From: Jason Gunthorpe <jgg@nvidia.com>
To: Alex Williamson <alex.williamson@redhat.com>
Cc: Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>,
liulongfang <liulongfang@huawei.com>,
"cohuck@redhat.com" <cohuck@redhat.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linuxarm@openeuler.org" <linuxarm@openeuler.org>
Subject: Re: [Linuxarm] Re: [RFC PATCH 2/3] vfio/hisilicon: register the driver to vfio
Date: Thu, 13 May 2021 15:34:52 -0300 [thread overview]
Message-ID: <20210513183452.GP1002214@nvidia.com> (raw)
In-Reply-To: <20210513122232.589d24d8@redhat.com>
On Thu, May 13, 2021 at 12:22:32PM -0600, Alex Williamson wrote:
> If you expect this device to appear only as an integrated endpoint, then
> I think Jason's suggestion above is correct. Your driver that supports
> migration can refuse to load for devices there the topology is other
> than expected and you're effectively guaranteeing DMA isolation of the
> user and in-kernel drivers by hardware DMA semantics and topology.
Some kind of VFIO api 'vfio_is_this_pci_dev_is_safe_to_share()'
seems appropriate here.
I saw Intel doing the same thing in one of their VDPA driver proposals.
Jason
next prev parent reply other threads:[~2021-05-13 18:34 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-13 3:36 [RFC PATCH 0/3] vfio/hisilicon: add acc live migration driver Longfang Liu
2021-04-13 3:36 ` [RFC PATCH 1/3] " Longfang Liu
2021-04-13 3:36 ` [RFC PATCH 2/3] vfio/hisilicon: register the driver to vfio Longfang Liu
2021-04-15 22:01 ` Jason Gunthorpe
2021-04-19 12:24 ` liulongfang
2021-04-19 12:33 ` Jason Gunthorpe
2021-04-20 12:50 ` liulongfang
2021-04-20 12:59 ` Jason Gunthorpe
2021-04-20 13:28 ` liulongfang
2021-04-20 14:55 ` Jason Gunthorpe
2021-04-20 22:04 ` Alex Williamson
2021-04-20 23:18 ` Jason Gunthorpe
2021-04-21 9:59 ` liulongfang
2021-04-21 9:59 ` liulongfang
2021-04-21 18:12 ` Alex Williamson
2021-04-26 11:49 ` liulongfang
2021-05-12 8:39 ` liulongfang
2021-05-12 12:10 ` Jason Gunthorpe
2021-05-13 2:08 ` liulongfang
2021-05-13 13:44 ` Jason Gunthorpe
2021-05-13 15:49 ` [Linuxarm] " Shameerali Kolothum Thodi
2021-05-13 17:03 ` Alex Williamson
2021-05-13 17:52 ` Shameerali Kolothum Thodi
2021-05-13 18:22 ` Alex Williamson
2021-05-13 18:31 ` Shameerali Kolothum Thodi
2021-05-13 18:34 ` Jason Gunthorpe [this message]
2021-05-13 18:24 ` Jason Gunthorpe
2021-05-13 18:35 ` Shameerali Kolothum Thodi
2021-05-27 10:11 ` Shameerali Kolothum Thodi
2021-05-27 10:30 ` Max Gurtovoy
2021-04-13 3:36 ` [RFC PATCH 3/3] vfio/hisilicom: add debugfs for driver Longfang Liu
2021-04-15 21:35 ` [RFC PATCH 0/3] vfio/hisilicon: add acc live migration driver Alex Williamson
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