virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
/*
|
|
|
|
* A bus for connecting virtio serial and console ports
|
|
|
|
*
|
2010-04-27 16:34:02 +04:00
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|
* Copyright (C) 2009, 2010 Red Hat, Inc.
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
*
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|
|
|
* Author(s):
|
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|
|
* Amit Shah <amit.shah@redhat.com>
|
|
|
|
*
|
|
|
|
* Some earlier parts are:
|
|
|
|
* Copyright IBM, Corp. 2008
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|
* authored by
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|
|
* Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
|
|
|
|
*
|
|
|
|
* This work is licensed under the terms of the GNU GPL, version 2. See
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|
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* the COPYING file in the top-level directory.
|
2012-01-13 20:44:23 +04:00
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|
|
*
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|
|
|
* Contributions after 2012-01-13 are licensed under the terms of the
|
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|
|
* GNU GPL, version 2 or (at your option) any later version.
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
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*/
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2012-12-17 21:20:00 +04:00
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#include "qemu/iov.h"
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2012-12-17 21:19:49 +04:00
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#include "monitor/monitor.h"
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2012-12-17 21:20:00 +04:00
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#include "qemu/queue.h"
|
2013-02-04 18:40:22 +04:00
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#include "hw/sysbus.h"
|
2011-07-05 15:06:39 +04:00
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|
#include "trace.h"
|
2013-02-05 20:06:20 +04:00
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#include "hw/virtio/virtio-serial.h"
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
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static VirtIOSerialPort *find_port_by_id(VirtIOSerial *vser, uint32_t id)
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|
|
{
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VirtIOSerialPort *port;
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2010-04-27 16:33:59 +04:00
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if (id == VIRTIO_CONSOLE_BAD_ID) {
|
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|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
QTAILQ_FOREACH(port, &vser->ports, next) {
|
|
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|
if (port->id == id)
|
|
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|
return port;
|
|
|
|
}
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|
return NULL;
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|
|
|
}
|
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|
|
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static VirtIOSerialPort *find_port_by_vq(VirtIOSerial *vser, VirtQueue *vq)
|
|
|
|
{
|
|
|
|
VirtIOSerialPort *port;
|
|
|
|
|
|
|
|
QTAILQ_FOREACH(port, &vser->ports, next) {
|
|
|
|
if (port->ivq == vq || port->ovq == vq)
|
|
|
|
return port;
|
|
|
|
}
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2010-01-19 22:06:53 +03:00
|
|
|
static bool use_multiport(VirtIOSerial *vser)
|
|
|
|
{
|
2013-04-09 16:53:35 +04:00
|
|
|
VirtIODevice *vdev = VIRTIO_DEVICE(vser);
|
|
|
|
return vdev->guest_features & (1 << VIRTIO_CONSOLE_F_MULTIPORT);
|
2010-01-19 22:06:53 +03:00
|
|
|
}
|
|
|
|
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
static size_t write_to_port(VirtIOSerialPort *port,
|
|
|
|
const uint8_t *buf, size_t size)
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|
|
|
{
|
|
|
|
VirtQueueElement elem;
|
|
|
|
VirtQueue *vq;
|
2010-04-27 16:34:05 +04:00
|
|
|
size_t offset;
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
|
|
|
|
vq = port->ivq;
|
|
|
|
if (!virtio_queue_ready(vq)) {
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-04-27 16:34:05 +04:00
|
|
|
offset = 0;
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
while (offset < size) {
|
2010-04-27 16:34:05 +04:00
|
|
|
size_t len;
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
|
|
|
|
if (!virtqueue_pop(vq, &elem)) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
change iov_* function prototypes to be more appropriate
Reorder arguments to be more natural, readable and
consistent with other iov_* functions, and change
argument names, from:
iov_from_buf(iov, iov_cnt, buf, iov_off, size)
to
iov_from_buf(iov, iov_cnt, offset, buf, bytes)
The result becomes natural English:
copy data to this `iov' vector with `iov_cnt'
elements starting at byte offset `offset'
from memory buffer `buf', processing `bytes'
bytes max.
(Try to read the original prototype this way).
Also change iov_clear() to more general iov_memset()
(it uses memset() internally anyway).
While at it, add comments to the header file
describing what the routines actually does.
The patch only renames argumens in the header, but
keeps old names in the implementation. The next
patch will touch actual code to match.
Now, it might look wrong to pay so much attention
to so small things. But we've so many badly designed
interfaces already so the whole thing becomes rather
confusing or error prone. One example of this is
previous commit and small discussion which emerged
from it, with an outcome that the utility functions
like these aren't well-understdandable, leading to
strange usage cases. That's why I paid quite some
attention to this set of functions and a few
others in subsequent patches.
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2012-03-11 18:05:12 +04:00
|
|
|
len = iov_from_buf(elem.in_sg, elem.in_num, 0,
|
|
|
|
buf + offset, size - offset);
|
2010-04-27 16:34:05 +04:00
|
|
|
offset += len;
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
|
|
|
|
virtqueue_push(vq, &elem, len);
|
|
|
|
}
|
|
|
|
|
2013-04-09 16:53:35 +04:00
|
|
|
virtio_notify(VIRTIO_DEVICE(port->vser), vq);
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
return offset;
|
|
|
|
}
|
|
|
|
|
2011-01-07 12:03:36 +03:00
|
|
|
static void discard_vq_data(VirtQueue *vq, VirtIODevice *vdev)
|
2010-04-27 16:34:10 +04:00
|
|
|
{
|
|
|
|
VirtQueueElement elem;
|
|
|
|
|
2011-02-04 11:54:18 +03:00
|
|
|
if (!virtio_queue_ready(vq)) {
|
|
|
|
return;
|
|
|
|
}
|
2011-01-07 12:03:36 +03:00
|
|
|
while (virtqueue_pop(vq, &elem)) {
|
|
|
|
virtqueue_push(vq, &elem, 0);
|
|
|
|
}
|
|
|
|
virtio_notify(vdev, vq);
|
|
|
|
}
|
|
|
|
|
2010-04-27 16:34:11 +04:00
|
|
|
static void do_flush_queued_data(VirtIOSerialPort *port, VirtQueue *vq,
|
2011-01-07 12:03:36 +03:00
|
|
|
VirtIODevice *vdev)
|
2010-04-27 16:34:10 +04:00
|
|
|
{
|
2011-12-04 22:38:12 +04:00
|
|
|
VirtIOSerialPortClass *vsc;
|
2011-05-25 16:21:13 +04:00
|
|
|
|
2011-01-07 12:03:36 +03:00
|
|
|
assert(port);
|
2010-07-01 13:28:17 +04:00
|
|
|
assert(virtio_queue_ready(vq));
|
2010-04-27 16:34:10 +04:00
|
|
|
|
2011-12-04 22:38:12 +04:00
|
|
|
vsc = VIRTIO_SERIAL_PORT_GET_CLASS(port);
|
2011-05-25 16:21:13 +04:00
|
|
|
|
2010-12-10 14:21:14 +03:00
|
|
|
while (!port->throttled) {
|
2010-12-10 14:59:49 +03:00
|
|
|
unsigned int i;
|
2010-04-27 16:34:10 +04:00
|
|
|
|
2010-12-10 14:21:14 +03:00
|
|
|
/* Pop an elem only if we haven't left off a previous one mid-way */
|
|
|
|
if (!port->elem.out_num) {
|
|
|
|
if (!virtqueue_pop(vq, &port->elem)) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
port->iov_idx = 0;
|
|
|
|
port->iov_offset = 0;
|
|
|
|
}
|
2010-04-27 16:34:10 +04:00
|
|
|
|
2010-12-10 14:21:14 +03:00
