linux/drivers/vfio/pci/virtio
Jason Gunthorpe 86624ba3b5 vfio/pci: Do vf_token checks for VFIO_DEVICE_BIND_IOMMUFD
This was missed during the initial implementation. The VFIO PCI encodes
the vf_token inside the device name when opening the device from the group
FD, something like:

  "0000:04:10.0 vf_token=bd8d9d2b-5a5f-4f5a-a211-f591514ba1f3"

This is used to control access to a VF unless there is co-ordination with
the owner of the PF.

Since we no longer have a device name in the cdev path, pass the token
directly through VFIO_DEVICE_BIND_IOMMUFD using an optional field
indicated by VFIO_DEVICE_BIND_FLAG_TOKEN.

Fixes: 5fcc26969a ("vfio: Add VFIO_DEVICE_BIND_IOMMUFD")
Tested-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Yi Liu <yi.l.liu@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/0-v3-bdd8716e85fe+3978a-vfio_token_jgg@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2025-08-05 15:41:14 -06:00
..
common.h vfio/virtio: Enable live migration once VIRTIO_PCI was configured 2024-11-13 16:28:32 -07:00
Kconfig vfio/virtio: Enable support for virtio-block live migration 2025-03-10 14:42:50 -06:00
legacy_io.c vfio/virtio: Enable support for virtio-block live migration 2025-03-10 14:42:50 -06:00
main.c vfio/pci: Do vf_token checks for VFIO_DEVICE_BIND_IOMMUFD 2025-08-05 15:41:14 -06:00
Makefile vfio/virtio: Enable live migration once VIRTIO_PCI was configured 2024-11-13 16:28:32 -07:00
migrate.c mm: alloc_pages_bulk: rename API 2025-01-25 20:22:31 -08:00