netdev - Re: [virtio-dev] Re: [RFC] vhost: introduce mdev based hardware vhost backend

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Message-ID: <20180411020150.GE28698@stefanha-x1.localdomain>
Date:   Wed, 11 Apr 2018 10:01:50 +0800
From:   Stefan Hajnoczi <stefanha@...hat.com>
To:     "Liang, Cunming" <cunming.liang@...el.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        "Bie, Tiwei" <tiwei.bie@...el.com>,
        Jason Wang <jasowang@...hat.com>,
        "mst@...hat.com" <mst@...hat.com>,
        "alex.williamson@...hat.com" <alex.williamson@...hat.com>,
        "ddutile@...hat.com" <ddutile@...hat.com>,
        "Duyck, Alexander H" <alexander.h.duyck@...el.com>,
        "virtio-dev@...ts.oasis-open.org" <virtio-dev@...ts.oasis-open.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "virtualization@...ts.linux-foundation.org" 
        <virtualization@...ts.linux-foundation.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "Daly, Dan" <dan.daly@...el.com>,
        "Wang, Zhihong" <zhihong.wang@...el.com>,
        "Tan, Jianfeng" <jianfeng.tan@...el.com>,
        "Wang, Xiao W" <xiao.w.wang@...el.com>
Subject: Re: [virtio-dev] Re: [RFC] vhost: introduce mdev based hardware
 vhost backend

On Tue, Apr 10, 2018 at 09:23:53AM +0000, Liang, Cunming wrote:
> If QEMU is going to build a user space driver framework there, we're open mind on that, even leveraging DPDK as the underlay library. Looking forward to more others' comments from community.

There is already an NVMe VFIO driver in QEMU (see block/nvme.c).  So in
principle there's no reason against userspace drivers in QEMU.

Stefan

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