|
|
|
for (i = port->iov_idx; i < port->elem.out_num; i++) {
|
|
|
|
size_t buf_size;
|
|
|
|
ssize_t ret;
|
|
|
|
|
|
|
|
buf_size = port->elem.out_sg[i].iov_len - port->iov_offset;
|
2011-12-04 22:38:12 +04:00
|
|
|
ret = vsc->have_data(port,
|
2011-05-25 16:21:13 +04:00
|
|
|
port->elem.out_sg[i].iov_base
|
|
|
|
+ port->iov_offset,
|
|
|
|
buf_size);
|
2013-03-05 21:51:35 +04:00
|
|
|
if (port->throttled) {
|
2010-12-10 14:21:14 +03:00
|
|
|
port->iov_idx = i;
|
|
|
|
if (ret > 0) {
|
|
|
|
port->iov_offset += ret;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
port->iov_offset = 0;
|
2010-04-27 16:34:10 +04:00
|
|
|
}
|
2010-12-10 14:21:14 +03:00
|
|
|
if (port->throttled) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
virtqueue_push(vq, &port->elem, 0);
|
|
|
|
port->elem.out_num = 0;
|
2010-04-27 16:34:10 +04:00
|
|
|
}
|
|
|
|
virtio_notify(vdev, vq);
|
|
|
|
}
|
|
|
|
|
2011-01-07 12:03:36 +03:00
|
|
|
static void flush_queued_data(VirtIOSerialPort *port)
|
2010-04-27 16:34:11 +04:00
|
|
|
{
|
2010-04-30 15:13:55 +04:00
|
|
|
assert(port);
|
2010-04-27 16:34:11 +04:00
|
|
|
|
2010-07-01 13:28:16 +04:00
|
|
|
if (!virtio_queue_ready(port->ovq)) {
|
|
|
|
return;
|
|
|
|
}
|
2013-04-09 16:53:35 +04:00
|
|
|
do_flush_queued_data(port, port->ovq, VIRTIO_DEVICE(port->vser));
|
2010-04-27 16:34:11 +04:00
|
|
|
}
|
|
|
|
|
2012-12-12 16:56:09 +04:00
|
|
|
static size_t send_control_msg(VirtIOSerial *vser, void *buf, size_t len)
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
{
|
|
|
|
VirtQueueElement elem;
|
|
|
|
VirtQueue *vq;
|
|
|
|
|
2012-12-12 16:56:09 +04:00
|
|
|
vq = vser->c_ivq;
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
if (!virtio_queue_ready(vq)) {
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
if (!virtqueue_pop(vq, &elem)) {
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
memcpy(elem.in_sg[0].iov_base, buf, len);
|
|
|
|
|
|
|
|
virtqueue_push(vq, &elem, len);
|
2013-04-09 16:53:35 +04:00
|
|
|
virtio_notify(VIRTIO_DEVICE(vser), vq);
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
2012-12-12 16:56:09 +04:00
|
|
|
static size_t send_control_event(VirtIOSerial *vser, uint32_t port_id,
|
|
|
|
uint16_t event, uint16_t value)
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
{
|
|
|
|
struct virtio_console_control cpkt;
|
|
|
|
|
2012-12-12 16:56:09 +04:00
|
|
|
stl_p(&cpkt.id, port_id);
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
stw_p(&cpkt.event, event);
|
|
|
|
stw_p(&cpkt.value, value);
|
|
|
|
|
2012-12-12 16:56:09 +04:00
|
|
|
trace_virtio_serial_send_control_event(port_id, event, value);
|
|
|
|
return send_control_msg(vser, &cpkt, sizeof(cpkt));
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Functions for use inside qemu to open and read from/write to ports */
|
|
|
|
int virtio_serial_open(VirtIOSerialPort *port)
|
|
|
|
{
|
2010-01-19 22:06:53 +03:00
|
|
|
/* Don't allow opening an already-open port */
|
|
|
|
if (port->host_connected) {
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
/* Send port open notification to the guest */
|
|
|
|
port->host_connected = true;
|
2012-12-12 16:56:09 +04:00
|
|
|
send_control_event(port->vser, port->id, VIRTIO_CONSOLE_PORT_OPEN, 1);
|
2010-01-19 22:06:53 +03:00
|
|
|
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int virtio_serial_close(VirtIOSerialPort *port)
|
|
|
|
{
|
2010-01-19 22:06:53 +03:00
|
|
|
port->host_connected = false;
|
2010-04-27 16:34:11 +04:00
|
|
|
/*
|
|
|
|
* If there's any data the guest sent which the app didn't
|
|
|
|
* consume, reset the throttling flag and discard the data.
|
|
|
|
*/
|
|
|
|
port->throttled = false;
|
2013-04-09 16:53:35 +04:00
|
|
|
discard_vq_data(port->ovq, VIRTIO_DEVICE(port->vser));
|
2010-04-27 16:34:11 +04:00
|
|
|
|
2012-12-12 16:56:09 +04:00
|
|
|
send_control_event(port->vser, port->id, VIRTIO_CONSOLE_PORT_OPEN, 0);
|
2010-01-19 22:06:53 +03:00
|
|
|
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Individual ports/apps call this function to write to the guest. */
|
|
|
|
ssize_t virtio_serial_write(VirtIOSerialPort *port, const uint8_t *buf,
|
|
|
|
size_t size)
|
|
|
|
{
|
2010-01-19 22:06:53 +03:00
|
|
|
if (!port || !port->host_connected || !port->guest_connected) {
|
|
|
|
return 0;
|
|
|
|
}
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
return write_to_port(port, buf, size);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Readiness of the guest to accept data on a port.
|
|
|
|
* Returns max. data the guest can receive
|
|
|
|
*/
|
|
|
|
size_t virtio_serial_guest_ready(VirtIOSerialPort *port)
|
|
|
|
{
|
2013-04-09 16:53:35 +04:00
|
|
|
VirtIODevice *vdev = VIRTIO_DEVICE(port->vser);
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
VirtQueue *vq = port->ivq;
|
2012-09-24 22:35:16 +04:00
|
|
|
unsigned int bytes;
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
|
|
|
|
if (!virtio_queue_ready(vq) ||
|
2013-04-09 16:53:35 +04:00
|
|
|
!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) ||
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
virtio_queue_empty(vq)) {
|
|
|
|
return 0;
|
|
|
|
}
|
2010-01-19 22:06:53 +03:00
|
|
|
if (use_multiport(port->vser) && !port->guest_connected) {
|
|
|
|
return 0;
|
|
|
|
}
|
2012-11-30 02:02:56 +04:00
|
|
|
virtqueue_get_avail_bytes(vq, &bytes, NULL, 4096, 0);
|
2012-09-24 22:35:16 +04:00
|
|
|
return bytes;
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
}
|
|
|
|
|
2011-04-29 15:25:06 +04:00
|
|
|
static void flush_queued_data_bh(void *opaque)
|
|
|
|
{
|
|
|
|
VirtIOSerialPort *port = opaque;
|
|
|
|
|
|
|
|
flush_queued_data(port);
|
|
|
|
}
|
|
|
|
|
2010-04-27 16:34:11 +04:00
|
|
|
void virtio_serial_throttle_port(VirtIOSerialPort *port, bool throttle)
|
|
|
|
{
|
|
|
|
if (!port) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2011-07-05 15:06:39 +04:00
|
|
|
trace_virtio_serial_throttle_port(port->id, throttle);
|
2010-04-27 16:34:11 +04:00
|
|
|
port->throttled = throttle;
|
|
|
|
if (throttle) {
|
|
|
|
return;
|
|
|
|
}
|
2011-04-29 15:25:06 +04:00
|
|
|
qemu_bh_schedule(port->bh);
|
2010-04-27 16:34:11 +04:00
|
|
|
}
|
|
|
|
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
/* Guest wants to notify us of some event */
|
2010-04-27 16:34:07 +04:00
|
|
|
static void handle_control_message(VirtIOSerial *vser, void *buf, size_t len)
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
{
|
|
|
|
struct VirtIOSerialPort *port;
|
2011-12-04 22:38:12 +04:00
|
|
|
VirtIOSerialPortClass *vsc;
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
struct virtio_console_control cpkt, *gcpkt;
|
2010-01-19 22:06:54 +03:00
|
|
|
uint8_t *buffer;
|
|
|
|
size_t buffer_len;
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
|
|
|
|
gcpkt = buf;
|
|
|
|
|
2010-04-27 16:34:07 +04:00
|
|
|
if (len < sizeof(cpkt)) {
|
|
|
|
/* The guest sent an invalid control packet */
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
cpkt.event = lduw_p(&gcpkt->event);
|
|
|
|
cpkt.value = lduw_p(&gcpkt->value);
|
|
|
|
|
2011-07-05 15:06:39 +04:00
|
|
|
trace_virtio_serial_handle_control_message(cpkt.event, cpkt.value);
|
|
|
|
|
virtio-serial: Fix segfault on guest boot
If I start qemu with:
# qemu -hda disks/test.img -enable-kvm -m 1G -snapshot \
-device virtio-serial \
-chardev socket,host=localhost,port=1234,server,nowait,id=foo \
-device virtserialport,chardev=foo,name=org.qemu.guest_agent
I get a segfault when booting a Fedora 14 guest. The backtrace says:
Program terminated with signal 11, Segmentation fault.
#0 0x0000000000420850 in handle_control_message (vser=0x3732bd0, buf=0x2c173e0, len=8) at /home/lcapitulino/src/qmp-unstable/hw/virtio-serial-bus.c:335
335 info = DO_UPCAST(VirtIOSerialPortInfo, qdev, port->dev.info);
What's happening is VIRTIO_CONSOLE_DEVICE_READY is a message for the
whole device, not for an individual port. So port is NULL. This bug was
introduced by commit a15bb0d6a981de749452a5180fc8084d625671da.
