linux-kernel - Re: [PATCH v9 1/5] vfio/migration: Add debugfs to live migration driver

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Message-ID: <ZBjTXwZQs603zHy3@nvidia.com>
Date:   Mon, 20 Mar 2023 18:42:55 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Alex Williamson <alex.williamson@...hat.com>
Cc:     Longfang Liu <liulongfang@...wei.com>,
        shameerali.kolothum.thodi@...wei.com, jonathan.cameron@...wei.com,
        cohuck@...hat.com, linux-kernel@...r.kernel.org,
        linuxarm@...neuler.org
Subject: Re: [PATCH v9 1/5] vfio/migration: Add debugfs to live migration
 driver

On Mon, Mar 20, 2023 at 03:33:36PM -0600, Alex Williamson wrote:

> This would allow that mlx5 and future drivers automatically get this
> with no driver code, and in fact all devices would get debugfs dev_name
> directories for better test coverage.  hisi_acc would only need to add
> driver specific entries after registering the device and free any
> related data after unregistering the device.  In this way, none of the
> entry points here would need to be exported for drivers, which is
> perhaps the direction Jason was thinking with his prior comments.

Yes, my point was more not to add more ops specifically to wrapper
debugfs stuff. If drivers want a special debugfs file then there is
lots of infrastructure to just create that off a common point

Jason