linux-kernel - Re: [PATCH] vfio-mdev: support mediated device creation in kernel

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Message-ID: <20200323111404.GA4554@infradead.org>
Date:   Mon, 23 Mar 2020 04:14:04 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Yonghyun Hwang <yonghyun@...gle.com>
Cc:     Kirti Wankhede <kwankhede@...dia.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Cornelia Huck <cohuck@...hat.com>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Havard Skinnemoen <hskinnemoen@...gle.com>,
        Moritz Fischer <mdf@...nel.org>
Subject: Re: [PATCH] vfio-mdev: support mediated device creation in kernel

On Fri, Mar 20, 2020 at 10:59:10AM -0700, Yonghyun Hwang wrote:
> To enable a mediated device, a device driver registers its device to VFIO
> MDev framework. Once the mediated device gets enabled, UUID gets fed onto
> the sysfs attribute, "create", to create the mediated device. This
> additional step happens after boot-up gets complete. If the driver knows
> how many mediated devices need to be created during probing time, the
> additional step becomes cumbersome. This commit implements a new function
> to allow the driver to create a mediated device in kernel.

Please send this along with your proposed user so that we can understand
the use.  Without that new exports have no chance of going in anyway.