This commit fixes that by making the port returned by find_port_by_id()
be used only by the VIRTIO_CONSOLE_PORT_READY and
VIRTIO_CONSOLE_PORT_OPEN messages.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
2011-06-17 22:58:08 +04:00
|
|
|
if (cpkt.event == VIRTIO_CONSOLE_DEVICE_READY) {
|
2010-04-27 16:34:03 +04:00
|
|
|
if (!cpkt.value) {
|
2011-06-22 16:03:54 +04:00
|
|
|
error_report("virtio-serial-bus: Guest failure in adding device %s",
|
2011-05-25 16:21:10 +04:00
|
|
|
vser->bus.qbus.name);
|
virtio-serial: Fix segfault on guest boot
If I start qemu with:
# qemu -hda disks/test.img -enable-kvm -m 1G -snapshot \
-device virtio-serial \
-chardev socket,host=localhost,port=1234,server,nowait,id=foo \
-device virtserialport,chardev=foo,name=org.qemu.guest_agent
I get a segfault when booting a Fedora 14 guest. The backtrace says:
Program terminated with signal 11, Segmentation fault.
#0 0x0000000000420850 in handle_control_message (vser=0x3732bd0, buf=0x2c173e0, len=8) at /home/lcapitulino/src/qmp-unstable/hw/virtio-serial-bus.c:335
335 info = DO_UPCAST(VirtIOSerialPortInfo, qdev, port->dev.info);
What's happening is VIRTIO_CONSOLE_DEVICE_READY is a message for the
whole device, not for an individual port. So port is NULL. This bug was
introduced by commit a15bb0d6a981de749452a5180fc8084d625671da.
This commit fixes that by making the port returned by find_port_by_id()
be used only by the VIRTIO_CONSOLE_PORT_READY and
VIRTIO_CONSOLE_PORT_OPEN messages.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
2011-06-17 22:58:08 +04:00
|
|
|
return;
|
2010-04-27 16:34:03 +04:00
|
|
|
}
|
2010-04-27 16:33:59 +04:00
|
|
|
/*
|
|
|
|
* The device is up, we can now tell the device about all the
|
|
|
|
* ports we have here.
|
|
|
|
*/
|
|
|
|
QTAILQ_FOREACH(port, &vser->ports, next) {
|
2012-12-12 16:56:09 +04:00
|
|
|
send_control_event(vser, port->id, VIRTIO_CONSOLE_PORT_ADD, 1);
|
2010-04-27 16:33:59 +04:00
|
|
|
}
|
virtio-serial: Fix segfault on guest boot
If I start qemu with:
# qemu -hda disks/test.img -enable-kvm -m 1G -snapshot \
-device virtio-serial \
-chardev socket,host=localhost,port=1234,server,nowait,id=foo \
-device virtserialport,chardev=foo,name=org.qemu.guest_agent
I get a segfault when booting a Fedora 14 guest. The backtrace says:
Program terminated with signal 11, Segmentation fault.
#0 0x0000000000420850 in handle_control_message (vser=0x3732bd0, buf=0x2c173e0, len=8) at /home/lcapitulino/src/qmp-unstable/hw/virtio-serial-bus.c:335
335 info = DO_UPCAST(VirtIOSerialPortInfo, qdev, port->dev.info);
What's happening is VIRTIO_CONSOLE_DEVICE_READY is a message for the
whole device, not for an individual port. So port is NULL. This bug was
introduced by commit a15bb0d6a981de749452a5180fc8084d625671da.
This commit fixes that by making the port returned by find_port_by_id()
be used only by the VIRTIO_CONSOLE_PORT_READY and
VIRTIO_CONSOLE_PORT_OPEN messages.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
2011-06-17 22:58:08 +04:00
|
|
|
return;
|
|
|
|
}
|
2010-04-27 16:33:59 +04:00
|
|
|
|
virtio-serial: Fix segfault on guest boot
If I start qemu with:
# qemu -hda disks/test.img -enable-kvm -m 1G -snapshot \
-device virtio-serial \
-chardev socket,host=localhost,port=1234,server,nowait,id=foo \
-device virtserialport,chardev=foo,name=org.qemu.guest_agent
I get a segfault when booting a Fedora 14 guest. The backtrace says:
Program terminated with signal 11, Segmentation fault.
#0 0x0000000000420850 in handle_control_message (vser=0x3732bd0, buf=0x2c173e0, len=8) at /home/lcapitulino/src/qmp-unstable/hw/virtio-serial-bus.c:335
335 info = DO_UPCAST(VirtIOSerialPortInfo, qdev, port->dev.info);
What's happening is VIRTIO_CONSOLE_DEVICE_READY is a message for the
whole device, not for an individual port. So port is NULL. This bug was
introduced by commit a15bb0d6a981de749452a5180fc8084d625671da.
This commit fixes that by making the port returned by find_port_by_id()
be used only by the VIRTIO_CONSOLE_PORT_READY and
VIRTIO_CONSOLE_PORT_OPEN messages.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
2011-06-17 22:58:08 +04:00
|
|
|
port = find_port_by_id(vser, ldl_p(&gcpkt->id));
|
|
|
|
if (!port) {
|
2011-07-07 16:46:13 +04:00
|
|
|
error_report("virtio-serial-bus: Unexpected port id %u for device %s",
|
virtio-serial: Fix segfault on guest boot
If I start qemu with:
# qemu -hda disks/test.img -enable-kvm -m 1G -snapshot \
-device virtio-serial \
-chardev socket,host=localhost,port=1234,server,nowait,id=foo \
-device virtserialport,chardev=foo,name=org.qemu.guest_agent
I get a segfault when booting a Fedora 14 guest. The backtrace says:
Program terminated with signal 11, Segmentation fault.
#0 0x0000000000420850 in handle_control_message (vser=0x3732bd0, buf=0x2c173e0, len=8) at /home/lcapitulino/src/qmp-unstable/hw/virtio-serial-bus.c:335
335 info = DO_UPCAST(VirtIOSerialPortInfo, qdev, port->dev.info);
What's happening is VIRTIO_CONSOLE_DEVICE_READY is a message for the
whole device, not for an individual port. So port is NULL. This bug was
introduced by commit a15bb0d6a981de749452a5180fc8084d625671da.
This commit fixes that by making the port returned by find_port_by_id()
be used only by the VIRTIO_CONSOLE_PORT_READY and
VIRTIO_CONSOLE_PORT_OPEN messages.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
2011-06-17 22:58:08 +04:00
|
|
|
ldl_p(&gcpkt->id), vser->bus.qbus.name);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2011-07-05 15:06:39 +04:00
|
|
|
trace_virtio_serial_handle_control_message_port(port->id);
|
|
|
|
|
2011-12-04 22:38:12 +04:00
|
|
|
vsc = VIRTIO_SERIAL_PORT_GET_CLASS(port);
|
virtio-serial: Fix segfault on guest boot
If I start qemu with:
# qemu -hda disks/test.img -enable-kvm -m 1G -snapshot \
-device virtio-serial \
-chardev socket,host=localhost,port=1234,server,nowait,id=foo \
-device virtserialport,chardev=foo,name=org.qemu.guest_agent
I get a segfault when booting a Fedora 14 guest. The backtrace says:
Program terminated with signal 11, Segmentation fault.
#0 0x0000000000420850 in handle_control_message (vser=0x3732bd0, buf=0x2c173e0, len=8) at /home/lcapitulino/src/qmp-unstable/hw/virtio-serial-bus.c:335
335 info = DO_UPCAST(VirtIOSerialPortInfo, qdev, port->dev.info);
What's happening is VIRTIO_CONSOLE_DEVICE_READY is a message for the
whole device, not for an individual port. So port is NULL. This bug was
introduced by commit a15bb0d6a981de749452a5180fc8084d625671da.
