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| author | Marc-André Lureau <marcandre.lureau@redhat.com> | 2017-08-29 17:27:50 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2017-09-08 16:15:17 +0300 |
| commit | 35480cbfcb73143af66c8de4b444d686a46c2e88 (patch) | |
| tree | 124ca6232f5b1fbc1a688096fc0aae14944cc1b2 /contrib/libvhost-user/libvhost-user.c | |
| parent | 0b4a775188cbe411d9ce7073ea1a24b72848327e (diff) | |
| download | qemu-35480cbfcb73143af66c8de4b444d686a46c2e88.tar.gz | |
libvhost-user: support resuming vq->last_avail_idx based on used_idx
This is the same workaround as commit 523b018dde3b765, which was lost
with libvhost-user transition in commit e10e798c85c2331.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'contrib/libvhost-user/libvhost-user.c')
| -rw-r--r-- | contrib/libvhost-user/libvhost-user.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/contrib/libvhost-user/libvhost-user.c b/contrib/libvhost-user/libvhost-user.c index 35fa0c5e56..d27d6303db 100644 --- a/contrib/libvhost-user/libvhost-user.c +++ b/contrib/libvhost-user/libvhost-user.c @@ -521,6 +521,19 @@ vu_set_vring_addr_exec(VuDev *dev, VhostUserMsg *vmsg) vq->used_idx = vq->vring.used->idx; + if (vq->last_avail_idx != vq->used_idx) { + bool resume = dev->iface->queue_is_processed_in_order && + dev->iface->queue_is_processed_in_order(dev, index); + + DPRINT("Last avail index != used index: %u != %u%s\n", + vq->last_avail_idx, vq->used_idx, + resume ? ", resuming" : ""); + + if (resume) { + vq->shadow_avail_idx = vq->last_avail_idx = vq->used_idx; + } + } + return false; } |