From mboxrd@z Thu Jan  1 00:00:00 1970
From: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Subject: Re: [PATCH v2 7/7] virtio: add 1.0 support
Date: Thu, 14 Jan 2016 15:58:59 +0800
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Cc: "dev@dpdk.org" <dev@dpdk.org>, "Michael S. Tsirkin" <mst@redhat.com>
To: "Xie, Huawei" <huawei.xie@intel.com>
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On Thu, Jan 14, 2016 at 07:51:08AM +0000, Xie, Huawei wrote:
> 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.

Then, yes.

	--yliu