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| author |   Tiwei Bie <tiwei.bie@intel.com> | 2018-06-01 12:02:39 +0800 |
|---|---|---|
| committer |   Michael S. Tsirkin <mst@redhat.com> | 2018-06-12 04:59:29 +0300 |
| commit | cfecc2918d2b3c5e86ff1a6c95eabbbb17bb8fd3 (patch) | |
| tree | e1d6119d7345b602e538f1eb6be11ad432e4ee3c /drivers/virtio/virtio_pci_modern.c | |
| parent | vhost: fix info leak due to uninitialized memory (diff) | |
| download | linux-dev-cfecc2918d2b3c5e86ff1a6c95eabbbb17bb8fd3.tar.xz linux-dev-cfecc2918d2b3c5e86ff1a6c95eabbbb17bb8fd3.zip | |
virtio_pci: support enabling VFs
There is a new feature bit allocated in virtio spec to
support SR-IOV (Single Root I/O Virtualization):
https://github.com/oasis-tcs/virtio-spec/issues/11
This patch enables the support for this feature bit in
virtio driver.
Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/virtio/virtio_pci_modern.c')
| -rw-r--r-- | drivers/virtio/virtio_pci_modern.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c index 2555d80f6eec..07571daccfec 100644 --- a/drivers/virtio/virtio_pci_modern.c +++ b/drivers/virtio/virtio_pci_modern.c @@ -153,14 +153,28 @@ static u64 vp_get_features(struct virtio_device *vdev) return features; } +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); +} + /* virtio config->finalize_features() implementation */ static int vp_finalize_features(struct virtio_device *vdev) { struct virtio_pci_device *vp_dev = to_vp_device(vdev); + u64 features = vdev->features; /* Give virtio_ring a chance to accept features. */ vring_transport_features(vdev); + /* Give virtio_pci a chance to accept features. */ + vp_transport_features(vdev, features); + if (!__virtio_test_bit(vdev, VIRTIO_F_VERSION_1)) { dev_err(&vdev->dev, "virtio: device uses modern interface " "but does not have VIRTIO_F_VERSION_1\n"); |