On 1/14/2016 3:49 PM, Yuanhan Liu wrote:

On Thu, Jan 14, 2016 at 07:47:17AM +0000, Xie, Huawei wrote:

quoted

On 1/12/2016 2:58 PM, Yuanhan Liu wrote:

quoted

Modern (v1.0) virtio pci device defines several pci capabilities.

[snip]

quoted

+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