From: Liang-Min Wang <liang-min.wang@xxxxxxxxx>
When a SR-IOV supported device is bound with vfio-pci, the driver
could not create SR-IOV instance through /sys/bus/pci/devices/...
/sriov_numvfs. This patch re-activates this capability for a PCIe
device that supports SR-IOV and is bound with vfio-pci.ko.
Signed-off-by: Liang-Min Wang <liang-min.wang@xxxxxxxxx>
---
drivers/vfio/pci/vfio_pci.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index f041b1a6cf66..8fbd362607e1 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -1256,6 +1256,7 @@ static void vfio_pci_remove(struct pci_dev *pdev)
if (!vdev)
return;
+ pci_disable_sriov(pdev);
vfio_iommu_group_put(pdev->dev.iommu_group, &pdev->dev);
kfree(vdev->region);
kfree(vdev);
@@ -1303,12 +1304,23 @@ static const struct pci_error_handlers vfio_err_handlers = {
.error_detected = vfio_pci_aer_err_detected,
};
+static int vfio_sriov_configure(struct pci_dev *pdev, int num_vfs)
+{
+ if (!num_vfs) {
+ pci_disable_sriov(pdev);
+ return 0;
+ }
+
+ return pci_enable_sriov(pdev, num_vfs);
+}
+
static struct pci_driver vfio_pci_driver = {
.name = "vfio-pci",
.id_table = NULL, /* only dynamic ids */
.probe = vfio_pci_probe,
.remove = vfio_pci_remove,
.err_handler = &vfio_err_handlers,
+ .sriov_configure = vfio_sriov_configure,
};
struct vfio_devices {
--
2.14.2
