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Subject: Re: [virtio-comment] [PATCH requirements 1/7] net-features: Add requirements document for release 1.4
On Wed, Jun 07, 2023 at 08:39:11PM +0000, Parav Pandit wrote: > > > > From: Michael S. Tsirkin <mst@redhat.com> > > Sent: Wednesday, June 7, 2023 4:36 PM > > > > On Tue, Jun 06, 2023 at 11:08:12PM +0000, Parav Pandit wrote: > > > We can debate and change from cvq to new cfgvq as part of the journey. > > > It is fine. > > > > Just to stress, cvq has a bunch of drawbacks. For example it is hard to access > > from the hypervisor since it's DMA from VF. > > This is why I think our direction should be to add a vq transport that does all > > config accesses over admin commands. > We debate this before, so will write is below. > > Or maybe I'm wrong. > > > > > But, let's distinguish between requirements, and between requirements and > > design. Getting supported counters is a requirement. > > Doing this over cvq is a design. Reducing MMIO registers is a requirement. OK? > > Yes, I would write it as reducing MMIO and accessing it over vq of the own device is a requirement. reducing mmio is a requirement (unrelated to counters btw, it's general). access over vq is a design point I think. -- MST
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