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

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Date:   Tue, 8 Mar 2022 17:46:55 +0800
From:   liulongfang <liulongfang@...wei.com>
To:     Alex Williamson <alex.williamson@...hat.com>,
        Shameerali Kolothum Thodi 
        <shameerali.kolothum.thodi@...wei.com>
CC:     Jason Gunthorpe <jgg@...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>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "cohuck@...hat.com" <cohuck@...hat.com>,
        "mgurtovoy@...dia.com" <mgurtovoy@...dia.com>,
        "yishaih@...dia.com" <yishaih@...dia.com>,
        Linuxarm <linuxarm@...wei.com>,
        "Zengtao (B)" <prime.zeng@...ilicon.com>,
        Jonathan Cameron <jonathan.cameron@...wei.com>,
        "Wangzhou (B)" <wangzhou1@...ilicon.com>,
        Xu Zaibo <xuzaibo@...wei.com>
Subject: Re: [PATCH v8 8/9] hisi_acc_vfio_pci: Add support for VFIO live
 migration

On 2022/3/8 3:52, Alex Williamson wrote:
> On Mon, 7 Mar 2022 19:29:06 +0000
> Shameerali Kolothum Thodi <shameerali.kolothum.thodi@...wei.com> wrote:
> 
>>> -----Original Message-----
>>> From: Alex Williamson [mailto:alex.williamson@...hat.com]
>>> Sent: 07 March 2022 19:05
>>> To: Jason Gunthorpe <jgg@...dia.com>
>>> Cc: Shameerali Kolothum Thodi <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
>>> <linuxarm@...wei.com>; liulongfang <liulongfang@...wei.com>; Zengtao (B)
>>> <prime.zeng@...ilicon.com>; Jonathan Cameron
>>> <jonathan.cameron@...wei.com>; Wangzhou (B) <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.  
>>
>> Yes, they are redundant now since we have added CRYPTO_DEV_HISI_ drivers
>> as "depends" now. I will remove that.
>>  
>>> I think we still require acks from Bjorn and Zaibo for select patches
>>> in this series.  
>>
>> I checked with Ziabo. He moved projects and is no longer looking into crypto stuff.
>> Wangzhou and LiuLongfang now take care of this. Received acks from Wangzhou
>> already and I will request Longfang to provide his. Hope that's ok.
> 
> Maybe a good time to have them update MAINTAINERS as well.  Thanks,
> 
> Alex
> 
OK, we have discussed it internally, I will send a patch to update
MAINTAINERS of crypto stuff.
Thanks.
Longfang
> .
>