linux-kernel - RE: [PATCH v9 8/9] hisi_acc_vfio_pci: Add support for VFIO live migration

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Message-ID: <BN9PR11MB5276B77B877A6A80A5B514688C0A9@BN9PR11MB5276.namprd11.prod.outlook.com>
Date:   Wed, 9 Mar 2022 12:06:21 +0000
From:   "Tian, Kevin" <kevin.tian@...el.com>
To:     Shameer Kolothum <shameerali.kolothum.thodi@...wei.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>
CC:     "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "alex.williamson@...hat.com" <alex.williamson@...hat.com>,
        "jgg@...dia.com" <jgg@...dia.com>,
        "cohuck@...hat.com" <cohuck@...hat.com>,
        "mgurtovoy@...dia.com" <mgurtovoy@...dia.com>,
        "yishaih@...dia.com" <yishaih@...dia.com>,
        "linuxarm@...wei.com" <linuxarm@...wei.com>,
        "liulongfang@...wei.com" <liulongfang@...wei.com>,
        "prime.zeng@...ilicon.com" <prime.zeng@...ilicon.com>,
        "jonathan.cameron@...wei.com" <jonathan.cameron@...wei.com>,
        "wangzhou1@...ilicon.com" <wangzhou1@...ilicon.com>
Subject: RE: [PATCH v9 8/9] hisi_acc_vfio_pci: Add support for VFIO live
 migration

> From: Shameer Kolothum <shameerali.kolothum.thodi@...wei.com>
> Sent: Wednesday, March 9, 2022 2:49 AM
> 
> 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.
> 
> Just like ACC PF/VF drivers this VFIO driver also make use of the HiSilicon
> QM interface. QM stands for Queue Management which is a generic IP used
> by
> ACC devices. It provides a generic PCIe interface for the CPU and the ACC
> devices to share a group of queues.
> 
> QM integrated into an accelerator provides queue management service.
> Queues can be assigned to PF and VFs, and queues can be controlled by
> unified mailboxes and doorbells.
> 
> The QM driver (drivers/crypto/hisilicon/qm.c) provides generic
> interfaces to ACC drivers to manage the QM.
> 
> Signed-off-by: Longfang Liu <liulongfang@...wei.com>
> Reviewed-by: Jason Gunthorpe <jgg@...dia.com>
> Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@...wei.com>

Except the stuff before hisi_acc_vf_disable_fd() which is very QM specific:

	Reviewed-by: Kevin Tian <kevin.tian@...el.com>

Thanks
Kevin