This commit fixes that by making the port returned by find_port_by_id()
be used only by the VIRTIO_CONSOLE_PORT_READY and
VIRTIO_CONSOLE_PORT_OPEN messages.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
2011-06-17 22:58:08 +04:00
|
|
|
|
|
|
|
switch(cpkt.event) {
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
case VIRTIO_CONSOLE_PORT_READY:
|
2010-04-27 16:34:03 +04:00
|
|
|
if (!cpkt.value) {
|
2011-06-22 16:03:54 +04:00
|
|
|
error_report("virtio-serial-bus: Guest failure in adding port %u for device %s",
|
2011-05-25 16:21:10 +04:00
|
|
|
port->id, vser->bus.qbus.name);
|
2010-04-27 16:34:03 +04:00
|
|
|
break;
|
|
|
|
}
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
/*
|
|
|
|
* Now that we know the guest asked for the port name, we're
|
|
|
|
* sure the guest has initialised whatever state is necessary
|
|
|
|
* for this port. Now's a good time to let the guest know if
|
|
|
|
* this port is a console port so that the guest can hook it
|
|
|
|
* up to hvc.
|
|
|
|
*/
|
2011-12-04 22:38:12 +04:00
|
|
|
if (vsc->is_console) {
|
2012-12-12 16:56:09 +04:00
|
|
|
send_control_event(vser, port->id, VIRTIO_CONSOLE_CONSOLE_PORT, 1);
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
}
|
2010-01-19 22:06:53 +03:00
|
|
|
|
2010-01-19 22:06:54 +03:00
|
|
|
if (port->name) {
|
2012-12-12 16:56:09 +04:00
|
|
|
stl_p(&cpkt.id, port->id);
|
2010-01-19 22:06:54 +03:00
|
|
|
stw_p(&cpkt.event, VIRTIO_CONSOLE_PORT_NAME);
|
|
|
|
stw_p(&cpkt.value, 1);
|
|
|
|
|
|
|
|
buffer_len = sizeof(cpkt) + strlen(port->name) + 1;
|
2011-08-21 07:09:37 +04:00
|
|
|
buffer = g_malloc(buffer_len);
|
2010-01-19 22:06:54 +03:00
|
|
|
|
|
|
|
memcpy(buffer, &cpkt, sizeof(cpkt));
|
|
|
|
memcpy(buffer + sizeof(cpkt), port->name, strlen(port->name));
|
|
|
|
buffer[buffer_len - 1] = 0;
|
|
|
|
|
2012-12-12 16:56:09 +04:00
|
|
|
send_control_msg(vser, buffer, buffer_len);
|
2011-08-21 07:09:37 +04:00
|
|
|
g_free(buffer);
|
2010-01-19 22:06:54 +03:00
|
|
|
}
|
|
|
|
|
2010-01-19 22:06:53 +03:00
|
|
|
if (port->host_connected) {
|
2012-12-12 16:56:09 +04:00
|
|
|
send_control_event(vser, port->id, VIRTIO_CONSOLE_PORT_OPEN, 1);
|
2010-01-19 22:06:53 +03:00
|
|
|
}
|
|
|
|
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
/*
|
|
|
|
* When the guest has asked us for this information it means
|
|
|
|
* the guest is all setup and has its virtqueues
|
|
|
|
* initialised. If some app is interested in knowing about
|
|
|
|
* this event, let it know.
|
|
|
|
*/
|
2011-12-04 22:38:12 +04:00
|
|
|
if (vsc->guest_ready) {
|
|
|
|
vsc->guest_ready(port);
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
}
|
|
|
|
break;
|
2010-01-19 22:06:53 +03:00
|
|
|
|
|
|
|
case VIRTIO_CONSOLE_PORT_OPEN:
|
|
|
|
port->guest_connected = cpkt.value;
|
2013-03-26 14:08:01 +04:00
|
|
|
if (vsc->set_guest_connected) {
|
2010-01-19 22:06:53 +03:00
|
|
|
/* Send the guest opened notification if an app is interested */
|
2013-03-26 14:08:01 +04:00
|
|
|
vsc->set_guest_connected(port, cpkt.value);
|
2010-01-19 22:06:53 +03:00
|
|
|
}
|
|
|
|
break;
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void control_in(VirtIODevice *vdev, VirtQueue *vq)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
static void control_out(VirtIODevice *vdev, VirtQueue *vq)
|
|
|
|
{
|
|
|
|
VirtQueueElement elem;
|
|
|
|
VirtIOSerial *vser;
|
2010-04-27 16:34:07 +04:00
|
|
|
uint8_t *buf;
|
|
|
|
size_t len;
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
|
2013-04-09 16:53:35 +04:00
|
|
|
vser = VIRTIO_SERIAL(vdev);
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
|
2010-04-27 16:34:07 +04:00
|
|
|
len = 0;
|
|
|
|
buf = NULL;
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
while (virtqueue_pop(vq, &elem)) {
|
2012-03-11 17:52:59 +04:00
|
|
|
size_t cur_len;
|
2010-04-27 16:34:07 +04:00
|
|
|
|
|
|
|
cur_len = iov_size(elem.out_sg, elem.out_num);
|
|
|
|
/*
|
|
|
|
* Allocate a new buf only if we didn't have one previously or
|
|
|
|
* if the size of the buf differs
|
|
|
|
*/
|
|
|
|
if (cur_len > len) {
|
2011-08-21 07:09:37 +04:00
|
|
|
g_free(buf);
|
2010-04-27 16:34:07 +04:00
|
|
|
|
2011-08-21 07:09:37 +04:00
|
|
|
buf = g_malloc(cur_len);
|
2010-04-27 16:34:07 +04:00
|
|
|
len = cur_len;
|
|
|
|
}
|
change iov_* function prototypes to be more appropriate
Reorder arguments to be more natural, readable and
consistent with other iov_* functions, and change
argument names, from:
iov_from_buf(iov, iov_cnt, buf, iov_off, size)
to
iov_from_buf(iov, iov_cnt, offset, buf, bytes)
The result becomes natural English:
copy data to this `iov' vector with `iov_cnt'
elements starting at byte offset `offset'
from memory buffer `buf', processing `bytes'
bytes max.
(Try to read the original prototype this way).
Also change iov_clear() to more general iov_memset()
(it uses memset() internally anyway).
While at it, add comments to the header file
describing what the routines actually does.
The patch only renames argumens in the header, but
keeps old names in the implementation. The next
patch will touch actual code to match.
Now, it might look wrong to pay so much attention
to so small things. But we've so many badly designed
interfaces already so the whole thing becomes rather
confusing or error prone. One example of this is
previous commit and small discussion which emerged
from it, with an outcome that the utility functions
like these aren't well-understdandable, leading to
strange usage cases. That's why I paid quite some
attention to this set of functions and a few
others in subsequent patches.
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2012-03-11 18:05:12 +04:00
|
|
|
iov_to_buf(elem.out_sg, elem.out_num, 0, buf, cur_len);
|
2010-04-27 16:34:07 +04:00
|
|
|
|
2012-03-11 17:52:59 +04:00
|
|
|
handle_control_message(vser, buf, cur_len);
|
2010-04-27 16:34:09 +04:00
|
|
|
virtqueue_push(vq, &elem, 0);
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
}
|
2011-08-21 07:09:37 +04:00
|
|
|
g_free(buf);
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
virtio_notify(vdev, vq);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Guest wrote something to some port. */
|
|
|
|
static void handle_output(VirtIODevice *vdev, VirtQueue *vq)
|
|
|
|
{
|
|
|
|
VirtIOSerial *vser;
|
2010-04-27 16:34:10 +04:00
|
|
|
VirtIOSerialPort *port;
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
|
2013-04-09 16:53:35 +04:00
|
|
|
vser = VIRTIO_SERIAL(vdev);
|
2010-04-27 16:34:10 +04:00
|
|
|
port = find_port_by_vq(vser, vq);
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
|
2011-12-21 10:58:29 +04:00
|
|
|
if (!port || !port->host_connected) {
|
2011-01-07 12:03:36 +03:00
|
|
|
discard_vq_data(vq, vdev);
|
|
|
|
return;
|
|
|
|
}
|
2011-03-03 10:58:55 +03:00
|
|
|
|
|
|
|
if (!port->throttled) {
|
|
|
|
do_flush_queued_data(port, vq, vdev);
|
2010-04-27 16:34:11 +04:00
|
|
|
return;
|
|
|
|
}
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
static void handle_input(VirtIODevice *vdev, VirtQueue *vq)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
static uint32_t get_features(VirtIODevice *vdev, uint32_t features)
|
|
|
|
{
|
2010-04-27 16:34:00 +04:00
|
|
|
VirtIOSerial *vser;
|
|
|
|
|
2013-04-09 16:53:35 +04:00
|
|
|
vser = VIRTIO_SERIAL(vdev);
|
2010-04-27 16:34:00 +04:00
|
|
|
|
2011-05-25 16:21:10 +04:00
|
|
|
if (vser->bus.max_nr_ports > 1) {
|
2010-02-15 18:13:56 +03:00
|
|
|
features |= (1 << VIRTIO_CONSOLE_F_MULTIPORT);
|
|
|
|
}
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
return features;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Guest requested config info */
|
|
|
|
static void get_config(VirtIODevice *vdev, uint8_t *config_data)
|
|
|
|
{
|
|
|
|
VirtIOSerial *vser;
|
|
|
|
|
2013-04-09 16:53:35 +04:00
|
|
|
vser = VIRTIO_SERIAL(vdev);
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
memcpy(config_data, &vser->config, sizeof(struct virtio_console_config));
|
|
|
|
}
|
|
|
|
|
|
|
|
static void set_config(VirtIODevice *vdev, const uint8_t *config_data)
|
|
|
|
{
|
|
|
|
struct virtio_console_config config;
|
|
|
|
|
|
|
|
memcpy(&config, config_data, sizeof(config));
|
|
|
|
}
|
|
|
|
|
2012-04-24 18:03:59 +04:00
|
|
|
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;
|
2013-03-26 14:08:01 +04:00
|
|
|
if (vsc->set_guest_connected) {
|
|
|
|
vsc->set_guest_connected(port, false);
|
|
|
|
}
|
2012-04-24 18:03:59 +04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-04-23 19:23:10 +04:00
|
|
|
static void set_status(VirtIODevice *vdev, uint8_t status)
|
|
|
|
{
|
|
|
|
VirtIOSerial *vser;
|
|
|
|
VirtIOSerialPort *port;
|
|
|
|
|
2013-04-09 16:53:35 +04:00
|
|
|
vser = VIRTIO_SERIAL(vdev);
|
2012-04-23 19:23:10 +04:00
|
|
|
port = find_port_by_id(vser, 0);
|
|
|
|
|
|
|
|
if (port && !use_multiport(port->vser)
|
|
|
|
&& (status & VIRTIO_CONFIG_S_DRIVER_OK)) {
|
|
|
|
/*
|
|
|
|
* Non-multiport guests won't be able to tell us guest
|
|
|
|
* open/close status. Such guests can only have a port at id
|
|
|
|
* 0, so set guest_connected for such ports as soon as guest
|
|
|
|
* is up.
