Il 23/08/2012 05:35, Shesha Sreenivasamurthy ha scritto: > Hi, > I am trying to generate eventfd upon a IO write from the guest, say it > is at offset IO_NOTIFY_REG (0x10). When the guest writes to this > register, I get control to QEMU's to the write function associated in > mypci_iomem_ops. However, instead of this I would like to register an > eventfd. > > To achieve that, first I tried: > memory_region_add_eventfd(&mypci->bar_iomem, IO_NOTIFY_REG, 4, > true, 1, fd); This is the right way. You can look (in the git tree of QEMU) at hw/ivshmem.c, which is the simplest user of the eventfd API. Note that recently the API was changed to accept an EventNotifier rather than the raw eventfd. 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
