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Re: [Qemu-devel] [PATCH] dataplane: support viostor virtio-pci status bi
From: |
Vadim Rozenfeld |
Subject: |
Re: [Qemu-devel] [PATCH] dataplane: support viostor virtio-pci status bit setting |
Date: |
Sat, 19 Jan 2013 09:59:57 +0200 |
User-agent: |
KMail/1.13.7 (Linux/3.3.0-rc5+; KDE/4.6.5; x86_64; ; ) |
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