|
|
|
|
*/
|
|
|
|
port->guest_connected = true;
|
|
|
|
}
|
2012-04-24 18:03:59 +04:00
|
|
|
if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) {
|
|
|
|
guest_reset(vser);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void vser_reset(VirtIODevice *vdev)
|
|
|
|
{
|
|
|
|
VirtIOSerial *vser;
|
|
|
|
|
2013-04-09 16:53:35 +04:00
|
|
|
vser = VIRTIO_SERIAL(vdev);
|
2012-04-24 18:03:59 +04:00
|
|
|
guest_reset(vser);
|
2012-04-23 19:23:10 +04:00
|
|
|
}
|
|
|
|
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
static void virtio_serial_save(QEMUFile *f, void *opaque)
|
|
|
|
{
|
2013-04-09 16:53:35 +04:00
|
|
|
VirtIOSerial *s = VIRTIO_SERIAL(opaque);
|
2010-01-19 22:06:53 +03:00
|
|
|
VirtIOSerialPort *port;
|
|
|
|
uint32_t nr_active_ports;
|
2011-04-19 06:03:46 +04:00
|
|
|
unsigned int i, max_nr_ports;
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
|
|
|
|
/* The virtio device */
|
2013-04-09 16:53:35 +04:00
|
|
|
virtio_save(VIRTIO_DEVICE(s), f);
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
|
|
|
|
/* The config space */
|
|
|
|
qemu_put_be16s(f, &s->config.cols);
|
|
|
|
qemu_put_be16s(f, &s->config.rows);
|
2010-01-19 22:06:53 +03:00
|
|
|
|
2010-04-27 16:33:59 +04:00
|
|
|
qemu_put_be32s(f, &s->config.max_nr_ports);
|
|
|
|
|
|
|
|
/* The ports map */
|
2011-04-19 06:03:46 +04:00
|
|
|
max_nr_ports = tswap32(s->config.max_nr_ports);
|
|
|
|
for (i = 0; i < (max_nr_ports + 31) / 32; i++) {
|
2010-04-27 16:33:59 +04:00
|
|
|
qemu_put_be32s(f, &s->ports_map[i]);
|
|
|
|
}
|
2010-01-19 22:06:53 +03:00
|
|
|
|
2010-04-27 16:33:59 +04:00
|
|
|
/* Ports */
|
2010-04-27 16:33:55 +04:00
|
|
|
|
2010-01-19 22:06:53 +03:00
|
|
|
nr_active_ports = 0;
|
2010-04-27 16:33:55 +04:00
|
|
|
QTAILQ_FOREACH(port, &s->ports, next) {
|
2010-01-19 22:06:53 +03:00
|
|
|
nr_active_ports++;
|
2010-04-27 16:33:55 +04:00
|
|
|
}
|
2010-01-19 22:06:53 +03:00
|
|
|
|
|
|
|
qemu_put_be32s(f, &nr_active_ports);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Items in struct VirtIOSerialPort.
|
|
|
|
*/
|
|
|
|
QTAILQ_FOREACH(port, &s->ports, next) {
|
2011-01-19 13:37:10 +03:00
|
|
|
uint32_t elem_popped;
|
|
|
|
|
2010-01-19 22:06:53 +03:00
|
|
|
qemu_put_be32s(f, &port->id);
|
|
|
|
qemu_put_byte(f, port->guest_connected);
|
2010-04-27 16:33:58 +04:00
|
|
|
qemu_put_byte(f, port->host_connected);
|
2011-01-19 13:37:10 +03:00
|
|
|
|
|
|
|
elem_popped = 0;
|
|
|
|
if (port->elem.out_num) {
|
|
|
|
elem_popped = 1;
|
|
|
|
}
|
|
|
|
qemu_put_be32s(f, &elem_popped);
|
|
|
|
if (elem_popped) {
|
|
|
|
qemu_put_be32s(f, &port->iov_idx);
|
|
|
|
qemu_put_be64s(f, &port->iov_offset);
|
|
|
|
|
|
|
|
qemu_put_buffer(f, (unsigned char *)&port->elem,
|
|
|
|
sizeof(port->elem));
|
|
|
|
}
|
2010-01-19 22:06:53 +03:00
|
|
|
}
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
}
|
|
|
|
|
2012-11-14 17:09:07 +04:00
|
|
|
static void virtio_serial_post_load_timer_cb(void *opaque)
|
|
|
|
{
|
2012-11-29 14:14:44 +04:00
|
|
|
uint32_t i;
|
2013-04-09 16:53:35 +04:00
|
|
|
VirtIOSerial *s = VIRTIO_SERIAL(opaque);
|
2012-11-14 17:09:07 +04:00
|
|
|
VirtIOSerialPort *port;
|
|
|
|
uint8_t host_connected;
|
2013-03-26 14:08:02 +04:00
|
|
|
VirtIOSerialPortClass *vsc;
|
2012-11-14 17:09:07 +04:00
|
|
|
|
2012-11-29 23:24:44 +04:00
|
|
|
if (!s->post_load) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
for (i = 0 ; i < s->post_load->nr_active_ports; ++i) {
|
|
|
|
port = s->post_load->connected[i].port;
|
|
|
|
host_connected = s->post_load->connected[i].host_connected;
|
2012-11-14 17:09:07 +04:00
|
|
|
if (host_connected != port->host_connected) {
|
|
|
|
/*
|
|
|
|
* We have to let the guest know of the host connection
|
|
|
|
* status change
|
|
|
|
*/
|
2012-12-12 16:56:09 +04:00
|
|
|
send_control_event(s, port->id, VIRTIO_CONSOLE_PORT_OPEN,
|
2012-11-14 17:09:07 +04:00
|
|
|
port->host_connected);
|
|
|
|
}
|
2013-03-26 14:08:02 +04:00
|
|
|
vsc = VIRTIO_SERIAL_PORT_GET_CLASS(port);
|
|
|
|
if (vsc->set_guest_connected) {
|
|
|
|
vsc->set_guest_connected(port, port->guest_connected);
|
|
|
|
}
|
2012-11-14 17:09:07 +04:00
|
|
|
}
|
2012-11-29 23:24:44 +04:00
|
|
|
g_free(s->post_load->connected);
|
|
|
|
qemu_free_timer(s->post_load->timer);
|
|
|
|
g_free(s->post_load);
|
|
|
|
s->post_load = NULL;
|
2012-11-14 17:09:07 +04:00
|
|
|
}
|
|
|
|
|
2012-11-29 15:32:14 +04:00
|
|
|
static int fetch_active_ports_list(QEMUFile *f, int version_id,
|
|
|
|
VirtIOSerial *s, uint32_t nr_active_ports)
|
|
|
|
{
|
|
|
|
uint32_t i;
|
|
|
|
|
2012-11-29 23:24:44 +04:00
|
|
|
s->post_load = g_malloc0(sizeof(*s->post_load));
|
|
|
|
s->post_load->nr_active_ports = nr_active_ports;
|
|
|
|
s->post_load->connected =
|
|
|
|
g_malloc0(sizeof(*s->post_load->connected) * nr_active_ports);
|
|
|
|
|
|
|
|
s->post_load->timer = qemu_new_timer_ns(vm_clock,
|
|
|
|
virtio_serial_post_load_timer_cb,
|
|
|
|
s);
|
2012-11-29 15:32:14 +04:00
|
|
|
|
|
|
|
/* Items in struct VirtIOSerialPort */
|
|
|
|
for (i = 0; i < nr_active_ports; i++) {
|
|
|
|
VirtIOSerialPort *port;
|
|
|
|
uint32_t id;
|
|
|
|
|
|
|
|
id = qemu_get_be32(f);
|
|
|
|
port = find_port_by_id(s, id);
|
|
|
|
if (!port) {
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
port->guest_connected = qemu_get_byte(f);
|
2012-11-29 23:24:44 +04:00
|
|
|
s->post_load->connected[i].port = port;
|
|
|
|
s->post_load->connected[i].host_connected = qemu_get_byte(f);
|
2012-11-29 15:32:14 +04:00
|
|
|
|
|
|
|
if (version_id > 2) {
|
|
|
|
uint32_t elem_popped;
|
|
|
|
|
|
|
|
qemu_get_be32s(f, &elem_popped);
|
|
|
|
if (elem_popped) {
|
|
|
|
qemu_get_be32s(f, &port->iov_idx);
|
|
|
|
qemu_get_be64s(f, &port->iov_offset);
|
|
|
|
|
|
|
|
qemu_get_buffer(f, (unsigned char *)&port->elem,
|
|
|
|
sizeof(port->elem));
|
|
|
|
virtqueue_map_sg(port->elem.in_sg, port->elem.in_addr,
|
|
|
|
port->elem.in_num, 1);
|
|
|
|
virtqueue_map_sg(port->elem.out_sg, port->elem.out_addr,
|
|
|
|
port->elem.out_num, 1);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Port was throttled on source machine. Let's
|
|
|
|
* unthrottle it here so data starts flowing again.
