linux-kernel - Re: [PATCH v8 8/9] hisi_acc_vfio_pci: Add support for VFIO live migration

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Message-ID: <20220307120513.74743f17.alex.williamson@redhat.com>
Date:   Mon, 7 Mar 2022 12:05:13 -0700
From:   Alex Williamson <alex.williamson@...hat.com>
To:     Jason Gunthorpe <jgg@...dia.com>
Cc:     Shameer Kolothum <shameerali.kolothum.thodi@...wei.com>,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-crypto@...r.kernel.org, linux-pci@...r.kernel.org,
        cohuck@...hat.com, mgurtovoy@...dia.com, yishaih@...dia.com,
        linuxarm@...wei.com, liulongfang@...wei.com,
        prime.zeng@...ilicon.com, jonathan.cameron@...wei.com,
        wangzhou1@...ilicon.com
Subject: Re: [PATCH v8 8/9] hisi_acc_vfio_pci: Add support for VFIO live
 migration

On Fri, 4 Mar 2022 16:57:20 -0400
Jason Gunthorpe <jgg@...dia.com> wrote:

> On Thu, Mar 03, 2022 at 11:01:30PM +0000, Shameer Kolothum wrote:
> > From: Longfang Liu <liulongfang@...wei.com>
> > 
> > VMs assigned with HiSilicon ACC VF devices can now perform live migration
> > if the VF devices are bind to the hisi_acc_vfio_pci driver.
> > 
> > Signed-off-by: Longfang Liu <liulongfang@...wei.com>
> > Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@...wei.com>
> > ---
> >  drivers/vfio/pci/hisilicon/Kconfig            |    7 +
> >  .../vfio/pci/hisilicon/hisi_acc_vfio_pci.c    | 1078 ++++++++++++++++-
> >  .../vfio/pci/hisilicon/hisi_acc_vfio_pci.h    |  114 ++
> >  3 files changed, 1181 insertions(+), 18 deletions(-)
> >  create mode 100644 drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.h
> > 
> > diff --git a/drivers/vfio/pci/hisilicon/Kconfig b/drivers/vfio/pci/hisilicon/Kconfig
> > index dc723bad05c2..2a68d39f339f 100644
> > --- a/drivers/vfio/pci/hisilicon/Kconfig
> > +++ b/drivers/vfio/pci/hisilicon/Kconfig
> > @@ -3,6 +3,13 @@ config HISI_ACC_VFIO_PCI
> >  	tristate "VFIO PCI support for HiSilicon ACC devices"
> >  	depends on ARM64 || (COMPILE_TEST && 64BIT)
> >  	depends on VFIO_PCI_CORE
> > +	depends on PCI && PCI_MSI  
> 
> PCI is already in the depends from the 2nd line in
> drivers/vfio/pci/Kconfig, but it is harmless
> 
> > +	depends on UACCE || UACCE=n
> > +	depends on ACPI  
> 
> Scratching my head a bit on why we have these

Same curiosity from me, each of the CRYPTO_DEV_HISI_* options selected
also depend on these so they seem redundant.

I think we still require acks from Bjorn and Zaibo for select patches
in this series.

From me, I would request a MAINTAINERS entry similar to the one the
mlx5 folks added for their driver.  This should be in patch 4/9 where
the driver is originally added.  Thanks,

Alex