RE: [PATCH v1 8/8] vfio-iommufd: Support IO page table replacement

From: Nicolin Chen nicolinc@nvidia.com Sent: Thursday, February 2, 2023 3:05 PM

Remove the vdev->iommufd_attached check, since the kernel can internally handle a replacement of the IO page table now.

Signed-off-by: Nicolin Chen nicolinc@nvidia.com

drivers/vfio/iommufd.c | 3 --- 1 file changed, 3 deletions(-)

diff --git a/drivers/vfio/iommufd.c b/drivers/vfio/iommufd.c index 7e09defbcffe..f9e89b3eef69 100644 --- a/drivers/vfio/iommufd.c +++ b/drivers/vfio/iommufd.c @@ -111,9 +111,6 @@ int vfio_iommufd_physical_attach_ioas(struct vfio_device *vdev, u32 *pt_id) return 0; }

• if (vdev->iommufd_attached)

• return -EBUSY;
  

• rc = iommufd_device_attach(vdev->iommufd_device, pt_id); if (rc) return rc;

also update vfio uapi description to explain the replace semantics.