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Re: [Qemu-devel] [PATCH RFC v6 10/20] s390x/virtio-ccw: add virtio set-r
From: |
Stefan Hajnoczi |
Subject: |
Re: [Qemu-devel] [PATCH RFC v6 10/20] s390x/virtio-ccw: add virtio set-revision call |
Date: |
Tue, 20 Jan 2015 11:00:21 +0000 |
User-agent: |
Mutt/1.5.23 (2014-03-12) |
On Thu, Dec 11, 2014 at 02:25:12PM +0100, Cornelia Huck wrote:
> From: Thomas Huth <address@hidden>
>
> Handle the virtio-ccw revision according to what the guest sets.
> When revision 1 is selected, we have a virtio-1 standard device
> with byteswapping for the virtio rings.
>
> When a channel gets disabled, we have to revert to the legacy behavior
> in case the next user of the device does not negotiate the revision 1
> anymore (e.g. the boot firmware uses revision 1, but the operating
> system only uses the legacy mode).
>
> Note that revisions > 0 are still disabled.
>
> Signed-off-by: Thomas Huth <address@hidden>
> Signed-off-by: Cornelia Huck <address@hidden>
> ---
> hw/s390x/virtio-ccw.c | 52
> +++++++++++++++++++++++++++++++++++++++++++++++++
> hw/s390x/virtio-ccw.h | 8 ++++++++
> 2 files changed, 60 insertions(+)
Reviewed-by: Stefan Hajnoczi <address@hidden>
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- Re: [Qemu-devel] [PATCH RFC v6 10/20] s390x/virtio-ccw: add virtio set-revision call,
Stefan Hajnoczi <=