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# Date Author Comment
2930b313 07/06/2010 06:05 pm john cooper

Add virtio disk identification support

This patch adds the final missing bits for support of
passing a serial/id string to a virtio-blk guest driver.

The guest-side component already exists in the virtio
driver, and has recently been reworked by Ryan to export...

8cfacf07 03/17/2010 05:42 pm Christoph Hellwig

block: add logical_block_size property

Add a logical block size attribute as various guest side tools only
increase the filesystem sector size based on it, not the advisory
physical block size.

For scsi we already have support for a different logical block size...

9752c371 02/11/2010 12:53 am Christoph Hellwig

virtio-blk: add topology support

Export all topology information in the block config structure,
guarded by a new VIRTIO_BLK_F_TOPOLOGY feature flag.

Signed-off-by: Christoph Hellwig <>
Signed-off-by: Anthony Liguori <>

37d5ddd6 02/11/2010 12:51 am hch@lst.de

virtio-blk: revert serial number support

The addition of the whole ATA IDENTIY page caused the config space to
go above the allowed size in the PCI spec, and thus the feature was
already reverted in the Linux guest driver and disabled by default in
qemu....

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...

aa659be3 09/11/2009 06:19 pm Christoph Hellwig

virtio-blk: add volatile writecache feature

Add a new VIRTIO_BLK_F_WCACHE feature to virtio-blk to indicate that we have
a volatile write cache that needs controlled flushing. Implement a
VIRTIO_BLK_T_FLUSH operation to flush it.

Signed-off-by: Christoph Hellwig <>...

bf011293 06/24/2009 05:09 pm john cooper

Add serial number support for virtio_blk

[brought forward to current qemu-kvm.git]

This patch implements the missing qemu logic to
interpret a '-drive .. serial=XYZ ..' flag for
a virtio_blk device.

The serial number string is contained in a
skeletal IDENTIFY DEVICE data structure and...

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 <>

07e3af9a 05/15/2009 12:35 am Paul Brook

Virtio-blk qdev conversion

Signed-off-by: Paul Brook <>

8b91408b 05/01/2009 05:44 pm Christoph Hellwig

fix virtio_blk_inhdr comment

The inhdr is at the end of the S/G list, not the beginning.

Signed-off-by: Christoph Hellwig <>
Signed-off-by: Anthony Liguori <>

1063b8b1 05/01/2009 05:44 pm Christoph Hellwig

virtio-blk: add SGI_IO passthru support

[had the qemu list address wrong the first time, reply to this message,
not the previous if you were on Cc]

Add support for SG_IO passthru (packet commands) to the virtio-blk
backend. Conceptually based on an older patch from Hannes Reinecke...

9b32d5a5 12/11/2008 11:20 pm aliguori

pci: virtio: use pci id defines (Gerd Hoffman)

Use the defines added by the previous patch in the virtio drivers.
Also remove the pointless vendor and device args from the
virtio_blk_init() function.

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

6e02c38d 12/04/2008 09:52 pm aliguori

Add virtio-blk support

Virtio-blk is a paravirtual block device based on VirtIO. It can be used by
specifying the if=virtio parameter to the -drive parameter.

When using -enable-kvm, it can achieve very good performance compared to IDE or
SCSI.

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