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# Date Author Comment
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 <>...