When a new device is added to a live VFIO group,
use driver_override to force the device to be probed by
the VFIO driver.
Signed-off-by: Ilya Lesokhin <ilyal@xxxxxxxxxxxx>
---
drivers/vfio/vfio.c | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index 6fd6fa5..32bc1b4 100644
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -646,6 +646,7 @@ static int vfio_dev_viable(struct device *dev, void *data)
static int vfio_group_nb_add_dev(struct vfio_group *group, struct device *dev)
{
struct vfio_device *device;
+ struct pci_dev *pdev;
/* Do we already know about it? We shouldn't */
device = vfio_group_get_device(group, dev);
@@ -658,10 +659,19 @@ static int vfio_group_nb_add_dev(struct vfio_group *group, struct device *dev)
if (!atomic_read(&group->container_users))
return 0;
- /* TODO Prevent device auto probing */
- WARN(1, "Device %s added to live group %d!\n", dev_name(dev),
- iommu_group_id(group->iommu_group));
-
+ if (dev_is_pci(dev)) {
+ /* a device that shares a group with another VFIO
+ * device should also be probed by VFIO
+ */
+ pdev = to_pci_dev(dev);
+ if (pdev->driver_override)
+ kfree(pdev->driver_override);
+ pdev->driver_override = kstrdup("vfio-pci", GFP_KERNEL);
+ } else {
+ /* TODO Prevent device auto probing */
+ WARN(1, "Device %s added to live group %d!\n", dev_name(dev),
+ iommu_group_id(group->iommu_group));
+ }
return 0;
}
--
1.8.3.1
--
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