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Re: [Qemu-devel] [PATCH] dataplane: support viostor virtio-pci status bi
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From: |
Stefan Hajnoczi |
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Subject: |
Re: [Qemu-devel] [PATCH] dataplane: support viostor virtio-pci status bit setting |
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Date: |
Fri, 18 Jan 2013 16:59:37 +0100 |
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User-agent: |
Mutt/1.5.21 (2010-09-15) |
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.
>
> 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