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[Qemu-devel] [RFC PATCH 1/1] virtio-serial-bus: Unset guest_connected at
From: |
Amit Shah |
Subject: |
[Qemu-devel] [RFC PATCH 1/1] virtio-serial-bus: Unset guest_connected at reset and driver reset |
Date: |
Tue, 24 Apr 2012 19:39:27 +0530 |
When a guest driver resets the virtio status to not ready, or when qemu
is reset, reset the guest_connected bit and let ports know if they have
the guest_close() callback registered.
Signed-off-by: Amit Shah <address@hidden>
---
hw/virtio-serial-bus.c | 28 ++++++++++++++++++++++++++++
1 files changed, 28 insertions(+), 0 deletions(-)
diff --git a/hw/virtio-serial-bus.c b/hw/virtio-serial-bus.c
index 796224b..ffbdfc2 100644
--- a/hw/virtio-serial-bus.c
+++ b/hw/virtio-serial-bus.c
@@ -528,6 +528,22 @@ static void set_config(VirtIODevice *vdev, const uint8_t
*config_data)
memcpy(&config, config_data, sizeof(config));
}
+static void guest_reset(VirtIOSerial *vser)
+{
+ VirtIOSerialPort *port;
+ VirtIOSerialPortClass *vsc;
+
+ QTAILQ_FOREACH(port, &vser->ports, next) {
+ vsc = VIRTIO_SERIAL_PORT_GET_CLASS(port);
+ if (port->guest_connected) {
+ port->guest_connected = false;
+
+ if (vsc->guest_close)
+ vsc->guest_close(port);
+ }
+ }
+}
+
static void set_status(VirtIODevice *vdev, uint8_t status)
{
VirtIOSerial *vser;
@@ -546,6 +562,17 @@ static void set_status(VirtIODevice *vdev, uint8_t status)
*/
port->guest_connected = true;
}
+ if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) {
+ guest_reset(vser);
+ }
+}
+
+static void vser_reset(VirtIODevice *vdev)
+{
+ VirtIOSerial *vser;
+
+ vser = DO_UPCAST(VirtIOSerial, vdev, vdev);
+ guest_reset(vser);
}
static void virtio_serial_save(QEMUFile *f, void *opaque)
@@ -918,6 +945,7 @@ VirtIODevice *virtio_serial_init(DeviceState *dev,
virtio_serial_conf *conf)
vser->vdev.get_config = get_config;
vser->vdev.set_config = set_config;
vser->vdev.set_status = set_status;
+ vser->vdev.reset = vser_reset;
vser->qdev = dev;
--
1.7.7.6
- [Qemu-devel] [RFC PATCH 1/1] virtio-serial-bus: Unset guest_connected at reset and driver reset,
Amit Shah <=