From beee7fdb5b56a46415a4992d28dd4c2d06eb52df Mon Sep 17 00:00:00 2001
From: Shannon Nelson <shannon.nelson@amd.com>
Date: Mon, 24 Apr 2023 15:50:31 -0700
Subject: [PATCH] vhost_vdpa: support PACKED when setting-getting vring_base
Use the right structs for PACKED or split vqs when setting and
getting the vring base.
Fixes: 4c8cf31885f6 ("vhost: introduce vDPA-based backend")
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Message-Id: <20230424225031.18947-4-shannon.nelson@amd.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
---
drivers/vhost/vdpa.c | 21 +++++++++++++++++----
1 file changed, 17 insertions(+), 4 deletions(-)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 89d5ecfe7d2e1..bf77924d5b602 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -607,7 +607,14 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd,
if (r)
return r;
- vq->last_avail_idx = vq_state.split.avail_index;
+ if (vhost_has_feature(vq, VIRTIO_F_RING_PACKED)) {
+ vq->last_avail_idx = vq_state.packed.last_avail_idx |
+ (vq_state.packed.last_avail_counter << 15);
+ vq->last_used_idx = vq_state.packed.last_used_idx |
+ (vq_state.packed.last_used_counter << 15);
+ } else {
+ vq->last_avail_idx = vq_state.split.avail_index;
+ }
break;
}
@@ -625,9 +632,15 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd,
break;
case VHOST_SET_VRING_BASE:
- vq_state.split.avail_index = vq->last_avail_idx;
- if (ops->set_vq_state(vdpa, idx, &vq_state))
- r = -EINVAL;
+ if (vhost_has_feature(vq, VIRTIO_F_RING_PACKED)) {
+ vq_state.packed.last_avail_idx = vq->last_avail_idx & 0x7fff;
+ vq_state.packed.last_avail_counter = !!(vq->last_avail_idx & 0x8000);
+ vq_state.packed.last_used_idx = vq->last_used_idx & 0x7fff;
+ vq_state.packed.last_used_counter = !!(vq->last_used_idx & 0x8000);
+ } else {
+ vq_state.split.avail_index = vq->last_avail_idx;
+ }
+ r = ops->set_vq_state(vdpa, idx, &vq_state);
break;
case VHOST_SET_VRING_CALL:
--
GitLab