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Subject: Re: [virtio-dev] [PATCH 0/1] Add "Group Identifier" to virtio PCI capabilities.
On Fri, Jun 1, 2018 at 1:03 PM, Michael S. Tsirkin <mst@redhat.com> wrote: > On Fri, Jun 01, 2018 at 12:01:26PM -0500, Venu Busireddy wrote: >> 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 > > Sorry that I'm unclear. What I meant is the > PCI Express serial number capability (0003h). Then what's on legacy PCI bridge device with i440fx chipset? VPD capability? > > -- > MST > > --------------------------------------------------------------------- > To unsubscribe, e-mail: virtio-dev-unsubscribe@lists.oasis-open.org > For additional commands, e-mail: virtio-dev-help@lists.oasis-open.org >
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