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