linux-kernel - Re: [PATCH 5/6] vdpa: introduce virtio pci driver

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Message-ID: <20200602010809-mutt-send-email-mst@kernel.org>
Date:   Tue, 2 Jun 2020 01:09:34 -0400
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Jason Wang <jasowang@...hat.com>
Cc:     kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        rob.miller@...adcom.com, lingshan.zhu@...el.com,
        eperezma@...hat.com, lulu@...hat.com, shahafs@...lanox.com,
        hanand@...inx.com, mhabets@...arflare.com, gdawar@...inx.com,
        saugatm@...inx.com, vmireyno@...vell.com,
        zhangweining@...jie.com.cn, eli@...lanox.com
Subject: Re: [PATCH 5/6] vdpa: introduce virtio pci driver

On Fri, May 29, 2020 at 04:03:02PM +0800, Jason Wang wrote:
> Note that since virtio specification does not support get/restore
> virtqueue state. So we can not use this driver for VM. This can be
> addressed by extending the virtio specification.

Looks like exactly the kind of hardware limitation VDPA is supposed to
paper over within guest. So I suggest we use this as
a litmus test, and find ways for VDPA to handle this without
spec changes.

-- 
MST