From: Jason Gunthorpe <jgg@nvidia.com>
To: "Liu, Yi L" <yi.l.liu@intel.com>
Cc: Alex Williamson <alex.williamson@redhat.com>,
"Tian, Kevin" <kevin.tian@intel.com>,
"cohuck@redhat.com" <cohuck@redhat.com>,
"eric.auger@redhat.com" <eric.auger@redhat.com>,
"nicolinc@nvidia.com" <nicolinc@nvidia.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"mjrosato@linux.ibm.com" <mjrosato@linux.ibm.com>,
"chao.p.peng@linux.intel.com" <chao.p.peng@linux.intel.com>,
"yi.y.sun@linux.intel.com" <yi.y.sun@linux.intel.com>,
"peterx@redhat.com" <peterx@redhat.com>,
"jasowang@redhat.com" <jasowang@redhat.com>,
"suravee.suthikulpanit@amd.com" <suravee.suthikulpanit@amd.com>
Subject: Re: [PATCH 10/13] vfio: Make vfio_device_open() exclusive between group path and device cdev path
Date: Fri, 3 Feb 2023 13:41:21 -0400 [thread overview]
Message-ID: <Y91HQUFrY5jbwoHF@nvidia.com> (raw)
In-Reply-To: <DS0PR11MB752960717017DFE7D2FB3AFBC3D69@DS0PR11MB7529.namprd11.prod.outlook.com>
On Thu, Feb 02, 2023 at 05:34:15AM +0000, Liu, Yi L wrote:
> This seems to be ok. The group path will attach the group to an auto-allocated
> iommu_domain, while the cdev path actually waits for userspace to
> attach it to an IOAS. Userspace should take care of it. It should ensure
> the devices in the same group should be attached to the same domain.
Aren't there problems when someone closes the group or device FD while
the other one is still open though?
Jason
next prev parent reply other threads:[~2023-02-03 17:41 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-17 13:49 [PATCH 00/13] Add vfio_device cdev for iommufd support Yi Liu
2023-01-17 13:49 ` [PATCH 01/13] vfio: Allocate per device file structure Yi Liu
2023-01-18 8:37 ` Tian, Kevin
2023-01-18 13:28 ` Eric Auger
2023-01-17 13:49 ` [PATCH 02/13] vfio: Refine vfio file kAPIs Yi Liu
2023-01-18 8:42 ` Tian, Kevin
2023-01-18 14:37 ` Eric Auger
2023-01-29 13:32 ` Liu, Yi L
2023-01-17 13:49 ` [PATCH 03/13] vfio: Accept vfio device file in the driver facing kAPI Yi Liu
2023-01-18 8:45 ` Tian, Kevin
2023-01-18 16:11 ` Eric Auger
2023-01-30 9:47 ` Liu, Yi L
2023-01-30 18:02 ` Jason Gunthorpe
2023-01-17 13:49 ` [PATCH 04/13] kvm/vfio: Rename kvm_vfio_group to prepare for accepting vfio device fd Yi Liu
2023-01-18 8:47 ` Tian, Kevin
2023-01-18 16:33 ` Eric Auger
2023-01-17 13:49 ` [PATCH 05/13] kvm/vfio: Provide struct kvm_device_ops::release() insted of ::destroy() Yi Liu
2023-01-18 8:56 ` Tian, Kevin
2023-01-19 9:12 ` Eric Auger
2023-01-19 9:30 ` Tian, Kevin
2023-01-20 3:52 ` Liu, Yi L
2023-01-19 19:07 ` Jason Gunthorpe
2023-01-19 20:04 ` Alex Williamson
2023-01-20 13:03 ` Liu, Yi L
2023-01-20 14:00 ` Liu, Yi L
2023-01-20 14:33 ` Jason Gunthorpe
2023-01-20 15:09 ` Liu, Yi L
2023-01-20 15:11 ` Liu, Yi L
2023-01-17 13:49 ` [PATCH 06/13] kvm/vfio: Accept vfio device file from userspace Yi Liu
2023-01-18 9:18 ` Tian, Kevin
2023-01-19 9:35 ` Eric Auger
2023-01-30 7:36 ` Liu, Yi L
2023-01-17 13:49 ` [PATCH 07/13] vfio: Pass struct vfio_device_file * to vfio_device_open/close() Yi Liu
2023-01-18 9:27 ` Tian, Kevin
2023-01-19 11:01 ` Eric Auger
2023-01-19 20:35 ` Alex Williamson
2023-01-30 9:38 ` Liu, Yi L
2023-01-30 9:38 ` Liu, Yi L
2023-01-17 13:49 ` [PATCH 08/13] vfio: Block device access via device fd until device is opened Yi Liu
2023-01-18 9:35 ` Tian, Kevin
2023-01-18 13:52 ` Jason Gunthorpe
2023-01-19 3:42 ` Tian, Kevin
2023-01-19 3:43 ` Liu, Yi L
2023-01-19 14:00 ` Eric Auger
2023-01-30 10:41 ` Liu, Yi L
2023-01-19 20:47 ` Alex Williamson
2023-01-30 10:48 ` Liu, Yi L
2023-01-17 13:49 ` [PATCH 09/13] vfio: Add infrastructure for bind_iommufd and attach Yi Liu
2023-01-19 9:45 ` Tian, Kevin
2023-01-30 13:52 ` Liu, Yi L
2023-01-19 23:05 ` Alex Williamson
2023-01-30 13:55 ` Liu, Yi L
2023-01-17 13:49 ` [PATCH 10/13] vfio: Make vfio_device_open() exclusive between group path and device cdev path Yi Liu
2023-01-19 9:55 ` Tian, Kevin
2023-01-30 11:59 ` Liu, Yi L
2023-01-19 23:51 ` Alex Williamson
2023-01-30 12:14 ` Liu, Yi L
2023-02-02 5:34 ` Liu, Yi L
2023-02-03 17:41 ` Jason Gunthorpe [this message]
2023-02-06 4:30 ` Liu, Yi L
2023-02-06 10:09 ` Tian, Kevin
2023-02-06 15:10 ` Jason Gunthorpe
2023-02-06 15:51 ` Liu, Yi L
2023-02-07 0:35 ` Tian, Kevin
2023-02-07 13:12 ` Jason Gunthorpe
2023-02-07 13:19 ` Liu, Yi L
2023-02-07 13:20 ` Jason Gunthorpe
2023-02-07 13:23 ` Liu, Yi L
2023-02-07 13:27 ` Jason Gunthorpe
2023-02-07 13:55 ` Liu, Yi L
2023-02-08 4:23 ` Tian, Kevin
2023-02-08 12:41 ` Jason Gunthorpe
2023-01-17 13:49 ` [PATCH 11/13] vfio: Add cdev for vfio_device Yi Liu
2023-01-20 7:26 ` Tian, Kevin
2023-01-31 6:17 ` Liu, Yi L
2023-01-24 20:44 ` Jason Gunthorpe
2023-01-17 13:49 ` [PATCH 12/13] vfio: Add ioctls for device cdev iommufd Yi Liu
2023-01-20 8:03 ` Tian, Kevin
2023-02-06 9:07 ` Liu, Yi L
2023-01-17 13:49 ` [PATCH 13/13] vfio: Compile group optionally Yi Liu
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