On 12/06/2017 12:00 AM, Stefan Hajnoczi wrote:
On Tue, Dec 05, 2017 at 11:33:14AM +0800, Wei Wang wrote:
Add a new vhost-uer protocol msg, VHOST_USER_SET_VHOST_PCI. This msg is
used to signal the vhost-pci device to start/stop working.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
---
hw/net/vhost_net.c | 37 +++++++++++++++++++++++++++++++++++++
hw/virtio/vhost-pci-slave.c | 2 +-
hw/virtio/vhost-user.c | 17 +++++++++++++++++
hw/virtio/vhost.c | 7 +++++++
include/hw/virtio/vhost-backend.h | 2 ++
include/hw/virtio/vhost-user.h | 2 ++
include/hw/virtio/vhost.h | 2 ++
include/net/vhost_net.h | 2 ++
8 files changed, 70 insertions(+), 1 deletion(-)
New protocol messages must be documented in docs/interop/vhost-user.txt.
OK, I'll add it to the doc after the discussion.
Why is a new message needed? I'm not sure why it is specific to
vhost-pci.
Yes, it might be useful for other vhost-user slave implementations.
Probably we can name it "VHOST_USER_SET_SLAVE"?
The message is used to "link up" or "link down" the slave device. For
example, when virtio-net leaves, it sends a "VHOST_USER_SET_SLAVE" msg
to the salve to link down the slave device.
(a similar msg is VHOST_USER_SET_VRING_ENABLE, but that is for virtqueue
enable/disable, not for a device level enable/disable)
Best,
Wei