External/cloud-hypervisor
1
0
Fork 0
mirror of https://github.com/cloud-hypervisor/cloud-hypervisor.git synced 2024-07-07 10:15:45 +00:00
Code Issues Packages Projects Releases Wiki Activity

vm-virtio: Improve virtio-console input processing

Browse Source 
The way the code is currently implemented, only by writing to STDIN a
user can trigger some input to reach the VM through virtio-console. But
in case, there were not enough virtio descriptors to process what was
retrieved from STDIN, the remaining bits would be transferred only if
STDIN was triggered again. The missing part is that when some
descriptors are made available from the guest, the virtio-console device
should try to send any possible remaining bits.

By triggering the function process_input_queue() whenever the guest
notifies the host that some new descriptors are ready for the receive
queue, this patch allows to fill the implementation void that was left.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf 2020-01-08 14:53:00 +01:00
parent e4c3401a33
commit 38468d3d9b
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
vm-virtio/src/console.rs
View File

@ -231,6 +231,11 @@ impl ConsoleEpollHandler {
if let Err(e) = self.input_queue_evt.read() {
error!("Failed to get queue event: {:?}", e);
break 'epoll;
} else if self.process_input_queue() {
if let Err(e) = self.signal_used_queue() {
error!("Failed to signal used queue: {:?}", e);
break 'epoll;
}
}
}
OUTPUT_QUEUE_EVENT => {