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Subject: Re: [PATCH 1/5] Add virtio Admin Virtqueue specification
On Wed, Jan 19, 2022 at 4:11 PM Michael S. Tsirkin <mst@redhat.com> wrote: > > On Wed, Jan 19, 2022 at 11:04:50AM +0800, Jason Wang wrote: > > Exactly, another call for the using the PRS queue instead. But generally > > speaking, admin virtqueue limit or complicate the functions that can be > > exported to guest. That's why I suggest to decouple all the possible > > features out of admin virtqueue, and make it available by both the admin > > virtqueue and the transport specific method (e.g capability). > > I'm not exactly sure what's wrong with starting with a queue, if there's > need to also allow passing that over another transport we can add that. Nothing wrong, but I think we can't mandate the features to be implemented solely via admin virtqueue. Each transport has its own use cases. Making admin virtqueue to be visible in the nested environment will be a challenge. > In particular, I think it's useful to have a capability to inject > requests as if they have been passed through a VQ. > Such a capability would address this need, won't it? It really depends on the requirement, for simple requests like MSI support in virtio-mmio, introducing such a large change seems sub-optimal than an ad-hoc MSI interface. Thanks > > -- > MST >
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