vfio: simplify iommu group allocation for mediated devices

Reuse the logic in vfio_noiommu_group_alloc to allocate a fake
single-device iommu group for mediated devices by factoring out a common
function, and replacing the noiommu boolean field in struct vfio_group
with an enum to distinguish the three different kinds of groups.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20210924155705.4258-8-hch@lst.de
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

3 files changed, 3 insertions, 3 deletions

diff --git a/samples/vfio-mdev/mbochs.c b/samples/vfio-mdev/mbochs.c
index c313ab4d1f4e..cd41bec5fdeb 100644
--- a/samples/vfio-mdev/mbochs.c
+++ b/samples/vfio-mdev/mbochs.c
@@ -553,7 +553,7 @@ static int mbochs_probe(struct mdev_device *mdev)
 	mbochs_create_config_space(mdev_state);
 	mbochs_reset(mdev_state);
 
-	ret = vfio_register_group_dev(&mdev_state->vdev);
+	ret = vfio_register_emulated_iommu_dev(&mdev_state->vdev);
 	if (ret)
 		goto err_mem;
 	dev_set_drvdata(&mdev->dev, mdev_state);
diff --git a/samples/vfio-mdev/mdpy.c b/samples/vfio-mdev/mdpy.c
index 8d1a80a0722a..fe5d43e797b6 100644
--- a/samples/vfio-mdev/mdpy.c
+++ b/samples/vfio-mdev/mdpy.c
@@ -258,7 +258,7 @@ static int mdpy_probe(struct mdev_device *mdev)
 
 	mdpy_count++;
 
-	ret = vfio_register_group_dev(&mdev_state->vdev);
+	ret = vfio_register_emulated_iommu_dev(&mdev_state->vdev);
 	if (ret)
 		goto err_mem;
 	dev_set_drvdata(&mdev->dev, mdev_state);
diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c
index 5983cdb16e3d..a0e1a469bd47 100644
--- a/samples/vfio-mdev/mtty.c
+++ b/samples/vfio-mdev/mtty.c
@@ -741,7 +741,7 @@ static int mtty_probe(struct mdev_device *mdev)
 
 	mtty_create_config_space(mdev_state);
 
-	ret = vfio_register_group_dev(&mdev_state->vdev);
+	ret = vfio_register_emulated_iommu_dev(&mdev_state->vdev);
 	if (ret)
 		goto err_vconfig;
 	dev_set_drvdata(&mdev->dev, mdev_state);