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

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Message-ID: <20191030212312.GA4251@infradead.org>
Date:   Wed, 30 Oct 2019 14:23:12 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Jason Wang <jasowang@...hat.com>
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 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.