|
|
|
|
*/
|
|
|
|
virtio_serial_throttle_port(port, false);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2012-11-29 23:24:44 +04:00
|
|
|
qemu_mod_timer(s->post_load->timer, 1);
|
2012-11-29 15:32:14 +04:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
static int virtio_serial_load(QEMUFile *f, void *opaque, int version_id)
|
|
|
|
{
|
2013-04-09 16:53:35 +04:00
|
|
|
VirtIOSerial *s = VIRTIO_SERIAL(opaque);
|
2010-05-31 18:19:43 +04:00
|
|
|
uint32_t max_nr_ports, nr_active_ports, ports_map;
|
2010-01-19 22:06:53 +03:00
|
|
|
unsigned int i;
|
2012-05-16 14:21:35 +04:00
|
|
|
int ret;
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
|
2011-01-19 13:37:10 +03:00
|
|
|
if (version_id > 3) {
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
2010-01-19 22:06:53 +03:00
|
|
|
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
/* The virtio device */
|
2013-04-09 16:53:35 +04:00
|
|
|
ret = virtio_load(VIRTIO_DEVICE(s), f);
|
2012-05-16 14:21:35 +04:00
|
|
|
if (ret) {
|
|
|
|
return ret;
|
|
|
|
}
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
|
|
|
|
if (version_id < 2) {
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* The config space */
|
|
|
|
qemu_get_be16s(f, &s->config.cols);
|
|
|
|
qemu_get_be16s(f, &s->config.rows);
|
2010-04-27 16:33:56 +04:00
|
|
|
|
2010-04-27 16:33:59 +04:00
|
|
|
qemu_get_be32s(f, &max_nr_ports);
|
2011-04-19 06:03:46 +04:00
|
|
|
tswap32s(&max_nr_ports);
|
|
|
|
if (max_nr_ports > tswap32(s->config.max_nr_ports)) {
|
2010-04-27 16:33:59 +04:00
|
|
|
/* Source could have had more ports than us. Fail migration. */
|
2010-04-27 16:33:56 +04:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
|
2010-04-27 16:33:59 +04:00
|
|
|
for (i = 0; i < (max_nr_ports + 31) / 32; i++) {
|
2010-05-31 18:19:43 +04:00
|
|
|
qemu_get_be32s(f, &ports_map);
|
2010-04-27 16:33:59 +04:00
|
|
|
|
2010-05-31 18:19:43 +04:00
|
|
|
if (ports_map != s->ports_map[i]) {
|
2010-04-27 16:33:59 +04:00
|
|
|
/*
|
|
|
|
* Ports active on source and destination don't
|
|
|
|
* match. Fail migration.
|
|
|
|
*/
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
2010-04-27 16:33:55 +04:00
|
|
|
}
|
|
|
|
|
2010-01-19 22:06:53 +03:00
|
|
|
qemu_get_be32s(f, &nr_active_ports);
|
|
|
|
|
2012-11-29 15:32:14 +04:00
|
|
|
if (nr_active_ports) {
|
|
|
|
ret = fetch_active_ports_list(f, version_id, s, nr_active_ports);
|
|
|
|
if (ret) {
|
|
|
|
return ret;
|
2011-01-19 13:37:10 +03:00
|
|
|
}
|
2010-01-19 22:06:53 +03:00
|
|
|
}
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void virtser_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent);
|
|
|
|
|
2012-03-28 20:01:36 +04:00
|
|
|
static Property virtser_props[] = {
|
|
|
|
DEFINE_PROP_UINT32("nr", VirtIOSerialPort, id, VIRTIO_CONSOLE_BAD_ID),
|
|
|
|
DEFINE_PROP_STRING("name", VirtIOSerialPort, name),
|
|
|
|
DEFINE_PROP_END_OF_LIST()
|
|
|
|
};
|
|
|
|
|
2012-05-02 11:00:20 +04:00
|
|
|
#define TYPE_VIRTIO_SERIAL_BUS "virtio-serial-bus"
|
|
|
|
#define VIRTIO_SERIAL_BUS(obj) \
|
|
|
|
OBJECT_CHECK(VirtIOSerialBus, (obj), TYPE_VIRTIO_SERIAL_BUS)
|
|
|
|
|
|
|
|
static void virtser_bus_class_init(ObjectClass *klass, void *data)
|
|
|
|
{
|
|
|
|
BusClass *k = BUS_CLASS(klass);
|
|
|
|
k->print_dev = virtser_bus_dev_print;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const TypeInfo virtser_bus_info = {
|
|
|
|
.name = TYPE_VIRTIO_SERIAL_BUS,
|
|
|
|
.parent = TYPE_BUS,
|
|
|
|
.instance_size = sizeof(VirtIOSerialBus),
|
|
|
|
.class_init = virtser_bus_class_init,
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
};
|
|
|
|
|
|
|
|
static void virtser_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent)
|
|
|
|
{
|
2011-02-24 08:44:12 +03:00
|
|
|
VirtIOSerialPort *port = DO_UPCAST(VirtIOSerialPort, dev, qdev);
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
|
virtio-serial: Clean up virtser_bus_dev_print() output
Old version looks like this in info qtree (last four lines):
dev: virtconsole, id ""
dev-prop: is_console = 1
dev-prop: nr = 0
dev-prop: chardev = <null>
dev-prop: name = <null>
dev-prop-int: id: 0
dev-prop-int: guest_connected: 1
dev-prop-int: host_connected: 0
dev-prop-int: throttled: 0
Indentation is off, and "dev-prop-int" suggests these are properties
you can configure with -device, which isn't the case. The other
buses' print_dev() callbacks don't do that. For instance, PCI's
output looks like this:
class Ethernet controller, addr 00:03.0, pci id 1af4:1000 (sub 1af4:0001)
bar 0: i/o at 0xffffffffffffffff [0x1e]
bar 1: mem at 0xffffffffffffffff [0xffe]
bar 6: mem at 0xffffffffffffffff [0xfffe]
Change virtser_bus_dev_print() to that style. Result:
dev: virtconsole, id ""
dev-prop: is_console = 1
dev-prop: nr = 0
dev-prop: chardev = <null>
dev-prop: name = <null>
port 0, guest on, host off, throttle off
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-05-19 15:37:15 +04:00
|
|
|
monitor_printf(mon, "%*sport %d, guest %s, host %s, throttle %s\n",
|
|
|
|
indent, "", port->id,
|
|
|
|
port->guest_connected ? "on" : "off",
|
|
|
|
port->host_connected ? "on" : "off",
|
|
|
|
port->throttled ? "on" : "off");
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
}
|
|
|
|
|
2010-04-27 16:33:59 +04:00
|
|
|
/* This function is only used if a port id is not provided by the user */
|
|
|
|
static uint32_t find_free_port_id(VirtIOSerial *vser)
|
|
|
|
{
|
2011-04-19 06:03:46 +04:00
|
|
|
unsigned int i, max_nr_ports;
|
2010-04-27 16:33:59 +04:00
|
|
|
|
2011-04-19 06:03:46 +04:00
|
|
|
max_nr_ports = tswap32(vser->config.max_nr_ports);
|
|
|
|
for (i = 0; i < (max_nr_ports + 31) / 32; i++) {
|
2010-04-27 16:33:59 +04:00
|
|
|
uint32_t map, bit;
|
|
|
|
|
|
|
|
map = vser->ports_map[i];
|
|
|
|
bit = ffs(~map);
|
|
|
|
if (bit) {
|
|
|
|
return (bit - 1) + i * 32;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return VIRTIO_CONSOLE_BAD_ID;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void mark_port_added(VirtIOSerial *vser, uint32_t port_id)
|
|
|
|
{
|
|
|
|
unsigned int i;
|
|
|
|
|
|
|
|
i = port_id / 32;
|
|
|
|
vser->ports_map[i] |= 1U << (port_id % 32);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void add_port(VirtIOSerial *vser, uint32_t port_id)
|
|
|
|
{
|
|
|
|
mark_port_added(vser, port_id);
|
2012-12-12 16:56:09 +04:00
|
|
|
send_control_event(vser, port_id, VIRTIO_CONSOLE_PORT_ADD, 1);
|
2010-04-27 16:33:59 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
static void remove_port(VirtIOSerial *vser, uint32_t port_id)
|
|
|
|
{
|
2010-04-27 16:34:11 +04:00
|
|
|
VirtIOSerialPort *port;
|
2010-04-27 16:33:59 +04:00
|
|
|
unsigned int i;
|
|
|
|
|
|
|
|
i = port_id / 32;
|
|
|
|
vser->ports_map[i] &= ~(1U << (port_id % 32));
|
|
|
|
|
2010-04-27 16:34:11 +04:00
|
|
|
port = find_port_by_id(vser, port_id);
|
2012-12-18 11:38:33 +04:00
|
|
|
/*
|
|
|
|
* This function is only called from qdev's unplug callback; if we
|
|
|
|
* get a NULL port here, we're in trouble.
