在 2021/4/26 下午6:21, Arkadiusz Kudan 写道:
With increasing interest for virtio, NIC have appeared that provide
SRIOV with PF appearing in the host as a virtio network device
and probably more similiar NICs will emerge.
igb_uio of DPDK or pci-pf-stub can be used to provide SRIOV,
however there are hypervisors/VMMs that require VFs, which are
to be PCI passthrued to a VM, to have its PF with network
representation in the kernel. For virtio-net based PFs,
virtio-net could do that by providing both SRIOV interface and
netdev representation.
Enable SRIOV via VIRTIO_F_SR_IOV feature bit if the device
supports it.
Signed-off-by: Arkadiusz Kudan <arkadiusz.kudan@xxxxxxxxxxxx>
Signed-off-by: Miroslaw Walukiewicz <Miroslaw.Walukiewicz@xxxxxxxxx>
---
drivers/net/virtio_net.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 0824e6999e49..a03aa7e99689 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -3249,6 +3249,7 @@ static struct virtio_device_id id_table[] = {
static unsigned int features[] = {
VIRTNET_FEATURES,
+ VIRTIO_F_SR_IOV,
};
So I'm suprised that it needs to be enabled per device. We had:
static void vp_transport_features(struct virtio_device *vdev, u64 features)
{
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
struct pci_dev *pci_dev = vp_dev->pci_dev;
if ((features & BIT_ULL(VIRTIO_F_SR_IOV)) &&
pci_find_ext_capability(pci_dev,
PCI_EXT_CAP_ID_SRIOV))
__virtio_set_bit(vdev, VIRTIO_F_SR_IOV);
}
And I had used this driver for SRIOV virtio-pci hardware for more than
one year.
Thanks
static unsigned int features_legacy[] = {
_______________________________________________
Virtualization mailing list
Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
https://lists.linuxfoundation.org/mailman/listinfo/virtualization
