If a PCIe device bound to vfio-pci happens to be SR-IOV capabale,
there is no possibility to bring up/shutdown the device's VFs.
This patch adds a generic callback for the sysfs sriov_numvfs attribute.
The attribute will only show up for SR-IOV devices. Additionally,
each utilized pci_* function checks if the device is a PF.
Signed-off-by: Andre Richter <andre.o.richter@xxxxxxxxx>
---
drivers/vfio/pci/vfio_pci.c | 25 ++++++++++++++++++++-----
1 file changed, 20 insertions(+), 5 deletions(-)
diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index f782533..2f6dfb3 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -919,12 +919,27 @@ static 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)
+{
+ int ret = 0;
+
+ if (num_vfs > 0) {
+ ret = pci_enable_sriov(pdev, num_vfs);
+ if (!ret)
+ ret = pci_num_vf(pdev);
+ } else
+ pci_disable_sriov(pdev);
+
+ return ret;
+}
+
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,
+ .sriov_configure = vfio_pci_sriov_configure,
+ .err_handler = &vfio_err_handlers,
};
/*
--
1.9.1
--
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