linux-kernel - Re: [RFC v2 0/4] vfio/hisilicon: add acc live migration driver

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Message-ID: <20220218163720.GA1592391@nvidia.com>
Date:   Fri, 18 Feb 2022 12:37:20 -0400
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Shameer Kolothum <shameerali.kolothum.thodi@...wei.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-crypto@...r.kernel.org, alex.williamson@...hat.com,
        mgurtovoy@...dia.com, linuxarm@...wei.com, liulongfang@...wei.com,
        prime.zeng@...ilicon.com, yuzenghui@...wei.com,
        jonathan.cameron@...wei.com, wangzhou1@...ilicon.com
Subject: Re: [RFC v2 0/4] vfio/hisilicon: add acc live migration driver

On Fri, Jul 02, 2021 at 10:58:45AM +0100, Shameer Kolothum wrote:
> Hi,
> 
> This series attempts to add vfio live migration support for
> HiSilicon ACC VF devices. HiSilicon ACC VF device MMIO space
> includes both the functional register space and migration 
> control register space. As discussed in RFCv1[0], this may create
> security issues as these regions get shared between the Guest
> driver and the migration driver. Based on the feedback, we tried
> to address those concerns in this version. 
> 
> This is now based on the new vfio-pci-core framework proposal[1].
> Understand that the framework proposal is still under discussion,
> but really appreciate any feedback on the approach taken here
> to mitigate the security risks.

Do you want to try to get this into this kernel along with the mlx5
driver? How RFCy is this?

If you can post a v2 with the changes discussed soon I think there is
a good chance of this.

Thanks,
Jason