From: Jason Gunthorpe <jgg@nvidia.com>
To: "Liu, Yi L" <yi.l.liu@intel.com>
Cc: "alex.williamson@redhat.com" <alex.williamson@redhat.com>,
"Tian, Kevin" <kevin.tian@intel.com>,
"joro@8bytes.org" <joro@8bytes.org>,
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"linux-s390@vger.kernel.org" <linux-s390@vger.kernel.org>,
"Hao, Xudong" <xudong.hao@intel.com>,
"Zhao, Yan Y" <yan.y.zhao@intel.com>,
"Xu, Terrence" <terrence.xu@intel.com>
Subject: Re: [PATCH v5 17/19] vfio: Add VFIO_DEVICE_AT[DE]TACH_IOMMUFD_PT
Date: Tue, 28 Feb 2023 08:32:12 -0400 [thread overview]
Message-ID: <Y/30TEk3t7q/D0Ho@nvidia.com> (raw)
In-Reply-To: <DS0PR11MB75293EF02CB0F0A54A22D943C3AC9@DS0PR11MB7529.namprd11.prod.outlook.com>
On Tue, Feb 28, 2023 at 02:51:28AM +0000, Liu, Yi L wrote:
> > This seems strange. no iommu mode should have a NULL dev->iommufctx.
> > Why do we have a df->noiommu at all?
>
> This is due to the vfio_device_first_open(). Detail as below comment (part of
> patch 0016).
>
> + /*
> + * For group/container path, iommufd pointer is NULL when comes
> + * into this helper. Its noiommu support is handled by
> + * vfio_device_group_use_iommu()
> + *
> + * For iommufd compat mode, iommufd pointer here is a valid value.
> + * Its noiommu support is in vfio_iommufd_bind().
> + *
> + * For device cdev path, iommufd pointer here is a valid value for
> + * normal cases, but it is NULL if it's noiommu. Check df->noiommu
> + * to differentiate cdev noiommu from the group/container path which
> + * also passes NULL iommufd pointer in. If set then do nothing.
> + */
If the group is in iommufd mode then it should set this pointer too.
Jason
next prev parent reply other threads:[~2023-02-28 12:32 UTC|newest]
Thread overview: 128+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-27 11:11 [PATCH v5 00/19] Add vfio_device cdev for iommufd support Yi Liu
2023-02-27 11:11 ` [PATCH v5 01/19] vfio: Allocate per device file structure Yi Liu
2023-02-27 18:46 ` Jason Gunthorpe
2023-02-27 11:11 ` [PATCH v5 02/19] vfio: Refine vfio file kAPIs for KVM Yi Liu
2023-02-27 18:46 ` Jason Gunthorpe
2023-02-27 11:11 ` [PATCH v5 03/19] vfio: Accept vfio device file in the KVM facing kAPI Yi Liu
2023-02-27 18:46 ` Jason Gunthorpe
2023-02-27 11:11 ` [PATCH v5 04/19] kvm/vfio: Rename kvm_vfio_group to prepare for accepting vfio device fd Yi Liu
2023-02-27 18:47 ` Jason Gunthorpe
2023-02-27 11:11 ` [PATCH v5 05/19] kvm/vfio: Accept vfio device file from userspace Yi Liu
2023-02-27 18:47 ` Jason Gunthorpe
2023-02-27 11:11 ` [PATCH v5 06/19] vfio: Pass struct vfio_device_file * to vfio_device_open/close() Yi Liu
2023-02-27 18:47 ` Jason Gunthorpe
2023-02-27 11:11 ` [PATCH v5 07/19] vfio: Block device access via device fd until device is opened Yi Liu
2023-02-27 18:48 ` Jason Gunthorpe
2023-03-01 9:22 ` Liu, Yi L
2023-02-27 11:11 ` [PATCH v5 08/19] vfio/pci: Update comment around group_fd get in vfio_pci_ioctl_pci_hot_reset() Yi Liu
2023-02-27 18:48 ` Jason Gunthorpe
2023-02-27 11:11 ` [PATCH v5 09/19] vfio/pci: Allow passing zero-length fd array in VFIO_DEVICE_PCI_HOT_RESET Yi Liu
2023-02-27 18:22 ` Jason Gunthorpe
2023-02-28 2:31 ` Liu, Yi L
2023-03-02 6:07 ` Liu, Yi L
2023-03-02 9:55 ` Tian, Kevin
2023-03-02 12:35 ` Jason Gunthorpe
2023-03-02 14:20 ` Liu, Yi L
2023-03-03 6:36 ` Tian, Kevin
2023-03-03 16:55 ` Alex Williamson
2023-03-05 14:48 ` Liu, Yi L
2023-03-06 8:16 ` Tian, Kevin
2023-03-06 8:23 ` Tian, Kevin
2023-03-06 8:33 ` Liu, Yi L
2023-03-06 9:59 ` Liu, Yi L
2023-03-06 13:16 ` Jason Gunthorpe
2023-03-07 2:31 ` Tian, Kevin
2023-03-07 2:35 ` Liu, Yi L
2023-03-07 12:36 ` Jason Gunthorpe
