linux-kernel - RE: [RFC] hypercall-vsock: add a new vsock transport

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Date:   Thu, 11 Nov 2021 08:14:11 +0000
From:   "Wang, Wei W" <wei.w.wang@...el.com>
To:     Stefano Garzarella <sgarzare@...hat.com>
CC:     "davem@...emloft.net" <davem@...emloft.net>,
        "kuba@...nel.org" <kuba@...nel.org>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        "mst@...hat.com" <mst@...hat.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        "kys@...rosoft.com" <kys@...rosoft.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "virtualization@...ts.linux-foundation.org" 
        <virtualization@...ts.linux-foundation.org>,
        "Yamahata, Isaku" <isaku.yamahata@...el.com>,
        "Nakajima, Jun" <jun.nakajima@...el.com>,
        "Kleen, Andi" <andi.kleen@...el.com>,
        Andra Paraschiv <andraprs@...zon.com>,
        "Sergio Lopez Pascual" <slp@...hat.com>
Subject: RE: [RFC] hypercall-vsock: add a new vsock transport

On Wednesday, November 10, 2021 7:17 PM, Stefano Garzarella wrote:


> Adding Andra and Sergio, because IIRC Firecracker and libkrun emulates
> virtio-vsock with virtio-mmio so the implementation should be simple and also
> not directly tied to a specific VMM.
> 

OK. This would be OK for KVM based guests.
For Hyperv and VMWare based guests, they don't have virtio-mmio support.
If the MigTD (a special guest) we provide is based on virtio-mmio, it would not be usable to them.

Thanks,
Wei