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 at codilime.com>
Signed-off-by: Miroslaw Walukiewicz <Miroslaw.Walukiewicz at intel.com>
---
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,
};
static unsigned int features_legacy[] = {
--
2.31.1
--
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? 2021/4/26 ??6:21, Arkadiusz Kudan ??:> 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 at codilime.com> > Signed-off-by: Miroslaw Walukiewicz <Miroslaw.Walukiewicz at intel.com> > --- > 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[] = {