Hello, I'm a newbie of Qemu. sorry about my stupid question. I recently try to figure out the the whole IO process in qemu, I have traced most parts of this process, but I'm still confused about how guest OS notify qemu to handle virtqueue I traced to virtio_queue_host_notifier_read -> event_notifier_test_and_clear, and qemu will read e->rfd, so I assumed that some part of code will write to this descriptor, to notify qemu Unfortunatelly, I have set some breakpoints but noting catched yet. Could someone point it out for me which code write to this descriptor? Or show me the web link about this design?
Thanks a lot! sou
