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| author | Jason Gunthorpe <jgg@nvidia.com> | 2025-07-14 13:08:25 -0300 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2025-08-05 15:41:14 -0600 |
| commit | 86624ba3b522b6512def25534341da93356c8da4 (patch) | |
| tree | 79092057ba1b34bc2ebd802a3d14b3280336138c /include/linux/vfio.h | |
| parent | b3060198483bac43ec113c62ae3837076f61f5de (diff) | |
| download | lwn-86624ba3b522b6512def25534341da93356c8da4.tar.gz lwn-86624ba3b522b6512def25534341da93356c8da4.zip | |
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: 5fcc26969a16 ("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>
Diffstat (limited to 'include/linux/vfio.h')
| -rw-r--r-- | include/linux/vfio.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/vfio.h b/include/linux/vfio.h index 707b00772ce1..eb563f538dee 100644 --- a/include/linux/vfio.h +++ b/include/linux/vfio.h @@ -105,6 +105,9 @@ struct vfio_device { * @match: Optional device name match callback (return: 0 for no-match, >0 for * match, -errno for abort (ex. match with insufficient or incorrect * additional args) + * @match_token_uuid: Optional device token match/validation. Return 0 + * if the uuid is valid for the device, -errno otherwise. uuid is NULL + * if none was provided. * @dma_unmap: Called when userspace unmaps IOVA from the container * this device is attached to. * @device_feature: Optional, fill in the VFIO_DEVICE_FEATURE ioctl @@ -132,6 +135,7 @@ struct vfio_device_ops { int (*mmap)(struct vfio_device *vdev, struct vm_area_struct *vma); void (*request)(struct vfio_device *vdev, unsigned int count); int (*match)(struct vfio_device *vdev, char *buf); + int (*match_token_uuid)(struct vfio_device *vdev, const uuid_t *uuid); void (*dma_unmap)(struct vfio_device *vdev, u64 iova, u64 length); int (*device_feature)(struct vfio_device *device, u32 flags, void __user *arg, size_t argsz); |