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Re: [Qemu-devel] [Qemu-block] [PATCH v2] virtio: make features 64bit wid
Re: [Qemu-devel] [Qemu-block] [PATCH v2] virtio: make features 64bit wide
Fri, 29 May 2015 10:46:18 -0600
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0
On 05/29/2015 01:51 AM, Gerd Hoffmann wrote:
> Make features 64bit wide everywhere. Exception: command line flags
> remain 32bit and are copyed into the lower 32 host_features at
> initialization time.
> On migration a full 64bit guest_features field is sent if one of the
> high bits is set, additionally to the lower 32bit guest_features field
> which must stay for compatibility reasons. That way we send the lower
> 32 feature bits twice, but that way the code is simpler because we don't
> have to split and compose the 64bit features into two 32bit fields.
> This depends on "move host_features" patch by cornelia.
This paragraph could go after the '---' separator.
> Signed-off-by: Gerd Hoffmann <address@hidden>
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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