[PATCH 15/21] vhost-vdpa: introduce uAPI to set group ASID
From: Jason Wang <jasowang@redhat.com>
Date: 2020-12-16 06:52:00
Also in:
kvm, lkml, virtualization
Subsystem:
the rest, virtio host (vhost) · Maintainers:
Linus Torvalds, "Michael S. Tsirkin", Jason Wang
Follows the vDPA support for associating ASID to a specific virtqueue group. This patch adds a uAPI to support setting them from userspace. Signed-off-by: Jason Wang <jasowang@redhat.com> --- drivers/vhost/vdpa.c | 8 ++++++++ include/uapi/linux/vhost.h | 7 +++++++ 2 files changed, 15 insertions(+)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index e7023abda12c..cd7c9a401a61 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c@@ -450,6 +450,14 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd, else if (copy_to_user(argp, &s, sizeof s)) return -EFAULT; return 0; + case VHOST_VDPA_SET_GROUP_ASID: + if (copy_from_user(&s, argp, sizeof(s))) + return -EFAULT; + if (s.num >= vdpa->nas) + return -EINVAL; + if (!ops->set_group_asid) + return -ENOTSUPP; + return ops->set_group_asid(vdpa, idx, s.num); 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 99de06476fdc..5e083490f1aa 100644
--- a/include/uapi/linux/vhost.h
+++ b/include/uapi/linux/vhost.h@@ -158,4 +158,11 @@ */ #define VHOST_VDPA_GET_VRING_GROUP _IOWR(VHOST_VIRTIO, 0x7B, \ struct vhost_vring_state) +/* Set the ASID for a virtqueue group. The group index is stored in + * the index field of vhost_vring_state, the ASID associated with this + * group is stored at num field of vhost_vring_state. + */ +#define VHOST_VDPA_SET_GROUP_ASID _IOW(VHOST_VIRTIO, 0x7C, \ + struct vhost_vring_state) + #endif
--
2.25.1