[RFC PATCH 16/24] vhost-vdpa: uAPI to get virtqueue group id
From: Jason Wang <jasowang@redhat.com>
Date: 2020-09-24 03:24:56
Also in:
kvm, lkml, netdev
Subsystem:
the rest, virtio host (vhost) · Maintainers:
Linus Torvalds, "Michael S. Tsirkin", Jason Wang
Follows the support for virtqueue group in vDPA. This patches introduces uAPI to get the virtqueue group ID for a specific virtqueue in vhost-vdpa. Signed-off-by: Jason Wang <jasowang@redhat.com> --- drivers/vhost/vdpa.c | 8 ++++++++ include/uapi/linux/vhost.h | 4 ++++ 2 files changed, 12 insertions(+)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 4d97a59824a1..a234d3783e16 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c@@ -433,6 +433,14 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd, return -EFAULT; ops->set_vq_ready(vdpa, idx, s.num); return 0; + case VHOST_VDPA_GET_VRING_GROUP: + s.index = idx; + s.num = ops->get_vq_group(vdpa, idx); + if (s.num >= vdpa->ngroups) + return -EIO; + else if (copy_to_user(argp, &s, sizeof s)) + return -EFAULT; + return 0; case VHOST_GET_VRING_BASE: r = ops->get_vq_state(v->vdpa, idx, &vq_state); if (r)
diff --git a/include/uapi/linux/vhost.h b/include/uapi/linux/vhost.h
index 99bdf50efc50..d1c4b5561fee 100644
--- a/include/uapi/linux/vhost.h
+++ b/include/uapi/linux/vhost.h@@ -147,4 +147,8 @@ /* Get the number of address spaces. */ #define VHOST_VDPA_GET_AS_NUM _IOR(VHOST_VIRTIO, 0x79, unsigned int) + +/* Get the group for a virtqueue: read index, write group in num */ +#define VHOST_VDPA_GET_VRING_GROUP _IOWR(VHOST_VIRTIO, 0x79, \ + struct vhost_vring_state) #endif
--
2.20.1
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