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[Qemu-devel] [PATCHv2 3/3] virtio-serial-bus: on migration send status o
From: |
Alon Levy |
Subject: |
[Qemu-devel] [PATCHv2 3/3] virtio-serial-bus: on migration send status of pending ports bh |
Date: |
Thu, 28 Apr 2011 15:04:14 +0300 |
migration protocol bumped to 4, adding a single byte per port which is 1 if
there is a bh scheduled, 0 otherwise.
---
hw/virtio-serial-bus.c | 14 +++++++++++---
1 files changed, 11 insertions(+), 3 deletions(-)
diff --git a/hw/virtio-serial-bus.c b/hw/virtio-serial-bus.c
index 8556e08..7fb8ade 100644
--- a/hw/virtio-serial-bus.c
+++ b/hw/virtio-serial-bus.c
@@ -536,7 +536,7 @@ static void virtio_serial_save(QEMUFile *f, void *opaque)
qemu_put_byte(f, port->guest_connected);
qemu_put_byte(f, port->host_connected);
- elem_popped = 0;
+ elem_popped = 0;
if (port->elem.out_num) {
elem_popped = 1;
}
@@ -548,6 +548,8 @@ static void virtio_serial_save(QEMUFile *f, void *opaque)
qemu_put_buffer(f, (unsigned char *)&port->elem,
sizeof(port->elem));
}
+ /* Pending bh */
+ qemu_put_byte(f, !!qemu_bh_is_scheduled(port->bh));
}
}
@@ -558,7 +560,7 @@ static int virtio_serial_load(QEMUFile *f, void *opaque,
int version_id)
uint32_t max_nr_ports, nr_active_ports, ports_map;
unsigned int i;
- if (version_id > 3) {
+ if (version_id > 4) {
return -EINVAL;
}
@@ -637,7 +639,13 @@ static int virtio_serial_load(QEMUFile *f, void *opaque,
int version_id)
virtio_serial_throttle_port(port, false);
}
}
+ if (version_id > 3) {
+ if (qemu_get_byte(f)) {
+ qemu_bh_schedule(port->bh);
+ }
+ }
}
+
return 0;
}
@@ -889,7 +897,7 @@ VirtIODevice *virtio_serial_init(DeviceState *dev,
virtio_serial_conf *conf)
* Register for the savevm section with the virtio-console name
* to preserve backward compat
*/
- register_savevm(dev, "virtio-console", -1, 3, virtio_serial_save,
+ register_savevm(dev, "virtio-console", -1, 4, virtio_serial_save,
virtio_serial_load, vser);
return vdev;
--
1.7.4.4