This patch allows enabling and disabling SR-IOV for
devices probed by vfio-pci.
Since the devices might be assigned to an untrusted entities
we use driver_override to make sure the VFs are also
probed by the the vfio-pci driver.
Signed-off-by: Ilya Lesokhin <ilyal@xxxxxxxxxxxx>
---
drivers/vfio/pci/vfio_pci.c | 24 +++++++++++++++++++-----
1 file changed, 19 insertions(+), 5 deletions(-)
diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index d624a52..6a203a7 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -297,6 +297,7 @@ static void vfio_pci_disable(struct vfio_pci_device *vdev)
struct vfio_pci_dummy_resource *dummy_res, *tmp;
int i, bar;
+ pci_disable_sriov(pdev);
/* Stop the device from further DMA */
pci_clear_master(pdev);
@@ -1314,12 +1315,25 @@ static const struct pci_error_handlers vfio_err_handlers = {
.error_detected = vfio_pci_aer_err_detected,
};
+static int vfio_pci_sriov_configure(struct pci_dev *pdev, int num_vfs)
+{
+ if (!num_vfs) {
+ pci_disable_sriov(pdev);
+ return 0;
+ }
+
+ return pci_enable_sriov_with_override(pdev,
+ num_vfs,
+ "vfio-pci");
+}
+
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,
+ .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_pci_sriov_configure,
};
struct vfio_devices {
--
1.8.3.1
--
To unsubscribe from this list: send the line "unsubscribe linux-pci" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
