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# Date Author Comment
6b331efb 03/21/2011 01:25 pm Amit Shah

virtio-serial: Use a struct to pass config information from proxy

Instead of using a single variable to pass to the virtio_serial_init
function, use a struct so that expanding the number of variables to be
passed on later is easier.

Signed-off-by: Amit Shah <>

5430a28f 02/02/2011 12:50 am mst@redhat.com

vhost: force vhost off for non-MSI guests

When MSI is off, each interrupt needs to be bounced through the io
thread when it's set/cleared, so vhost-net causes more context switches and
higher CPU utilization than userspace virtio which handles networking in...

25db9ebe 01/10/2011 02:44 pm Stefan Hajnoczi

virtio-pci: Use ioeventfd for virtqueue notify

Virtqueue notify is currently handled synchronously in userspace virtio. This
prevents the vcpu from executing guest code while hardware emulation code
handles the notify.

On systems that support KVM, the ioeventfd mechanism can be used to make...

85cf2a8d 01/10/2011 02:44 pm Michael S. Tsirkin

virtio: move vmstate change tracking to core

Move tracking vmstate change from virtio-net to virtio.c
as it is going to be used by virito-blk and virtio-pci
for the ioeventfd support.

Signed-off-by: Michael S. Tsirkin <>

54dd9321 10/07/2010 01:19 pm Michael S. Tsirkin

virtio: change set guest notifier to per-device

When using irqfd with vhost-net to inject interrupts,
a single evenfd might inject multiple interrupts.
Implementing this is much easier with a single
per-device callback to set guest notifiers.

Signed-off-by: Michael S. Tsirkin <>

aab2e8f7 09/08/2010 10:26 pm Anthony Liguori

Merge remote branch 'kwolf/for-anthony' into staging

f0c07c7c 09/07/2010 08:29 pm Alex Williamson

virtio-net: Make tx_timer timeout configurable

Add an option to make the TX mitigation timer adjustable as a device
option. The 150us hard coded default used currently is reasonable,
but may not be suitable for all workloads, this gives us a way to
adjust it using a single binary. We can't support any random option...

42fb2e07 08/30/2010 07:29 pm Kevin Wolf

virtio: Factor virtqueue_map_sg out

Separate the mapping of requests to host memory from the descriptor iteration.
The next patch will make use of it in a different context.

Signed-off-by: Kevin Wolf <>

8b53a865 08/23/2010 12:19 am Amit Shah

virtio-serial: Cleanup on device hot-unplug

Free malloc'ed memory, unregister from savevm and clean up virtio-common
bits on device hot-unplug.

This was found performing a migration after device hot-unplug.

Reported-by: <>
Signed-off-by: Amit Shah <>...

9d0d3138 07/26/2010 02:39 pm Alex Williamson

virtio-blk: Create exit function to unregister savevm

Otherwise we can't migrate after we've removed a virtio block device.

Signed-off-by: Alex Williamson <>
Signed-off-by: Kevin Wolf <>

9f107513 05/03/2010 08:17 pm Anthony Liguori

virtio-9p: Add a virtio 9p device to qemu

This patch doesn't implement the 9p protocol handling
code. It adds a simple device which dump the protocol data.

[: Little-Endian to host format conversion]
[: Multiple-mounts support]...

1cbdabe2 04/01/2010 09:56 pm Michael S. Tsirkin

virtio: notifier support + APIs for queue fields

vhost needs physical addresses for ring and other queue fields,
so add APIs for these. In particular, add binding API to set
host/guest notifiers. Will be used by vhost.

Signed-off-by: Michael S. Tsirkin <>...

3e607cb5 04/01/2010 09:56 pm Michael S. Tsirkin

virtio: add set_status callback

vhost net backend needs to be notified when
frontend status changes. Add a callback,
similar to set_features.

Signed-off-by: Michael S. Tsirkin <>
Signed-off-by: Anthony Liguori <>

2be24aaa 04/01/2010 09:56 pm Michael S. Tsirkin

virtio: move typedef to qemu-common

make it possible to use type without header include,
simplifying header dependencies.

Signed-off-by: Michael S. Tsirkin <>
Signed-off-by: Anthony Liguori <>

428c149b 02/11/2010 12:53 am Christoph Hellwig

block: add topology qdev properties

Add three new qdev properties to export block topology information to
the guest. This is needed to get optimal I/O alignment for RAID arrays
or SSDs.

The options are:

- physical_block_size to specify the physical block size of the device,...
bb61564c 01/20/2010 04:25 pm Amit Shah

virtio: Remove duplicate macro definition for max. virtqueues, bump up the max

VIRTIO_PCI_QUEUE_MAX is redefined in hw/virtio.c. Let's just keep it in
hw/virtio.h.

Also, bump up the value of the maximum allowed virtqueues to 64. This is
in preparation to allow multiple ports per virtio-console device....

98b19252 01/20/2010 04:25 pm Amit Shah

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...

704a76fc 01/11/2010 09:40 pm Michael S. Tsirkin

virtio: rename features -> guest_features

Rename features->guest_features. This is
what they are, avoid confusion with
host features which we also need to keep around.

