linux-kernel - Re: [RFC v2 1/4] hisi-acc-vfio-pci: add new vfio

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Message-ID: <20210706115131.GW4459@nvidia.com>
Date:   Tue, 6 Jul 2021 08:51:31 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Leon Romanovsky <leon@...nel.org>,
        Shameerali Kolothum Thodi 
        <shameerali.kolothum.thodi@...wei.com>,
        Max Gurtovoy <mgurtovoy@...dia.com>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
        "alex.williamson@...hat.com" <alex.williamson@...hat.com>,
        Linuxarm <linuxarm@...wei.com>,
        liulongfang <liulongfang@...wei.com>,
        "Zengtao (B)" <prime.zeng@...ilicon.com>,
        yuzenghui <yuzenghui@...wei.com>,
        Jonathan Cameron <jonathan.cameron@...wei.com>,
        "Wangzhou (B)" <wangzhou1@...ilicon.com>
Subject: Re: [RFC v2 1/4] hisi-acc-vfio-pci: add new vfio_pci driver for
 HiSilicon ACC devices

On Tue, Jul 06, 2021 at 05:39:25AM +0100, Christoph Hellwig wrote:
> On Mon, Jul 05, 2021 at 03:32:47PM -0300, Jason Gunthorpe wrote:
> > It would be improved a bit by making the ops struct mutable and
> > populating it at runtime like we do in RDMA. Then the PCI ops and
> > driver ops could be merged together without the repetition.
> 
> No, that would be everything but an improvement.

Do you have an alternative? It has worked reasonably with the similar
RDMA problems.

Jason