|
|
|
|
*/
|
|
|
|
assert(port);
|
|
|
|
|
2010-04-27 16:34:11 +04:00
|
|
|
/* Flush out any unconsumed buffers first */
|
2013-04-09 16:53:35 +04:00
|
|
|
discard_vq_data(port->ovq, VIRTIO_DEVICE(port->vser));
|
2010-04-27 16:34:11 +04:00
|
|
|
|
2012-12-12 16:56:09 +04:00
|
|
|
send_control_event(vser, port->id, VIRTIO_CONSOLE_PORT_REMOVE, 1);
|
2010-04-27 16:33:59 +04:00
|
|
|
}
|
|
|
|
|
2011-12-10 01:02:56 +04:00
|
|
|
static int virtser_port_qdev_init(DeviceState *qdev)
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
{
|
2011-02-24 08:44:12 +03:00
|
|
|
VirtIOSerialPort *port = DO_UPCAST(VirtIOSerialPort, dev, qdev);
|
2011-12-04 22:38:12 +04:00
|
|
|
VirtIOSerialPortClass *vsc = VIRTIO_SERIAL_PORT_GET_CLASS(port);
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
VirtIOSerialBus *bus = DO_UPCAST(VirtIOSerialBus, qbus, qdev->parent_bus);
|
2011-04-19 06:03:46 +04:00
|
|
|
int ret, max_nr_ports;
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
bool plugging_port0;
|
|
|
|
|
|
|
|
port->vser = bus->vser;
|
2011-04-29 15:25:06 +04:00
|
|
|
port->bh = qemu_bh_new(flush_queued_data_bh, port);
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
|
2011-12-04 22:38:12 +04:00
|
|
|
assert(vsc->have_data);
|
2011-12-21 10:58:29 +04:00
|
|
|
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
/*
|
|
|
|
* Is the first console port we're seeing? If so, put it up at
|
|
|
|
* location 0. This is done for backward compatibility (old
|
|
|
|
* kernel, new qemu).
|
|
|
|
*/
|
2011-12-04 22:38:12 +04:00
|
|
|
plugging_port0 = vsc->is_console && !find_port_by_id(port->vser, 0);
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
|
2010-04-27 16:33:59 +04:00
|
|
|
if (find_port_by_id(port->vser, port->id)) {
|
2011-06-22 16:03:54 +04:00
|
|
|
error_report("virtio-serial-bus: A port already exists at id %u",
|
2010-04-27 16:33:59 +04:00
|
|
|
port->id);
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2010-04-27 16:33:59 +04:00
|
|
|
if (port->id == VIRTIO_CONSOLE_BAD_ID) {
|
|
|
|
if (plugging_port0) {
|
|
|
|
port->id = 0;
|
|
|
|
} else {
|
|
|
|
port->id = find_free_port_id(port->vser);
|
|
|
|
if (port->id == VIRTIO_CONSOLE_BAD_ID) {
|
2011-06-22 16:03:54 +04:00
|
|
|
error_report("virtio-serial-bus: Maximum port limit for this device reached");
|
2010-04-27 16:33:59 +04:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2011-04-19 06:03:46 +04:00
|
|
|
max_nr_ports = tswap32(port->vser->config.max_nr_ports);
|
|
|
|
if (port->id >= max_nr_ports) {
|
2011-06-22 16:03:54 +04:00
|
|
|
error_report("virtio-serial-bus: Out-of-range port id specified, max. allowed: %u",
|
2011-04-19 06:03:46 +04:00
|
|
|
max_nr_ports - 1);
|
2010-04-27 16:33:59 +04:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2011-12-04 22:38:12 +04:00
|
|
|
ret = vsc->init(port);
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
if (ret) {
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2010-12-10 14:21:14 +03:00
|
|
|
port->elem.out_num = 0;
|
|
|
|
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
QTAILQ_INSERT_TAIL(&port->vser->ports, port, next);
|
|
|
|
port->ivq = port->vser->ivqs[port->id];
|
|
|
|
port->ovq = port->vser->ovqs[port->id];
|
|
|
|
|
2010-04-27 16:33:59 +04:00
|
|
|
add_port(port->vser, port->id);
|
|
|
|
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
/* Send an update to the guest about this new port added */
|
2013-04-09 16:53:35 +04:00
|
|
|
virtio_notify_config(VIRTIO_DEVICE(port->vser));
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int virtser_port_qdev_exit(DeviceState *qdev)
|
|
|
|
{
|
2011-02-24 08:44:12 +03:00
|
|
|
VirtIOSerialPort *port = DO_UPCAST(VirtIOSerialPort, dev, qdev);
|
2011-12-04 22:38:12 +04:00
|
|
|
VirtIOSerialPortClass *vsc = VIRTIO_SERIAL_PORT_GET_CLASS(port);
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
VirtIOSerial *vser = port->vser;
|
|
|
|
|
2011-04-29 15:25:06 +04:00
|
|
|
qemu_bh_delete(port->bh);
|
2010-04-27 16:33:59 +04:00
|
|
|
remove_port(port->vser, port->id);
|
2010-01-19 22:06:55 +03:00
|
|
|
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
QTAILQ_REMOVE(&vser->ports, port, next);
|
|
|
|
|
2011-12-04 22:38:12 +04:00
|
|
|
if (vsc->exit) {
|
|
|
|
vsc->exit(port);
|
2011-05-25 16:21:13 +04:00
|
|
|
}
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-04-09 16:53:34 +04:00
|
|
|
static int virtio_serial_device_init(VirtIODevice *vdev)
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
{
|
2013-04-09 16:53:34 +04:00
|
|
|
DeviceState *qdev = DEVICE(vdev);
|
|
|
|
VirtIOSerial *vser = VIRTIO_SERIAL(vdev);
|
2010-07-21 13:38:30 +04:00
|
|
|
uint32_t i, max_supported_ports;
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
|
2013-04-09 16:53:34 +04:00
|
|
|
if (!vser->serial.max_virtserial_ports) {
|
|
|
|
return -1;
|
|
|
|
}
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
|
2010-07-21 13:38:30 +04:00
|
|
|
/* Each port takes 2 queues, and one pair is for the control queue */
|
|
|
|
max_supported_ports = VIRTIO_PCI_QUEUE_MAX / 2 - 1;
|
|
|
|
|
2013-04-09 16:53:34 +04:00
|
|
|
if (vser->serial.max_virtserial_ports > max_supported_ports) {
|
2010-07-21 13:38:30 +04:00
|
|
|
error_report("maximum ports supported: %u", max_supported_ports);
|
2013-04-09 16:53:34 +04:00
|
|
|
return -1;
|
2010-07-21 13:38:30 +04:00
|
|
|
}
|
|
|
|
|
2013-04-09 16:53:34 +04:00
|
|
|
virtio_init(vdev, "virtio-serial", VIRTIO_ID_CONSOLE,
|
|
|
|
sizeof(struct virtio_console_config));
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
|
|
|
|
/* Spawn a new virtio-serial bus on which the ports will ride as devices */
|
2013-04-30 18:08:50 +04:00
|
|
|
qbus_create_inplace(&vser->bus.qbus, TYPE_VIRTIO_SERIAL_BUS, qdev,
|
|
|
|
vdev->bus_name);
|
2011-05-25 16:21:10 +04:00
|
|
|
vser->bus.qbus.allow_hotplug = 1;
|
|
|
|
vser->bus.vser = vser;
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
QTAILQ_INIT(&vser->ports);
|
|
|
|
|
2013-04-09 16:53:34 +04:00
|
|
|
vser->bus.max_nr_ports = vser->serial.max_virtserial_ports;
|
|
|
|
vser->ivqs = g_malloc(vser->serial.max_virtserial_ports
|
|
|
|
* sizeof(VirtQueue *));
|
|
|
|
vser->ovqs = g_malloc(vser->serial.max_virtserial_ports
|
|
|
|
* sizeof(VirtQueue *));
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
|
|
|
|
/* Add a queue for host to guest transfers for port 0 (backward compat) */
|
|
|
|
vser->ivqs[0] = virtio_add_queue(vdev, 128, handle_input);
|
|
|
|
/* Add a queue for guest to host transfers for port 0 (backward compat) */
|
|
|
|
vser->ovqs[0] = virtio_add_queue(vdev, 128, handle_output);
|
|
|
|
|
2010-11-23 14:31:15 +03:00
|
|
|
/* TODO: host to guest notifications can get dropped
|
|
|
|