Signed-off-by: Michael S. Tsirkin <>
Signed-off-by: Anthony Liguori <>

8172539d 01/11/2010 09:40 pm Michael S. Tsirkin

virtio: add features as qdev properties

Add feature bits as properties to virtio. This makes it possible to e.g. define
machine without indirect buffer support, which is required for 0.10
compatibility, or without hardware checksum support, which is required for 0.11...

6d74ca5a 12/12/2009 03:59 pm Michael S. Tsirkin

virtio: verify features on load

migrating between hosts which have different features
might break silently, if the migration destination
does not support some features supported by source.

Prevent this from happening by comparing acked feature
bits with the mask supported by the device....

97b15621 10/27/2009 07:28 pm Gerd Hoffmann

virtio: use qdev properties for configuration.

Signed-off-by: Gerd Hoffmann <>
Signed-off-by: Anthony Liguori <>

c227f099 10/02/2009 12:12 am Anthony Liguori

Revert "Get rid of _t suffix"

In the very least, a change like this requires discussion on the list.

The naming convention is goofy and it causes a massive merge problem. Something
like this must be presented on the list first so people can provide input...

99a0949b 10/01/2009 09:45 pm malc

Get rid of _t suffix

Some not so obvious bits, slirp and Xen were left alone for the time
being.

Signed-off-by: malc <>

d89c682f 09/25/2009 05:31 pm Stefan Weil

Suppress some variants of English in comments

Replace surpress, supress by suppress.

Signed-off-by: Stefan Weil <>
Signed-off-by: Aurelien Jarno <>

d176c495 08/10/2009 09:05 pm Gerd Hoffmann

qdev-ify virtio-blk.

First user of the new drive property. With this patch applied host
and guest config can be specified separately, like this:

-drive if=none,id=disk1,file=/path/to/disk.img
-device virtio-blk-pci,drive=disk1

You can set any property for virtio-blk-pci now. You can set the pci...

ff24bd58 06/24/2009 05:09 pm Michael S. Tsirkin

qemu/virtio: virtio save/load bindings

Implement bindings for virtio save/load. Use them in virtio pci.

Signed-off-by: Michael S. Tsirkin <>
Signed-off-by: Anthony Liguori <>

7055e687 06/24/2009 05:09 pm Michael S. Tsirkin

qemu/virtio: virtio support for many interrupt vectors

Extend virtio to support many interrupt vectors, and rearrange code in
preparation for multi-vector support (mostly move reset out to bindings,
because we will have to reset the vectors in transport-specific code)....

efeea6d0 06/22/2009 06:10 pm Mark McLoughlin

virtio: add support for indirect ring entries

Support a new feature flag for indirect ring entries. These are ring
entries which point to a table of buffer descriptors.

The idea here is to increase the ring capacity by allowing a larger
effective ring size whereby the ring size dictates the number of...

53c25cea 05/18/2009 08:26 pm Paul Brook

Separate virtio PCI code

Split the PCI host bindings from the VRing transport implementation.

Signed-off-by: Paul Brook <>

cf21e106 05/15/2009 12:35 am Paul Brook

Virtio-net qdev conversion

Signed-off-by: Paul Brook <>

b946a153 04/17/2009 08:11 pm aliguori

Introduce VLANClientState::cleanup() (Mark McLoughlin)

We're currently leaking memory and file descriptors on device
hot-unplug.

Signed-off-by: Mark McLoughlin <>
Signed-off-by: Anthony Liguori <>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7150 c046a42c-6fe2-441c-8c8c-71466251a162

8eca6b1b 04/05/2009 08:40 pm aliguori

Fix oops on 2.6.25 guest (Rusty Russell)

I believe this is behind the following:
https://bugs.edge.launchpad.net/ubuntu/jaunty/+source/linux/+bug/331128

virtio_pci in 2.6.25 didn't do feature negotiation correctly: it acked every
bit. Fortunately, we can detect this....

173a543b 02/01/2009 09:26 pm blueswir1

Add and use #defines for PCI device classes

This patch adds and uses #defines for PCI device classes and subclases,
using a new pci_config_set_class() function, similar to the recently
added pci_config_set_vendor_id() and pci_config_set_device_id().

Change since v1: fixed compilation of hw/sun4u.c...

bf9298b9 12/05/2008 10:05 pm aliguori

Make struct iovec universally available

Vectored IO APIs will require some sort of vector argument. It makes sense to
use struct iovec and just define it globally for Windows.

Signed-off-by: Anthony Liguori <>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5889 c046a42c-6fe2-441c-8c8c-71466251a162

bb6834cf 12/04/2008 11:28 pm aliguori

Fix windows build after virtio changes

Windows does not have sys/uio.h and does not have err.h.

Signed-off-by: Anthony Liguori <>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5877 c046a42c-6fe2-441c-8c8c-71466251a162

f46f15bc 12/04/2008 09:58 pm aliguori

Remove TARGET_PAGE_SIZE from virtio interface (Hollis Blanchard)

TARGET_PAGE_SIZE should only be used internal to qemu, not in guest/host
interfaces. The virtio frontend code in Linux uses two constants (PFN shift
and vring alignment) for the interface, so update qemu to match....

967f97fa 12/04/2008 09:38 pm aliguori

Virtio core support

This patch adds core support for VirtIO. VirtIO is a paravirtualization
framework that has been in Linux since 2.6.21. A PCI transport has been
available since 2.6.25. Network drivers are also available for Windows.

Signed-off-by: Anthony Liguori <>...