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

[Venu Busireddy <venu.busireddy@oracle.com>]

On 2018-06-01 18:42:06 +0300, Michael S. Tsirkin wrote:
> 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

This is applicable to all virtio PCI devices, but not to non-PCI
devices.

> devices? If PCI, we can just add a PCI UUID capability to
> virtio without need to worry about the spec.

What is a "PCI UUID capability?" "PCI Local Bus Specification
Revision 3.0, Appendix H" does not list any such capability.

Regards,

Venu


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