From: Jason Gunthorpe <jgg@nvidia.com>
To: "Liu, Yi L" <yi.l.liu@intel.com>
Cc: Alex Williamson <alex.williamson@redhat.com>,
Cornelia Huck <cohuck@redhat.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"Raj, Ashok" <ashok.raj@intel.com>,
"Williams, Dan J" <dan.j.williams@intel.com>,
Daniel Vetter <daniel@ffwll.ch>, Christoph Hellwig <hch@lst.de>,
Leon Romanovsky <leonro@nvidia.com>,
Max Gurtovoy <mgurtovoy@nvidia.com>,
Tarun Gupta <targupta@nvidia.com>
Subject: Re: [PATCH 05/10] vfio/pci: Use vfio_init/register/unregister_group_dev
Date: Fri, 12 Mar 2021 09:58:49 -0400 [thread overview]
Message-ID: <20210312135849.GW2356281@nvidia.com> (raw)
In-Reply-To: <BN6PR11MB4068CC82B20352BF15A9C75EC36F9@BN6PR11MB4068.namprd11.prod.outlook.com>
On Fri, Mar 12, 2021 at 12:53:18PM +0000, Liu, Yi L wrote:
> But I have a question on the FIXME comment here. I checked the code below.
> Even after vfio_register_group_dev(), userspace is not able to get DEVICE_FD
> until the group has been added to a container.
The race here is between VFIO_GROUP_GET_DEVICE_FD and bind
Userspace would have already done VFIO_GROUP_SET_CONTAINER before it
does the VFIO_GROUP_GET_DEVICE_FD.
Jason
next prev parent reply other threads:[~2021-03-12 13:59 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-09 21:38 [PATCH 00/10] Embed struct vfio_device in all sub-structures Jason Gunthorpe
2021-03-09 21:38 ` [PATCH 01/10] vfio: Simplify the lifetime logic for vfio_device Jason Gunthorpe
2021-03-10 7:23 ` Christoph Hellwig
2021-03-12 15:41 ` Jason Gunthorpe
2021-03-12 16:32 ` Christoph Hellwig
2021-03-09 21:38 ` [PATCH 02/10] vfio: Split creation of a vfio_device into init and register ops Jason Gunthorpe
2021-03-10 7:26 ` Christoph Hellwig
2021-03-12 13:04 ` Liu, Yi L
2021-03-12 14:23 ` Jason Gunthorpe
2021-03-12 16:31 ` Christoph Hellwig
2021-03-09 21:38 ` [PATCH 03/10] vfio/platform: Use vfio_init/register/unregister_group_dev Jason Gunthorpe
2021-03-10 7:28 ` Christoph Hellwig
2021-03-12 17:00 ` Jason Gunthorpe
2021-03-09 21:38 ` [PATCH 04/10] vfio/fsl-mc: " Jason Gunthorpe
2021-03-10 7:30 ` Christoph Hellwig
2021-03-10 12:43 ` Jason Gunthorpe
2021-03-09 21:38 ` [PATCH 05/10] vfio/pci: " Jason Gunthorpe
2021-03-10 7:31 ` Christoph Hellwig
2021-03-12 12:53 ` Liu, Yi L
2021-03-12 13:58 ` Jason Gunthorpe [this message]
2021-03-09 21:38 ` [PATCH 06/10] vfio/mdev: " Jason Gunthorpe
2021-03-10 7:31 ` Christoph Hellwig
2021-03-12 13:09 ` Liu, Yi L
2021-03-09 21:38 ` [PATCH 07/10] vfio/mdev: Make to_mdev_device() into a static inline Jason Gunthorpe
2021-03-10 7:32 ` Christoph Hellwig
2021-03-09 21:38 ` [PATCH 08/10] vfio: Make vfio_device_ops pass a 'struct vfio_device *' instead of 'void *' Jason Gunthorpe
2021-03-10 5:52 ` Dan Williams
2021-03-10 6:24 ` Leon Romanovsky
2021-03-10 12:58 ` Jason Gunthorpe
2021-03-10 20:01 ` Dan Williams
2021-03-12 13:42 ` Liu, Yi L
2021-03-12 14:06 ` Jason Gunthorpe
2021-03-09 21:38 ` [PATCH 09/10] vfio/pci: Replace uses of vfio_device_data() with container_of Jason Gunthorpe
2021-03-10 7:36 ` Christoph Hellwig
2021-03-10 19:59 ` Jason Gunthorpe
2021-03-11 11:21 ` Christoph Hellwig
2021-03-12 13:42 ` Liu, Yi L
2021-03-12 14:09 ` Jason Gunthorpe
2021-03-09 21:38 ` [PATCH 10/10] vfio: Remove device_data from the vfio bus driver API Jason Gunthorpe
2021-03-10 7:37 ` Christoph Hellwig
2021-03-10 23:52 ` [PATCH 00/10] Embed struct vfio_device in all sub-structures Alex Williamson
2021-03-10 23:57 ` Jason Gunthorpe
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