| Message ID | a85ebe54c2fff9ca134a33cdf8744a7c1d66feef.1675320212.git.nicolinc@nvidia.com |
|---|---|
| State | New |
| Headers | show |
| Series | Add IO page table replacement support | expand |
> 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.
On Mon, Feb 06, 2023 at 08:49:16AM +0000, Tian, Kevin wrote: > External email: Use caution opening links or attachments > > > > 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. Will add that. Thanks!
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;
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(-)