2023-03-07 13:28 ` Liu, Yi L
2023-03-08 7:26 ` Tian, Kevin
2023-03-08 7:47 ` Liu, Yi L
2023-03-08 7:55 ` Tian, Kevin
2023-03-08 8:00 ` Liu, Yi L
2023-03-08 8:14 ` Tian, Kevin
2023-03-08 8:15 ` Liu, Yi L
2023-03-08 15:08 ` Jason Gunthorpe
2023-03-02 21:04 ` Alex Williamson
2023-02-27 11:11 ` [PATCH v5 10/19] vfio: Add infrastructure for bind_iommufd from userspace Yi Liu
2023-02-27 18:29 ` Jason Gunthorpe
2023-02-28 2:35 ` Liu, Yi L
2023-02-28 6:58 ` Liu, Yi L
2023-02-28 12:31 ` Jason Gunthorpe
2023-02-28 12:45 ` Liu, Yi L
2023-02-28 12:52 ` Jason Gunthorpe
2023-02-28 12:56 ` Liu, Yi L
2023-02-28 12:58 ` Jason Gunthorpe
2023-02-28 12:29 ` Jason Gunthorpe
2023-02-28 12:48 ` Liu, Yi L
2023-02-28 12:52 ` Jason Gunthorpe
2023-02-28 13:24 ` Liu, Yi L
2023-02-27 11:11 ` [PATCH v5 11/19] vfio-iommufd: Add detach_ioas support for physical VFIO devices Yi Liu
2023-02-27 18:44 ` Jason Gunthorpe
2023-02-28 2:57 ` Liu, Yi L
2023-02-28 12:33 ` Jason Gunthorpe
2023-02-28 12:43 ` Liu, Yi L
2023-02-27 11:11 ` [PATCH v5 12/19] vfio-iommufd: Add detach_ioas for emulated " Yi Liu
2023-02-27 18:45 ` Jason Gunthorpe
2023-02-27 11:11 ` [PATCH v5 13/19] vfio: Add cdev_device_open_cnt to vfio_group Yi Liu
2023-02-27 19:20 ` Jason Gunthorpe
2023-02-27 11:11 ` [PATCH v5 14/19] vfio: Make vfio_device_open() single open for device cdev path Yi Liu
2023-02-27 18:52 ` Jason Gunthorpe
2023-02-28 3:11 ` Liu, Yi L
2023-02-28 12:33 ` Jason Gunthorpe
2023-03-01 13:58 ` Liu, Yi L
2023-02-27 11:11 ` [PATCH v5 15/19] vfio: Add cdev for vfio_device Yi Liu
2023-02-27 18:55 ` Jason Gunthorpe
2023-02-28 3:47 ` Liu, Yi L
2023-02-27 19:06 ` Jason Gunthorpe
2023-02-28 3:59 ` Liu, Yi L
2023-02-27 11:11 ` [PATCH v5 16/19] vfio: Add VFIO_DEVICE_BIND_IOMMUFD Yi Liu
2023-02-27 19:19 ` Jason Gunthorpe
2023-02-28 4:08 ` Liu, Yi L
2023-03-01 9:19 ` Liu, Yi L
2023-03-01 17:46 ` Jason Gunthorpe
2023-03-02 4:09 ` Liu, Yi L
2023-03-03 6:57 ` Liu, Yi L
2023-03-03 7:23 ` Liu, Yi L
2023-03-07 6:38 ` Tian, Kevin
2023-03-07 12:37 ` Jason Gunthorpe
2023-03-07 13:03 ` Liu, Yi L
2023-03-08 7:17 ` Tian, Kevin
2023-03-10 2:39 ` Alexey Kardashevskiy
2023-03-10 5:49 ` Liu, Yi L
2023-02-27 11:11 ` [PATCH v5 17/19] vfio: Add VFIO_DEVICE_AT[DE]TACH_IOMMUFD_PT Yi Liu
2023-02-27 18:39 ` Jason Gunthorpe
2023-02-28 2:51 ` Liu, Yi L
2023-02-28 12:32 ` Jason Gunthorpe [this message]
2023-02-28 12:42 ` Liu, Yi L
2023-02-28 12:53 ` Jason Gunthorpe
2023-02-28 13:22 ` Liu, Yi L
2023-02-28 13:25 ` Jason Gunthorpe
2023-02-28 13:36 ` Liu, Yi L
2023-02-28 13:43 ` Jason Gunthorpe
2023-02-28 14:01 ` Liu, Yi L
2023-02-28 14:38 ` Jason Gunthorpe
2023-03-01 14:04 ` Liu, Yi L
2023-03-01 17:49 ` Jason Gunthorpe
2023-03-02 3:24 ` Liu, Yi L
2023-02-27 11:11 ` [PATCH v5 18/19] vfio: Compile group optionally Yi Liu
2023-02-27 19:20 ` Jason Gunthorpe
2023-02-28 3:14 ` Liu, Yi L
2023-02-28 6:00 ` Liu, Yi L
2023-02-28 12:36 ` Jason Gunthorpe
2023-03-01 13:59 ` Liu, Yi L
2023-02-27 11:11 ` [PATCH v5 19/19] docs: vfio: Add vfio device cdev description Yi Liu
2023-02-27 19:21 ` [PATCH v5 00/19] Add vfio_device cdev for iommufd support Jason Gunthorpe
2023-02-28 3:03 ` Liu, Yi L
2023-02-28 16:58 ` Xu, Terrence
2023-03-01 2:29 ` Nicolin Chen
2023-03-01 3:44 ` Liu, Yi L
2023-03-02 9:43 ` Shameerali Kolothum Thodi
2023-03-02 23:51 ` Nicolin Chen
2023-03-03 15:01 ` Shameerali Kolothum Thodi
2023-03-04 7:00 ` Nicolin Chen
2023-03-04 8:22 ` Liu, Yi L
2023-03-08 15:54 ` Shameerali Kolothum Thodi
2023-03-14 11:38 ` Shameerali Kolothum Thodi
2023-03-15 23:22 ` Nicolin Chen
2023-03-16 7:39 ` Liu, Yi L
2023-03-03 21:29 ` Matthew Rosato
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