diff options
| author | Raphael Norwitz <raphael.norwitz@nutanix.com> | 2019-10-29 17:38:02 -0400 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-01-05 07:03:03 -0500 |
| commit | d91d57e604edc128be302b60dabba6a34f0e0f0f (patch) | |
| tree | 9f47f687e83e9a1242dc139490e747d49ef308f1 /hw/virtio/vhost-user.c | |
| parent | f2a7e8f170252081ff48b99f34dbd1f0211d7938 (diff) | |
vhost-user: add VHOST_USER_RESET_DEVICE to reset devices
Add a VHOST_USER_RESET_DEVICE message which will reset the vhost user
backend. Disabling all rings, and resetting all internal state, ready
for the backend to be reinitialized.
A backend has to report it supports this features with the
VHOST_USER_PROTOCOL_F_RESET_DEVICE protocol feature bit. If it does
so, the new message is used instead of sending a RESET_OWNER which has
had inconsistent implementations.
Signed-off-by: David Vrabel <david.vrabel@nutanix.com>
Signed-off-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
Message-Id: <1572385083-5254-2-git-send-email-raphael.norwitz@nutanix.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/virtio/vhost-user.c')
| -rw-r--r-- | hw/virtio/vhost-user.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c index 02a9b25199..d27a10fcc6 100644 --- a/hw/virtio/vhost-user.c +++ b/hw/virtio/vhost-user.c @@ -58,6 +58,7 @@ enum VhostUserProtocolFeature { VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD = 10, VHOST_USER_PROTOCOL_F_HOST_NOTIFIER = 11, VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD = 12, + VHOST_USER_PROTOCOL_F_RESET_DEVICE = 13, VHOST_USER_PROTOCOL_F_MAX }; @@ -98,6 +99,7 @@ typedef enum VhostUserRequest { VHOST_USER_GET_INFLIGHT_FD = 31, VHOST_USER_SET_INFLIGHT_FD = 32, VHOST_USER_GPU_SET_SOCKET = 33, + VHOST_USER_RESET_DEVICE = 34, VHOST_USER_MAX } VhostUserRequest; @@ -890,10 +892,14 @@ static int vhost_user_set_owner(struct vhost_dev *dev) static int vhost_user_reset_device(struct vhost_dev *dev) { VhostUserMsg msg = { - .hdr.request = VHOST_USER_RESET_OWNER, .hdr.flags = VHOST_USER_VERSION, }; + msg.hdr.request = virtio_has_feature(dev->protocol_features, + VHOST_USER_PROTOCOL_F_RESET_DEVICE) + ? VHOST_USER_RESET_DEVICE + : VHOST_USER_RESET_OWNER; + if (vhost_user_write(dev, &msg, NULL, 0) < 0) { return -1; } |