netdev - Re: [PATCH V6 6/6] docs: sample driver to demonstrate how to implement virtio-mdev framework

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Message-ID: <d8266abb-391a-27d0-59ab-3e1412fe73da@redhat.com>
Date:   Thu, 31 Oct 2019 09:46:02 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     kvm@...r.kernel.org, linux-s390@...r.kernel.org,
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Subject: Re: [PATCH V6 6/6] docs: sample driver to demonstrate how to
 implement virtio-mdev framework


On 2019/10/31 上午5:23, Christoph Hellwig wrote:
> On Wed, Oct 30, 2019 at 02:44:44PM +0800, Jason Wang wrote:
>> This sample driver creates mdev device that simulate virtio net device
>> over virtio mdev transport. The device is implemented through vringh
>> and workqueue. A device specific dma ops is to make sure HVA is used
>> directly as the IOVA. This should be sufficient for kernel virtio
>> driver to work.
>>
>> Only 'virtio' type is supported right now. I plan to add 'vhost' type
>> on top which requires some virtual IOMMU implemented in this sample
>> driver.
> Can we please submit a real driver for it?  A more or less useless
> sample driver doesn't really qualify for our normal kernel requirements
> that infrastructure should have a real user.


Intel posted a real driver here: https://lkml.org/lkml/2019/10/15/1226.

I plan to post another driver that wire virito-pci back to mdev bus on 
top of this series as well.

Thanks