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| author | Wu Zongyong <wuzongyong@linux.alibaba.com> | 2021-10-29 17:14:44 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2021-11-01 04:30:34 -0400 |
| commit | 5bbfea1eacdf584d0d159e38c01ee190162706d9 (patch) | |
| tree | 3087c6f8c4697daaf9f682e0bf4f6d63dfd4bfc9 /drivers | |
| parent | d0ae1fbfcff48e889bf993ba16890e30f6615593 (diff) | |
| download | linux-stable-5bbfea1eacdf584d0d159e38c01ee190162706d9.tar.gz linux-stable-5bbfea1eacdf584d0d159e38c01ee190162706d9.tar.bz2 linux-stable-5bbfea1eacdf584d0d159e38c01ee190162706d9.zip | |
vp_vdpa: add vq irq offloading support
This patch implements the get_vq_irq() callback for virtio pci devices
to allow irq offloading.
Signed-off-by: Wu Zongyong <wuzongyong@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/bb091e5505db704dd620f8854a7aebc921d2a752.1635493219.git.wuzongyong@linux.alibaba.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/vdpa/virtio_pci/vp_vdpa.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/vdpa/virtio_pci/vp_vdpa.c b/drivers/vdpa/virtio_pci/vp_vdpa.c index 5bcd00246d2e..e3ff7875e123 100644 --- a/drivers/vdpa/virtio_pci/vp_vdpa.c +++ b/drivers/vdpa/virtio_pci/vp_vdpa.c @@ -76,6 +76,17 @@ static u8 vp_vdpa_get_status(struct vdpa_device *vdpa) return vp_modern_get_status(mdev); } +static int vp_vdpa_get_vq_irq(struct vdpa_device *vdpa, u16 idx) +{ + struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa); + int irq = vp_vdpa->vring[idx].irq; + + if (irq == VIRTIO_MSI_NO_VECTOR) + return -EINVAL; + + return irq; +} + static void vp_vdpa_free_irq(struct vp_vdpa *vp_vdpa) { struct virtio_pci_modern_device *mdev = &vp_vdpa->mdev; @@ -427,6 +438,7 @@ static const struct vdpa_config_ops vp_vdpa_ops = { .get_config = vp_vdpa_get_config, .set_config = vp_vdpa_set_config, .set_config_cb = vp_vdpa_set_config_cb, + .get_vq_irq = vp_vdpa_get_vq_irq, }; static void vp_vdpa_free_irq_vectors(void *data) |