Re: [Qemu-devel] [PATCH] dataplane: support viostor virtio-pci status bit setting

[Vadim Rozenfeld]

On Friday, January 18, 2013 05:59:37 PM Stefan Hajnoczi wrote:
> On Thu, Jan 17, 2013 at 04:46:54PM +0100, Stefan Hajnoczi wrote:
> > The viostor virtio-blk driver for Windows does not use the
> > VIRTIO_CONFIG_S_DRIVER bit.  It only sets the VIRTIO_CONFIG_S_DRIVER_OK
> > bit.
Will be added in the next build.
Thank you,
Vadim.
> > 
> > The viostor driver refreshes the virtio-pci status byte sometimes while
> > the guest is running.  We misinterpret 0x4 (VIRTIO_CONFIG_S_DRIVER_OK)
> > as an indication that virtio-blk-data-plane should be stopped since 0x2
> > (VIRTIO_CONFIG_S_DRIVER) is missing.  The result is that the device
> > becomes unresponsive.
> > 
> > Signed-off-by: Stefan Hajnoczi <address@hidden>
> > ---
> > 
> >  hw/virtio-blk.c | 3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> Applied to my block tree:
> https://github.com/stefanha/qemu/commits/block
> 
> Stefan