regards, Sukanto -- 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
