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Date:   Mon, 12 Dec 2022 08:41:34 +0100
From:   Christoph Hellwig <hch@lst.de>
To:     "Tian, Kevin" <kevin.tian@intel.com>
Cc:     Christoph Hellwig <hch@lst.de>,
        Max Gurtovoy <mgurtovoy@nvidia.com>,
        Jason Gunthorpe <jgg@ziepe.ca>, "Rao, Lei" <lei.rao@intel.com>,
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        "yishaih@nvidia.com" <yishaih@nvidia.com>,
        "shameerali.kolothum.thodi@huawei.com" 
        <shameerali.kolothum.thodi@huawei.com>,
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        "Dong, Eddie" <eddie.dong@intel.com>,
        "Li, Yadong" <yadong.li@intel.com>,
        "Liu, Yi L" <yi.l.liu@intel.com>,
        "Wilk, Konrad" <konrad.wilk@oracle.com>,
        "stephen@eideticom.com" <stephen@eideticom.com>,
        "Yuan, Hang" <hang.yuan@intel.com>
Subject: Re: [RFC PATCH 1/5] nvme-pci: add function nvme_submit_vf_cmd to
 issue admin commands for VF driver.
Message-ID: <20221212074134.GA11162@lst.de>
References: <Y49HKHP9NrId39iH@ziepe.ca> <20221206135810.GA27689@lst.de> <Y49eObpI7QoSnugu@ziepe.ca> <20221206153811.GB2266@lst.de> <Y49k++D3i8DfLOLL@ziepe.ca> <20221206165503.GA8677@lst.de> <Y4+U3VR2LeEh2S7B@ziepe.ca> <2975e217-749b-6929-cd2d-4b6276ef33d1@nvidia.com> <20221207075834.GC2283@lst.de> <BN9PR11MB52766AC1962858248B7030E28C1C9@BN9PR11MB5276.namprd11.prod.outlook.com>
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On Fri, Dec 09, 2022 at 02:11:21AM +0000, Tian, Kevin wrote:
> > It can't.  That's the whole point.  The controlled function that is
> > being migrate must be absolutely unaware of that (except for things
> > like quiescing access or FLRs that could happen anyway), because
> > otherwise your have a fundamental information leak.
> > 
> 
> Can you elaborate which information is leaked?

Information about what controllers exist, what namespaces exist, etc.