Vhost-user-console device and can license fixes

This patch presents a new console device and fixes vhost-user-can
license.
vhost-device can and conosle devices will be proposed to
rust-vmm/vhost-device community, and in case of acceptace this patch
will be updated.

Bug-AGL: SPEC-4834

Change-Id: I4dcded8733195158f848bd0e4fd4f4618a378c3a
Signed-off-by: Michele Paolino <m.paolino@virtualopensystems.com>

1 files changed, 86 insertions, 0 deletions

diff --git a/meta-egvirt/recipes-extended/vhost-device-console/vhost-device-console-0.1.0/src/console.rs b/meta-egvirt/recipes-extended/vhost-device-console/vhost-device-console-0.1.0/src/console.rs
new file mode 100644
index 00000000..2e2972b2
--- /dev/null
+++ b/meta-egvirt/recipes-extended/vhost-device-console/vhost-device-console-0.1.0/src/console.rs
@@ -0,0 +1,86 @@
+// CAN backend device
+//
+// Copyright 2023 VIRTUAL OPEN SYSTEMS SAS. All Rights Reserved.
+//          Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
+//
+// SPDX-License-Identifier: Apache-2.0 or BSD-3-Clause
+
+use log::{warn, error};
+use std::sync::{Arc, RwLock};
+
+use thiserror::Error as ThisError;
+use vm_memory::{ByteValued, Le16};
+
+use crate::vhu_console::{VirtioConsoleConfig, VirtioConsoleControl};
+
+type Result<T> = std::result::Result<T, Error>;
+
+#[derive(Copy, Clone, Debug, PartialEq, ThisError)]
+pub(crate) enum Error {
+    #[error("Console not enabled yet")]
+    ConsoleNotEnabled,
+}
+
+#[derive(Debug)]
+pub(crate) struct ConsoleController {
+    config: VirtioConsoleConfig,
+    pub console_name: String,
+}
+
+impl ConsoleController {
+    // Creates a new controller corresponding to `device`.
+    pub(crate) fn new(console_name: String) -> Result<ConsoleController> {
+
+        let console_name = console_name.to_owned();
+		println!("console_name: {:?}", console_name);
+
+        Ok(ConsoleController {
+            config: VirtioConsoleConfig {
+						cols: 20.into(),
+						rows: 20.into(),
+						max_nr_ports: 1.into(),
+						emerg_wr: 64.into(),
+					},
+            console_name,
+        })
+    }
+
+    pub(crate) fn config(&self) -> &VirtioConsoleConfig {
+		log::trace!("Get config\n");
+        &self.config
+    }
+
+    pub(crate) fn operation(&self, tx_request: VirtioConsoleControl) -> Result<()> {
+		log::trace!("Console operation\n");
+		Ok(())
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_new_console_controller() {
+        let console_name = String::from("test_console");
+        let controller = ConsoleController::new(console_name.clone());
+
+        assert!(controller.is_ok());
+
+        let controller = controller.unwrap();
+        assert_eq!(controller.console_name, "test_console");
+    }
+
+    #[test]
+    fn test_console_controller_config() {
+        let console_name = String::from("test_console");
+        let controller = ConsoleController::new(console_name).unwrap();
+
+        let config = controller.config();
+        assert_eq!(config.cols, 20);
+        assert_eq!(config.rows, 20);
+        assert_eq!(config.max_nr_ports, 1);
+        assert_eq!(config.emerg_wr, 64);
+    }
+}
+