Re: [virtio-dev] [PATCH 0/1] Add "Group Identifier" to virtio PCI capabilities.

["Michael S. Tsirkin" <mst@redhat.com>]

On Wed, May 23, 2018 at 11:16:12AM -0400, Venu Busireddy wrote:
> During live migration involving passthrough devices, the guest needs
> to know which virtio device will be a fail-over device for a given
> passthrough device.
> 
> Extending the virtio specification with a new "Group Identifier"
> capability allows qemu to set up the grouping at the time the guest
> is created. The "Group Identifier" can be as simple as a number, or an
> UUID. The driver can use the group identifier to pair the virtio device
> with the passthrough device. The passthrough device can contain the
> group identifier in the PCIe bridge to which it is attached.
> 
> Venu Busireddy (1):
>   Add "Group Identifier" to virtio PCI capabilities.
> 
>  content.tex | 43 +++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 43 insertions(+)

Is this a PCI thing, or can this somehow be used with non-PCI
devices? If PCI, we can just add a PCI UUID capability to
virtio without need to worry about the spec.

> 
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