You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
68 lines
2.6 KiB
68 lines
2.6 KiB
From 6cde15c70c86819033337771eb522e94e3ea9e34 Mon Sep 17 00:00:00 2001
|
|
From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= <eperezma@redhat.com>
|
|
Date: Tue, 23 Aug 2022 20:20:07 +0200
|
|
Subject: [PATCH 09/23] vhost: Always store new kick fd on
|
|
vhost_svq_set_svq_kick_fd
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
RH-Author: Eugenio Pérez <eperezma@redhat.com>
|
|
RH-MergeRequest: 116: vdpa: Restore device state on destination
|
|
RH-Bugzilla: 2114060
|
|
RH-Acked-by: Cindy Lu <lulu@redhat.com>
|
|
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
|
|
RH-Commit: [8/21] a09b8851c39d7cea67414560f6d322e988b9d59a (eperezmartin/qemu-kvm)
|
|
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2114060
|
|
Upstream status: git@github.com:jasowang/qemu.git net-next
|
|
|
|
We can unbind twice a file descriptor if we call twice
|
|
vhost_svq_set_svq_kick_fd because of this. Since it comes from vhost and
|
|
not from SVQ, that file descriptor could be a different thing that
|
|
guest's vhost notifier.
|
|
|
|
Likewise, it can happens the same if a guest start and stop the device
|
|
multiple times.
|
|
|
|
Reported-by: Lei Yang <leiyang@redhat.com>
|
|
Fixes: dff4426fa6 ("vhost: Add Shadow VirtQueue kick forwarding capabilities")
|
|
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
|
|
Acked-by: Jason Wang <jasowang@redhat.com>
|
|
Signed-off-by: Jason Wang <jasowang@redhat.com>
|
|
(cherry picked from commit 6867f29c1425add7e0e8d1d8d58cc0ffbb8df0e4)
|
|
---
|
|
hw/virtio/vhost-shadow-virtqueue.c | 4 ++--
|
|
1 file changed, 2 insertions(+), 2 deletions(-)
|
|
|
|
diff --git a/hw/virtio/vhost-shadow-virtqueue.c b/hw/virtio/vhost-shadow-virtqueue.c
|
|
index e53aac45f6..f420311b89 100644
|
|
--- a/hw/virtio/vhost-shadow-virtqueue.c
|
|
+++ b/hw/virtio/vhost-shadow-virtqueue.c
|
|
@@ -602,13 +602,13 @@ void vhost_svq_set_svq_kick_fd(VhostShadowVirtqueue *svq, int svq_kick_fd)
|
|
event_notifier_set_handler(svq_kick, NULL);
|
|
}
|
|
|
|
+ event_notifier_init_fd(svq_kick, svq_kick_fd);
|
|
/*
|
|
* event_notifier_set_handler already checks for guest's notifications if
|
|
* they arrive at the new file descriptor in the switch, so there is no
|
|
* need to explicitly check for them.
|
|
*/
|
|
if (poll_start) {
|
|
- event_notifier_init_fd(svq_kick, svq_kick_fd);
|
|
event_notifier_set(svq_kick);
|
|
event_notifier_set_handler(svq_kick, vhost_handle_guest_kick_notifier);
|
|
}
|
|
@@ -655,7 +655,7 @@ void vhost_svq_start(VhostShadowVirtqueue *svq, VirtIODevice *vdev,
|
|
*/
|
|
void vhost_svq_stop(VhostShadowVirtqueue *svq)
|
|
{
|
|
- event_notifier_set_handler(&svq->svq_kick, NULL);
|
|
+ vhost_svq_set_svq_kick_fd(svq, VHOST_FILE_UNBIND);
|
|
g_autofree VirtQueueElement *next_avail_elem = NULL;
|
|
|
|
if (!svq->vq) {
|
|
--
|
|
2.31.1
|
|
|