* if the queue fills up. Implement queueing in host,
|
|
|
|
* this might also make it possible to reduce the control
|
|
|
|
* queue size: as guest preposts buffers there,
|
|
|
|
* this will save 4Kbyte of guest memory per entry. */
|
|
|
|
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
/* control queue: host to guest */
|
2010-11-23 14:31:15 +03:00
|
|
|
vser->c_ivq = virtio_add_queue(vdev, 32, control_in);
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
/* control queue: guest to host */
|
2010-11-23 14:31:15 +03:00
|
|
|
vser->c_ovq = virtio_add_queue(vdev, 32, control_out);
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
|
2011-05-25 16:21:10 +04:00
|
|
|
for (i = 1; i < vser->bus.max_nr_ports; i++) {
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
/* Add a per-port queue for host to guest transfers */
|
|
|
|
vser->ivqs[i] = virtio_add_queue(vdev, 128, handle_input);
|
|
|
|
/* Add a per-per queue for guest to host transfers */
|
|
|
|
vser->ovqs[i] = virtio_add_queue(vdev, 128, handle_output);
|
|
|
|
}
|
|
|
|
|
2013-04-09 16:53:34 +04:00
|
|
|
vser->config.max_nr_ports = tswap32(vser->serial.max_virtserial_ports);
|
|
|
|
vser->ports_map = g_malloc0(((vser->serial.max_virtserial_ports + 31) / 32)
|
2010-05-19 13:31:38 +04:00
|
|
|
* sizeof(vser->ports_map[0]));
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
/*
|
|
|
|
* Reserve location 0 for a console port for backward compat
|
|
|
|
* (old kernel, new qemu)
|
|
|
|
*/
|
2010-04-27 16:33:59 +04:00
|
|
|
mark_port_added(vser, 0);
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
|
2012-11-29 23:24:44 +04:00
|
|
|
vser->post_load = NULL;
|
|
|
|
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
/*
|
|
|
|
* Register for the savevm section with the virtio-console name
|
|
|
|
* to preserve backward compat
|
|
|
|
*/
|
2013-04-09 16:53:34 +04:00
|
|
|
register_savevm(qdev, "virtio-console", -1, 3, virtio_serial_save,
|
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a new
virtio-serial bus that can host console and generic serial ports. The
file hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the
virtio-serial-bus and communicates between the bus and qemu's chardevs.
This commit also includes a few changes to the virtio backing code for
pci and s390 to spawn the virtio-serial bus.
As a result of the qdev conversion, we get rid of a lot of legacy code.
The old-style way of instantiating a virtio console using
-virtioconsole ...
is maintained, but the new, preferred way is to use
-device virtio-serial -device virtconsole,chardev=...
With this commit, multiple devices as well as multiple ports with a
single device can be supported.
For multiple ports support, each port gets an IO vq pair. Since the
guest needs to know in advance how many vqs a particular device will
need, we have to set this number as a property of the virtio-serial
device and also as a config option.
In addition, we also spawn a pair of control IO vqs. This is an internal
channel meant for guest-host communication for things like port
open/close, sending port properties over to the guest, etc.
This commit is a part of a series of other commits to get the full
implementation of multiport support. Future commits will add other
support as well as ride on the savevm version that we bump up here.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-01-19 22:06:52 +03:00
|
|
|
virtio_serial_load, vser);
|
|
|
|
|
2013-04-09 16:53:34 +04:00
|
|
|
return 0;
|
2010-08-19 05:21:04 +04:00
|
|
|
}
|
2011-12-04 22:38:12 +04:00
|
|
|
|
2011-12-08 07:34:16 +04:00
|
|
|
static void virtio_serial_port_class_init(ObjectClass *klass, void *data)
|
|
|
|
{
|
|
|
|
DeviceClass *k = DEVICE_CLASS(klass);
|
|
|
|
k->init = virtser_port_qdev_init;
|
2012-05-02 11:00:20 +04:00
|
|
|
k->bus_type = TYPE_VIRTIO_SERIAL_BUS;
|
2011-12-08 07:34:16 +04:00
|
|
|
k->exit = virtser_port_qdev_exit;
|
|
|
|
k->unplug = qdev_simple_unplug_cb;
|
2012-03-28 20:12:47 +04:00
|
|
|
k->props = virtser_props;
|
2011-12-08 07:34:16 +04:00
|
|
|
}
|
|
|
|
|
2013-01-10 19:19:07 +04:00
|
|
|
static const TypeInfo virtio_serial_port_type_info = {
|
2011-12-04 22:38:12 +04:00
|
|
|
.name = TYPE_VIRTIO_SERIAL_PORT,
|
|
|
|
.parent = TYPE_DEVICE,
|
|
|
|
.instance_size = sizeof(VirtIOSerialPort),
|
|
|
|
.abstract = true,
|
|
|
|
.class_size = sizeof(VirtIOSerialPortClass),
|
2011-12-08 07:34:16 +04:00
|
|
|
.class_init = virtio_serial_port_class_init,
|
2011-12-04 22:38:12 +04:00
|
|
|
};
|
|
|
|
|
2013-04-09 16:53:30 +04:00
|
|
|
static int virtio_serial_device_exit(DeviceState *dev)
|
|
|
|
{
|
|
|
|
VirtIOSerial *vser = VIRTIO_SERIAL(dev);
|
|
|
|
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
|
|
|
|
|
|
|
|
unregister_savevm(dev, "virtio-console", vser);
|
|
|
|
|
|
|
|
g_free(vser->ivqs);
|
|
|
|
g_free(vser->ovqs);
|
|
|
|
g_free(vser->ports_map);
|
|
|
|
if (vser->post_load) {
|
|
|
|
g_free(vser->post_load->connected);
|
|
|
|
qemu_del_timer(vser->post_load->timer);
|
|
|
|
qemu_free_timer(vser->post_load->timer);
|
|
|
|
g_free(vser->post_load);
|
|
|
|
}
|
2013-04-24 12:21:22 +04:00
|
|
|
virtio_cleanup(vdev);
|
2013-04-09 16:53:30 +04:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static Property virtio_serial_properties[] = {
|
|
|
|
DEFINE_VIRTIO_SERIAL_PROPERTIES(VirtIOSerial, serial),
|
|
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
|
|
};
|
|
|
|
|
|
|
|
static void virtio_serial_class_init(ObjectClass *klass, void *data)
|
|
|
|
{
|
|
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
|
|
VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
|
|
|
|
dc->exit = virtio_serial_device_exit;
|
|
|
|
dc->props = virtio_serial_properties;
|
|
|
|
vdc->init = virtio_serial_device_init;
|
|
|
|
vdc->get_features = get_features;
|
|
|
|
vdc->get_config = get_config;
|
|
|
|
vdc->set_config = set_config;
|
|
|
|
vdc->set_status = set_status;
|
|
|
|
vdc->reset = vser_reset;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const TypeInfo virtio_device_info = {
|
|
|
|
.name = TYPE_VIRTIO_SERIAL,
|
|
|
|
.parent = TYPE_VIRTIO_DEVICE,
|
|
|
|
.instance_size = sizeof(VirtIOSerial),
|
|
|
|
.class_init = virtio_serial_class_init,
|
|
|
|
};
|
|
|
|
|
2012-02-09 18:20:55 +04:00
|
|
|
static void virtio_serial_register_types(void)
|
2011-12-04 22:38:12 +04:00
|
|
|
{
|
2012-05-02 11:00:20 +04:00
|
|
|
type_register_static(&virtser_bus_info);
|
2011-12-04 22:38:12 +04:00
|
|
|
type_register_static(&virtio_serial_port_type_info);
|
2013-04-09 16:53:30 +04:00
|
|
|
type_register_static(&virtio_device_info);
|
2011-12-04 22:38:12 +04:00
|
|
|
}
|
|
|
|
|
2012-02-09 18:20:55 +04:00
|
|
|
type_init(virtio_serial_register_types)
|