On 1/14/2016 3:49 PM, Yuanhan Liu wrote: > On Thu, Jan 14, 2016 at 07:47:17AM +0000, Xie, Huawei wrote: >> On 1/12/2016 2:58 PM, Yuanhan Liu wrote: >>> Modern (v1.0) virtio pci device defines several pci capabilities. >> [snip] >>> +static void >>> +modern_notify_queue(struct virtio_hw *hw __rte_unused, struct virtqueue >>> *vq) >>> +{ >>> + modern_write16(1, vq->notify_addr); >>> +} >> Does virtio 1.0 only supports MMIO? MMIO has long VMEXIT latency than >> PORT IO. > Virtio 1.0 supports three transport layer, including MMIO and PCI. And > we use PCI only in our pmd driver.
I don't mean that MMIO but use memory mapped IO for configuration. > > --yliu >